BazTech - Yadda

1

The influence of citric acid on the extraction level of manganese in green and black tea infusions

Kleszcz Krzysztof, Michoń Katarzyna

Science, Technology and Innovation

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2023

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Vol. 17, no. 1-2

1--8

EN

Manganese concentration in green and black tea (10 samples of each type) was determined by means of graphite-furnace atomic absorption spectrometry. Both the dry leaves and the infusions were analysed. The concentration of manganese in dry leaves was in the range of 502–1277 mg · kg−1 for black tea and 798–1906 mg · kg−1 for green one. Since lemon juice is commonly added for tea to enrich its taste, citric acid was used to simulate lemon juice influence on manganese concentration in the infusions. The infusions prepared with and without citric acid addition were analysed and the results showed significant influence of citric acid on manganese leaching. The average extraction levels of manganese from black tea equal 16% (for non-acidified infusions) and 34% (for acidified ones) while these values for green tea equal 13% and 38%, respectively. Statistical evaluation of the results showed that the differences between acidified and non-acidified infusions were statistically significant. High manganese content makes the tea an important source of manganese in human diet.

2

Odzysk kobaltu i manganu ze strumieni odpadowych przemysłu petrochemicznego na przykładzie procesu produkcji kwasu tereftalowego

Kura Łukasz, Jurczakowski Rafał, Wiśniewski Piotr

Przemysł Chemiczny

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2023

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T. 102, nr 6

600--605

PL

Stwierdzono ilościowe wytrącanie szczawianów kobaltu(II) i manganu(II) (stężenia metali poniżej LOD: Co < 0,35 ppm, Mn < 0,27 ppm) w stężonym roztworze kwasu octowego (90% mas.), powszechnie stosowanym jako rozpuszczalnik w przemysłowych procesach utleniania p-ksylenu do kwasu tereftalowego. Obecność zanieczyszczeń typowych dla procesu utleniania p-ksylenu, czyli kwasu benzoesowego, kwasu bromowodorowego oraz jonów sodu nie miała negatywnego wpływu na powstawanie osadów. Obecność stałego kwasu tereftalowego w mieszaninie reakcyjnej miała pozytywny wpływ na proces odzyskiwania katalizatora. Zaobserwowano, że szczawiany tworzą aglomeraty na powierzchni stałego kwasu tereftalowego, co ułatwia oddzielenie osadu od cieczy macierzystej. Ponadto potwierdzono wysoką efektywność wytrącania w szerokim zakresie stężeń metali (50-1600 ppm). Wyniki pokazują, że strącanie kwasem szczawiowym jest skuteczną metodą odzyskiwania katalizatorów homogenicznych zawierających związki kobaltu(II) i manganu(II).

EN

A 1% soln. of (COOH)₂ in 90% MeCOOH was added to a 90% MeCOOH soln. contg. Co and Mn ions at concns. of 500 and 300 ppm, resp., and impurities typical of the oxidn. of p-xylene to C₆H₄(COOH)₂ (BzOH, HBr and Na ions) in amts. simulating the mother liquor compn. of a real industrial process. After mixing, the Co and Mn contents of the decanted liq. were detd. by AAS. Presence of impurities had no neg. impact on the ppt. formation. The presence of solid C₆H₄(COOH)₂ in the reaction mixt. had a pos. impact on the catalyst recovery process. Oxalates formed agglomerates on the surface of the solid C₆H₄(COOH)₂ which facilitated the sepn. of the ppt. from the mother liquor. The pptn. with (COOH)₂ is an efficient recovery method of spend Co(II) and Mn(II) homogeneous catalysts.

3

Performance of Limestone as a Multi-Media Filter for Manganese Removal from Groundwater

Ahmedi Figene, Thaqi Premton, Tosuni Kaltrina

Journal of Ecological Engineering

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2023

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Vol. 24, nr 6

385--391

EN

According to Council Directive 98/83/EC on the quality of water intended for human consumption, concentration of the manganese in the drinking water should not exceed 0.05 mg/l. However, this level of manganese concentration is higher ingroundwaterof a community (Vitia town) in Kosovo. Groundwater is used for drinking supply of some villages and is only chlorified continuing to the reservoir from where is gravitationallydisseminated to the villages. The manganese level of the water is at the range 0.3 to 0.6 mg/l. Limestone has been provenby many researchers to be a very effective filter material in manganese removal for groundwater.A miniature filtration unit was modeled to investigate the removal efficiency of manganese.The unit consists of local limestone, where a single materialis folded in three layers of different grainsizes. In fact, the aim of this paper was to assess whether limestone as a single material acting as a "multi-media filter" can reduce the manganese concentration in groundwater. On the basis of the analysis of the single snapshot sample,the removal of manganese achieved more than 95% in filtered water. Particularly, this study demonstrates that filtering the water through three layers of different grain sizes of limestone ("multi-media limestone filter") can be a good alternative for manganese removal in groundwater.

