湖北恩施渔塘坝高硒土壤中硒的结合态
Fractionation of selenium in high-Se soils from Yutangba, Enshi, Hubei
查看参考文献16篇
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文摘
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湖北恩施渔塘坝是中国人群硒中毒爆发性流行的典型病区.使用改进的7步连续化学浸提技术.对渔塘坝土壤硒进行了水溶态、可交换态、有机态、元素态、酸性提取态、硫化物/硒化物态和残渣态硒的提取,并应用氢化物-原子荧光法测定了土壤总硒和各结合态硒.结果表明,渔塘坝高硒土壤中硒结合态分布基本可以分为4种类型,或以有机结合态硒为主,或以元素态硒为主,或是有机结合态和元素态硒为主,亦或是有机结合态和硫化物/硒化物硒为主,可交换态和元素态硒次之.上述硒的结合态分布特征说明,渔塘坝土壤硒来源或以人为引入硒为主,或以富硒碳质岩石的风化来源为主.渔塘坝旱地土壤中元素态硒(多以自然硒晶体形式出现)的普遍分布,揭示了人为来源硒的引入是导致田地土壤高硒的主要原因.也就是说,20世纪60年代初期,当地村民耕种田地的施肥方式是引入硒的主要途径. |
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其他语种文摘
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Yutangba is one of the typical high-Se areas in Enshi Prefecture in China,where a sudden incidence selenium poisoning occurred in 1963. Using a modified sequential chemical-extraction technique, seven operationally defined selenium fractions were determined in soils from Yutangba, which were defined as water-soluble, ligand-exchangeable, base-soluble, elemental, acetic acid-soluble, sulfide/selenide, and residue. Bulk selenium in soil and selenium concentration in each fraction were measured by hydride generator-atomic fluorescence spectrometry (HG-AFS). The results show that selenium fractions in soils from different locations of Yutangba can be divided into four types according to the dominant fractions of selenium, i.e. elemental, organic-bound, elemental plus organic-bound, and organic-bound and sulfide/selenide with some ligand-exchangeable and elemental Se. The distribution of selenium fractions indicates that the source of selenium in Yutangba soils is diverse, and could be introduced by local farmers via traditional cultivation methods, or supplied from the weathering processes of Se-rich carbonaceous rocks exposed in the north part of Yutangba. Because of the occurrence of native Se crystals in soils from different cropland sites, we propose that Se in cropland soil is mainly introduced by local villagers′ cultivation methods. Therefore, the source of the Se introduced in the 1960′s to Yutangba soils was mainly anthropogenic. |
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来源
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环境科学学报
,2008,28(4):772-777 【核心库】
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关键词
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硒结合态
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元素态硒
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硒来源
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高硒土壤
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渔塘坝
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地址
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
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湖北省恩施州卫生防疫站, 恩施, 445000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-2468 |
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学科
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环境污染及其防治 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:3243221
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参考文献 共
16
共1页
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|
1.
Fordyce F M. Soil grain and water chemistry in relation to human selenium-responsive disease in Enshi District China.
Appl Geochemistry,2000,15:117-132
|
CSCD被引
47
次
|
|
|
|
|
2.
Frankenberger W T.
Selenium in environment,1994:1-416
|
CSCD被引
5
次
|
|
|
|
|
3.
Kulp T R. Spociation and weathering of selenium in Upper Cretaceous chalk and shale from South Dakota and Wyoming USA.
Geochimica et Cosmochimica Acta,2004,68(18):3687-3701
|
CSCD被引
21
次
|
|
|
|
|
4.
Luo K L. Selenium source in the selenosis area of the Daba region,South Qinling Mountain,China.
Environmental Geology,2004,45(3):426-432
|
CSCD被引
18
次
|
|
|
|
|
5.
Martens D A. Selenium speciation of marine shales alluvial soils and evaporation basin soils of California.
J Environ Quality,1997,26:424-432
|
CSCD被引
11
次
|
|
|
|
|
6.
Tan J A. Selenium in soil and endemic diseases in China.
The Science of Total Environment,2002,284:227-235
|
CSCD被引
95
次
|
|
|
|
|
7.
Wang Z J. Biogeochemical cycling of selenium in Chinese environments.
Applied Geochemistry,2001,16:1345-1351
|
CSCD被引
67
次
|
|
|
|
|
8.
Zhu J M. Occurrence of native selenium in Yutangba and its environmental implications.
Applied Geochemistry,2004,19(3):461-467
|
CSCD被引
22
次
|
|
|
|
|
9.
Zhu J M. Distribution of selenium in mini-landscape of Yutangba Enshi Hnbei Province China.
Applied Geochemistry,2001,16:1333-1334
|
CSCD被引
24
次
|
|
|
|
|
10.
宋成祖. 鄂西南渔塘坝沉积性硒矿化区概况.
矿床地质,1989,8(3):83-88
|
CSCD被引
31
次
|
|
|
|
|
11.
杨光圻. 湖北恩施地区原因不明脱发脱甲症病因的研究.
中国医学科学院学报,1981,3(增刊):1-6
|
CSCD被引
29
次
|
|
|
|
|
12.
张光第. 湖北恩施地区硒地质地球化学环境背景.
地球学报,1998,19(1):59-7
|
CSCD被引
8
次
|
|
|
|
|
13.
郑宝山. 鄂西的硒资源及其开发战略研究.
自然资源学报,1993,8(3):204-212
|
CSCD被引
16
次
|
|
|
|
|
14.
朱建明. 恩施渔塘坝富硒碳质岩中硒的赋存状态.
地球化学,2004,33(6):634-640
|
CSCD被引
12
次
|
|
|
|
|
15.
朱建明. 湖北渔塘坝高硒环境中硒的分布、迁移和生物可利用性.
土壤学报,2005,42(5):835-843
|
CSCD被引
8
次
|
|
|
|
|
16.
朱建明. 恩施渔塘坝自然硒的发现及其初步研究.
地球化学,2001,30(3):236-241
|
CSCD被引
17
次
|
|
|
|
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