底泥疏浚对温州市牛桥底河底泥性质的影响分析  

Impact of dredging on sediment quality of Niuqiaodi River in Wenzhou

作　　者：童敏[1,2] 李文超[1] 黄民生[1] 何岩[1] 曹承进[1] 

机构地区：[1]华东师范大学生态与环境科学学院,上海200062 [2]上海宝钢新型建材科技有限公司,上海201900

出　　处：《华东师范大学学报（自然科学版）》2015年第2期67-74,90,共9页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金(51278192;41101471;41001347);中央高校基本科研业务费专项资金;上海市优秀学科带头人计划资助项目(11XD1402100);上海市科委重大项目(12231201900)

摘　　要：以温州市牛桥底河为研究对象,对河道疏浚前、中、后底泥中理化指标、重金属含量进行跟踪分析,并应用地累积指数法和潜在生态风险指数法对重金属元素Cd、Cr、Cu、Zn、Mn、Ni、Pb、Hg、As进行污染评价.结果表明,牛桥底河底泥疏浚工程实施后,表层底泥的TP、TOC和重金属含量呈现＂先降低、后升高＂的变化趋势,疏浚后1到3个月内底泥重金属含量最低.虽然疏浚工程可以暂时地显著削减河道中污染物的总量,但其对河道水质和底泥的改善效果仅能维持3~9个月.两种评价方法均表明疏浚工程的实施在一定程度上减轻了牛桥底河底泥的污染水平和生态风险.The physicochemical factors and heavy metals in sediment before,during and after dredging of Niuqiaodi River in Wenzhou were investigated.The result showed that after the sediment dredging of Niuqiaodi River,the contents of TP,TOC and heavy metal in sediment were firstly decreased and then increased.The heavy metal contents in sediment reached the lowest level in one to three months after dredging.The contents of the pollutants in the river were significantly reduced after sediment dredging,but the improvement of water quality and sediment only lasts three to nine months.The evaluation results of the geoaccumulation index（Igeo）and the potential ecological risk evaluation indicated the sediments of Niuqiaodi River were seriouslypolluted by heavy metals and the sediment dredging contributed to reduction of pollution levels of heavy metals in sediment.

关 键 词：疏浚 牛桥底河 底泥 重金属 污染评价 

分 类 号：X522[环境科学与工程—环境工程]