上海市河网水体中As的分布特征及其生态风险评价Distribution Characteristics and Ecological Risk Assessment of As in Waters of Shanghai River Network
陶征楷;毕春娟;陈振楼;王骏;
摘要(Abstract):
2012年4月,在上海市河网采集表层水和沉积物样品各53个,测定其As含量,并采用潜在生态风险指数法对沉积物As的污染状况进行了评价。研究结果表明,上海市河网表层水和沉积物中As的含量分别为0.47~8.84μg·L-1和3.72~12.65μg·g-1,其中表层水中As的浓度处于中国地表水环境质量标准Ⅰ类水平,沉积物中As的浓度有15个样点超过了上海市土壤背景值,但均低于欧盟标准推荐值;表层水中As的浓度与pH呈显著正相关,说明pH值影响河水中As的迁移和转化;沉积物中As的浓度与总有机碳含量呈显著性正相关,说明沉积物中的As主要与总有机碳结合在一起;潜在生态风险评价结果显示,上海市河网沉积物中的As属于低生态风险。
关键词(KeyWords): 河网;表层水;沉积物;As;潜在生态风险
基金项目(Foundation): 国家自然科学基金(41271472);; 上海市自然科学基金(12ZR1409000);; 上海市科委社会发展重点项目(12231201900)
作者(Author): 陶征楷;毕春娟;陈振楼;王骏;
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