Wyniki wyszukiwania - BazTech

1

Development of Technology for the Extraction of Natural Pectin from Juice Production Waste

Davitadze Nazi, Bejanidze Irina, Tsintsadze Maya

Ecological Engineering & Environmental Technology

|

2023

|

Vol. 24, iss. 5

117--130

EN

In the article, the questions of pectin extraction from citrus fruits are discussed. The research was carried out on the extracts obtained after squeezing the juice from citrus fruits: lemon (Georgian and Meer), Washington-Navel orange (Georgia and Turkey), Unshiu mandarin and the largest citrus fruit pomelo (China). Fruits collected in April-December were morphologically divided into flavedo, albedo, and tissue of fruit lobes, from which pectin isolates were obtained. The dependence of the production of isolates on the ratio of components of the hydromodule (acid: water), the type of acid (HCl, HNO3, H2SO4, H2C2O4 and C6 H8 O7), the duration of the process (1, 2, 3, 4, 5 and 24 hours) and the extraction temperature (20°) was investigated., 60°, 80°С), the type and time of fruit ripening, as well as the type of precipitation reagent pectin (AlCl3, CaCl2, 95% C2H5OH, isopropanol) and its concentration, duration of extraction (2h, 8h, 12h, 24h) and temperature (20, 40, 60, 70, 80°С). A technological scheme for obtaining pectin extracts was developed. Established: extraction of pectin depends on the type and time of fruit collection, temperature and duration of extraction, type of extractant; the ratio of water and acid in the hydromodule (Н2О : acid) should be 1:10; isolate should be extracted with HCl, H2SO4 or lemon acid; рН of the hydromodule of the isolate should be 1.8–2.0; Extraction of pectin should be carried out with 95% C2H5OH, during 24 hours, with a module of 1:3 at room temperature. Identification of pectin isolates and obtained samples was carried out by the method of high-efficiency liquid chromatography. Obtained: practically all samples contain pectin and galacturonic acid and do not contain polygalacturonic acid, which indicates the complete extraction of pectin.

2

Increasing Effectiveness of Heavy Metal Sorption by Biosorbent Microalgae Beads

Rinanti Astri, Fachrul Melati Ferianita, Hadisoebroto Rositayanti, Minarti Astari, Sunaryo Thalia

Journal of Ecological Engineering

|

2022

|

Vol. 23, nr 7

50--57

EN

This research was conducted to overcome the Cu2+ heavy metal pollution in the environment through a biotechnological approach with heavy metal sorption process by microalgae beads. Biosorbent in form of beads was produced from Chlorella sorokiniana, Monoraphidium sp., and Scenedesmus obliquus tropical microalgae mobilized with Naalginate polymer. The sorption process is observed on a controlled batch culture with variations of temperature (25, 35, and 45 °C), and observation periods (200th, 220th, 250th, 270th min) as contact time. The absorption efficiency on each temperature variation reaches more than 90%, but the highest absorption efficiency rate is at 92.20% on 35 °C temperature and 200 minutes of contact time. Biosorbent beads with 2–3 mm of diameters show the best sorption ability than the 3–4 mm and 4–5 mm ones. Sorption process is also evident with the existence of intensity alteration on amide, ketone, and sulfhydryl function groups which were consistently weakened until the end of the sorption process. The beads utilized in this research are potentially reusable as biosorbent. Thus, further examination is required to acknowledge the maximum reutilization rate of the beads as biosorbent on heavy metal absorption process.

3

Deep Eutectic Solvents and Their Uses for Air Purification

Janicka Patrycja, Płotka-Wasylka Justyna, Gębicki Jacek

Journal of Ecological Engineering

|

2022

|

Vol. 23, nr 10

181--190

EN

Chemical compounds released into the air by the activities of industrial plants and emitted from many other sources, including in households (paints, waxes, cosmetics, disinfectants, plastic (PVC) flooring), may affect the environment and human health. Thus, air purification is an important issue in the context of caring for the condition of the environment. Deep eutectic solvents (DESs) as liquids with environmentally friendly properties (non-volatile, biodegradable, non-toxic, cheap, easy to prepare) are a promising solution to this problem. This paper reviews the advances made in the application of DESs as sorbents for the purification of atmospheric and indoor air. The potential of DESs and their subclasses (including SUPRAmolecular Deep Eutectic Solvents, SUPRADESs) applications in air purification processes were also summarized.The authors believe that this review can be useful for future readers as a starting point for research in the field of DESs and their application in air purification.

