Immobilization and release risk of arsenic associated with partitioning and reactivity of iron oxide minerals in paddy soils
Immobilization and release risk of arsenic associated with partitioning and reactivity of iron oxide minerals in paddy soils
复制标题
与稻田土壤中氧化铁矿物的分配和反应性相关的砷的固定和释放风险
DOI：
10.1007/s11356-020-09480-y
复制
发表时间：
2020-06
影响因子：
5.8
通讯作者：
Li Yongtao
中科院分区：
文献类型：
--
作者：
Ouyang Xiaoxue;Ma Jie;Weng Liping;Chen Yali;Wei Rongfei;Zhao Junying;Ren Zongling;Peng Hao;Liao Zhongbin;Li Yongtao
The consumption of agricultural products grown on paddy soils contaminated with toxic element has a detrimental effect on human health. However, the processes and mechanisms of iron (Fe) mineral-associated arsenic (As) availability and As reactivity in different paddy soil profiles are not well understood. In this study, the fractions, immobilization, and release risk of As in eleven soil profiles from the Changzhutan urban agglomeration in China were investigated; these studied soils were markedly contaminated with As. Sequential extraction experiments were used to analyze fractions of As and Fe oxide minerals, and kinetic experiments were used to characterize the reactivity of Fe oxide minerals. The results showed that concentrations of total As and As fractions had a downward trend with depth, but the average proportions of As fractions only showed relatively small changes, which implied that the decrease in the total As concentrations influenced the changes in fraction concentrations along the sampling depth. Moreover, we found that easily reducible Fe (Feox1) mainly controlled the reductive dissolution of the Fe oxides, which suggest that the reductive dissolution process could potentially release As during the flooded period of rice production. In addition, a high proportion of As was specifically absorbed As (As-F2) (average 20.4%) in paddy soils, higher than that in other soils. The total organic carbon (TOC) content had a positive correlation with the amount of non-specifically bound As (As-F1) (R= 0.56), which means that TOC was one factor that affected the As extractability in the As-F1. Consequently, high inputs of organic fertilizers may elevate the release of As and accelerate the diffusion of As.Graphical abstract
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影响因子：
3.4
作者：
Andrew N. Quicksall;B. Bostick;M. Sampson
通讯作者：
Andrew N. Quicksall;B. Bostick;M. Sampson
DOI：
10.2307/2256424
发表时间：
2019-11
期刊：
Dictionary of Geotourism
影响因子：
--
作者：
G. Leeper;N. Uren;R. Bryant
通讯作者：
G. Leeper;N. Uren;R. Bryant
DOI：
--
发表时间：
2015-12
期刊：
--
影响因子：
--
作者：
Oswer;Orcr;Mrwmd
通讯作者：
Oswer;Orcr;Mrwmd
影响因子：
64.8
作者：
Sarah Marshall;Andrew Dutterer;David R Montgomery
通讯作者：
Sarah Marshall;Andrew Dutterer;David R Montgomery
影响因子：
2.5
作者：
S. Datta;R. Rattan;K. Suribabu;S. Datta
通讯作者：
S. Datta;R. Rattan;K. Suribabu;S. Datta