城市交通干道绿地砷污染评价

摘要

In order to study arsenic pollution in city and the different functional areas of arsenic contamination of space diversity, 35 soil samples from mount Mopan and the main road greenbelt in the city of Jilin were collected for determination of pH, organic matter and arsenic content. The single pollution index and the cumulative pollution index method were used to evaluate soil arsenic contamination assessment, the analysis of variance method were used comparison of different functional areas of arsenic contamination. The results show that: arsenic the content of Jilin City streets was 26. 43 mg/kg, it was 4. 08 times as the natural soil and 7. 26 times as the arsenic background values of soil in Jilin city; Arsenic content exceeded the overall rate of 12. 9% . The single pollution indexes of Jiangbei Industrial zone, Jilin Street and Jiefang Road were 1.34,0.95 and 0.87 up slightly overall pollution level, respectly. And the coefficient of variations of Jiangbei Industrial zone,Jilin Street and Jiefang Road were close and low, were 0. 13,0. 11 and 0. 17, respectly. The accumulation pollution index of arsenic contamination of soil was 3. 21, and decreaed from north to south, therefore, the arsenic pollution comes mainly from Jiangbei industrial zone of pollution by Industrial Waste.%为了研究城市砷污染的现状及不同区域砷污染的空间差异性,以吉林市表层土壤为研究对象,在交通干道的绿化带和磨盘山保护区采集35个土壤样本,进行pH、有机质及砷含量的测定.采用单项污染指数、污染累计指数法等对土壤砷污染进行评价,并运用方差分析的方法对不同区域的砷污染进行了差异比较.研究表明:吉林市街道砷含量为26.43 mg/kg,为磨盘山自然土壤砷含量的4.08倍,为吉林市砷土壤背景值7.26倍；吉林市砷总体超标率12.9％.江北工业区、吉林大街和解放大路的单项污染指数分别为1.34、0.95、0.87,整体达到轻微污染水平.江北工业区和吉林大街、解放大路的变异系数相差不大,依次为0.13、0.11、0.17.土壤砷的污染累积指数为3.21,且由北向南递减,因此,砷污染主要来自于江北工业区的工业“三废”污染.