4

Carbonized Sorbents of Shungite and Rice Husk for Purification of Petroleum Contaminated Soils

Ongarbayev Yerdos, Baigulbayeva Moldir, Tileuberdi Yerbol, Ualieva Perizat, Abdieva Gulzhamal

Journal of Ecological Engineering

|

2022

|

Vol. 23, nr 5

16--25

EN

Contamination of soil and water with petroleum during its extraction, collection, transportation, storage and preparation occurs frequently, and purification of oil spills is one of the pressing environmental problems of oil producing organizations. There are a large number of methods for utilization oil spills. The sorption method in combination with bioremediation is capable of effectively purification of petroleum contaminated soils. The paper shows the possibility of using a carbonized mixture of shungite from the Koksu deposit (Kazakhstan) with rice husk as a sorbent and carrier of microorganism strains. The physicochemical properties and elemental composition, as well as the microstructure of carbonized samples were established. The maximum sorption capacity of carbonized sorbents when purifying the soil samples from oil from the Karazhanbas field was 1.86 g/g after 60 days. The carbonized samples with microorganism strains immobilized on them showed a degree of oil destruction reaching 90%.

5

Comparison of hydrogel- and xerogel-based sorbent from Empty Fruit Bunch (EFB)

Alias A.B., Qarizada D., Malik N.S.A., Noraini N.M.R., Rashid Z.A.

Archives of Materials Science and Engineering

|

2022

|

Vol. 118, nr 2

49--60

EN

Purpose: This paper focuses on the synthesis and comparison of hydrogel- and xerogel-based sorbents from EFB. Design/methodology/approach: Hydrogels were synthesised by polymerisation of EFB biochar with acrylamide (AAm) as a monomer, N, N'-Methylenebisacrylamide (MBA) as cross-linker and ammonium persulfate (APS) as initiator, as well as by internal gelation method of sodium alginate, empty fruit bunch (EFB), calcium carbonate (CaCO3), and glucono delta-lactone (GDL). From the alginate hydrogels obtained, xerogels were synthesised via the oven-drying method. Then, EFB-based hydrogel and xerogel sorbents were analysed and compared based on characterisation analysis by using scanning electron microscopy (SEM), Brunauer− Emmett−Teller (BET), Fourier-Transform Infrared Spectroscopy (FTIR), and thermogravimetric analysis (TGA). Findings: The xerogel-based EFB is a better adsorbent than the hydrogel-based EFB because it has a larger pore volume (0.001449 cm3/g), larger pore size (63.7987 nm), higher moisture content (7.97%), lower ash content (12.55%), and is more thermally stable. Research limitations/implications: The research is to compare two new adsorbents, namely Hydrogel and Xerogel, from EFB in terms of their characteristics. Practical implications: Both adsorbents show a highly toxic material uptake, especially EFB xerogel. This adsorbent is comparable with the other commercialised adsorbent. Thus, this product can be a highly potential adsorbent for gas and wastewater adsorption. Originality/value: The authenticity results of this article were found to be 15% similar. The novelty of this paper is to compare the two adsorbents, namely hydrogel and xerogel, that originated from EFB.

