我国典型化工污染地块土壤铬污染特征及区域差异  

POLLUTION CHARACTERISTICS AND REGIONAL DIFFERENCES OF CHROMIUM IN SOIL OF TYPICAL CHEMICAL POLLUTION PLOTS IN CHINA

作　　者：马妍[1] 张美娟[1] 韩聪 刘士清 严贝 于彩虹[1] 胡立凯 曹云者[3] MA Yan;ZHANG Mei-juan;HAN Cong;LIU Shi-qing;YAN Bei;YU Cai-hong;HU Li-kai;CAO Yun-zhe(College of Chemistry and Environmental Engineering,China University of Mining and Technology (Beijing),Beijing 100083,China;Binzhou Pollutant Discharge Total Control Office,Binzhou 256600,China;Chinese Research Academy of Environmental Sciences,Beijing 100012,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]滨州市污染物排放总量控制办公室,山东滨州256600 [3]中国环境科学研究院,北京100012

出　　处：《环境工程》2019年第9期177-181,170,共6页Environmental Engineering

基　　金：十三五国家重点研发计划项目(2016YFC0501108);国家自然基金项目(41701353);中央高校基本科研业务费专项基金(2016QH02)

摘　　要：选取我国5个分布在不同区域的化工污染地块土壤为研究对象,依据相关调查数据,对不同区域土壤中铬(Cr)的形态分布、价态分布和浸出特征进行研究。结果表明:土壤Cr形态分布与土壤有机质含量呈正相关,与土壤pH呈负相关;海北和牟定的土壤Cr主要以Cr(Ⅵ)形式存在,表现出高毒性、迁移性和环境风险,陆良、石家庄、山南土壤Cr主要以Cr(Ⅲ)形式存在;山南土壤浸出Cr(Ⅵ)和浸出TCr含量最低,土壤生物有效性和环境风险最低,污染程度相对较轻。The soil of five chemical pollution plots in different regions in China was selected as the research object.According to the relevant survey data, the morphological distribution, valence distribution and leaching characteristics of chromium in different soil regions were studied.The results showed that the distribution of chromium forms and valence distribution in the five chemically contaminated blocks had different characteristics.The distribution of soil chromium was positively correlated with soil organic matter content and negatively correlated with soil pH value.The chromium in soil in Haibei and Luding mainly existed in the form of Cr(Ⅵ), demonstrating high toxicity, mobility and environmental risks.The chromium in soils in Luliang, Shijiazhuang and Shannan mainly existed in the form of Cr(Ⅲ).The Shannan soil leached the lowest concentration of Cr(Ⅵ) and total chromium, indicating that its bioavailability and environmental risk were the lowest, and the pollution level was affected to a relatively lighter extent.

关 键 词：铬 土壤 污染地块 形态分布 价态分布 

分 类 号：X53[环境科学与工程—环境工程]