4

Kinetic Study of Adsorption of Metal Ions (Iron and Manganese) in Groundwater Using Calcium Carbide Waste

Karim Muhammad Arief, Nasir Subriyer, Widowati Tri Wardani, Hasanudin Udin

Journal of Ecological Engineering

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2023

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Vol. 24, nr 5

155--165

EN

Calcium carbide waste (CCW), the rest of the carbide welding workshop industry, is available in quite a lot and is immediately disposed of into the environment. Because CWW has a high pH value and a large specific surface area, it can act as an adsorbent in removing metals from groundwater. The content of metals in groundwater is indicated by a reddish color; however, upon contact with air, groundwater oxidation causes iron ions and manganese ions to precipitate. Synthetic groundwater was prepared in this experiment using reagents containing and . Observations were made in a batch process to assess the potential and ability of CCW to reduce iron and manganese levels in groundwater. In this study, to achieve equilibrium, CCW was mixed with 100 mL of synthetic solution and shaken at 25°C with a shaker. Operating time, levels of Fe(II) and (Mn(II) metals, and the mass of CCW were some of the parameters studied in this study. CCW was very good at reducing levels of iron ions and manganese ions after 60 minutes of operation. The percentage of removal of iron and manganese ions respectively – successively increased from 93.765 to 97.99% for iron ions and manganese ions from 91.83 to 95.14% for the initial concentration range of 40 mg/L, 60 mg/L, 80 mg/L, and 100 mg/L. Furthermore, the adsorption kinetics of CCW adsorbent in a mixture of iron ion and manganese ion solutions is a second-order kinetic equation. This confirms that the adsorption of CCW on iron ions and manganese ions is a chemisorption process. Calcium carbide waste has the potential to act as an absorbent of heavy metals in groundwater, especially iron and manganese ions.

5

The Effects of Underground Water Treatment Before and After the Modernization of the Water Treatment Plant

Kociuba Agnieszka, Pruss Alina

Journal of Ecological Engineering

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2022

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Vol. 23, nr 10

42--49

EN

The work concerns the effects of the treatment of groundwater contaminated with iron and manganese compounds taken from quaternary deposits. In the treatment process, a simple reagent-free technology based on aeration and rapid filtration processes was used. The article presents an analysis of the results of the quality of treated and abstracted water in the years 2008–2020. The period analyzed covers the modernization of the WTP, which was carried out in 2012. The purpose of modernization was to increase the efficiency of the WTP. After the modernization of the station, the efficiency of iron and manganese removal was found to be very high (99%), and the sequence of technological processes used was correct. The devices operated in the WTP work effectively by treating the water directed to the distribution system, which meets the Polish and EU quality requirements for water intended for human consumption.

6

Modification of Calcium Oxide from Green Mussel Shell with Iron Oxide as a Potential Adsorbent for the Removal of Iron and Manganese Ions from Acid Mine Drainage

Purwaningrum Widia, Hasanudin Hasanudin, Rachmat Addy, Riyanti Fahma, Hariani Poedji Loekitowati