6

Usage of Sorbent-Catalyst to Accelerate the Oxidation of Manganese

Gomelya Mykola, Tverdokhlib Mariia, Shabliy Tetyana, Linyucheva Olga

Journal of Ecological Engineering

|

2021

|

Vol. 22, nr 4

232--239

EN

The processes of manganese (II) ions removal from water using sorbent catalysts and ion exchange materials modified with iron oxides were studied. It was shown that manganese ions oxidize very slowly in artesian water, even when the pH is adjusted to 9.0. Intensive aeration of solutions due to stirring also does not promote the oxidation of manganese (II) ions. The degree of manganese extraction due to oxidation is reduced from 20–30% for solutions with a concentration of manganese ions of 1 and 5 mg/dm3 to 11–15% for solutions with a concentration of 15 and 30 mg/dm3. A significant increase in the oxidation efficiency of manganese ions was achieved by using magnetite as a sorbent catalyst. The efficiency of water demanganization increases along with the intensity of water aeration when mixing solutions. It was established that strongly acid cation exchangers provide efficient extraction of manganese ions from water. At the same time, a high exchange capacity of strong acid cation exchange resin KU-2–8 in acid and salt form was noted. It was shown that the capacity of manganese ions of this cation exchange resin in the Ca2+-form is slightly lower. When using the KU-2–8 in Ca2+-form of cation exchange resin to remove manganese ions from the solution already in the first samples, the leakage of manganese ions at the level of 10 mg/dm3 and above was observed. This indicates that this form of ion exchanger is not suitable for deep purification of water from manganese (II) ions. In order to increase the efficiency of manganese ion extraction from water, increase the duration of the filter cycle, magnetite and magnetite-modified KU-2–8 cation exchange resin were used as a sorbent-catalyst. It was shown that the cation exchange resin modified with magnetite provides the removal of a significant part of manganese ions due to catalytic oxidation on magnetite. The conditions of effective manganese extraction under static and dynamic conditions are determined.

7

Sorbent-Catalyst for Acceleration of The Iron Oxidation Process

Gomelya Mykola, Tverdokhlib Mariia, Shabliy Tetyana, Radovenchyk Vyacheslav, Linyucheva Olga

Journal of Ecological Engineering

|

2021

|

Vol. 22, nr 3

221--230

EN

In this work, the process of water deironing by using magnetite as a catalyst to accelerate the oxidation of iron ions in an aqueous medium was investigated. It was shown that the efficiency of iron ion extraction depends on the solution concentration, sorbent dose and contact time. In all cases, the use of magnetite accelerated the process of extraction of iron by more than an order of magnitude in comparison with similar experiments on the oxidation of iron without the addition of a catalyst. At the pH values greater than 6, the use of magnetite as a catalyst contributes to the deep purification of water from iron ions.

8

Efficiency of Sorbents Application for the Decrease of the Residual Content of Oil Products in the Industrial Waste

Tarasova Svetlana, Gaevaya Elena, Bytsko Anastasia

Journal of Ecological Engineering

|

2021

|

Vol. 22, nr 1

36--40

EN

Well drilling involves the formation of the bore mud in a form of drilled solids with waste drilling mud, containing oil products in its structure. Nowadays, the widely used methods such as thermal, physical and biological ones cannot be considered as complex approach to the solution of the problem of the oil refinery wastes handling. Introduction of the peat and natural mineral sorbents into the bore mud allows decreasing the residual content of the oil products, and, thus, decreasing the level of negative influence on the environment. On the basis of the conducted studies, it was revealed that different norms of sorbents and peat introduction into the bore mud decreased the concentration of oil products equally well; therefore, the recommended dosage of sorbents and peat at the low initial values of oil products can be 3–5%. When introducing glauconite in a form of flour and grain there it noted that the size of grain particles of the sorbent influenced insignificantly the decrease of oil products concentration in the bore mud. The use of natural mineral sorbents and peat favorably influences the development of plants. At the same time, the formation of viable phytocenosis with high value of phytomass of vegetative over-ground sprouts takes place.

