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• W2945202348 endingPage "6854" @default.
• W2945202348 startingPage "6845" @default.
• W2945202348 abstract "Arsenic (As) release and mobility in groundwater is coupled to the iron (Fe) cycling and the associated transformation of Fe-oxides present in sediments. Recent in situ experiments have provided observations on arsenic mobilization and co-occurring reductive mineral transformation when placing As-loaded ferrihydrite-coated sand for 80 days in wells of an As-contaminated aquifer of Northern China. However, the complex temporal change in solid-associated arsenic and the multiple geochemical processes occurring when the flowing groundwater contacts the As-loaded ferrihydrite-coated sand hamper a detailed evaluation of the experimental data set. In this study, we develop a modeling approach that allows a quantitative interpretation of arsenic release and ferrihydrite transformation observed during the in situ experiments. The model accounts for the interplay of abiotic and biotic geochemical processes (i.e., surface complexation, reductive dissolution, formation of secondary iron minerals, and arsenic sequestration into the newly formed minerals) involved in the transformation of Fe-oxides and controlling arsenic mobility. The results show the capability of the proposed approach to reproduce the temporal trends of solid arsenic and ferrihydrite concentrations, as well as the spatial variability of mineral transformation, observed in different wells using a common set of surface complexation parameters and kinetic rate constants. The simulation outcomes allowed us to disentangle the specific contribution of the different mechanisms controlling the release of arsenic. It was possible to identify an initial rapid but minor release of As (13-23% of the initial surface concentration) due to desorption from ferrihydrite, as well as the reduction of adsorbed As(V) to As(III) upon contact with the flowing anoxic groundwater. Successively, reductive dissolution of ferrihydrite caused the decrease of the amount of the Fe mineral phase and led to a major depletion of solid-associated arsenic. The produced Fe(II) catalyzed the ferrihydrite conversion into more crystalline Fe(III) oxides (i.e., lepidocrocite and goethite) through Ostwald ripening, and resulted in the formation of siderite and mackinawite upon reaction with carbonates and sulfides naturally present in the groundwater. The model results also showed that, whereas the decrease in surface sites during reductive dissolution of ferrihydrite promoted arsenic mobilization, the mineral transformation limited As release through its sequestration into the newly formed secondary mineral phases." @default.
• W2945202348 created "2019-05-29" @default.
• W2945202348 creator A5030611214 @default.
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• W2945202348 creator A5064608500 @default.
• W2945202348 creator A5069056358 @default.
• W2945202348 date "2019-05-22" @default.
• W2945202348 modified "2023-10-16" @default.
• W2945202348 title "Model-Based Interpretation of Groundwater Arsenic Mobility during in Situ Reductive Transformation of Ferrihydrite" @default.
• W2945202348 cites W1486282819 @default.
• W2945202348 cites W1882669654 @default.
• W2945202348 cites W1883711153 @default.
• W2945202348 cites W1966325683 @default.
• W2945202348 cites W1966618741 @default.
• W2945202348 cites W1969609710 @default.
• W2945202348 cites W1970433028 @default.
• W2945202348 cites W1971501033 @default.
• W2945202348 cites W1973882055 @default.
• W2945202348 cites W1974912567 @default.
• W2945202348 cites W1981466452 @default.
• W2945202348 cites W1982222157 @default.
• W2945202348 cites W1994025773 @default.
• W2945202348 cites W1994799581 @default.
• W2945202348 cites W2003221509 @default.
• W2945202348 cites W2006223922 @default.
• W2945202348 cites W2008245367 @default.
• W2945202348 cites W2011087604 @default.
• W2945202348 cites W2016457559 @default.
• W2945202348 cites W2021219441 @default.
• W2945202348 cites W2022044418 @default.
• W2945202348 cites W2023896700 @default.
• W2945202348 cites W2026699540 @default.
• W2945202348 cites W2028492105 @default.
• W2945202348 cites W2028500255 @default.
• W2945202348 cites W2038567127 @default.
• W2945202348 cites W2039242149 @default.
• W2945202348 cites W2042380219 @default.
• W2945202348 cites W2042909506 @default.
• W2945202348 cites W2044781725 @default.
• W2945202348 cites W2045386224 @default.
• W2945202348 cites W2045594525 @default.
• W2945202348 cites W2045712334 @default.
• W2945202348 cites W2048752830 @default.
• W2945202348 cites W2050892975 @default.
• W2945202348 cites W2051076414 @default.
• W2945202348 cites W2053515269 @default.
• W2945202348 cites W2058608773 @default.
• W2945202348 cites W2059397738 @default.
• W2945202348 cites W2065151808 @default.
• W2945202348 cites W2070912856 @default.
• W2945202348 cites W2071704543 @default.
• W2945202348 cites W2078598942 @default.
• W2945202348 cites W2084640479 @default.
• W2945202348 cites W2089161264 @default.
• W2945202348 cites W2090349830 @default.
• W2945202348 cites W2091660974 @default.
• W2945202348 cites W2094123783 @default.
• W2945202348 cites W2097250497 @default.
• W2945202348 cites W2106651308 @default.
• W2945202348 cites W2111195136 @default.
• W2945202348 cites W2128742645 @default.
• W2945202348 cites W2134926177 @default.
• W2945202348 cites W2142169267 @default.
• W2945202348 cites W2149602337 @default.
• W2945202348 cites W2151092896 @default.
• W2945202348 cites W2157189858 @default.
• W2945202348 cites W2167437752 @default.
• W2945202348 cites W2168121572 @default.
• W2945202348 cites W2169031062 @default.
• W2945202348 cites W2254546906 @default.
• W2945202348 cites W2260430796 @default.
• W2945202348 cites W2320106949 @default.
• W2945202348 cites W2336406369 @default.
• W2945202348 cites W2477742435 @default.
• W2945202348 cites W2518983726 @default.
• W2945202348 cites W2521493102 @default.
• W2945202348 cites W2531303181 @default.
• W2945202348 cites W2612295736 @default.
• W2945202348 cites W2730567701 @default.
• W2945202348 cites W2767877123 @default.
• W2945202348 cites W2768913041 @default.
• W2945202348 cites W2796386502 @default.
• W2945202348 cites W2806538982 @default.
• W2945202348 cites W2884236133 @default.
• W2945202348 cites W2884283821 @default.
• W2945202348 cites W2884830142 @default.
• W2945202348 cites W2896193032 @default.
• W2945202348 cites W2898675539 @default.
• W2945202348 cites W2899720211 @default.
• W2945202348 cites W2911040030 @default.
• W2945202348 cites W4206232202 @default.
• W2945202348 cites W4255412919 @default.
• W2945202348 doi "https://doi.org/10.1021/acs.est.9b00527" @default.
• W2945202348 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31117535" @default.
• W2945202348 hasPublicationYear "2019" @default.
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• W2945202348 citedByCount "41" @default.

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