Journal of Ecological Engineering

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2022

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Vol. 23, nr 11

188--201

EN

Acid mine drainage (AMD) has the characteristics of high heavy metal ion content and low pH. This study aimed to synthesize the CaO/Fe3O4 composite for the adsorption of iron and manganese ions from acid mine drainage. CaO was synthesized from the shells of green mussels (Perna viridis). The CaO/ Fe3O4 composites were characterized using XRD, BET surface area, SEM-EDS, and VSM. The functional groups of the composite before and after adsorption were analyzed using FTIR. The adsorption of Fe(II), Fe(III), and Mn(II) ions was carried out with the batch method to determine the effect of pH, contact time, and initial concentration of metal ions. The CaO/ Fe3O4 composite has magnetic properties, as indicated by the saturation magnetization value of 65.49 emu/g. The Langmuir and Freundlich isotherm models were used to describe the adsorption isotherm of the composite for Fe(II), Fe(III), and Mn(II) ions. Investigations were also conducted on adsorption kinetics, including pseudo-first-order and pseudo-second-order, as well as adsorption thermodynamics comprising free energy, enthalpy, and entropy. Pseudo-first-order and Langmuir isotherms are suitable to describe the adsorption of Fe(II), Fe(III), and Mn(II) ions with adsorption capacities of Fe(III) > Fe(II) > Mn(II). Moreover, the adsorption of all ions using the composite occurred spontaneously. The removal effectiveness for Fe and Mn ions from AMD using CaO/ Fe3O4 composite, reached 90.41 and 97.59%, respectively, in volume 100 mL AMD, composite mass 0.4 g, and a contact time of 60 minutes.

7

Fractional Composition of Nickel, Manganese and Iron in Municipal Solid Waste Incineration Bottom Ash

Łukowski Adam

Journal of Ecological Engineering

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2022

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Vol. 23, nr 11

235--240

EN

Fractions of Ni, Mn and Fe in the municipal solid waste incineration (MSWI) bottom ash were investigated. Three fractions of studied metals were separated according to the BCR procedure (acid soluble and exchangeable, reducible and oxidizable). Pseudo-total metal content, pH and dry mass in all samples were evaluated. The share of nickel in fractions followed the sequence: F4 (79.0%) > F3 (9.0%) > F1 (7.5%) > F2 (4.5%), for manganese: F4 (60.4%) > F1 (16.8%) > F2 (13.2%) > F3 (9.6%) and for iron: F4 (74.4%) > F2 (12.6%) > F3 (12.5%) > F1 (0.5%). Mobile pool of metals (F1-F3) contained the least of nickel (21.0%) and the most of manganese (39.7%).

8

Effect of Zeolite and Activated Carbon Thickness Variation as Adsorbent Media in Reducing Phenol and Manganese Levels in Wastewater of Non-Destructive Testing Unit

Fikri Elanda, Farid Reta Athaya Mutiara, Septiati Yosephina Ardiani, Djuhriah Nanny, Hanurawaty Neneng Yetty, Khair Amar Sharaf Eldin

Journal of Ecological Engineering

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2022

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Vol. 23, nr 8

40--48

EN

The production wastewater contains phenol from the Non-Destructive Testing (NDT) unit because it uses solvents; meanwhile, the manganese originates from the metal material washing process. On the basis of laboratory test results, the wastewater originating from the NDT unit of Y Industry, resulted in a phenol level of 2.33 mg/L, exceeding the quality standard of 0.5 mg/L and manganese level of 14.13 mg/L that exceeded the quality standard of 2 mg/L, based on the Regulation of the Minister of the Environment Number 5 of 2014 concerning Wastewater Quality Standards. This research used the pretest-posttest experimental research design without control. The sample in this study was wastewater from the NDT unit of the Y Industry. The average phenol level after passing through the adsorbent media at a thickness of 40 cm, 60 cm, and 80 cm resulted in 0.99 mg/L with 63% reduction, 0.60 mg/L with 77% reduction, and 0,28 mg/L with 89% reduction, respectively. The average manganese level after passing through the adsorbent media at a thickness of 40 cm, 60 cm, and 80 cm resulted in 0.10 mg/L with 61% reduction, 0.06 mg/L with 76% reduction, and 0,05 mg/L with 80% reduction, respectively. The most effective thickness variation in reducing the phenol and manganese levels of NDT wastewater is 80 cm thickness.

9

Geochemical and tectonic characteristics of manganese mineralization in the Yozgat region, Turkey