9

Wpływ wtrysku pylistych sorbentów wapiennych na skuteczność elektrostatycznej separacji frakcji pyłu PM10 i PM2.5

Kalinowska Dominika

Energetyka

|

2021

|

nr 2

129--134

PL

Wejście w życie rygorystycznych przepisów prawa dotyczących emisji do powietrza substancji kwaśnych zmusza obiekty energetycznego spalania paliw do dostosowania się do nowych regulacji. Inwestorzy, aby sprostać postawionym wymaganiom, muszą dokonać wyboru optymalnej drogi do obniżenia emisji szkodliwych substancji. Jednym z wielu rozwiązań, nieingerującym w znaczący sposób w instalację spalania paliw, jest metoda wtrysku suchego sorbentu (ang. dry sorbent injection – DSI), polegająca na bezpośrednim wtrysku suchego materiału (węglanu wapnia lub węglanu sodu) do strumienia spalin. Mimo szeregu zalet, jakimi są stosunkowo niskie koszty inwestycyjne czy możliwość prowadzenia nieprzerwanej eksploatacji ciągu technologicznego, należy wziąć pod uwagę na przykład kwestię warunków pracy zainstalowanych urządzeń odpylających. Istotny wpływ na skuteczność przereagowania zanieczyszczeń kwaśnych ma bowiem wielkość ziaren wtryskiwanego sorbentu – im drobniejsza frakcja, tym skuteczniejsze działanie metody DSI. Drobna frakcja znacząco zmniejsza jednak sprawność elektrofiltru. Emisja pyłu zawieszonego do atmosfery jest bardziej szkodliwa, jeśli emitowane cząsteczki mają mniejsze średnice. Ziarna mniejsze niż 2,5 µm z łatwością przedostają się do organizmów poprzez górne drogi oddechowe, stanowiąc tym samym realne zagrożenie dla zdrowia.

EN

As a consequence of the entry into force of stringent legal requirements concerning emissions of acidic substances into the air, combustion plants are obliged to adapt to the new emission standards. To fulfill the requirements, investors have to choose the best way to reduce emissions of harmful substances. One of many solutions, which does not significantly interfere with the fuel combustion installation, is the method of dry sorbent injection (DSI), which consists in an injection of dry material (calcium carbonate or sodium carbonate) directly into the flue gas stream. This process offers a number of advantages, such as a relatively low investment cost or uninterruptible operation of the process line. However, one should also take into account, for example, operating conditions of the installed dust collectors. The grain size of the injected sorbent has a significant impact on the effectiveness of the reaction of acidic pollutants – the finer the fraction, the more effective the DSI process. Yet, a fine fraction significantly reduces the ESP efficiency. Particulate matter emissions to the atmosphere are more harmful if the emitted particles are small in diameter. Fine particles smaller than 2.5 µm in diameter easily enter organisms through the upper respiratory tract, thus posing a real threat to human health.

10

Sewage Sludge as a Component to Create a Substrate for Biological Reclamation

Tymchuk Ivan, Malovanyy Myroslav, Shkvirko Oksana, Yatsukh Katerina

Ecological Engineering & Environmental Technology

|

2021

|

Vol. 22, iss. 4

101--110

EN

The main ways of sewage sludge disposal in the European Union and Ukraine were considered. The main problems of sludge utilization in Ukraine were identified. Research on the possibility of using a substrate based on sewage sludge for biological reclamation of disturbed lands was conducted. The quality of the sludge from Lviv WWTP was determined. The best substrate composition for biological land reclamation was determined by using bioindication. It was established that the use of settled sludge observed inhibition of plant growth and development. Introducing additional components to the substrate, in the form of sorbents, makes it possible to increase the content of sewage sludge. Positive changes in plant growth and development when using a soil-based substrate, sewage sludge and sorbent were observed.

