Arsenate Removal by Coagulation Using Iron Salts and Organic Polymers

Baskan, Meltem Bilici; Pala, Ayşegül; Türkman, Ayşen

doi:10.5053/ekoloji.2010.7410

Cited by 12 publications

(3 citation statements)

References 26 publications

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“…Drinking water contamination with arsenic has been one of the most important environmental and public health problems in many countries such as India, Bangladesh, China, Chile, Argentina, Mexico, Taiwan, Vietnam, and United States. − Regulatory agencies have published the maximum contaminant level (MCL) for arsenic in drinking water to protect human health. The World Health Organization (WHO), , U.S. Environmental Protection Agency (EPA), and Republic of Turkish Ministry of Health established an allowable limit of 10 μg/L. In some regions of Turkey, arsenic concentration is higher than the drinking water standards ranging from 10 to 7754 μg/L. , Altas et al determined arsenic concentration in 62 stations utilized as drinking water resources by the local community for Aksaray, Turkey, and arsenic concentrations were found to be ranging between 10 and 50 μg/L in 22 stations and >50 μg/L in 5 stations.…”

Section: Introductionmentioning

confidence: 99%

Arsenic Removal from Drinking Water Using Low Pressure Membranes

Elcik

Çakmakçı

Şahinkaya

et al. 2013

Ind. Eng. Chem. Res.

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Arsenic removal from drinking water using low-pressure membranes together with chemical oxidation and adsorption on ferric iron coagulates was deeply investigated. Hypochlorite or ozone was used to oxidize arsenite (100 or 1000 μg/L) and ferrous iron (0.5–20 mg/L) simultaneously. As(III) or As(V) rejection by ultrafiltration was negligible. Although partial As(III) rejection was possible in the presence of ferric iron, treated effluent did not meet the drinking water standards. Oxidation of As(III) and Fe(II) to As(V) and Fe(III), respectively, significantly increased arsenic rejection by low pressure membranes. Arsenic rejection performance depended on the type and concentration of oxidants used, concentration of Fe(II), and the type of membrane. In general, the hypochlorite + Fe(II) + membrane process gave much better performance compared with the ozone + Fe(II) + membrane process. All the membranes used in this study were effective to decrease arsenic concentration from 100 or 1000 μg/L to the target value (10 μg/L) in the presence of sufficient iron and oxidant concentrations. Hence, the flux values of different membranes should be considered for an economical point of view.

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Section: Introductionmentioning

confidence: 99%

Arsenic Removal from Drinking Water Using Low Pressure Membranes

Elcik

Çakmakçı

Şahinkaya

et al. 2013

Ind. Eng. Chem. Res.

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“…Hence, the purification of As(V) is essential, and the available methods are ion exchange (Kim & Benjamin, 2004), coagulation-flocculation (Başkan et al, 2010), membrane filtration (Uddin et al, 2007), reverse osmosis (Pawlak et al, 2006), and adsorption (Mou et al, 2012). Compared to the methods reported in the literature, the adsorption process is suitable, efficient, and low cost respectively (Hu et al, 2020;Liang et al, 2021;Liu et al, 2021b).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Mesoporous Cerium Oxide for Toxic As(v) Removal: Performance and Mechanistic Studie

Sahu

Mandal

Sahu

et al. 2022

Journal of Environmental Engineering and Landscape Management

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In the present work, the adsorption of carcinogenic pentavalent arsenic (As(V)) from an aqueous solution was studied using mesoporous cerium oxide (MCO). The MCO was synthesized in the precipitation process and confirmed by FT-IR, SEM-EDX, XRD, and BET instrumental techniques. Batch adsorption showed that 95% of As(V) was removed in the optimum conditions of 0.60 g/L adsorbent dose, 10 mg/L initial concentration, time 30 min, and pH 3. Pseudo-secondorder kinetics and the Langmuir isotherm model were fitted to the experimental data. The MCO had a high surface area of 191.97 m2/g and a maximum adsorption capacity of 58.25 mg/g at pH 3. MCO could be able to remove 88% and 82% in the first and second cycles after being desorbed with 0.1 M NaOH solution. The Zeta potential and FTIR studies suggested that electrostatic attraction and ligand exchange mechanisms were responsible for As(V) adsorption.

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“…Most environmental problems caused by arsenic are the result of arsenic mobilization under natural conditions and the human activity will intensify this process [1]. Arsenic contaminated water have significant potential to cause skin cancer, liver and kidney disease, vascular problems, and even lead to death with high arsenic concentrations (＞ 50 μg/L) [2]. As the threat of pollution by arsenic is growing up and also to protect the daily drinking water sources in Northwest of China, a series of researches are developed [3].…”

Section: Introductionmentioning

confidence: 99%

Study on Mn-Fe-LDH Material for Remediation of Arsenic Contaminated Water

Wang

Bian

2017

KEM

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Arsenical water pollution refers to the toxicity of arsenic. The form of trivalent arsenic has been seen as more toxic substances, which will be great improved by the manmade pollution. Compared with other technologies, adsorption is the main method of removal of arsenic pollution, for its higher efficiency and lower cost. Based on the adsorption theory and ion exchange method, the layered double hydroxides material containing ferric iron and manganese (Mn-Fe-LDH) was prepared to remove arsenic in this paper. We have designed some experiments for synthesis of this material. The reaction process and elemental compositions has been studied and the adsorption property of arsenic adsorption onto layered double hydroxides was verified through a series of experiments. Study shows that the Mn-Fe-LDH material can be used as a good adsorbent material for its high removal efficiency. The adsorption capacity of the Mn-Fe-LDH material is not affected by the interference of pH and Cl-/SO42- ion strength. It was a broad prospect for the development and application of arsenic removal materials.

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Arsenate Removal by Coagulation Using Iron Salts and Organic Polymers

Cited by 12 publications

References 26 publications

Arsenic Removal from Drinking Water Using Low Pressure Membranes

Arsenic Removal from Drinking Water Using Low Pressure Membranes

Preparation and Characterization of Mesoporous Cerium Oxide for Toxic As(v) Removal: Performance and Mechanistic Studie

Study on Mn-Fe-LDH Material for Remediation of Arsenic Contaminated Water

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