【作者】 申燕；

【导师】 李泽琴；

【作者基本信息】 成都理工大学 ， 地球化学， 2007， 硕士

【摘要】 本文对汉源县新县城萝卜岗场地约8.1平方公里的城区规划土地进行了详细的土壤环境地球化学研究。对表层土壤中的Pb、Zn、Cd、Ni、Cu等几种重金属元素进行了总量分析，确定了该区域土壤环境地球化学基线。然后在此基础上通过地质累积指数法和分区评价法对该地区土壤和城市规划用地进行重金属污染的环境地球化学评价。通过研究，本文共取得以下结论：1．通过累积频率法，得到研究区汉源县新县城萝卜岗场地土壤重金属元素环境地球化学基线。2．通过确定的地球化学基线，运用地质累积指数法对该区土壤环境进行评价。该区表层土壤中Cr、Ni、Cu、Zn、As、Pb等元素的地质累积指数集中在—0.07～2.55之间，各元素的污染级数大多为一级和二级，属无污染和轻微污染，有部分样点为3级和4级，为中度污染和强污染。萝卜岗场区土壤各重金属元素污染级别(据地质累积指数)的大小顺序为：Pb＞Zn＞As＞Ni＞Cu＞Cr＞Cd。3．通过土壤环境地球化学研究，从土壤环境角度评价汉源县萝卜岗场地土壤环境进行城市建设是可行的，规划土壤用地与土壤环境相符。通过研究萝卜岗场地的土壤环境地球化学，可为该区提供将来环境扰动的(不管是自然的还是人为的)对比标准或尺度，可为该区后期城市搬迁过程中及迁入后产生的相关环境问题，提供管理工作的执行方向和工作重心，可为有关政府部门对城区的整体发展提供决策依据，也可为后期的土壤环境评价工作提供相关资料，为调控新城区生态环境、城镇人居环境的全面推进和城市社会经济可持续发展规划提供科学依据。更多还原

【Abstract】 The thesis focuses its research on geochemical characteristics of soil environment in someregion of Han Yuan county the new city ,Luobogang of 8.1 square kilometers.At the sametime,the auther also determines geochemical baseline by researching on the contents ofseveral kinds of heavy mentals such as Pb,Zn,Cd,Ni,Cu ect.On the basis of above,the thesismakes the environmental geochemistry analysis of heavy metal pollution to the topsoil in thesystematic region.The main researching results are as follows:1. With the use of statistically analyzing method accumulated frequency way, theenvironmental geochemical baseline of heavy metal elements in topsoil in Han YuanLuobogang region.2. Through the Geoaccumulation Index calculation of elements such as Cr,Pb,Zn,Cd, Ni,Cu,As in topsoil in Luobogang region, the Geoaccumulation Index is from -0.07to 2.55,it is shown that most elements are in contamination level of 1 to2 ,uncontaminated/slightly contaminated;some dements are in contamination level of 3 to4,moderately contaminated/strongly contaminated.According to the GeoaccumulationIndex,the contamination degree fron strong to weak in topsoil is:Pb＞Zn＞As＞Ni＞Cu＞Cr＞Cd.3. According to the study on the environmental geochemistry of topsoil,we can get theopion that the constraction to the city is practical and the systematic is same to the soilenvironmenta geochemical.According to the study on the soil environmental geochemical,we can offord theconstractive standard or scale of the following environment changing not only nature but alsoman- made,also can give out the performing thought and working focus on managing theenvironment problem produced by moring of the city, and can take out the decision-makingfoundation to the government to plan, and can give concerned information to evaluate the soilenvironment,and can offord the scientific information about controlling the ecologyenvironment and overall propelling environment and the continuous development suggestionof the city.更多还原