11

Chitozan jako alternatywny sorbent w procesie usuwania Am-241 z rozcieńczonych roztworów wodnych

Oszczak-Nowińska Agata

Przemysł Chemiczny

|

2020

|

T. 99, nr 12

1777--1779

PL

Przeprowadzono syntezę sferycznego sorbentu na bazie chitozanu. Określono jego zdolność sorpcyjną, a także możliwości użycia do usuwania radionuklidu Am-241 z rozcieńczonych roztworów wodnych. W celu określenia zdolności sorpcyjnej chitozanu wyznaczono współczynniki dekontaminacji oczyszczanych roztworów oraz wartości współczynników podziału. Symulację rozkładu kompleksów Am(III) w zależności od pH roztworów wykonano za pomocą programu Medusa. Określono trwałość termiczną sorbentu, wykorzystując analizę termograwimetryczną sprzężoną z różnicową kalorymetrią skaningową i spektrometrią mas. Wykazano, że chitozan może stać się alternatywnym sorbentem do oczyszczania roztworów zawierających ciekłe odpady promieniotwórcze.

EN

Spheric chitosan sorbent was prepd. and used for removal of Am-241 from its aq. solns. The sorbability was detd. as decontamination factor and distribution coeff. The parameters depended on pH of soln. and were highest in alkaline solns. The thermogravimetric anal. coupled with differential scanning calorimetry and mass spectrometry were used to det. the thermal stability of the sorbent. Water and CO2 were found in the decompn. products.

12

The effect of porosity on the reactivity of calcium sorbents

Wichliński Michał, Kobyłecki Rafał

Mineralogia

|

2020

|

Vol. 51, iss. 1

37--45

EN

The current work presents the results of seven sorbent samples investigated with respect to SO2 capture. The sorbents’ reactivity and capacity indexes were determined, and the tests were carried out in accordance with the ‘classical’ procedure for limestone sorbents. The reactivity indexes (RIs) of the tested samples were in the range of 2.57 and 3.55 (mol Ca)/(mol S), while the absolute sorption coefficients as determined by the capacity index (CI) varied between 87.9 and 120.6 (g S)/(kg of sorbent). Porosimetric analysis was also carried out and the specific surface area of the samples was found to be between 0.2 and 1.7 m2 /g. The number of micro-, meso- and macro-pores in individual samples was determined from the corresponding pore size distribution histograms, and the values of sorbent RIs and CIs were correlated with the samples’ total porosity and specific surface.

13

Sorption of oil products on the synthetic zeolite granules

Król Magdalena, Rożek Piotr

Mineralogia

|

2020

|

Vol. 51, iss. 1

1--7

EN

In this work, lightweight granules of zeolite Na-P1 based on expanded glass aggregates were synthesized for the application in oil products’ sorption. The sorption of gasoline, diesel and silicone oil tests were also conducted for raw expanded glass, zeolite A, clinoptilolite and mineral sorbent available at a fuel station. All sorbents were also characterized in terms of the phase composition (X-ray diffraction) and structure (infrared spectroscopy). The zeolite Na-P1 granules achieved the highest values of sorption capacities (1.8, 2.1 and 2.6 g/g, respectively), which makes them promising materials for oils’ removal.

14

Desulfurization of Industrial Water-Alkaline Solutions and Receiving New Plastic Oils

Khudoyarova Olga, Gordienko Olga, Blazhko Alina, Sydoruk Tetiana, Ranskiy Anatoliy

Journal of Ecological Engineering

|

2020

|

Vol. 21, nr 6

61--66

EN

The research on the reagent extraction of sulfides from water-alkaline solutions was presented in the article with the purpose of their possible practical use as a component of special high-temperature grease in high-friction steam. The conditions for obtaining pentasulfide sodium and its adsorption on mixed sorbents (AC + K) were established. The complex-coordination mechanism of copper (II) sulfide formation and the method of obtaining new carbon-sulfur-containing plastic oils were offered, as well as their tribological properties in the friction pairs of roller four-row bearings were investigated.

