摘要
选择抚河南昌段水体中重金属污染较严重的抚河周边龙头山地区为研究区,于2021年6月共采集土壤样品16个,地表水及沉积物样品各5个,地下水样品4个,利用ICP-OES测试分析As、Cd、Cr、Cu、Ni、Pb、Zn等7种重(类)金属含量,采用反距离插值法研究土-水系统中重金属空间分布特征,进一步采用相关性分析和主成分分析进行重金属来源分析.结果表明,重金属主要集中在土壤和沉积物中,其含量普遍高于上地壳金属浓度(UCC),与其他流域相比处于同一数量级水平;空间离散程度均属于中等变异程度,整体空间分布特征表现为抚河沿岸的重金属含量明显高于其他地方;邻近土壤和沉积物中采样点间重金属具有显著的相关性,邻近土壤/沉积物和地表水/地下水间无显著相关性;重金属Cu、Cr、Pb、Ni、Zn主要来源于自然因素中的岩石风化,As主要来源于工业污染,Cd则来源于工农业复合污染.研究结果可为抚河流域土-水体系统中重金属来源分析和污染防治提供科学依据和理论支撑.
This study selected Longtoushan area around the Fuhe river where water body of Nanchang section was seriously polluted by heavy metals as the study area.A total of 16 soil samples,5 surface water samples,5 sediment samples and 4 groundwater samples were collected in June 2021.Contents of 7 heavy metal(loid)s(i.e.,As、Cd、Cr、Cu、Ni、Pb、Zn)were quantified by ICP-OES,and spatial distributions of these metal(loid)s in soil-water system were delineated with an inverse distance interpolation method.Possible sources of heavy metal(loid)s were investigated by correlation analysis and principal component analysis.Results showed that heavy metal(loid)s were accumulated in soil and sediments,and their contents were generally higher than the values of the upper crust metal concentration(UCC),although they were in the same order of magnitude compared with other basins.Spatially,heavy metal(loid)s showed significantly higher contents along the Fuhe River as compared to other locations with a moderate spatial dispersion degree.There was a significant indigenous correlation between different heavy metal(loid)s concentrations in adjacent soil and sediment samples,while no significant indigenous correlation between adjacent soil/sediment and surface water/groundwater samples were observed.Heavy metals including Cu,Cr,Pb,Ni,and Zn were mainly derived from weathering of natural rocks.As came from industrial practices,and Cd was sourced from industrial and agricultural compound activities.The results will provide scientific basis and theoretical support for source analysis,and prevention and management of heavy metal(loid)s pollution in natural soil-water systems of the Fuhe river.
作者
章艳红
喻成功
唐玉红
孙凯璇
时红
ZHANG Yanhong;YU Chenggong;TANG Yuhong;SUN Kaixuan;SHI Hong(State Key Laboratory of Nuclear Resources and Environment,School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang,330013,China;Jiangxi Central Station of Irrigation Experiment,Nanchang,330201,China)
出处
《环境化学》
CAS
CSCD
北大核心
2023年第6期1922-1932,共11页
Environmental Chemistry
基金
国家自然科学基金(42062017,42107093)
江西省水利厅科技项目(201820YBKT23)
江西省自然科学基金(20212BAB204002)
东华理工大学核资源与环境国家重点实验室开放基金(NRE1927)资助.
关键词
重金属
土-水系统
空间分布
来源分析
抚河
heavy metal
soil and water system
spatial distribution
source analysis
Fuhe River
