张慧,马鑫鹏,苏航,隋虹均,史晓磊,李昕阳,杨欢,郑志志.松嫩平原黑龙江省南部土壤重金属背景值及污染程度分析[J].干旱地区农业研究,2018,36(6):230~236
松嫩平原黑龙江省南部土壤重金属背景值及污染程度分析
Soil heavy metal background values and pollution degree in southern Songnen Plain of Heilongjiang Province
  
DOI:10.7606/j.issn.1000-7601.2018.06.34
中文关键词:  重金属;背景值;土壤污染  松嫩平原
英文关键词:heavy metals  background levels  soil pollution  Songnen Plain
基金项目:黑龙江省博士后基金项目(LBH-Z12032)
作者单位
张慧 东北农业大学资源与环境学院哈尔滨 150030 
马鑫鹏 东北农业大学资源与环境学院哈尔滨 150030 
苏航 东北农业大学资源与环境学院哈尔滨 150030 
隋虹均 东北农业大学资源与环境学院哈尔滨 150030 
史晓磊 东北农业大学资源与环境学院哈尔滨 150030 
李昕阳 东北农业大学资源与环境学院哈尔滨 150030 
杨欢 东北农业大学资源与环境学院哈尔滨 150030 
郑志志 东北农业大学资源与环境学院哈尔滨 150030 
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中文摘要:
      以松嫩平原黑龙江省南部作为研究区,以多目标区域地球化学调查成果作为数据基础,采用置信区间法、累积频率法、迭代剔除法、普通克里金插值法、地累积指数法等方法研究土壤重金属背景值及污染程度。研究结果表明:松嫩平原黑龙江省南部土壤重金属As、Hg、Cd、Cr、Cu、Ni、Pb、Zn的背景值分别为9.33、0.016、0.079、50.82、18.74、24.16、22.70、57.34(mg·kg-1)。普通克里金插值的结果表明:深层土壤重金属As、Cd、Cr、Cu、Ni、Zn在研究区的分布相对一致,呈现出东北高西南低的空间分布格局,重金属Hg、Pb在研究区分布相对较为均匀。以确定的松嫩平原黑龙江省南部土壤重金属背景值作为评价标准,采用地累积指数法对表层土壤重金属污染程度进行分析,结果表明重金属As、Hg、Cd、Cr、Cu、Ni、Pb、Zn处于无污染程度的样本数量分别占总样本数量的97.72%、59.92%、83.45%、97.63%、99.24%、98.86%、99.02%、99.26%,从总体上看,研究区土壤是相对清洁的,但在小范围区域内略微存在中等程度的Hg、Cd污染。
英文摘要:
      Songnen Plain is one of the important commodity grain production regions in China. It is of great practical significance for the agricultural production, food security, and soil protection in the Songnen Plain to determine the heavy metal background level in soil and better understand the soil pollution. In this paper, we took the southern part of Songnen Plain in Heilongjiang Province as the research area with the data of regional multi-objective geochemical survey, employed confidence interval method, cumulative frequency method, iterative elimination method, and ordinary Kriging interpolation method to determine the heavy metal (As, Hg, Cd, Cr, Cu, Ni, Pb, and Zn) background levels in soil and its spatial distribution in the region. We also used cumulative index method to determine the pollution degree of heavy metals. The results showed that, the background levels of As, Hg, Cd, Cr, Cu, Ni, Pb, and Zn, in the southern part of Songnen Plain in Heilongjiang Province were 9.330, 0.016, 0.079, 50.817, 18.741, 24.159, 22.702, and 57.339 mg·kg-1, respectively. The results from ordinary Kriging interpolation indicated that the distributions of As, Cd, Cr, Cu, Ni, and Zn in the deep soil were relatively consistent, a spatial distribution pattern of high in southwestern and low in southwestern parts, and a relatively uniform distribution of Hg and Pb in the study area. The heavy metal background levels in soil in the southern Songnen Plain of Heilongjiang were used as the evaluation standard, and the degree of heavy metal pollution in the surface soil was analyzed by the cumulative index method. It is showed that number of samples with less than standard levels (defined as uncontaminated) of As, Hg, Cd, Cr, Cu, Ni, Pb, and Zn were 97.72%, 59.92%, 83.45%, 97.63%, 99.24%, 98.86%, 99.02%, and 99.26% of the total samples, respectively, soil in the study area was generally not polluted and only a small portion of the soils was at a moderate degree of Hg and Cd pollution.
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