摘要
对北京市的12个公园进行表层、深层土壤样品的重金属Cu、Pb含量分析,并对其中10个公园的表层、深层土壤样品进行Cu、Pb的化学形态分析。研究结果表明:北京市部分公园的深层土壤已在某种程度上受到人为扰动,大多数公园表层土壤中存在着一定的Cu、Pb含量积累现象,总体上市区公园比郊区公园明显。公园表层、深层土壤中Cu形态分布的总体规律均为残渣晶格态>有机结合态>铁锰氧化物结合态>碳酸盐结合态>可交换态,表层、深层土壤中Pb形态分布的总体规律均为残渣晶格态>铁锰氧化物结合态>有机结合态>碳酸盐结合态>可交换态,但表层土壤中活性态Cu、Pb的平均比例较深层土壤均有所上升,部分市区公园表层土壤中Cu、Pb的含量较高且活性态比例较大,具有一定的释放潜力和生物有效性。
Concentrations and chemical speciation of heavy metals including Cu and Pb in top and deep soils collected from parks in Beijing was studied.Results indicated that the deep soils of some parks were disturbed.Concentrations of Cu and Pb in top soils of most parks were accumulated,and which in urban areas were higher than in suburb areas in general,with high concentrations and proportion of active fraction of Cu and Pb in top soils of some urban parks.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2006年第3期31-32,37,共3页
Environmental Science & Technology
关键词
土壤
铜
铅
含量
化学形态
北京公园
soil
copper
lead
content
chemical speciation
Beijing parks