珠江口西岸土壤重金属元素相关性分析

THE CORRELATIVITY ANAYSIS OF HEAVY METAL ELEMENT IN SOIL OF W COAST OF PEARL RIVER ESTUARY

土壤重金属元素来源主要受成土母质及成土影响,其次与人类活动也有关。成土母质及成土作用使重金属元素具有高度的相关性,若相关性被打破,富集规律可能受人类活动影响而破坏,受到污染。本文通过珠江口西岸地区采集66个土壤样品,采用相关分析、主成分分析、系统聚类及线性拟合等方法,结合地质背景对土壤As、Cd、Cr、Cu、Hg、Ni、Pb、Zn等8种重金属元素来源、共生组合规律及相关性分析,赤红壤土Cr、Cu、Ni、Zn元素具有高度相关性;滨海潮间土As与Ni、Cu、Cr组合具有明显相关性。

The origin of soil heavy metal element is mainly influenced by soil forming material and process,and secondly in relation to people activity.The soil forming material and process cause the heavy metal elementto to have high correlativity.The concentration rule maybe damaged by people activity if the correlativity is broken,and polluted.In this paper,according to 66 soil samples collected in W coast of pearl river estuary,correlation analysis,major composition analysis,system cluster and linear simulation,etc,in combination to the geological background,origin of 8 soil heavy meal elements As,Cd,Cr,Cu,Hg,Ni,Pb,Zn,paragenesis assemblage rule and correlativity analysis,Cr,Cu,Ni,Zn in laterite have high correlativity,As and Ni,Cu,Cr assemblage in littoral soil have clear correlativity.