| 抑制土壤汞进入陆生食物链 |
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| 引用本文： | 青长乐,牟树森.抑制土壤汞进入陆生食物链[J].环境科学学报,1995,15(2):148-155. |
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| 作者姓名： | 青长乐 牟树森 |
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| 作者单位： | 西南农业大学 |
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| 摘 要： | 土壤对Ｈｇ＾２＋有自净力，其作用实质是Ｈｇ的形态转化。本研究试验了膨润土，腐殖质，碳酸钙对汞形态转化的影响结果表明，膨润进使Ｈｇ＾２＋迅速向残留态转化而降低作物对汞的吸收，其效果在用量为０－４５０ｇ／ｋｇ范围呈线性增长；腐殖质使Ｈｇ＾２＋迅速向腐质态汞转化，且有与矿质粘粒争增Ｈｇ＾２＋之势，故最适用量因土壤粘粒含量而异。
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| 关 键 词： | 土壤 汞 形态 活性抑制 陆生食物链 |
| 收稿时间： | 1993/12/10 0:00:00 |
DEPRESSION OF SOIL MERCURY ENTERING TERRESTRIAL FOOD CHAIN |
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| Qing Changle and Mou Shusen.DEPRESSION OF SOIL MERCURY ENTERING TERRESTRIAL FOOD CHAIN[J].Acta Scientiae Circumstantiae,1995,15(2):148-155. |
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| Authors: | Qing Changle and Mou Shusen |
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| Institution: | Southwest Agricultural University, Chongqing 630716 and Southwest Agricultural University, Chongqing 630716 |
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| Abstract: | The influences of bentonite,humus and CaCO3 on transformation of mercury in soilwere investigated. The results showed that bentonite, humus, and CaCO3 are able to stimu-late the transformation of Hg from ion to other bonding forms and consequently depress ad-sorption of Hg by plant. Bentonite depressed the Hg adsorption linearly correlated with itscontent within a range of 0-450 g/kg.Humus competed with soil clay for Hg2+ and the re-lation of content-response correlated with clay content of the sample. CaCO3 was effective todepress plant Hg uptake from soil under certain conditions.The mechanism of CaCO3 issomewhat similar to that of bentonite. |
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| Keywords: | soil Hg activity depress terrestrial food chain |
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