开封市城市土壤剖面Hg、As和Sb分布特征分析

发布时间：2018-05-13 17:55

本文选题：开封市 + 城市土壤剖面　；参考：《环境化学》2017年05期

【摘要】：为了分析开封市不同土地利用类型下重金属Hg、As和Sb的积累状况及其垂直分布特征,采用氢化物发生-原子荧光光谱法测定了开封市55个城区土壤剖面和4个对照剖面共计303个土壤样品中,Hg、As和Sb的含量.结果表明:(1)城区土壤Hg、As和Sb含量明显高于对照土壤,城市土壤中Hg、As和Sb的平均含量分别为0.28、6.52、1.46 mg·kg~(-1).与中国潮土背景值相比,Hg和Sb受到了不同程度的污染;(2)由于成土母质组成、城市建设过程以及各种人为污染叠加的综合作用,开封市城市土壤中Hg、As和Sb的分布特征比较复杂,不同剖面重金属垂直分布特征变异较大;(3)城市不同土地利用类型下重金属含量存在显著差异,其中Hg在公共管理与服务用地和住宅用地上含量较高,As和Sb的高值区位于工矿仓储用地和交通运输用地.
[Abstract]:In order to analyze the accumulation and vertical distribution of heavy metals HgAs and SB under different land use types in Kaifeng city, The contents of HgAs and SB in 303 soil samples from 55 urban soil sections and 4 control sections of Kaifeng City were determined by hydride generation-atomic fluorescence spectrometry (HG-AFS). The results showed that the contents of HgAs and SB in urban soils were significantly higher than those in control soils. The average contents of HgAs and SB in urban soils were 0.28 ~ 6.52 mg / kg ~ (-1) ~ (-1) 路kg ~ (-1) ~ (-1), respectively. Compared with the background value of Chinese tidal soil, Hg and SB are polluted to different degrees.) the distribution characteristics of HgAs and SB in Kaifeng urban soil are more complicated because of the composition of the parent material, the process of urban construction and the comprehensive action of the superposition of various man-made pollution, so the distribution of HgAs and SB in the urban soil of Kaifeng is more complicated. The vertical distribution characteristics of heavy metals in different sections varied greatly.) there were significant differences in heavy metals contents among different land use types in cities. The high value areas of Hg in public management and service land and residential land are located in industrial and mining storage land and transportation land.
【作者单位】：河南大学资源与环境研究所;河南大学环境与规划学院;
【基金】：国家自然科学基金(41201211) 河南大学新兴交叉与特色学科培育项目(XXJC20140004)资助~~
【分类号】：X53

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