西安市主要功能区表层土壤重金属污染现状评价

Study on survey and evaluation of heavy metal pollution of surface soil in main suburbs of Xi′an City

调查了西安市主要功能区表层土壤0～15cm中砷（As）、铬（Cr）、铜（Cu）、铅（Pb）、锌（Zn）5种重金属元素的含量及分布规律．根据功能分区，把西安市分为交通道路边缘带、工业区、生活区、文教区和对照区，在每个区域采集若干个样品进行分析，结果表明，西安市工业区表层土壤重金属污染严重，交通道路边缘带为中度污染，其它功能区为轻度污染，西安市土壤重金属污染的防治重点为交通区和工业区，应加强对严重污染区和中度污染区的防治．

In this thesis the investigation and analysis is made out about the content, distribution and pollution degree of As, Cr, Cu, Pb and Zn in surface soil about 0-15cm of Xi＇an City. According to the function zone of Xi＇an, it is divided into traffic verge area, industry area, living area, culture and education area and contrast area. Many samples are collected from each area. The result analysis and evaluation shows that the surface soil in industry area is the seriously polluted by heavy metal, then the traffic verge, while the others function areas are lightly polluted. Thus, it should pay more attention to governing the soil polluted in industry area and traffic area and some strategies should be designed to prevent and govern the pollution.