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Chromium speciation in mildly heated Cr(VI)-doped latosol soil

被引：2
|
作者：
Wei, Yu-Ling [1 ]
Hsieh, Hui-Fang [1 ]
Peng, Yen-Shiun [1 ]
Chen, Kai-Wen [1 ]
Lin, Chang-Yuan [1 ]
Wang, H. Paul [2 ,3 ]
机构：
[1] Tunghai Univ, Dept Environm Sci & Engn, Taichung 407, Taiwan
[2] Natl Cheng Kung Univ, Dept Environm Engn, Tainan 701, Taiwan
[3] Natl Cheng Kung Univ, Sustainable Environm Res Ctr, Tainan 701, Taiwan
来源：
JOURNAL OF SYNCHROTRON RADIATION | 2010年 / 17卷
关键词：
Cr XANES; Cr EXAFS; Cr(VI) chemical reduction; latosol; X-RAY-ABSORPTION; HEXAVALENT CHROMIUM; EDGE STRUCTURE; REDUCTION; XANES; SURFACE; REDOX; SPECTROSCOPY; MAGNETITE; MINERALS;
D O I：
10.1107/S0909049509051243
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Cr(VI) chemical reduction in natural organic matter (NOM)-bearing latosol soil was investigated under various heating conditions at <= 378 K. An enhanced Cr(VI) reduction rate has been observed for the reaction at 353-378 K. The effect of Fe(II) naturally occurring in the latosol soil on Cr(VI) chemical reduction is negligible compared with the effect of NOM. Cr(OH)(3) was quantitatively specified by X-ray absorption spectroscopy to be the key chromium species (similar to 80%) after similar to 90% of Cr(VI) was chemically reduced by NOM at 353-378 K. This study indicates a potential strategy for using the heat extracted from industrial flue gas with a heat exchanger to chemically reduce Cr(VI) in NOM-bearing or organics-amended soils that contain Cr(VI).
引用
收藏
页码：173 / 178
页数：6
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