Characterization of subsurface sediments and its implication on arsenic mobilization in Gangetic plain

被引：0
|
作者：
Kar, S. [1 ]
Jean, J. -S. [1 ]
Liu, C. -C. [1 ]
Maity, J. P. [2 ]
Nath, B. [3 ]
Lee, J. -F. [4 ]
机构：
[1] Natl Cheng Kung Univ, Dept Earth Sci, Tainan, Taiwan
[2] Natl Chung Cheng Univ, Dept Earth & Environm Sci, Chiayi, Taiwan
[3] Univ Sydney, Sch Geosci, Sydney, NSW, Australia
[4] Natl Synchrotron Radiat Ctr, Hsinchu, Taiwan
来源：
UNDERSTANDING THE GEOLOGICAL AND MEDICAL INTERFACE OF ARSENIC, AS 2012 | 2012年
关键词：
WEST-BENGAL; AQUIFERS;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Geochemical analysis of core sediments from Barasat, India, a part of the Gangetic plain was conducted. High arsenic content was observed in shallow depth (<70 m). Sequential extraction study revealed association of arsenic with different solid phases in sediment. XRD analysis demonstrated that iron oxides/oxyhydroxides with residual magnetite and chlorite, illite and iron oxide/oxyhydroxide-coated quartz, feldspar are the dominant carriers of arsenic as evidenced by EDS spectra. XANES and EXAFS analysis indicated the dominance of As(III) and Fe(III) implying iron oxides/oxyhydroxides as the main carrier of As in the sediments.
引用
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页码：93 / 95
页数：3
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