长江口吴淞-浏河滨岸带沉积物AVS和SEM含量的空间分布特征  

Contents and spatial distributions of AVS and SEM in Wusong-Liuhe coastal sediments in Yangtze Estuary

作　　者：孙玮玮[1] 王东启[1,2] 陈振楼[1] 毕春娟[1] 胡蓓蓓[1,3] 刘耀龙[1] 李九发[4] 许世远[1] 

机构地区：[1]华东师范大学资源与环境科学学院,上海200062 [2]华东师范大学生命科学学院,上海200062 [3]天津师范大学城市与环境科学学院,天津300387 [4]华东师范大学河口海岸学国家重点实验室,上海200062

出　　处：《地球化学》2009年第2期140-146,共7页Geochimica

基　　金：国家自然科学基金(40730526);上海市海洋局908专项(HAD2);上海市"十一五"重大科技攻关项目(07DZ12037);中国博士后科学基金(20060400635)

摘　　要：对长江口吴淞-浏河滨岸带37个站位沉积物中酸可挥发性硫化物(AVS)和同时可提取态重金属(SEM)含量及其空间分布特征进行了研究。结果表明,SEM在37个站位沉积物中浓度范围为0.20～1.37μmol/g,平均值为0.74μmol/g;AVS的浓度范围为0.20～0.80μmol/g,平均值为0.23μmol/g;沉积物中AVS含量与总有机碳(TOC)和含水率呈显著正相关关系,而SEM分别与TOC和含水率呈显著正相关关系,与沉积物中值粒径呈显著负相关关系。依据SEM/AVS比值评价方法以及美国EPA(SEM-AVS)差值评价方法对沉积物中重金属的生物有效性的判断表明,除了B2站点无显著生物毒性外,吴淞-浏河滨岸带沉积物中重金属对水生生物均处于中等毒性水平。Acid volatile sulfides （AVS） and simultaneously extracted metals （SEM） of 57 surface sediments collected from Wusong-Liuhe coastal zone in the Yangtze Estuary were determined. The SEM contents of the surface sediments ranged from 0.20 μmol/g to 1.37μmol/g （dry weight）, with an average value of 0.74 μmol/g. The AVS contents varied between 0.20 -0. 80μmol/g （dry weight）, with an average being 0.23μmol/g. Sediment AVS has significant positive correlations with total organic carbon （TOC） and water content, and SEM has significant positive correlation with TOC and water content and negative correlation with medium particle size of the sediment. The ratio of SEM to AVS and the difference between SEM and AVS were used to assess the biological availability of sediment SEM content. The results show that most of the SEM in the surface sediments from the Wusong-Liuhe coastal zone in the Yangtze Estuary has moderate toxicity to the aquatic life.

关 键 词：酸可挥发性硫化物(AVS) 同时可提取态重金属(SEM) 生物有效性 沉积物 长江口 

分 类 号：P595[天文地球—地球化学] X142[天文地球—地质学]