Effect of aging on the bioavailability and fractionation of arsenic in soils derived from five parent materials in a red soil region of Southern China

Environmental Pollution
Yanan WangCuixia Wu

Abstract

The effects of aging time and soil parent materials on the bioavailability and fractionations of arsenic (As) in five red soils were studied. The results indicated that As bioavailability in all soils decreased during aging, especially with a sharp decline occurring in the first 30 days. After aging for 360 days, the highest available As concentration, which accounted for 12.3% of the total, was observed in soils derived from purple sandy shale. While 2.67% was the lowest proportion of the available As in soils derived from quaternary red clay. Furthermore, the best fit of the available As changing with aging time was obtained using the pseudo-second-order model (R(2) = 0.939-0.998, P < 0.05). Notably, Al oxides played a more crucial role (R(2) = 0.89, P<0.05) than did Fe oxides in controlling the rate of As aging. The non-specially and specially absorbed As constituted the primary forms of available As.

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Citations

Apr 22, 2016·The Science of the Total Environment·Pamela Di TulloMaïté Bueno
Oct 28, 2019·Environmental Monitoring and Assessment·Hai-Bo WangShu-Yan Zang
May 23, 2020·Environmental Geochemistry and Health·Meisam Rastegari MehrZohreh Ghorbani
Apr 25, 2020·International Journal of Environmental Research and Public Health·Siyuan ZhangHongwei Liu
Mar 13, 2020·Environmental Pollution·Matheus Sampaio C BarretoLuís Reynaldo F Alleoni
Feb 3, 2021·Environmental Pollution·Xiayun ZangChangfeng Ding
Mar 21, 2021·The Science of the Total Environment·Quan-Ying WangNai-Wen Hu

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