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陈宇宁,刘平辉,高金栋. 江西省南丰蜜桔土壤重金属特征评价及源解析[J]. 科学技术与工程, 2021, 21(19): 7965-7975.
Chen Yuning,Liu Pinghui,Gao Jindong.Evaluation and source analysis of heavy metals in the soil of orange in Nanfeng, Jiangxi Province[J].Science Technology and Engineering,2021,21(19):7965-7975.
江西省南丰蜜桔土壤重金属特征评价及源解析
Evaluation and source analysis of heavy metals in the soil of orange in Nanfeng, Jiangxi Province
投稿时间:2020-07-21  修订日期:2021-04-12
DOI:
中文关键词:  南丰蜜桔  土壤重金属  污染评价  空间分布特征  来源解析
英文关键词:Nanfeng mandarin oranges  soil heavy metals  pollution evaluation  spatial distribution characteristics  source analysis.
基金项目:国家自然科学基金资助项目(41261081)
        
作者单位
陈宇宁 东华理工大学
刘平辉 东华理工大学
高金栋 东华理工大学
摘要点击次数: 125
全文下载次数: 53
中文摘要:
      为了了解江西南丰蜜桔土壤环境条件,通过Excel、Arcgis软件、单因子污染、Nemerow综合污染和潜在生态风险分别对南丰蜜桔表层土壤中Cd、Cr、Hg、Pb、As、Cu、Zn、Ni等重金属的含量统计、空间分布、污染特征及来源进行了评价和分析。结果表明,南丰蜜桔表层土壤环境质量总体良好。表层土壤重金属Cd、Cr、Hg、Pb、As、Cu、Zn、Ni的均值为0.131mg/kg、30.062mg/kg、0.141mg/kg、37.380mg/kg、5.148mg/kg、27.880mg/kg、85.642mg/kg、14.605mg/kg。Cd、Hg、Pb、Cu和Zn均值含量高于江西省土壤背景值。所有重金属元素的平均值均未超过国家农用地土壤污染风险控制标准的筛选值。频率直方图显示Cd、Cu和Hg的分布呈右偏,而Cr、As、Hg、Pb、Zn和Ni的分布接近正态分布。土壤污染特征评价结果表明,Cr和Ni的单因子污染评价为安全范围;Cd、Hg、Pb、As、Cu和Zn均有不同程度的单因子污染,但总体污染程度较低。Nemerow综合污染指数显示,重度重金属污染主要集中在城区工业园区附近以及研究区的东北部和中南部。Cr、Pb、As、Cu、Zn和Ni的潜在生态风险评价(Ei)属于轻微生态风险,而Cd和Hg存在不同程度的潜在风险。综合潜在生态风险评价RI强风险和极强风险主要分布在城区工业园附近和中南部。Cd、Hg、As和Cu的空间分布相似,含量高值出现在城区工业园区附近;Pb、Zn和Ni的空间分布相似,含量高值出现在东南部,Cr的含量高值出现在东北部和东南部。根据Pearson相关矩阵、主成分分析和绝对主成分-多元线性回归分析表明,源1是自然源,Cr和Ni主要来自自然源,源2是工业活动源,Cd,Hg,As和Cu主要来自工业活动,源3是农业活动源,Pb和Zn主要来自农业活动,其他源主要是交通源,部分Pb来自交通源。
英文摘要:
      In order to understand the soil environmental conditions of Nanfeng orange, Excel, Arcgis, single factor pollution, Nemerow comprehensive pollution and potential ecological risk were used to evaluate and analyze the content statistics, spatial distribution, pollution characteristics and sources of heavy metals such As Cd, Cr, Hg, Pb, As, Cu, Zn and Ni in the surface soil of Nanfeng orange. The results showed that the surface soil quality of Nanfeng orange was generally good. The mean values of Cd, Cr, Hg, Pb, As, Cu, Zn and Ni in the surface soil were 0.131mg·kg-1, 30.062mg·kg-1, 0.141 mg·kg-1, 37.380 mg·kg-1, 5.148 mg·kg-1 27.880 mg·kg-1, 85.642 mg·kg-1 and 14.605 mg·kg-1. The mean contents of Cd, Hg, Pb, Cu and Zn were higher than the background values of jiangxi province. The average value of all heavy metal elements did not exceed the screening value of national soil pollution risk control standard for agricultural land. The frequency histogram shows that the distribution of Cd, Cu and Hg is skewed to the right, while the distribution of Cr, As, Hg, Pb, Zn and Ni is close to normal distribution. The evaluation results of soil pollution characteristics show that the single-factor pollution evaluation of Cr and Ni is the safe range. Cd, Hg, Pb, As, Cu and Zn all have different degrees of single-factor pollution, but the overall pollution degree is low. According to the Nemerow Composite pollution Index, heavy metal pollution is mainly concentrated in the vicinity of urban industrial zones and the northeast and south central of the study area. The potential ecological risk assessment (Ei) of Cr, Pb, As, Cu, Zn and Ni is a slight ecological risk, while Cd and Hg have different degrees of potential risk. The comprehensive potential ecological risk assessment RI strong risks and very strong risks are mainly distributed in the vicinity of industrial parks in urban areas and in the central and southern area. The spatial distribution of Cd, Hg, As and Cu is similar, and the high content value appears near the urban industrial park. The spatial distribution of Pb, Zn and Ni was similar, and the high content of Cr appeared in the northeast and southeast. According to Pearson correlation matrix, principal component analysis and multivariate linear regression analysis showed that the absolute principal component source 1 is a natural source, Cr and Ni mainly from natural source, the source 2 is the source of industrial activity, Cd, Hg, As and Cu come mainly from industrial activity, source 3 is the source of agricultural activities, Pb and zinc mainly from agricultural activities, other source mainly traffic source, part of the Pb from traffic source.
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