基于文献数据的广西不同功能区土壤镉含量特征研究

Characteristics of Cadmium Content in Soils of Different Functional Areas in Guangxi Based on Literature Data

为了解广西土壤中重金属镉含量的现状,搜集国内关于研究广西城区、非矿区土壤和矿区中镉含量的文献,共搜集到目标文献46篇,对这些文献的数据进行统计分析。统计结果表明,广西城区土壤镉含量范围0.047～0.77mg/kg,均值0.332mg/kg,矿区土壤镉含量范围0.60～114.4mg/kg,均值14.644mg/kg,非矿区农用土壤镉含量范围0.04～4.11mg/kg,均值0.742mg/kg。矿区、城区和非矿区壤镉含量的均值分别是广西土壤镉背景值(0.0617mg/kg)的237.34倍、12.03倍、5.22倍,表明污染较严重区域主要是河池周边矿业发达的南丹县。文献调查中并没有涉及广西所有区域,仅根据所得数据建议对矿区多属地的武宣县、平南县、贺县等地区进行进一步研究,并为全面治理广西土壤镉污染问题提出合理性规划。

In order to understand the present situation of cadmium content in the soil of Guangxi,a total of 46 literatures were collected about the contents of cadmium in agricultural soils and mining areas in Guangxi urban areas and non-mining areas,and the data of these literatures were statistically analyzed.The statistic results show that the cadmium content of soil in Guangxi urban area is 0.047~0.77 mg/kg,mean 0.332 mg/kg,agricultural soil cadmium content range is 0.60~114.4 mg/kg,the average value of the agricultural soil cadmium content range is 0.04~4.11 mg/kg,average value 0.742 mg/kg.The average cadmium content of soil in mining area,urban area and non-mining area is 237.34 times,12.03 times and 5.22 times of the cadmium background value(0.0617mg/kg)in Guangxi,and the data collected indicate that the more serious pollution area is mainly the developed Nandan County of Hechi.As the literature survey does not involve all regions of Guangxi,it is suggested that Wuxuan County,Pingnan County,He County and other areas of the mining area should be further studied based on the data obtained.