A cost-effective system for in-situ geological arsenic adsorption from groundwater

Shan, Huimei; Ma, Teng; Wang, Yanxin; Zhao, Jie; Han, Hongyin; Deng, Yamin; He, Xiliang; Dong, Yanlong

doi:10.1016/j.jconhyd.2013.08.002

Cited by 21 publications

(12 citation statements)

References 16 publications

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“…Adsorption and ion exchange have been demonstrated in resource-constrained settings within household filters, community filters, and small water systems to remove numerous contaminants [e.g., As (14,(104)(105)(106)(107)(108)(109)(110), Cd (111), Cr (112)(113)(114), F (115), Pb (111,116), and EOCs ( 117)]. Subsurface-flow constructed systems (e.g., wetlands and wells injected with reactive media), reliant on in situ processes to adsorb or degrade contaminants, have been demonstrated at the pilot scale to successfully remove As, NO − 3 , U, and some EOCs [e.g., BTEX chemicals (benzene, toluene, ethylbenzene, and xylene), phenol] (118,119).…”

Section: Adsorption and Ion Exchangementioning

confidence: 99%

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Chemical Contamination of Drinking Water in Resource-Constrained Settings: Global Prevalence and Piloted Mitigation Strategies

Amrose

Cherukumilli

Wright

2020

Annu. Rev. Environ. Resour.

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Chemical contamination of drinking water (including salinity) puts more than one billion people at risk of adverse health effects globally. Resource-constrained communities are the most affected and face unique challenges that require innovative safe water solutions. This review focuses on arsenic, fluoride, nitrates, lead, chromium, total dissolved solids, emerging organic contaminants, and, to a lesser extent, manganese, cadmium, selenium, and uranium. It covers contaminant prevalence, major health effects, and treatment technologies or avoidance strategies that have been proven effective in realistic water matrices and conditions. The review covers the levelized costs of water for pilot- and full-scale systems most relevant to resource-constrained communities, with a focus on component costs including the costs of power systems, lifting water, waste management, and labor. These costs are not universally reported, but can be significant. The findings are analyzed and discussed in the context of providing sustainable safe water solutions in resource-constrained settings. Expected final online publication date for the Annual Review of Environment and Resources, Volume 45 is October 19, 2020. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Section: Adsorption and Ion Exchangementioning

confidence: 99%

“…The Supplemental Material includes a table summarizing each data point as well as parallel figures separated by individual contaminants. This figure was compiled from data in[95][96][97][98][99][100][101]104,[106][107][108][110][111][112][113][114][115][116][117]121,124,126,128,129,131,133,144,145,168,184,and 185.…”

mentioning

confidence: 99%

Chemical Contamination of Drinking Water in Resource-Constrained Settings: Global Prevalence and Piloted Mitigation Strategies

Amrose

Cherukumilli

Wright

2020

Annu. Rev. Environ. Resour.

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“…Arsenic removal methods have been intensively investigated since 1990s. Although precipitation [6], ion exchange [7,8], zero-valent iron [9,10], amorphous iron hydroxide [11], membrane separation [12], and filters [13,14] have been used for As removal, the adsorption of As from aqueous system has received more attention due to its high removal efficiency, low cost, and easy-to-recycle property [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Removal of Arsenic (III) from natural contaminated water using magnetic nanocomposite: kinetics and isotherm studies

et al. 2016

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“…Under oxidizing conditions, iron(III) (hydr)oxide minerals play a key role in the solid sequestration of contaminants such as arsenic in the natural environment as well as in treatment systems for removing arsenic from water (e.g., Smedley and Kinniburgh 2002;Datta et al 2009;Giles et al 2011;Omoregie et al 2013;Shan et al 2013). It is also well established that the iron (III)(hydr)oxide system is redox sensitive; one iron oxide transforming into another depending on various conditions such as pH, temperature, presence of ferrous ions, anions such as chloride, sulfate, and oxyanions such as arsenic (Liu et al 2005(Liu et al , 2008aPedersen et al 2005;Yee et al 2006;Mukiibi et al 2008;Das et al 2011aDas et al , 2011b.…”

Section: Introductionmentioning

confidence: 99%

Understanding abiotic ferrihydrite re-mineralization by ferrous ions

Raghav

Sáez

Ela

2014

Int. J. Environ. Sci. Technol.

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In this work, we study the abiotic re-mineralization of ferrihydrite under reducing conditions, obtained by adding zero-valent iron (ZVI) to a suspension of ferrihydrite particles. Under similar conditions, the system (ferrihydrite and ZVI) proceeded along two different transformation pathways differentiated by whether a magnetic stirrer or an overhead stirrer was used for mixing. X-ray diffraction characterization of the solid products showed that magnetite was the sole product of ferrihydrite transformation when a magnetic stirrer was used, whereas both goethite and magnetite were formed when an overhead stirrer was used. The system also behaved differently in terms of transformation kinetics and amount of magnetite formed. The quantification of magnetite generated was performed using a procedure developed in this study. The role of four mechanisms was investigated to explain these observed differences, namely-(1) presence/absence of high local Fe 2? concentrations, (2) mechanical abrasion, (3) presence/absence of a magnetic field, and (4) presence/ absence of a crystalline ZVI surface. Ferrous ions are expected to be concentrated near the magnetic bead on the magnetic stirrer as opposed to a more dispersed distribution with the overhead stirrer. This mechanistic study concluded that the presence of high local Fe 2? concentrations in the system leads to magnetite formation and the absence of the same leads to mixed goethite/magnetite or magnetite-free systems. These findings have significant implications for the mobilization of arsenic from iron (III) hydroxides as the conditions move from oxidizing to reducing, such as often occurs in engineered landfills and natural carbon-rich sediments.

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A cost-effective system for in-situ geological arsenic adsorption from groundwater

Cited by 21 publications

References 16 publications

Chemical Contamination of Drinking Water in Resource-Constrained Settings: Global Prevalence and Piloted Mitigation Strategies

Chemical Contamination of Drinking Water in Resource-Constrained Settings: Global Prevalence and Piloted Mitigation Strategies

Removal of Arsenic (III) from natural contaminated water using magnetic nanocomposite: kinetics and isotherm studies

Understanding abiotic ferrihydrite re-mineralization by ferrous ions

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