| 太湖五里湖区表层沉积物中酸挥发性硫化物和同步提取金属 |
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| 引用本文： | 李金城,宋进喜,王晓蓉.太湖五里湖区表层沉积物中酸挥发性硫化物和同步提取金属[J].湖泊科学,2004,16(1):78-81. |
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| 作者姓名： | 李金城 宋进喜 王晓蓉 |
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| 作者单位： | 南京大学污染控制与资源化国家重点实验室,南京,210093;南京大学污染控制与资源化国家重点实验室,南京,210093;西北大学环境科学系,西安,710069 |
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| 基金项目： | 国家自然科学基金项目(20177007)，教育部科技重点项目(03079) |
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| 摘 要： | 湖泊底泥中的酸溶硫化物易与二价金属生成难溶金属硫化物,从而制约沉积物中二价有毒金属的化学活性以及生物有效性,进而影响沉积物的环境质量.对沉积物中的酸溶硫化物(AVS)和同步提取金属(SEM)进行测定,依据SEM/AVS的比值可以判定重金属生物有效性.通过对太湖五里湖、梅梁湾表层沉积物夏季和秋季AVS与SEM的采样分析,结果表明:研究区域内AVS的含量夏季高于秋季,SEM受季节影响很小,SEM/AVS大于1,且秋季高于夏季,初步判断该湖区沉积物中重金属具有潜在的生物毒性.
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| 关 键 词： | 酸溶硫化物 同步提取金属 底泥 太湖 五里湖 |
| 收稿时间： | 4/2/2003 12:00:00 AM |
| 修稿时间： | 2003年4月2日 |
Acid Volatile Sulfides and Simmltaneous Extracted Metals in the Surficial Sediments of Wuli Lake, Lake Taihu |
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| LI Jincheng,SONG Jinxi and WANG Xiaorong.Acid Volatile Sulfides and Simmltaneous Extracted Metals in the Surficial Sediments of Wuli Lake, Lake Taihu[J].Journal of Lake Science,2004,16(1):78-81. |
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| Authors: | LI Jincheng SONG Jinxi and WANG Xiaorong |
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| Institution: | LI Jincheng 1,SONG Jinxi 1,2 &WANG Xiaorong 1 |
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| Abstract: | Acid volatile sulfides(AVS)in surficial sediments from Wuli lake,Lake Taihu,2002are available for binding with divalent cationic metals through the formation of insoluble metal-sulfide complexes,thereby controlling the metal bioavailability and subsequent toxicity to benthic biocommunities.AVS concentrations and simultaneous extracted metals(SEM)values are determined have become the major research topic asso-ciated with sediments.The ratio of SEM to AVS is promising to predict metal toxicity.From investigated AVS and SEM during summer and autumn at five locations of Lake Taihu,it was found that SEM-AVS values and AVS concentrations did vary significantly between locations during both seasons.AVS concentra-tions were greater during summer than spring;SEM concentrations did not significantly vary between seasons at the same location,which resulting in significantly lower SEM-AVS values in summer.SEM-AVS values were greater than one at each location during both seasons illustrated there might exist heavy metals toxicity in Lake Taihu sediments. |
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| Keywords: | Acid volatile sulfides simultaneous extracted metals sediment Lake Taihu |
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