文献类型：期刊文献

中文题名：不同工业企业周围土壤-作物系统重金属Pb、Cd的空间变异及其迁移规律

英文题名：SPATIAL VARIABILITY AND TRANSFER OF Pb AND Cd IN SOIL-CROP SYSTEM AROUND DIFFERENT TYPES OF FACTORIES

作者：严连香[1] 黄标[1] 邵学新[2] 赵永存[1] 孙维侠[1] 阮心玲[3]

第一作者：严连香

机构：[1]土壤与农业可持续发展国家重点实验室中国科学院南京土壤研究所,南京210008;[2]中国林业科学研究院亚热带林业研究所,浙江富阳311400;[3]河南大学环境与规划学院,河南开封475000

年份：2009

卷号：46

期号：1

起止页码：52-62

中文期刊名：土壤学报

外文期刊名：Acta Pedologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金项目(40773075)资助;国家重点基础研究发展规划(973)项目(2002CB410810)

语种：中文

中文关键词：重金属;土壤;作物;空间变异;迁移;排污模式

外文关键词：Heavy metal; Soil; Crops; Spatial variance; Transfer; Pollution mode

分类号：X53

摘要：对苏南不同排污方式的3个工业企业周围土壤-作物系统的重金属空间变异、迁移及影响因素进行了深入研究。研究表明:污水排放分别导致了氧化铅厂(F1)和化工厂(F2)周围农田土壤中Pb和Cd的聚集,其上作物的重金属吸收量也明显提高。而以大气排放为主的冶金企业(F3)导致土壤中重金属的轻微积累,也显著提高了作物中Pb的含量。在空间分布上,污水排放企业周围土壤和作物重金属的强烈聚集区出现在企业排污口附近约50m范围内,并随着距企业距离的增加重金属含量呈指数降低,高于土壤背景值的污染范围分别为400m(F1)和100m(F2)。进入土壤的Pb和Cd主要聚集在土壤表层0～20cm范围内。在企业污水灌溉的影响下,水稻Pb和土壤Pb、水稻Cd和土壤Cd均呈显著的指数关系;小麦Cd和土壤Cd呈显著的线性关系。当小麦和水稻Cd含量超过国家食品卫生标准(0.2mgkg-1)时,土壤中有效Cd含量分别为0.360mgkg-1和0.319mgkg-1,全Cd分别为1.50mgkg-1和1.42mgkg-1。而在大气污染的影响下,土壤-作物中的重金属无明显的相关性。
Study was carried out on spatial variability and transfer of heavy metals and their driving factors in cropsoil systems around three different types of factories in southern part of Jiangsu Province. Results show that wastewater irrigation led to Pb and Cd accumulation in soils around F1 （a lead oxide factory） and F2 （a chemical factory） , respectively, and concentrations of heavy metals in crops were also increased. Although F3 （ a metallurgical plant） did not cause any significant heavy metal accumulation in the soils around, its waste gas emission greatly raised Pb concentration in the crops. Spatially soils and plants high in heavy metal concentration were distributed maily within the radius of about 50 m from the waste water outlet, and decreased exponentially with the distance from the factory. Soil with heavy metal contents higher than the local soil background values were found within the radius of about 400 m （F1） and 100 m （F2）. In soil profile, Pb and Cd were accumulated mainly in 0 - 20 cm soil layer. Affected by wastewater irrigation, there were significant exponential relationship between Pb in rice and Pb in soil and between Cd in rice and Cd in soil, and significant linear relationship between Cd in wheat and Cd in soil. When soil available Cd and total Cd in the soil was 0. 319 mg kg^-1 and 1.42 mg kg^-1, respectively, Cd concentration in wheat would exceed the criterion of the national food safety standard （0.2 mg kg^-1 ） ; and when soil available Cd and total Cd in soil reached 0. 360 mg kg^-1 and 1.50 mg kg^-1 , respectively, Cd concentration in rice would exceed the criterion. Under the air pollution, no significant relationship was found between the heavy metal in crops and in soil.