Öksüz Nursel, Koçak İsmail, Temiz Uğur

Geological Quarterly

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2021

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Vol. 65, No. 2

art. no. 31

EN

North of the Central Anatolian Crystalline Complex and bordered by the İzmir-Ankara-Erzincan Suture Zone, mineralization occurs within ophiolites known as Anatolian Ophiolite Complex. The mineralization is present within banded, laminated and lenticular radiolarites which are intensely fractured and folded. It is distributed around Derbent, Baltasarilar, Cihanpasa, Buyukmahal, Eymir and Kadisehri where pyrolusite, psilomelane, manganite and braunite comprise the main paragenesis and jacobsite, magnetite, limonite and goethite are minor phases. The negative Eu anomaly suggests that the hydrothermal source was distant from the mineralization area or was mixed with seawater. All samples from the Cihanpasa and Buyukmahal areas have a negative Ce anomaly and resemble low-temperature hydrothermal mineral deposits. Samples from other locations (Derbent, Baltasarilar, Cihanpasa, Eymir, Buyukmahal, Tarhana) are characterized by both negative and positive Ce anomalies. From this it can be inferred that both hydrothermal and hydrogenetic processes were active in mineralization. High Ba contents and a LREE-enriched pattern together with negative Ce anomalies and trace element distributions indicate that the mineralization in the area was derived from a primary hydrothermal source. In addition, diagenetic and epigenetic processes may also have played an important role in the manganese mineralization.

10

Bioremediacja wód gruntowych – usuwanie żelaza i manganu

Rygała Anna, Kręgiel Dorota

Gaz, Woda i Technika Sanitarna

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2021

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Nr 4

7--9

PL

Bioremediacja to zaawansowane technologie wykorzystujące warunki środowiskowe (fizyczne, chemiczne, biochemiczne lub mikrobiologiczne), w celu stymulacji mikroorganizmów zdolnych do detoksykacji wód z zanieczyszczeń organicznych lub nieorganicznych. Bioremediacja wód stała się jedną z najpopularniejszych, szeroko stosowanych technologii oczyszczania wód gruntowych, ze względu na stosunkowo niski koszt oraz możliwość adaptacji do lokalnych warunków. Artykuł stanowi przegląd najnowszej wiedzy na temat metod biologicznego usuwania żelaza i manganu z wód gruntowych.

EN

Bioremediation uses advanced technologies and environmental conditions (physical, chemical, microbiological or biochemical), to stimulate microorganisms to detoxify water with organic or inorganic contaminants. Water bioremediation has become one of the most common, widely used groundwater treatment technologies due to its relatively low cost and the ability to adapt to local conditions. This article reviews the latest knowledge on biological methods for removing iron and manganese from groundwater.

11

The Ion-Exchange Properties of Kaolinite in the Practice of Natural Water Purification

Pimneva Lyudmila A., Zagorskaya Alla A.

Ecological Engineering & Environmental Technology

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2021

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Vol. 22, iss. 2

87--91

EN

The article examines the ability of natural clays to extract heavy metal ions from aqueous solutions by ion exchange. The process of extracting metal ions was considered on the example of the absorption of manganese, nickel and cobalt from natural waters. In order to study the chemical and mineralogical composition of natural kaolin, the following were used in the work: X-ray diffraction and X-ray phase methods, as well as IR spectroscopy. The article presents a comparative analysis of the adsorption of manganese, cobalt and nickel ions on natural kaolin under different temperature conditions. The nature of the interaction of the studied metal ions with kaolin was established. The results obtained on the adsorption of the ions under study show the efficiency of using natural kaolin clay for water purification.

12

Compost produced with addition of sewage sludge as a source of Fe and Mn for plant

Gondek Krzysztof, Mierzwa-Hersztek Monika, Kopeć Michał, Spałek Iwona

Ecological Chemistry and Engineering. S

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2021

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Vol. 28, nr 2

259--275

EN

Direct application of sewage sludge to soil is controversial due to, among others, its highly variable composition, odour, and risks for health. The obtained composts with the addition of sewage sludge were tested for the contents and availability of manganese and iron. Once composts were applied to the soil, their effect on the content and availability of Mn and Fe in soil and bioaccumulation in the plant were determined. The addition of sewage sludge enriched composts with manganese and iron, but did not increase the content of water-extracted forms of Mn and Fe. The compost with addition of biochar had more organic matter-bound forms of Mn and Fe. Composts amended with sewage sludge had lower effect on the amount of Poa pratensis L. biomass than maize straw compost. The content of Mn and Fe in Poa pratensis L. was in the range permissible for biomass used as fodder. Smaller addition of all composts to the soil significantly increased the content of mobile manganese forms; however, neither the type nor the dose had effect on the content of iron mobile forms. There was no significant differences in the content of organic matter-bound forms of Mn and Fe in soil after the application of composts.

13

Performance of Mn/Bi2O3 Pyrotechnic Time Delay Compositions

Tichapondwa Shepherd M., Guo Shasha, Roux Willem E.

