某市公路两侧土壤垂直剖面处重金属污染特征研究  

Study on the Characteristics of Heavy Metal Pollution in the Vertical Section of the Soil on Both Sides of the Highway in a City

作　　者：黄蕾 刘伟 杜伟伟[2] HUANG Lei;LIU Wei;DU Wei-wei(College of Chemical and Environmental Engineering,Xinjiang Institute of Engineering,Urumqi,Xinjiang 830091;College of Mathematics and Science,Xinjiang Institute of Engineering,Urumqi,Xinjiang 830091)

机构地区：[1]新疆工程学院化学与环境工程学院,新疆乌鲁木齐830091 [2]新疆工程学院数理学院,新疆乌鲁木齐830091

出　　处：《安徽农业科学》2021年第21期101-104,共4页Journal of Anhui Agricultural Sciences

基　　金：新疆工程学院科研基金项目(2020xgy172302)。

摘　　要：以某市公路两侧土壤垂直剖面处重金属Cu、Cr、Zn和Pb为研究对象,探讨其垂直分布特征;运用内梅罗指数评价重金属的污染指数;并根据重金属的形态含量结果分析其对土壤的污染程度;利用SPSS对重金属形态和理化性质进行Pearson相关分析,研究理化性质对重金属形态含量变化的影响。结果表明,剖面重金属含量主要累积在土壤表层,重金属含量随土壤深度的增加呈减少趋势;对剖面土壤产生影响的Zn来自机动车轮胎磨损;Zn以残渣态为主,含量占总量的98.60%,活性态含量较低,占总量的1.40%,对生物有效性和潜在危害性较小;可交换态随土壤pH、阳离子交换量和有机质含量的增加而降低,铁-锰氧化物结合态随土壤pH和阳离子交换量升高而增加,有机物结合态随土壤pH和有机质含量上升而递增,碳酸盐结合态仅随土壤pH增加而增大。Taking the heavy metals Cu,Cr,Zn and Pb in the vertical section of the soil on both sides of the highway in a certain city as the research object,the vertical distribution charactertics of heavy metals were discussed,the pollution index of heavy metals were evaluated by nemerow index method,and according to the results of the form content of heavy metals,the pollution degree was analyzed,Pearson correlation analysis on the morphology and physicochemical properties of heavy metals were made by SPSS to explore the influence of physicochemical properties on the changes in the morphology.The result showed that the heavy metal contents of the profile mainly accumulated in the soil surface,and the content of heavy metals showed a decreasing trend with the increase of soil depth.The Zn that affected the profile soil came from wear of motor vehicle tires.Zn was mainly in residual fraction,accounting for 98.60%of the total,and the content of active state was lower,accounting for 1.40%of the total,Zn had little bioavailability and potential harm.The exchangeable state decreases with the increase of soil pH,cation exchange capacity and organic matter content,iron-manganese oxidation state denoted a upward trend with the promotion in soil pH and cation exchange capacity,organically bound state was enhanced with soil pH and organic matter content,carbonate combined indicated an ascending trend with the soil pH.

关 键 词：重金属 土壤垂直剖面 污染指数 分布特征 相关分析 形态分析 

分 类 号：X53[环境科学与工程—环境工程]