Colloid stability of iron compounds in groundwater of Western Siberia

Shiyan, Ludmila N.; Tropina, Elena A.; Machekhina, Ksenia; Gryaznova, Elena N.; An, Vladimir

doi:10.1186/2193-1801-3-260

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…Colloids produced solely from Fe n+ ions tend to have a particle size of <0.1 micron, while those also containing Ca and/or Al ions will tend to be >1 micron [42].…”

Section: Discussionmentioning

confidence: 99%

Desalination of Irrigation Water Using Metal Polymers

Antia¹

2022

Water

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Rain-fed and irrigated agriculture associated with salinized soil and saline water supplies is characterized by low crop yields. Partial desalination of this saline water will increase crop yields. Recent studies have established that supported metal polymers can be used to produce partially desalinated irrigation water without producing a waste reject brine. This study assesses the ability of more than 90 different unsupported metal polymer formulations (containing one or more of Al, Ca, Fe, K, Mg, Mn, and Zn) to remove Na+ ions and Cl− ions from saline water (seawater, brine, brackish water, and flowback water). The polymers were constructed using a simple sol-gel approach at ambient temperatures. The overall ion removal followed a first-order reaction. Removal selectivity between Na+ and Cl− ions was a function of polymer formulation. Mg@Al polymers preferentially remove Cl− ions, while Fe@Ca polymers tend to remove Cl− and Na+ ions in more equal proportions. Ion removal can be rapid, with >50% removed within 1 h. These results were used to develop a process methodology, which will allow most seawater, brackish water, and saline flowback water to be desalinated to form usable irrigation water.

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“…Colloids produced solely from Fe n+ ions tend to have a particle size of <0.1 micron, while those also containing Ca and/or Al ions will tend to be >1 micron [42].…”

Section: Discussionmentioning

confidence: 99%

Desalination of Irrigation Water Using Metal Polymers

Antia¹

2022

Water

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“…Model aqueous solutions of iron and silicon salts were used in our experiments. Analytical-grade reagents FeSO 4 •7H 2 O, Na 2 SiO 3 •9H 2 O and distilled water were used to prepare the solutions [13]. Natural organic matter was obtained from the Institute of Peat (Tomsk, Russia).…”

Section: Methodsmentioning

confidence: 99%

Removal of Iron Colloid Substances from Aqueous Solutions Using Pulsed Corona Discharge

Gryaznova

Preis

Kornev

et al. 2016

KEM

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Pulsed electric discharge has been used for the removal of iron colloid substances from aqueous solutions. The residual concentration of organic substances in aqueous solution depends on the pulse repetition rate. The maximum decrease in organic substances concentration was observed at the pulse repetition rate of 800 pps. Comparison of the results obtained for iron colloid solutions containing humic substances and solutions of humic subtances with no colloids shows that the highest removal efficiency of organic substances was obtained when no iron and silicon ions were present in the solution. The results of our experiments suggest that pulsed electric discharge treatment for the removal of organic substances from natural waters is more efficient at an after-treatment stage, after precipitation of colloid substances.

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“…The use of a conventional groundwater treatment system in this case does not provide the required cleaning efficiency (Albrektiene, Rimeika, & Lubyte, 2011;Albrektiene, Rimeika, Zalieckiene, Saulys, & Zagorskis, 2012;Marsidi, complexes are regarded as the most stable. According to numerous researchers (Gonczarow et al, 2003;Sharma, 2001;Shiyan, Tropina, Machekhina, & Gryaznova, 2014;Khatri et al, 2017;Krupińska, 2017a), one of the reasons for iron stabilisation by organic substances in groundwater may also be formation of the so called protective colloids of hydrophilic character as a result of adsorption of organic substances on iron(III) hydroxide surface. Summing up, the conclusion may be clear that presence of organic substances, and especially humic substances in groundwater significantly impedes removal of iron.…”

Section: Introductionmentioning

confidence: 99%

Removal of Iron and Organic Substances From Groundwater in an Alkaline Medium

Krupińska

2019

Journal of Environmental Engineering and Landscape Management

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The article discusses the effectiveness of alkalinisation with calcium hydroxide or sodium hydroxide in the treatment of groundwater from Quaternary formations with an increased content of total iron (up to 6.82 mgFe/dm3) and organic substances (TOC up to 5.60 mgC/dm3). The aim of the research was to determine the effectiveness of the groundwater treatment, in particular, the removal of iron and organic substances in the sorption process and co-precipitation with calcium carbonate and magnesium hydroxide. The correction of the reaction was carried out with aqueous solutions of calcium hydroxide and sodium hydroxide in the pH range from 8.5 to 10.5. As the pH of the water increased, the efficiency of its treatment increased. The treatment results depended on the type of alkalizing reagent, especially in the case of removal of organic substances, reduction of colour and organic substances fixed in iron-organic complexes. Higher suitability of calcium hydroxide than sodium hydroxide in alkalinisation has been demonstrated. Calcium ions introduced into the treated water together with calcium hydroxide probably neutralized organic anions fixed in iron-organic complexes and determining colour and TOC, increasing their susceptibility to adsorption.

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Colloid stability of iron compounds in groundwater of Western Siberia

Cited by 9 publications

References 4 publications

Desalination of Irrigation Water Using Metal Polymers

Desalination of Irrigation Water Using Metal Polymers

Removal of Iron Colloid Substances from Aqueous Solutions Using Pulsed Corona Discharge

Removal of Iron and Organic Substances From Groundwater in an Alkaline Medium

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