机构:
Geol Survey Hokkaido, Environm & Geol Res Dept, Hokkaido Res Org, Kita Ku, Kita 19 Nishi11, Sapporo, Hokkaido 0600819, JapanGeol Survey Japan, Natl Inst Adv Ind Sci & Technol, Higashi 1-1-1, Tsukuba, Ibaraki 3058567, Japan
Norota, Susumu
[2
]
机构:
[1] Geol Survey Japan, Natl Inst Adv Ind Sci & Technol, Higashi 1-1-1, Tsukuba, Ibaraki 3058567, Japan
[2] Geol Survey Hokkaido, Environm & Geol Res Dept, Hokkaido Res Org, Kita Ku, Kita 19 Nishi11, Sapporo, Hokkaido 0600819, Japan
来源:
16TH INTERNATIONAL SYMPOSIUM ON WATER-ROCK INTERACTION (WRI-16) AND 13TH INTERNATIONAL SYMPOSIUM ON APPLIED ISOTOPE GEOCHEMISTRY (1ST IAGC INTERNATIONAL CONFERENCE)
|
2019年
/
98卷
关键词:
MATTER;
ASIA;
D O I:
10.1051/e3sconf/20199809010
中图分类号:
P3 [地球物理学];
P59 [地球化学];
学科分类号:
0708 ;
070902 ;
摘要:
The arsenic bound in holocellulose, a precursor of humic substances extracted from organic contaminated sediments, was investigated using XANES (x-ray adsorption near-edge structure) and EXAFS (extended x-ray absorption fine structure) with fluorescence mode. The most abundant arsenic bound in holocellulose was As-O in the first coordination sphere. Sulphur and carbon were also found in a neighbouring coordination shell around arsenic. The arsenic oxidation state was judged to be As (III) by As K edge XANES spectra as a shift to higher absorption edge energy with the increasing formal oxidation state. This arsenic speciation and bounding were well matched with biochemical mechanisms of arsenic absorption into plants.
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-ENVIRONMENTAL SCIENCE AND ENGINEERING & TOXIC AND HAZARDOUS SUBSTANCE CONTROL,
1981,
16
(01):
: 87
-
122