聊城市城区水岸带土壤Hg,As含量分布特征及污染评价

摘要:

为了解山东省聊城市城区水岸带土壤中Hg,As含量特征和污染状况,于2015年3月至4月采集了35个水岸带土壤样品,采用王水消解-原子荧光光度计法测定了土壤中Hg,As的含量,并对水岸带土壤Hg,As的污染状况进行了评价.结果表明:聊城市城区水岸带土壤pH值的范围为8.62~9.96,呈碱性;有机质的平均质量分数为32.57 g·kg-1;Hg和As的质量分数平均值分别为0.139 mg·kg-1和9.56 mg·kg-1,各点位As含量均符合国家土壤环境质量一级标准,Hg的超标率为45.7%.As与土壤有机质呈显著正相关(p<0.05).以山东省土壤元素背景值为评价标准,水岸带土壤As总体表现为轻度污染和轻微生态风险,Hg表现为重度污染和较高生态危险.

In order to understand the distribution character and pollution status of the arsenic （As） and mercury （Hg） concentrations in the riparian soil of Liaocheng urban area？ a total of 35 riparian soil samples were collected from Tuhai River, Xiaoyun River and Dongchang Lake in March and April 2015. Soil samples were digested using aqua regia, and then concentra-tions of As and Hg were measured by atomic fluorescence spectrometry method. The pollution level and ecological risk of Hg and As in riparian soil were evaluated. The results showed that the riparian soil was alkaline, with a pH range of 8. 62 - 9.96, and the average content of organic matter was 32. 57 g ·kg^-1. The average concentrations of Hg and As were 0. 139 mg·kg^-1 ,9. 56 mg ·kg^-1. As concentrations were all lower than the class I limit value of the environmental quality standard for soils （GB15618 -1995）,while Hg concentrations in 45. 7% of the samples exceeded its class I limit value. There were signifi-cantly positive correlations between the concentrations of As and soil organic matter content （p〈0. 05）. Taking the soil envi-ronmental background values of Shandong Province as the standards, the As concentrations in riparian soils were generally at low pollution level and posed light ecological risk, while the pollution of Hg concentrations were heavy and posed high ecologi-cal risk to the water environment.

作者:

鲁长娟 张菊 董杰 郭娜 邓焕广 张梦月 王爱静

Lu Changjuan Zhang Ju Dong Jie Guo Na Deng Huanguang Zhang Mengyue Wang Aijing(School of Environment and Planning, Liaocheng University, Liaocheng 252059, Chin)

机构地区:

聊城大学环境与规划学院

出处:

《betway官方app 学报：自然科学版》 CAS 北大核心 2017年第2期43-47,共5页

基金:

国家自然科学基金(41401563 31272383) 山东省自然科学基金(ZR2014JL028) 聊城大学创业创新项目(CXCY2016070) 聊城大学科技创新项目(CXCY2016066)

关键词:

汞 砷 土壤 水岸带 污染评价

mercury arsenic soil riparian zone pollution assessment

分类号:

X503 [环境科学与工程—环境工程]

聊城市城区水岸带土壤Hg,As含量分布特征及污染评价.pdf