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Low-Waste Technology for Water Purification from Iron Ions

Trus Inna, Halysh Vita, Gomelya Mukola, Radovenchyk Vyacheslav

Ecological Engineering & Environmental Technology

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2021

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Vol. 22, iss. 4

116--123

EN

As a result of the anthropogenic activity and the continuous increase in the scale of water consumption, surface and groundwater, which are sources of freshwater, have been degraded. Today, most water sources have high iron content. Contamination of groundwater with iron and other metals can occur due to the development of ore deposits and the operation of quarries. The existing technologies solve this problem only partially. Ions of heavy metals are toxic and dangerous for living organisms, including human beings. In this regard, it is important to develop effective methods of water treatment of various pollutants. Today, pollution of water bodies with iron ions has reached a critical level. This creates a problem for many regions not only in Ukraine, but also far beyond its borders. The problem is urgent and needs to be solved. When the pH value in water is less than 6.8–7.0 and the concentration of iron is high, it is advisable to use a combination of a number of methods with the introduction of reagents in order to perform deep purification. The reagent method of deironing is implemented by treating the source water with a suspension of lime water Ca(OH)2. This approach allows deironing water effectively, but its implementation is accompanied by the formation of a large amount of sludge, which must be disposed of. An effective way to dispose of such precipitates is their use as a chemical additive in the production of cement, which was confirmed by the conducted research.

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Evaluation of Optimal Conditions for the Application of Capillary Materials for the Purpose of Water Deironing

Radovenchyk Iaroslav, Trus Inna, Halysh Vita, Krysenko Tamara, Chuprinov Evhen, Ivanchenko Anna

Ecological Engineering & Environmental Technology

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2021

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Vol. 22, iss. 2

1--7

EN

Iron is one of the most common components in water that adversely affect humans, other living organisms and parameters of water bodies. Therefore, during using and consuming natural waters, and discharging sewage into surface water bodies, it is necessary to remove iron compounds from the aquatic environment. The use of capillary materials in water purification processes is a promising area of research. Experimental data proved the high efficiency of capillary materials application, providing higher efficiency of iron ions removal from model solutions for real water sources of different origin compared with the traditional method of settling. The main advantage of the application of materials with capillary properties is the simplicity of implementation of the method and there is no need to use electricity and any additional reagents. The effect of various factors on the process of water deironing with the application of capillary materials was studied. It was found out that the density has a little effect on the process at an iron concentration range from 1 to 5 mg/dm3 . The increase in competing ions content intensifies the process of divalent ferrous ions transition to trivalent. During the deironing of artesian water, the degree of iron removal exceeded 90 %, while the residual concentration was below the MPC.

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Effect of organic substances on the efficiency of Fe(II) to Fe(III) oxidation and removal of iron compounds from groundwater in the sedimentation process

Krupińska I.

Civil and Environmental Engineering Reports

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2017

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No. 26(3)

15--29

EN

One of the problems with iron removal from groundwater is organic matter. The article presents the experiments involved groundwater samples with a high concentration of total iron - amounting to 7.20 mgFe/dm 3 and an increased amount of organic substances (TOC from 5.50 to 7.50 mgC/dm3). The water samples examined differed in terms of the value of the ratio of the TOC concentration and the concentration of total iron (D). It was concluded that with increase in the coexistence ratio of organic substances and total iron in water (D = [TOC]/[Fetot]), efficiency of Fe(II) to Fe(III) oxidization with dissolved oxygen decreased, while the oxidation time was increasing. This rule was not demonstrated for potassium manganate (VII) when used as an oxidizing agent. The application of potassium manganate (VII) for oxidation of Fe(II) ions produced the better results in terms of total iron concentration reduction in the sedimentation process than the oxidation with dissolved oxygen.

PL

Przedmiotem badań była woda podziemna charakteryzująca się wysokim stężeniem żelaza ogólnego do 7,20 mgFe/dm3 oraz podwyższoną zawartością substancji organicznych (OWO od 5,50 do 7,50 mgC/dm3 ). Badane próbki wody różniły się wartością ilorazu stężenia OWO do stężenia żelaza ogólnego (D), udziałem stężenia Fe(II) w stężeniu Feog (C), a jej mętność i intensywność barwy wskazywały na obecność koloidalnych oraz rozpuszczonych połączeń żelaza ze związkami organicznymi. Celem badań było określenie wpływu stężenia substancji organicznych w wodzie podziemnej na skuteczność utleniania Fe(II) do Fe(III) tlenem rozpuszczonym w wodzie lub manganianem (VII) potasu, a także na skuteczność usuwania związków żelaza w procesie sedymentacji. Wykazano, że wraz ze wzrostem wartości współczynnika współwystępowania substancji organicznych i żelaza ogólnego w wodzie surowej (D) zmniejszała się skuteczność utleniania Fe(II) do Fe(III) tlenem rozpuszczonym. W próbkach wody, w których do utleniania Fe(II) stosowano manganian (VII) potasu nie stwierdzono wpływu wartości współczynnika D na skuteczność utlenienia Fe(II) do Fe(III). Zastosowanie manganianu (VII) potasu jako utleniacza zapewniło większą skuteczność usuwania związków żelaza z wody podziemnej w procesie sedymentacji niż napowietrzanie.

