Lee, Sang-Hun Jung, Woosik Jeon, Byong-Hun Choi, Jae-Young Kim, Sunjoon 2024-01-20T18:01:34Z 2024-01-20T18:01:34Z 2021-09-02 2011-01 0269-4042 https://pubs.kist.re.kr/handle/201004/130787 Subsurface geochemical behavior of As(V) with Fe(II) was studied under strict anoxic conditions. Abiotic reduction of As(V) (0.1 mM) to As(III) by aqueous Fe(II) and sorbed Fe(II) in pH range 5.0-7.0 and Fe(II)(aq) concentration (0.6-1.2 mM) was investigated along with the effect of As(V) on the oxidation of Fe(II) by dissolved oxygen (DO). Although the reduction was thermodynamically feasible for homogeneous chemical conditions, practically no As(V) reduction by aqueous Fe(II) was observed. Similarly, no sorbed As(V) reduction was observed under the heterogeneous experimental conditions by sorbed Fe(II) onto synthetic iron oxide (hematite, alpha-Fe2O3). Experimental results on Fe(II) oxidation by DO in the presence of 0.1 mM As(V) showed a significantly slower Fe(II) oxidation, which might be due to the formation of Fe(II)-As(V) complex in the aqueous phase. The results of this study demonstrate that As(V) is relatively stable in the presence of Fe(II) under subsurface environment and interfere the oxidation of Fe(II). English SPRINGER ARSENIC CONTAMINATION DRINKING-WATER REDUCTION GROUNDWATER IRON OXIDATION SOLUBILITY SPECIATION KINETICS REMOVAL Abiotic subsurface behaviors of As(V) with Fe(II) Article 10.1007/s10653-010-9360-4 1 ENVIRONMENTAL GEOCHEMISTRY AND HEALTH, v.33, pp.13 - 22 ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 33 13 22 scie scopus 000285469500003 2-s2.0-78650309249 Engineering, Environmental Environmental Sciences Public, Environmental & Occupational Health Water Resources Engineering Environmental Sciences & Ecology Public, Environmental & Occupational Health Water Resources Article ARSENIC CONTAMINATION DRINKING-WATER REDUCTION GROUNDWATER IRON OXIDATION SOLUBILITY SPECIATION KINETICS REMOVAL Groundwater Ferrous Arsenate Abiotic reduction