15

Właściwości sorpcyjne karbonizatów z pozostałości węglowej z pirolizy opon

Dębek Cezary, Walendziewski Jerzy

Elastomery

|

2020

|

T. 24, nr 2

63--77

PL

Scharakteryzowano właściwości strukturalne dwóch prób węgla popirolitycznego otrzymanego w wyniku niskotemperaturowej pirolizy opon samochodowych. Próby węgli popirolitycznych różniły się warunkami prowadzenia procesu pirolizy. Materiał węglowy z pirolizy opon poddano karbonizacji i zbadano zmiany strukturalne oraz oceniono ich zdolności sorpcyjne w stosunku do związków modelowych: benzenu, p‑chlorofenolu, błękitu metylenowego oraz czerwieni Kongo. Otrzymane karbonizaty wykazały dużą zdolność sorpcyjną benzenu z roztworu wodnego sięgającą 98%.

EN

Structural properties of two samples of pyrolytic carbon obtained as a result of low‑temperature pyrolysis of car tires were characterized. The tests of pyrolytic carbon differed in conditions of pyrolysis process. Carbon material from the pyrolysis of tires was carbonized and structural changes were examined and their sorption properties were assessed in relation to model compounds: benzene, p‑chlorophenol, methylene blue and Congo red.The obtained carbonizates showed high sorption capacity of benzene from aqueous solution reaching 98%.

16

Investigation of lead removal from drinking water using different sorbents

Albrektienė Ramunė, Paliulis Dainius

Ecological Chemistry and Engineering. S

|

2020

|

Vol. 27, nr 1

67--82

EN

Lead is a heavy metal with strong toxic properties. This chemical element is found in wastewater and sometimes in drinking water. The article deals with the removal of lead(II) ions from polluted water using a sorption process to determine the most effective sorbent for the removal of lead(II) ions. Three sorbents were used in the research: clay, sapropel, and iron sludge. All three sorbents investigated reduce the concentration of lead(II) ions in water: clay efficiency was of 65.7-90 %, sapropel of 94.3-100 %, and iron sludge of 84.3-97 %, depending on sorbent type and contact duration. The research has shown that the most effective way to remove lead(II) ions from the test water is sapropel. Using different amounts of sapropel (1, 2, 3, 4, 5, 6 g/dm3 and 0.1, 0.2, 0.4, 0.5, 0.6, 0.8 g/dm3) and different duration of contact (30, 60, 90, 120 and 150 minutes), the concentration of lead(II) ions in the test water after purification did not exceed the permissible values for drinking water (10 mg/dm3), so that the lowest sapropel content of 0.1 g/dm3 can be used for sorption. Lead(II) ions are most effectively removed when contact time is 30 min.

17

Studying the Efficiency of Treatment Model Mixtures of Petroleum Products with the Modified Sorbent Made of Ash-and-Slag During Dynamic Sorption

Korotkova Tatyana Germanovna, Bushumov Svyatoslav Andreevich, Ksandopulo Svetlana Yurevna, Solonnikova Nataliya Vladimirovna

Journal of Ecological Engineering

|

2019

|

Vol. 20, nr 11

202--209

EN

Experimental studies on the dynamic sorption of model mixtures containing petroleum products were performed. The subject of the study was the modified sorbent from the ash-and-slag wastes accumulated in the ash dump of the Novocherkassk State District Power Plant (SDPP) (Russia, Novocherkassk, Rostov Region), obtained using the method of ash removal. The quantity of the sorbent for each model solution was fixed at 5.0 g. The model solutions in the amount of 1 dm3 were passed through a column filled with the modified sorbent at constant filtration rate w = const with filtrate takeout of 0.1 dm3/min. The pH value of the solution, which is advisable for extracting petroleum products, was determined experimentally. For this purpose, the model solutions, containing 100 mg/dm3 of petroleum products with pH = 1.65, 4.01, 6.86, 8.12, 9.18, and 11.34, were prepared. The optimum pH value of the solution was considered pH = 7.5. The content of petroleum products in the filtrate in all experiments was determined using IR spectrometry. The working range of water pollution with petroleum products was determined on a series of model solutions containing petroleum products in the range between 0.5 and 10 mg/dm3 with the increment of 0.5, between 10 and 100 mg/dm3 with the increment of 10, and between 100 and 1,000 mg/dm3 with the increment of 100. The maximum extraction of petroleum products from the solution was 88.23%. The applicability of the Henry’s law to the range of petroleum products concentrations in the filtrate of 50 mg/dm3 was confirmed. The adsorption equilibrium constant (Henry’s law constant) was determined experimentally. The effect of the natural freshwater matrix on the degree of petroleum products extraction was studied; no significant effect on petroleum products sorption was found. A conclusion was made that the sorbent can ensure the efficiency of water purifying from petroleum products of no less than 85% in the range of pollution between 5 and 300 mg/dm3.

