| 博斯腾湖沉积物中的酸可挥发性硫化物 |
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| 引用本文： | 李金城,王晓蓉.博斯腾湖沉积物中的酸可挥发性硫化物[J].环境科学与技术,2008,31(12). |
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| 作者姓名： | 李金城 王晓蓉 |
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| 作者单位： | 1. 桂林工学院资源与环境工程系,广西,桂林,541004
2. 南京大学污染控制与资源化国家重点实验室,江苏,南京,210093 |
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| 摘 要： | 沉积物中的酸可挥发性硫(AVS)易与二价金属结合生成难溶金属硫化物(MeS),进而制约二价有毒金属的化学活性和生物可利用性。通过测定AVS和同步提取金属(SEM),依据SEM/AVS的比值可判定沉积物中二价重金属的活性。文章对新疆博斯腾湖大、小湖区沉积物样品进行了分析,结果表明:AVS的含量受进水水质和人为活动影响较大,SEM的分布也有类似的分布特征。各采样点表层沉积物SEM/AVS比值均<1,说明沉积物中二价金属的化学活性和生物可利用性都较低。AVS的垂直分布随着深度的增加先降低后略有升高;SEM随深度的加深呈逐渐降低趋势。与太湖相关的研究结果对比发现,博斯腾湖AVS含量高于太湖五里湖区,而SEM低于太湖。
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| 关 键 词： | 沉积物 酸可挥发性硫化物 博斯腾湖 |
Acid Volatile Sulfide in Sediments of Bosten Lake |
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| LI Jin-cheng,WANG Xiao-rong.Acid Volatile Sulfide in Sediments of Bosten Lake[J].Environmental Science and Technology,2008,31(12). |
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| Authors: | LI Jin-cheng WANG Xiao-rong |
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| Institution: | LI Jin-cheng1,WANG Xiao-rong2 (1.Department of Resource , Environmental Engineering,Guilin Institute of Technology,Guilin 541004,China,2.State Key Laboratory of Pollution Control , Resource Reuse,Nanjing University,Nanjing 210093,China) |
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| Abstract: | Acid volatile sulfides(AVS) in sediments are available for binding with divalent cationic metals through formation of insoluble metal-sulfide complexes, thereby controlling metal bioavailability and subsequent toxicity to benthic biocommunities. AVS concentration and simultaneous extracted metals(SEM) values were determined to predict metal toxicity. From investigation of AVS and SEM in Bosten Lake, Xinjiang, it was found that SEM and AVS have the same characters. By comparing spatial distribution, it was f... |
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| Keywords: | sediment acid volatile sulfides (AVS) Bosten Lake |
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