Biogeochemical reductive release of soil embedded arsenate around a crater area (Guandu) in northern Taiwan using X-ray absorption near-edge spectroscopy.
This study investigates biogeochemical reductive release of arsenate from beudantite into solution in a crater area in northern Taiwan, using a combination of X-ray absorption near-edge structure (XANES) and atomic absorption spectrometry. Total arsenic (As) concentrations in the soil were more than 200 mg/kg. Over four months of laboratory experiments, less than 0.8% As was released into solution after reduction experiments. The 71% to 83% As was chemically reduced into arsenite (As(III)) and partially weathering into the soluble phase. The kinetic dissolution and re-precipitation of As, Fe, Pb and sulfate in this area of paddy soils merits further study.
Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan, China. D96623002@ntu.edu.tw
Kai-Ying
KY
Chiang
Tsan-Yao
TY
Chen
Chih-Hao
CH
Lee
Tsang-Lang
TL
Lin
Ming-Kuang
MK
Wang
Ling-Yun
LY
Jang
Jyh-Fu
JF
Lee
D001149:Arsenates / Q000032:analysis*; D005843:Geography; D007854:Lead / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis; D010084:Oxidation-Reduction; D012987:Soil / Q000737:chemistry*; D013624:Taiwan; D056928:X-Ray Absorption Spectroscopy / Q000379:methods*
D001149:Arsenates; D009930:Organic Chemicals; D012987:Soil; D007854:Lead; C025657:arsenic acid