Central European Journal of Energetic Materials

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2021

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Vol. 18, no. 1

46--62

EN

Chemical time delay detonators are used widely in mine blasting applications. In order to achieve effective blasting, detonations must follow a precisely controlled timing sequence in a specified firing pattern. Silicon fuel-based pyrotechnic compositions are widely used in mining detonators and are well studied. However, some of these formulations are deemed to be problematic, as they contain heavy metals which are bio-accumulative and toxic to the environment. Therefore, there is need to explore alternative formulations which are suitable for these applications. Manganese-fueled systems are attractive due to their metallic properties and several oxidation states of the manganese fuel. This study focused on characterizing the burn properties of Mn/Bi2O3 compositions for slow to intermediate time delay applications. The compositions supported combustion in the 25 to 55 wt.% Mn range in an inert helium atmosphere. Burn rates between 2.5 and 11.2 mm·s–1 were recorded in open burn tests, whilst closed burn tests in glass tubes resulted in burn rates of 6.3 to 11.2 mm·s–1. Both X-ray diffraction analysis of the reaction products and thermodynamic simulations confirmed that MnO and Bi are the main reaction products, with unreacted Mn and Bi2O3 also being detected. This suggests that the dominant reaction for this composition is a simple thermite-type reaction.

14

Badanie wpływu czasu składowania hałd szlamu z mokrego oczyszczania spalin z pieców hutniczych, na zawartość wybranych pierwiastków metali ciężkich

Czekaj Karolina, Klaper Natalia, Kozieł Tomasz

Analit

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2021

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Nr 10

3--12

PL

W niniejszej pracy dokonano analizy wpływu czasu składowania hałd na zawartość wybranych pierwiastków metali ciężkich. Badanym materiałem były dwie hałdy szlamów i osadów pofiltracyjnych z oczyszczania gazów odlotowych, które różniły się czasem składowania. Analizowano je pod kątem wilgotności oraz zawartości cynku, manganu i chromu wykorzystując metodę absorpcyjnej spektroskopii atomowej. Hałda "Dąbrowa Stara", która pochodzi z przełomu roku 2020/2021 wykazała wilgotność na poziomie 39%. Natomiast hałda "Dąbrowa Nowa" została dostarczona we wrześniu 2021 r. i charakteryzowała się wilgotnością 47%. Otrzymane zawartości wody w próbkach zgadzają się z przedziałem otrzymanym przez firmę dla tego rodzaju surowca (30-50%). Badanie zawartości metali ciężkich wykazało największe stężenie cynku ze wszystkich oznaczanych pierwiastków, wyniosło ono dla próbki „Dąbrowa Stara” 17119 [μg/g], a dla próbki „Dąbrowa Nowa” 20385 [μg/g]. Najmniejszą ilość w badanych materiałach stanowił chrom, którego zawartość była nieznaczna. Dla próbki „Dąbrowa Stara” wartość oznaczonego stężenia wyniosła 127 [μg/g], a dla „Dąbrowa Nowa” 150 [μg/g]. Wykazano, że hałda "Dąbrowa Nowa" jest bardziej bogata w cynk, chrom i mangan niż hałda "Dąbrowa Stara". Różnice w zawartościach wykrywanych składników mogły być efektem wymywania ich np. poprzez opady deszczu co było spowodowane różnym czasem składowania obu hałd.

EN

In this publication, the effect of heap storage time on the content of the selected heavy metals was analysed. Two heaps of sludges and filter sludges from waste gas treatment, which differed in storage time, constituted the studied material. They were analyzed for moisture content and zinc, manganese and chromium concentrations using atomic absorption spectroscopy. „Dąbrowa Stara” heap, which dates back to the turn of 2020/2021, showed moisture content of 39%. The „Dąbrowa Nowa” heap, on the other hand, was delivered in September 2021 and had a moisture content of 47%. The obtained water contents in the samples agreed with the range obtained by the company for this type of raw material (30- 50%). The analysis of heavy metal contents showed the highest concentration of zinc of all determined elements, which was 17119 [μg/g] for the sample "Dąbrowa Stara" and 20385 [μg/g] for the sample "Dąbrowa Nowa". Chromium was the least abundant in the studied materials and its content was insignificant. For the sample "Dąbrowa Stara" the value of determined concentration was 127 [μg/g], and for "Dąbrowa Nowa" 150 [μg/g]. It was shown that the „Dąbrowa Nowa” is richer in zinc, chromium and manganese than the „Dąbrowa Stara”. The differences in the contents of the detected components could be the effect of their leaching e.g. by rainfall, which was caused by the different time of storage of the two heaps.

