专论与综述
郭广慧,陈同斌,杨军,郑国砥,高定.中国城市污泥重金属区域分布特征及变化趋势[J].环境科学学报,2014,34(10):2455-2461
中国城市污泥重金属区域分布特征及变化趋势
- Regional distribution characteristics and variation of heavy metals in sewage sludge of China
- 关键词：城市污泥|重金属|区域特征|中国
- 基金项目：北京市博士后工作经费资助项目
- 作者
- 单位
- 郭广慧
- 北京中科博联环境工程有限公司,北京 100080
- 陈同斌
- 中国科学院地理科学与资源研究所环境修复中心,北京 100101
- 杨军
- 中国科学院地理科学与资源研究所环境修复中心,北京 100101
- 郑国砥
- 中国科学院地理科学与资源研究所环境修复中心,北京 100101
- 高定
- 中国科学院地理科学与资源研究所环境修复中心,北京 100101
- 摘要：通过整理和统计国内外文献(2006—2013年)报道的中国城市污泥重金属含量,分析了近年来中国城市污泥重金属的区域分布特征和变化趋势.结果表明,城市污泥重金属Cu、Pb、Zn、Cd、Hg、As、Cr和Ni含量分别为182.5、65.3、729.6、2.1、1.4、11.5、97.5和44.9 mg·kg-1,与《城镇污水处理厂污染物排放标准》(GB18918-2002)规定的中碱性土壤污泥农用污染物控制标准限值比较,Cu、Pb、Zn、Cd、Hg、As、Cr和Ni的超标率分别为2.3%、0、5.9%、5.5%、2.9%、 0、0和3.5%;与酸性土壤污泥农用污染物控制标准限值比较,Cu、Pb、Zn、Cd、Hg、As、Cr和Ni的超标率分别为7.1%、1.3%、10.3%、27.4%、20.0%、0、1.6%和12.1%.不同区域城市污泥重金属含量存在一定差异,城市污泥Hg和As在北方地区含量较高,而Cu、Pb、Zn、Cd、Cr和Ni在南方地区含量较高.与2006年城市污泥重金属含量相比,本研究城市污泥重金属Cu、Pb、Zn、Cd、Hg、As、Cr和Ni含量均呈下降趋势,降幅分别为29.0%、16.5%、40.9%、9.0%、29.8%、41.8%、5.3%和23.6%.
- Abstract：To identify the concentrations,variation trend and regional distribution characteristics of heavy metals in sewage sludge over China,litera-tures published from 2006 to 2013 about heavy metal concentrations in sewage sludge were reviewed.The results indicated that the concentrat-ions of Cu,Pb,Zn,Cd,Hg,As,Cr and Ni were 182.5,65.3,729.6,2.1,1.4,11.5,97.5 and 44.9 mg·kg-1,respectively.About 2.3%,5.9%,5.5%, 2.9% and 3.5% of the samples exceeded the limits set by "discharge standard of pollutants for municipal wastewater treatment plant" of China (GB18918—2002)for Cu,Zn,Cd,Hg,and Ni in alkaline soils,while the concentrations of Pb,Cr and As were considerably below the limits.Compared with the limits for Cu,Pb,Zn,Cd,Hg,As,Cr and Ni in acid soils,the non-attainment rate were 7.1%,1.3%,10.3%,27.4%,20.0%,0,1.6% and 12.1%,res-pectively.There were some differences of heavy metal concentrations in sewages sludge from different regions:the concentrations of Hg and As were higher in northern China,while higher concentrations of Cd,Cu,Pb,Zn,Cd,Cr and Ni were found in southern China.Compared with the results of heavy metals in sewage sludge taken from 2006,there were a significant decrease in the concentrations of heavy metals in this study,and the concentrations of Cu,Pb,Zn,Cd,Hg,As,Cr and Ni decreased by 29.0%,16.5%,40.9%,9.0%,29.8%,41.8%,5.3%,and 23.6%,respectively.
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