摘要
为揭示贵州省稻田土壤重金属的超标状况和空间分布特征,采集了92个稻田土壤样品,用ICP-MS测定了样品的重金属含量,并运用单因子污染指数法、富集因子法和空间分析法对数据进行了分析处理。结果表明,贵州省稻田土壤的As、Cd、Cr、Cu、Ni、Pb、Sb和Zn平均含量分别为(19.7±17.1)、(0.577±0.690)、(91.1±38.6)、(40.5±32.8)、(37.1±20.3)、(35.5±32.0)、(3.59±8.81)和(135±128)mg/kg;89.1%的点位重金属超标,67.4%的点位为轻微(超标1~2倍)和轻度(超标2~3倍)超标;Ni、As、Cd主要由地质高背景成因导致;在成矿区和成矿带上,出现源于人为活动的重金属超标,在一些点位和区域达到了中度超标(超标3~5倍)至重度(超标大于5倍)超标。
To understand the pollution status and spatial distributions of heavy metals in paddy soils of the Guizhou province, China, a total of 92 paddy soil samples were collected from Guizhou and heavy metals concentrations of these samples were measured by ICP-MS. The data were analyzed statistically by the methods of single factor index, enrichment factor index and spatial geographic analysis in accordance to the environmental quality standard for soils of China(GB 15618-1995). The results showed that average concentrations of As, Cd, Cr, Cu, Ni, Pb, Sb and Zn in paddy soil samples were(19.7±17.1),(0.577±0.690),(91.1±38.6),(40.5±32.8),(37.1±20.3),(35.5±32.0),(3.59±8.81) and(135±128) mg/kg, respectively;heavy metals exceeding their national standard levels were found in 89.1% of the sampling sites, and 67.4% of which either exceeded the standards slightly(1-2 times exceeding the standards) or mildly(2-3 times exceeding the standards);the high geological backgrounds of Ni, As and Cd, especially Cd, could account for their exceeding of the standards;in areas of metallogenic zone and belt, heavy metals exceeded the standards moderately(3-5 times exceeding the standards) even severely(more than 5 times exceeding the standards) at some sites and regions, which attributed mainly to anthropic activities.
作者
孔祥宇
黄国培
程天金
江帆
王志伟
李秋华
喻子恒
张华
姚珩
KONG Xiang-yu;HUANG Guo-pei;CHENG Tian-jin;JIANG Fan;WANG Zhi-wei;LI Qiu-hua;YU Zi-heng;ZHANG Hua;YAO Heng(Guizhou Provincial Key Laboratory of Mountain Environment Information System and Ecological Environment Protection,Guizhou Normal University,Guiyang 550001,China;State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China;Center for International Cooperation of Environmental Protection,Ministry of Environmental Protection,Beijing 100083,China;Guizhou Provincial Grass Industry Research Institute,Guizhou Academy of Agricultural Sciences,Guiyang 550006,China)
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2018年第6期1084-1091,共8页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家重点研发计划项目(2017YFD0800302)
贵州省科技厅科技支撑计划项目(黔科合支撑[2017]2967,黔科合J字[2011]2358)
关键词
重金属
稻田土壤
贵州省
heavy metals
paddy soils
Guizhou Province
