生态环境学报Issue(6)：1013-1021,9.DOI:10.16258/j.cnki.1674-5906.2015.06.016
大型垃圾焚烧厂周边土壤重金属含量水平、空间分布、来源及潜在生态风险评价
Environmental Levels, Spatial Distribution, Sources and Potential Ecological Risk of Heavy Metals in Soils Surrounding A Large Solid Waste Incinerator
摘要
Abstract
s:The contents of nine selected heavy metals (Cd, Pb, Hg, As, Cr, Cu, Ni, Zn, Co) were determined in the top soils surrounding a large municipal solid waste incinerator (MSWI) in the east of Pearl River Delta. Based on the analyses, the spatial distribution, possible sources and potential ecological risk of the metals were studied. The contents of Cd, Pb, Hg, As, Cr, Cu, Ni, Zn, Co in the top soils were (0.183±0.07) mg·kg-1, (34.8±18.7) mg·kg-1, (0.081±0.028) mg·kg-1, (11.5±9.1) mg·kg-1, (31.5±19.1) mg·kg-1, (17.6±12.3) mg·kg-1, (7.13±4.20) mg·kg-1, (82.4±44.2) mg·kg-1, (3.37±3.08) mg·kg-1, respectively. The mean contents of Hg and Zn were 1 and 2 times higher than their respective background values of Guangdong Province, respectively. Accompanied with Pearson's correlation, hierarchical cluster and principle component analysis, four groups of heavy metals with different spatial distribution were identified: Cr, Ni, Cu, Co originated from lithological sources, Pb, As, Zn were affected by both lithological and human sources (e.g. industrial, agricultural and traffic sources), Cd showed certain spatial correlation with the MSWI, and Hg was strongly related to the MSWI. The range of the potential ecological risk index (RI) of top soil is 51~269.79, of which 52.33% and 18.30% were from Hg and Cd, respectivley. The above results indicated that the unique pollution characteristics of Hg deserve serious attention in pollution monitoring in soils surrounding solid waste incinerator.关键词
重金属/汞/城市生活垃圾焚烧厂/土壤/空间分布/潜在生态风险评价Key words
heavy metals/mercury/MSW incinerator/soil/spatial distribution/potential ecological risk分类
资源环境引用本文复制引用
赵曦,黄艺,李娟,成功,宋丽红,陆克定,宁冲..大型垃圾焚烧厂周边土壤重金属含量水平、空间分布、来源及潜在生态风险评价[J].生态环境学报,2015,(6):1013-1021,9.基金项目
国家自然科学基金项目（41375124）；国家环境保护公益性行业科研专项（201309034）；深圳市人居环境委员会环境科研专项基金项目 （）
