上海市典型区域非渗透下垫面沉积物的物化特征分析  

Physicochemical Characteristics Analysis of Impervious Underlying Surface Sediment in Shanghai

作　　者：王以尧[1,2] 杨扬 徐祖信[1] 

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]成都市环境工程评审中心,成都610000 [3]丹华水利环境技术(上海)有限公司,上海200032

出　　处：《四川环境》2016年第4期59-67,共9页Sichuan Environment

基　　金：国家重大专项水体污染控制与治理:城市排水系统溢流污染削减及径流调控技术研究(2013ZX07304002)

摘　　要：通过现场采样实验方法,研究了上海市典型区域内几类非渗透下垫面沉积物的重量分布和粒径分布特征,沉积物中污染物含量分布以及对应的粒级效应关系。结果表明,几类非渗透下垫面沉积物中值粒径平均值基本在100μm以上,马路下垫面中的粒径显著大于其他下垫面,在200μm以上。除马路下垫面外,随沉积物粒径增加,其重量组成百分比例逐渐下降。各下垫面沉积物累积重量和富集的污染物分布范围较广,人行道累积沉积物的单位重量显著大于其他下垫面,而不同污染物富集浓度在各下垫面间表现结果不一致,总体上广场下垫面和马路下垫面稍大于其他下垫面。综合分析认为,上海市各下垫面沉积物重量分布和污染物浓度分布与国内外较发达城市基本相当,其中TN、重金属Cd、Cu、Pb和Zn等指标污染程度较高。Studied by field sampling method, the weight distribution and particle size distribution of some kinds of impervious underlying surfaces, pollutant content distribution in sediments and the corresponding grade effect relationship were investigated in Shanghai urban center areas. The results showed that the average size of the median diameter of impervious underlying surfaces sediment was above 100μm, and the grain size of the road was more than 200μm and was significantly larger than other underlying surface. In addition to the underlying surface of the road, with the increase of sediment particle size, the percentage rate of weight gradually decreased. The cumulative weight distribution and contaminants concentration in sediment had a wide range, the sidewalk accumulated sediment weight was significantly greater than other underlying surface and different contaminants concentration on different utilization lands showed inconsistent results, but overall underlying surfaces of square and road were slightly larger than other underlying surfaces. It is concluded that deposited dust weights and contaminants concentration on different utilization lands were approximately similar to that in developed cities at home and abroad, and TN, Cd, Cu, Pb, Zn had a high pollution level.

关 键 词：非渗透下垫面 沉积物 物化特征 

分 类 号：X705[环境科学与工程—环境工程]