Impact of temperature on the aging mechanisms of arsenic in soils: fractionation and bioaccessibility

被引：22
|
作者：
Huang, Guanxing [1 ,2 ]
Chen, Zongyu [1 ]
Wang, Jia [1 ]
Hou, Qinxuan [1 ]
Zhang, Ying [1 ]
机构：
[1] Chinese Acad Geol Sci, Inst Hydrogeol & Environm Geol, Shijiazhuang 050061, Peoples R China
[2] Hebei Key Lab Groundwater Remediat, Shijiazhuang 050061, Peoples R China
来源：
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2016年 / 23卷 / 05期
关键词：
Arsenic; Temperature; Aging mechanisms; Fractionation; Bioaccessibility; SEQUENTIAL EXTRACTION PROCEDURE; THERMODYNAMIC ASPECTS; FERRIC HYDROXIDE; ORGANIC-MATTER; HEAVY-METALS; ADSORPTION; SPECIATION; TIME; CRYSTALLIZATION; ATTENUATION;
D O I：
10.1007/s11356-015-5701-2
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The present study focused on the influence of temperature variation on the aging mechanisms of arsenic in soils. The results showed that higher temperature aggravated the decrease of more mobilizable fractions and the increase of less mobilizable or immobilizable fractions in soils over time. During the aging process, the redistribution of both carbonate-bound fraction and specifically sorbed and organic-bound fraction in soils occurred at various temperatures, and the higher temperature accelerated the redistribution of specifically sorbed and organic-bound fraction. The aging processes of arsenic in soils at different temperatures were characterized by several stages, and the aging processes were not complete within 180 days. Arsenic bioaccessibility in soils decreased significantly by the aging, and the decrease was intensified by the higher temperature. In terms of arsenic bioaccessibility, higher temperature accelerated the aging process of arsenic in soils remarkably.
引用
收藏
页码：4594 / 4601
页数：8
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