18

On deck oil spill clean-up materials – solution for engine rooms

Ubowska A., Jowtuch K.

New Trends in Production Engineering

|

2018

|

Vol. 1, Iss. 1

11--18

EN

The presence of flammable substances nearby hot surfaces in the engine rooms pose a fire hazard. Therefore the quick and effective removal of oil spills from these areas is of utmost importance. The simplest way is to use sorbent materials having the capacity to absorb oil substances. Oil sorbents comprise of a wide range of organic, inorganic and synthetic products. The choice of form and type of sorbent material depends on the intended application: type of spill, its size and location. The article describes the results of studies aimed to compare the absorbency of selected natural and synthetic sorbents in the context of their application in case of an oil spill in the engine room. Although the natural sorbents should not be used in water, because they absorb it and can in addition contaminate the seabed, they can be used to remove oil spills on the ship. After used they can be disposed on the ship by burning.

19

Treatment of Multi-Tonnage Manganese-Containing Waste Water Using Vermiculite

Matveeva V., Danilov A., Pashkevich M.

Journal of Ecological Engineering

|

2018

|

Vol. 19, nr 1

156--162

EN

The article presents the results of field and laboratory studies on the state of surface waters in the impact zone of one of the largest mining enterprises of the Russian Federation, i.e. Kovdor Mining and Processing Combine. On the basis of the data from the monitoring studies, the patterns of migration and transformation of manganese in the system of wastes of enrichment – surface water – are revealed. In order to solve the existing environmental problem, an effective method of treating sewage from manganese using organic sorbent based on vermiculite is proposed. The results of laboratory tests of the sorbent are described depending on the method of its modification, as well as on the composition and properties of the purified water. The proposed method of sewage treatment will reduce the negative impact of the company on surface water, thereby improving the ecological situation in the study area and improving the quality of life of the local population.

20

Anaerobic Sulphate-Reducing Microbial Process Used for Sorbent Preparation

Jencarova J., Luptakova A.

Inżynieria Mineralna

|

2018

|

R. 19, nr 1

73--76

EN

The presence of metals in waters represents today typical anthropogenic pollution. Their increased content, originating in various industry sectors and previous mining activity, is undesired. High concentrations of metals are hazardous for all living organisms. They may accumulate to toxic levels, cause many disorders and diseases and ecological damage under certain environmental conditions. Sulphate-reducing microbial process utilization is one of the options to prepare applicable sorbent which removes metal ions from solutions. This sorbent is created as a consequence of sulphate-reducing bacteria metabolism in anaerobic environment. It is considered to be able to remove many metals from solutions, such as Zn, Cd, Pb, Cu, Ni, As.

PL

Obecność metali w wodach stanowi obecnie typowe zanieczyszczenie antropogeniczne. Ich podwyższona zawartość, pochodząca z różnych sektorów przemysłu i wcześniejszej działalności górniczej są niepożądane. Wysokie stężenia metali są niebezpieczne dla wszystkich żywych organizmów. Zawartość metali przekraczająca poziom toksyczności powoduje wiele zaburzeń i chorób oraz szkód ekologicznych. Wdrożenie procesów mikrobiologicznych jest jedną z opcji przygotowania sorbentu do usuwania jonów metali z roztworów. Sorbent powstaje w wyniku metabolizmu bakterii redukujących siarczany w środowisku beztlenowym. Sorbent taki jest w stanie usunąć z roztworów takie metale jak Zn, Cd, Pb, Cu, Ni, As.