15

Jiroft refractory manganese ore leaching using oxalic acid as reducing agent in sulfuric acid solution

Sobouti Arash, Shafaat Niosha, Abdollahzadeh Ali A.

Physicochemical Problems of Mineral Processing

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2020

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Vol. 56, iss. 2

374--385

EN

Leaching process of Jiroft refractory manganese ore was investigated. The effects of operating parameters such as liquid to solid ratio, pulp temperature, sulfuric acid concentration, and oxalic acid concentration were studied and the optimization was done through the response surface methodology (RSM) based on central composite design (CCD) model. The recoveries of Mn, Fe and Si were selected as response of design. The optimum condition was determined by ANOVA, indicating that the liquid to solid ratio, oxalic acid concentration and pulp temperature for Mn recovery and liquid to solid ratio, pulp temperature and sulfuric acid concentration for Fe recovery and liquid to solid ratio for Si recovery were the most effective parameters, respectively. Under the optimum conditions of liquid to solid ratio= 11.8%, pulp temperature= 70 ℃ sulfuric acid concentration= 40 g/L and oxalic acid concentration= 35 g/L, 71.1%, 4.67% and 0.6% of Mn, Fe and Si were recovered, respectively.

16

Kinetics of oxidation of manganese by potassium permanganate and chloride in the Velekinca water treatment plant, Kosovo

Beluli Valdrin M.

Journal of Water and Land Development

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2020

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no. 47

30--37

EN

Our scientific research is based on oxidation reactions and monitoring of chemical reaction kinetics in the Velekinca groundwaters plant in Gjilan municipality, Kosovo. The GW of this plant contains high concentration of manganese so we need to use potassium permanganate (KMnO4) as one of the most power oxidants in the water treatment plant. In our research the high concentration of Mn in groundwaters is 0.22–0.28 mg∙dm–3 and this concentration is not in accordance with the WHO. Chlorine is one of the most common disinfectants used in the water treatment industry because it has a low cost and immediate effect on the destruction of microorganisms, the concentration of chlorine (Cl2) in our research is 0.1–0.32 mg∙dm–3. The speed of chemical reactions in the technology of GW is extremely important because sometimes in the elimination of chemical pollutants using oxidizing agents often form intermediate species. The speed of reactions indicates how fast chemical bonds are formed in the creation of a product, and this depends on the rate of reaction (XA). The focus for the research is to study the potassium permanganate and chlorine gas reactions in water if it forms intermediate products (intermediate species) due to the high speed of reactions. Scientific research conclusion, intermediate species in the oxidation reactions of Mn and water disinfection with Cl2(g) it is impossible to cause a high rate of chemical reactions from the reaction rate (XA = 1%) to the reaction rate (XA = 99%). The maximum speed at the highest XA Cl2 is from 4.405∙10–11 to 8.87∙10–10 mol∙dm–3∙s–1, while at Mn is (2.030–4.034)∙10–7 mol∙dm–3∙s–1.

17

Optimising the management of mining waste by means of Sentinel-2 imagery: a case study in the Joda West Iron and Manganese Mine (India)

Guglietta Daniela, Belardi Girolamo, Passeri Daniele, Salvatori Rosamaria, Ubaldini Stefano, Casentini Barbara, Trapasso Francesca

Journal of Sustainable Mining

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2020

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Vol. 19, iss. 1

22--32

EN

A smart economy minimizes the production of waste from mining activities and reuses waste as a potential resource, with the goal of moving towards a near-zero waste society. This paper presents integrated multidisciplinary methodology in order to optimise the management of mining waste. The test site is the FeeMn mine in Odisha (India). The mining waste present in the mine has been collected and afterwards X-Ray Powder Diffraction, X-Ray Fluorescence and spectral signatures analysis have been performed for mineralogical, chemical and spectral characterization of the materials. Finally, the classification and mapping of the characterized mining waste was carried out by Sentinel-2A image.

