1
第37卷第3期 2010年6月
9
国
地
质
GEOLOGY IN CHINA
Vol.37,No.3 Jun.,2010
Techniques and methods of arsenic contaminated groundwater exploration intheHetaoplain of Inner
Mongolia, China
ToshiakiITO',FumioKANAI2,KazuroBANDO3
ResearchgroupforarseniccontaminationofgroundwaterinInnerMongoliat
AsiaArsenicNetworks,ResearchGroupforAppliedGeology
(1.KOKUSAIKOUGYO Co, Ltd, 2241, Harumichou, Fucyushi, , Tokyo 1830057 Japan;2.Kanai Consulting engineer office,235,Kouyoudai,Uchinadamachi,Kahokugun,Ishikawa,9200272, Japan;3.KOWA Co., Ltd., 61, Shinkou chou, Chuouku, Nigatashi, Nigata 9508565 Japan;4.c/o Kouichi TERASAKI, 637972, Igaras Ichinochou, Nishiku Nigatashi, Nigata 9502101, Japan;5.c/o Hidenori YOKOI, 296208, Tsurunoshima, Miyazakishi, Miyazaki 880
0014, Japan;6.c/o Kazuyuki SUENAGA, 11531202, Honchou, Asakashi, Saitama 3510011,Japan)
Abstract: In 1990, the chronic arsenicosis patients due to drinking contaminated groundwater were reported in the Hetac plain of Inner Mongolia, China. At present, it is estimated that more than 410,000 of inhabitants are damaged by arsenic poisoning in Inner Mongolia. We carried out hbydrogeological survey, geological survey, medical survey and installation of piped water supply systems for an 8-year period from 1997 to 2004. These surveys revealed the mechanism of the groundwater contamination by arsenic in the Hetao plain as follows: Fe-oxyhydroxide is dissolved by intensifying reducing condition in the aquifers as a result the adsorbed arsenic is released into groundwater. In order to prevent further increase of arsenicosis patients, it is important to stop ingesting contaminated water, and to supply safe drinking water. For that purposc we need to understand the mechanism of arsenic contamination based on geological and hydrogeological conditions of the field
Key words:arsenic;groundwater;contamination;Hetao plain;Inner Mongolia;China
Article ID: 1000-3657(2010)-03-0730-11
CLC number:P641.72
Article Character:A
Introduction
In the Hetao plain,natural higharsenic
groundwater has affected wells in 662 villages and more than 180,000 of peoples.We carried out hydrogeological and medical investigations to grasp the outline of arsenic contamination throughout the
Hetao plain and the details of the contamination at Wuyuan County of the central area of the plain.
2 Occurrence of the chronic arsenic poisoning
The first patient of chronic arsenic poisoning was reported in 1990 at theHetao plain.The groundwater
Received date;20100320; Revised date:20100410
Fundation item: This study was financially supported by the Environmental Restoration and Conservation Agency of Japan, The Toyota
Foundation, Tbe Nigata International Cooperation Friendship Fund, Tokyo Geographical Society
Biography: Toshiaki ITO, male, professor, bom in 1961, main study field: groundwater and geo-environment sciences
E-mail; toshiaki_ito@kkc.co.jp.
万方数据