添加硫代硫酸铵对植物修复汞污染土壤的影响
Effects of ammonium thiosulphate amendment on phytoremediation of mercury-polluted soil
查看参考文献26篇
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文摘
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由于汞污染土壤中汞的生物有效性非常低,限制了植物修复技术的应用.本试验通过室内盆栽模拟试验,研究了硫代硫酸铵添加到土壤后,对土壤中汞的生物有效性,印度芥菜生物量及其吸收土壤中汞的影响.结果表明,当硫代硫酸铵与土壤比例为1:12.5(W/W)时,土壤中生物有效态汞含量最高,达0.51mg·kg-1,是对照的12.7倍.土壤中加入2g·kg-1硫代硫酸铵时,印度芥菜根,茎和叶片干重分别增加了0.23,0.98和1.22g,且印度芥菜根系,茎和叶片的总汞含量分别达到1.96,0.43和3.35mg·kg-1,是对照组的8,4和2倍.添加硫代硫酸铵后,土壤渗滤液中汞浓度增加,最高达2487ng·L-1.因此,添加硫代硫酸铵能提高汞污染土壤植物修复效率,但也能在一定条件下导致汞向地下流失 |
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其他语种文摘
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The low bioavailability of mercury (Hg) in Hg-polluted soil limits the application of phytoremediation. In this paper,a greenhouse pot experiment was conducted to study the effects of ammonium thiosulphate amendment on the Hg-bioavailability in soil, the Indian mustard biomass, and the Hg uptake by the plant. When the amended ammonium thosulphate was 1/12.5 of soil (W/W), the concentration of soil bioavailable Hg was the highest (0.51 mg·kg-1),12.7 times of the control. When the ammonium thosulphate was amended at a rate of 2 g·kg-1, the dry weight of mustard root, stem, and leaf increased by 0.23,0.98, and 1.22 g, and the Hg concentration in the root, stem and leaf was 1.96,0.43, and 3.35 mg·kg-1, being 8,4, and 2 times of the control, respectively. Amendment of ammonium thiosulphate increased the leachate Hg concentration, with the maximum as high as 2487 ng·L-1. Therefore, the amendment of ammonium thiosulphate to Hg-contaminated soil could increase the efficiency of phytoremediation, but on certain conditions, could also cause Hg-leaching into underground |
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来源
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生态学杂志
,2010,29(10):1998-2002 【核心库】
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关键词
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硫代硫酸铵
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汞污染土壤
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植物修复
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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, 贵阳, 550002
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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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1000-4890 |
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学科
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水产、渔业 |
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基金
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国家863计划
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贵州省2007年度科学技术基金
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广西环境工程与保护评价重点实验室基金
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文献收藏号
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CSCD:4035776
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