18

Oznaczenie stężeń żelaza i manganu w wodzie z wybranych publicznych zdrojów artezyjskich na terenie Krakowa

Grabowska Karolina, Kałuzińska Klaudia

Analit

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2020

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Nr 9

2--11

PL

W niniejszej pracy dokonano analizy ilościowej żelaza i manganu w wybranych publicznych zdrojach artezyjskich zlokalizowanych na terenie Krakowa. Przeprowadzone badania miały na celu sprawdzenie, czy zawartości Fe i Mn mieszczą się normach dopuszczających wody ze źródeł do spożycia przez ludzi. Do analizy ilościowej wykorzystano metodę atomowej spektrometrii absorpcyjnej, stosując technikę płomieniową. Zdatność do spożycia wód określano w oparciu o Rozporządzenie Ministra Zdrowia z dnia 7 grudnia 2017 r. w sprawie jakości wody przeznaczonej do spożycia przez ludzi.

EN

In this study, quantitative analysis of iron and manganese in water of the selected public artesian wells located in Cracow was performed. The aim of the conducted tests was to check whether the Fe and Mn concentrations were within the standards allowing water from the sources for human consumption. The quantitative analysis was carried out using the atomic absorption spectroscopy method, using the flame technique. The suitability for consumption of water was determined basing on the Regulation of the Minister of Health from 7th December 2017.

19

Badanie akumulacji wybranych metali w wodzie z różnych ujęć rzeki Wisły

Matysiak Sabina, Słowik Martyna

Analit

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2020

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Nr 9

41--52

PL

Celem niniejszej pracy było zbadanie stężeń różnych ujęciach rzeki. Oznaczenie stężenia manganu i żelaza wykonano wykorzystując metodę absorpcyjnej spektrometrii atomowej (ASA), a stężenie chromu oznaczono przy użyciu metody impulsowej woltamperometrii różnicowej adsorpcyjnej strippingowej (DP-AdSV) w układzie z elektrodą rtęciową jako elektrodą pracującą. Przeprowadzone badania nie wykazały przekroczenia dopuszczalnych stężeń oznaczanych pierwiastków w wodzie. Szczególną uwagę zwrócono na próbkę wody pobraną tuż za miejscem zrzutu nieoczyszczonych ścieków komunalnych do rzeki po awarii oczyszczalni ścieków „Czajka" w Warszawie, jednak nie wykazała ona odstępstw od normy. Uzyskane wyniki porównano z obowiązującymi normami.

EN

The aim of this work was to determine the chosen metals concentration in water derived from Vistula River in Cracow and Warsaw. Three water samples were collected from different parts of the river. Atomic Absorption Spectrometry (AAS) was used to determine the concentrations of manganese and iron, whereas measurements of chromium concentration were carried out using differential voltammetry in the system with the CGMDE electrode as a working electrode. The conducted research did not show that the permissible concentrations of the elements in water were exceeded. Particular attention was paid to the water sample collected just after the discharge site of untreated municipal sewage to the Vistula river after the failure of the "Czajka" sewage treatment plant in Warsaw, but it did not show any deviation from the norm. The obtained results were compared with the applicable standards.

20

Wpływ manganu na ograniczenie negatywnego oddziaływania żelaza w stopach Al-Si

Piątkowski Jarosław, Czerepak Mateusz, Wieszała Robert

Rudy i Metale Nieżelazne Recykling

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2019

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R. 64, nr 1

26--32

PL

W pracy przedstawiono badania wpływu dodatku manganu (0,6 i 1,2%mas.) na przebieg procesu krystalizacji i kształtowanie struktury okołoeutektycznego siluminu EN AC-43000. Stwierdzono, iż dodatek Mn powoduje zanik niekorzystnej kruchej fazy β-Al5FeSi na korzyść fazy α-Al15(FeMn)3Si2, która krystalizuje w postaci zwartych, równomiernie rozłożonych w osnowie roztworu stałego a(Al) wielościennych wydzieleń o wymiarach ok. 7–8 mm. Zmiana niekorzystnej morfologii kruchych eutektyk zawierających żelazo przekłada się na niewielki wzrost właściwości mechanicznych, bez pogorszenia plastyczności stopów Al-Si-Mg-Mn.

EN

The paper presents studies on the effect of manganese addition (0.6 and 1.2% by mass) on the course of the crystallization process and shaping the approximate structure of the silicone EN AC-43000. It was found that the addition of Mn causes the disappearance of the disadvantageous fragile β-Al5FeSi phase in favor of the α-Al15(FeMn)3Si2phase, which crystallizes in the form of compact, uniformly distributed solid matrix a(Al) polyhedral particles with dimensions of approx. 7–8 mm. A change in the unfavorable morphology of brittle iron-containing eutectics translates into a small increase in mechanical properties without deterioration of the Al-Si-Mg-Mn alloys.