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Usuwanie żelaza i manganu z wody : teoria i praktyka

Anielak A. M.

Technologia Wody

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2015

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Nr 1 (39)

14--17

PL

Wody podziemne o ponadnormatywnej zawartości żelaza i manganu oczyszczane są w prostych układach technologicznych, złożonych głównie z napowietrzania i filtracji. Układy te, w zależności od składu wody, mogą być rozbudowane, a także charakteryzować się różną efektywnością oczyszczania. W publikacji przeprowadzono przegląd wybranych badań dotyczących usuwania Mn(II) i Fe(II). Wykazano duże znaczenie w badanym procesie stężenia tlenu, substancji zredukowanych i humusowych, a także mas aktywnych wykazujących właściwości katalityczne.

EN

Groundwaters with a high iron and manganese content are treated in simple technological systems, comprising mainly aeration and filtration. The system configurations as well as their efficiency may vary, depending on the water composition. The paper reviews selected studies on the removal of Mn (II) and Fe (II). It has been shown that an oxygen concentration as well as reduced and humic compounds and active masses of catalytic properties play an important role in the process.

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Usuwanie z wody związków żelaza i manganu metodą filtracji na wybranych złożach

Skoczko I., Piekutin J., Roszczenko A.

Rocznik Ochrona Środowiska

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2015

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Tom 17, cz. 2

1587--1608

EN

The main pollutants of groundwater are iron, manganese and hardness. Although they belong to the group of trace elements necessary for man, their presence in groundwater above a certain level eliminates it for use, mainly for aesthetic reasons. Water contaminated with these compounds has a lot of negative features i.e. discoloration and sludge, metallic taste, odor, turbidity, staining of laundry and sanitation. In addition, promotes the growth of microorganisms that make up the doughy, greasy deposits covering water pipes. According to Health Ministry Regulation about quality of water for human use and according to European Council Directive 98/83/EC iron concentration in water cannot exceed 0,2 mg Fe/l, and manganese 0,05 mg Mn/l. Requirements of the individual industries are even more severe. Often both the concentration of iron and manganese should be reduced up to 0.0 mg/l. It forces the need for effective methods of water treatment. The purpose of the research within this study was to use the selected filter beds for removal of iron and manganese from the water. There were selected four filter masses for experiments that differ in composition and properties. Conducted studies have shown that the tested compounds are difficult to effective elimination from the water. Single processes are not sufficient, what orders to apply multi-step filtration or other processes.

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Wpracowanie złóż filtracyjnych do usuwania żelaza i manganu z wód podziemnych

Jeż-Walkowiak J., Kołaski Ł

Technologia Wody

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2013

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Nr 9 (29)

12--16

PL

Artykuł przedstawia wyniki badań procesu wpracowania złóż filtracyjnych do usuwania żelaza i manganu z wody podziemnej. Badania prowadzono na stacji pilotowej składającej się z trzech kolumn filtracyjnych wypeł¬nionych złożem z czystego piaski kwarcowego oraz dwoma złożami, będącymi mieszaniną piasku kwarcowego i piasków wpracowanych. Piaski wpracowane pochodziły z ZUW w Mosinie i Poznaniu. Na instalację badawczą dopływała woda napowietrzona na urządzeniach technicznych ZUW w Strzyżewicach. Filtrację prowadzono z prędkością równą 7 m/h. Proces wpracowania badanych złóż do usuwania żelaza i manganu został oceniony na podstawie czasu pracy złoża potrzebnego do osiągnięcia oczekiwanych efektów usuwania żelaza i manganu z uzdatnianej wody oraz na podstawie wysokości występujących w złożu stref odżelaziania i odmanganiania.

EN

This paper presents results of the research on activation process of selected filtration materials for iron and manganese removal from groundwater. An experiment was conducted at a pilot plant consisting of free filtra¬tion columns filled with silica sand, and 2 mixed beds: silica sand with 2 activated silica sands from operating WTP. The installation was supplied with aerated natural groundwater. The process of filtration was conducted with the rate of 7 m/h. Activation process was evaluated according to time needed to achieve expected effects of iron and manganese removal as well as the bed depth needed to achieve effluent standards.

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Wysokosprawne metody usuwania żelaza i manganu z wody w stacjach wodociągowych na obszarach niezurbanizowanych

Granops M.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2005

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Vol. 14, No. 2

153--160

EN

The paper discusses issues of iron and manganese removal from underground waters in the filtration process. The results of laboratory-scale tests of the process with filtration beds filled with catalytic mass are presented. Problems involved in operating of several underground water treatment stations using said mass in the South-Eastern Poland were also discussed.