CAJ | 학술논문

以24 186个表层土壤(0～20 cm)和6 127个深层土壤(150～200 cm)样品之Cd、Hg、Pb、As等含量数据为基础,研究了江苏全省土壤环境的重金属分布与主要污染特征.结果表明.全省自然土壤环境与人为活动土壤环境的重金属元素分布都不均匀,但人为活动土壤环境中的不均衡程度远高于自然土壤环境:全省农田中有1.02%的土壤受到Cd、Hg、Pb等8种重金属的严重污染,苏州市、无锡市土壤环境被重金属污染的程度相对严重;工业化、城市化进程中的人为活动及自然地质作用都是引起江苏局部土壤重金属污染的重要原因,自然成因的重金属污染土壤多呈面状、多元素、低强度、双层污染等特点,从而与人为成因的重金属污染土壤有所区别.
이24 186개표층토양(0～20 cm)화6 127개심층토양(150～200 cm)양품지Cd、Hg、Pb、As등함량수거위기출,연구료강소전성토양배경적중금속분포여주요오염특정.결과표명.전성자연토양배경여인위활동토양배경적중금속원소분포도불균균,단인위활동토양배경중적불균형정도원고우자연토양배경:전성농전중유1.02%적토양수도Cd、Hg、Pb등8충중금속적엄중오염,소주시、무석시토양배경피중금속오염적정도상대엄중;공업화、성시화진정중적인위활동급자연지질작용도시인기강소국부토양중금속오염적중요원인,자연성인적중금속오염토양다정면상、다원소、저강도、쌍층오염등특점,종이여인위성인적중금속오염토양유소구별.
Based on data of 24186 topsoil(0～20 cm in depth) and 6127 deep soil(150～200 cm in depth) samples from whole Jiangsu which contain such elements as Cd,Hg,Pb,As,Cu,Zn,Cr,and Ni,the authors studied the distribution and pollution characteristics of heavy metals in soils by analyzing their spatial variation and pollution source.Some conclusions have been reached:First,the spatial distribution of heavy metal elements is relatively uneven within natural environmental soils and anthropogenic environmental soils of Jiangsu,and the nonuniformity in anthropogenic environmental soils is higher than that in natural environmental soils.Second,a part of farmland soils(1.02% or so) has been badly polluted by some heavy metal elements such as Cd,Hg and Pb,and the pollution from Suzhou and Wuxi is the most severe in all soils of Jiangsu Province.Third,human activities in the industrialization and expansion of cities and some natural geological processes with the formation of parent soil are both important factors responsible for local pollution of heavy metals,and there exist obvious differences between man-made pollution and natural pollution in soils.It is thus held that natural pollution of heavy metals is characterized by planar,polymetallic and double-layer soil pollution with relatively low concentration,whereas things are quite different for man-made pollution.