Geochemical characteristics and pollution extent of arsenic in soils in the northern part of Tianjin Municipality, China

作者：Junyu Wu, Rongshu Zeng, Tianxiang Ren · 发表于：Dizhi tongbao · 年份：2007 · 研究领域：Environmental Quality and Pollution

Based on the sampling depths,two environments of soil sampling may be distinguished:environmentⅠand environmentⅡ. The results of statistical analysis of As in soil samples from environmentⅠindicate that the statistical characteristic values of As obey the normal distribution and that the mean value of As is very close to that of the country and Tianjin Municipality.Comparative study of the characteristics of spatial changes in heavy metals of soils of environmentⅠand environmentⅡshows that there is little difference between the As content in soils of environmentⅠand that in environmentⅡand that the heavy metals in soils of environmentⅡin- herit the features of the heavy metal contents of environmentⅠ.Relatively serious As pollution occurs near the city,in Wuqing and Baodi counties where farmland is imgated by sewage and near the Yuqiao reservoir.The geochemical method and biological method were used to evaluate the pollution extent of soil heavy metals in environmentⅡof the study area.The results indicate that As pollu- tion in the northern part of Tianjin Municipality is not serious.