成都市区、城郊和农村生活垃圾重金属污染特性及来源  

Characteristics and sources of heavy metal pollution in urban,suburban and rural domestic waste of Chengdu,China

作　　者：银燕春 王莉淋[1] 肖鸿[1] 李远伟[1] 彭宏[1] 漆辉[1] 邓仕槐[1] 

机构地区：[1]四川农业大学资源环境学院四川省农业环境工程重点实验室,成都611130

出　　处：《环境工程学报》2015年第1期392-400,共9页Chinese Journal of Environmental Engineering

基　　金：四川省教育厅青年项目(13ZB0291);教育部长江学者和创新团队发展计划项目(IRT13083)

摘　　要：以快速发展的城郊地区为切入点,研究了成都市区、城郊和农村三区冬夏两季生活垃圾的物理组成、重金属污染特性和来源。研究发现,成都地区生活垃圾重金属浓度普遍高于当地土壤背景值,且呈现出夏季高于冬季的趋势。无论冬夏,三区垃圾中最主要的污染重金属均为Se(0.3~1.1 mg/kg)、Cd(0.3~0.9 mg/kg)和Cu(24.9~152.6 mg/kg),而其他重金属污染物如Pb、Hg和Cr在三区垃圾中的污染强弱顺序差异较大。通过Pearson相关性分析以及测定垃圾主成分中重金属浓度来研究重金属污染物的来源,结果显示:三区生活垃圾中Cd主要源于餐厨、尘土和塑料,Se可能源于废弃的电子产品,Cu和Zn源于尘土和包装纸;市区垃圾中的Pb主要源于尘土、塑料和包装纸;城郊垃圾中Cr、Se的主要源于尘土,而Hg主要来源于餐厨和尘土。By taking rapidly developing suburban area as an entry point,this study investigated the physical components,the characteristics and sources of heavy metal pollutions in urban,suburban and rural domestic waste of Chengdu both in summer and winter. It is found that most of the heavy metal concentrations in the domestic wastes of Chengdu are above local soil environmental background values and are greater in summer than in winter. Whether in summer or in winter,Se( 0. 3 ~ 1. 1 mg / kg),Cd( 0. 3 ~ 0. 9 mg / kg) and Cu( 24. 9 ~ 152. 6mg / kg) are the most importan theavy metal pollutants in urban,suburban and rural domestic waste; while other pollutants such as Pb,Hg and Cr are of different polluting strength in the three areas. The sources of heavy metals in domestic wastes were explored by Pearson correlation analysis and the measurement of heavy metal concentrations in main physical components of domestic wastes. The result shows that Cd is mainly from kitchen waste,dust and plastic; Se maycome from electronic wastes; Cu and Zn come from dust and packing paper; Pb in urban domestic wastes is mainly from dust,plastic and packing paper; Cr and Se in suburban domestic wastes are mainly from dust and Hg is mainly from kitchen waste and dust.

关 键 词：成都城郊 生活垃圾 重金属污染 

分 类 号：X799.3[环境科学与工程—环境工程]