博州农田土壤重金属地球化学基线与污染评价  

Geochemical baseline and pollution evaluation of heavy metals in agricultural soils in Bozhou

作　　者：米热阿依·吐尔地 王勇辉[1,2] TURDI Mikray;WANG Yong-hui(College of Geographical Science and Tourism,Xinjiang Normal University,Urumqi 830054,Xinjiang,China;Xinjiang Laboratory of lake Environment and Resource in Arid Zone,Urumqi 830054,Xinjiang,China)

机构地区：[1]新疆师范大学地理科学与旅游学院,新疆乌鲁木齐830054 [2]新疆干旱区湖泊环境与资源实验室,新疆乌鲁木齐830054

出　　处：《化学工程》2022年第3期13-19,共7页Chemical Engineering(China)

基　　金：新疆师范大学校级科研资助项目(XJNUSYS2019A16)。

摘　　要：为确定博乐市周围农田土壤地球化学基线值及土壤污染现状,使用标准化方法和相对累积频率法确定农田土壤中8种元素(Cd、Cr、Cu、Ni、Pb、Zn、Hg、As)的地球化学基线值和偏差值。以两者的均值获得研究区表层农田土壤重金属Cr、Cu、Ni、Zn、Hg、As、Cd、Pb的基线值分别是52.59,29.34,23.74,86.82,0.62,9.03,0.14,32.21 mg/kg。除Ni和As以外的重金属地球化学基线值均高于新疆土壤背景值,分别为背景值的1.07,1.1,1.26,31、1.17,1.66倍。可推断高出部分系人类活动影响。以基线值为评价因子,利用地质累积指数法,评估区域内农田土壤重金属污染的状况。结果表明:8种重金属在土壤中的累积污染从高到低为:Hg>As>Pb>Ni>Cr>Zn>Cu>Cd。To identify the geochemical baseline magnitudes and soil pollution status of farmland soil around Bole city,the geochemical baseline and deviation magnitudes of eight elements in farmland soil including Cd,Cr,Cu,Ni,Pb,Zn,Hg and As were identified by using the standardized method and the relative cumulative frequency method.Based on their mean magnitudes,the baseline magnitudes of heavy metals Cr,Cu,Ni,Zn,Hg,As,Cd and Pb in surface farmland soil of the study area are as follows:52.59,29.34,23.74,86.82,0.62,9.03,0.14,32.21 mg/kg.The geochemical baseline magnitudes of heavy metals except Ni and As are 1.07,1.1,1.26,31,1.17 and 1.66 times higher than the background magnitudes,respectively.So it can be inferred that excess part are influenced by human activities.The baseline magnitude were took as the evaluation factor and the geological accumulation index method were applied to evaluate the situation of heavy metal pollution in farmland soil in the region.The results show that the accumulation of heavy metals in soil is Hg>As>Pb>Ni>Cr>Zn>Cu>Cd.

关 键 词：相对累积频率方法 地球化学基线 农田土壤 标准化方法 重金属元素 

分 类 号：X53[环境科学与工程—环境工程] X142