中国滨海湿地土壤汞空间分布及影响因素  

Spatial distribution and influencing factors of soil mercury in coastal wetlands of China

作　　者：张苗苗 张曼胤[1,2,3] 龙颂元 胡宇坤 刘魏魏 王钊 ZHANG Miao-miao;ZHANG Man-Yin;LONG Song-yuan;HU Yu-kun;LIU Wei-wei;WANG Zhao(Institute of Wetlands,Chinese Academy of Forestry,Beijing Key Laboratory of Wetland Ecological Function and Restoration,Beijing 100091,China;Institute of Ecological Conservation and Restoration,Chinese Academy of Forestry,Beijing 100091,China;Hengshui Lake Wetland Ecology,Hebei System National Positioning Observation and Research Station,Hengshui,Hebei 053000,China)

机构地区：[1]中国林业科学研究院湿地研究所,湿地生态功能与恢复北京市重点实验室,北京100091 [2]中国林业科学研究院生态保护与修复研究所,北京100091 [3]河北衡水湖湿地生态系统国家定位观测研究站,河北衡水053000

出　　处：《中国环境科学》2022年第12期5758-5767,共10页China Environmental Science

基　　金：“十三五”重点研发专项(2017YFC0506205)。

摘　　要：通过对7个典型滨海湿地土壤(0~20cm)中总汞含量及土壤理化性质、气候以及社会经济因素的测定收集,研究了滨海湿地土壤中汞的空间分布规律和影响因子之间的关系,并对不同介质环境内汞含量进行分析.结果表明:我国滨海湿地土壤总汞的含量范围是1.26~169.94ng/g,平均值为(33.82±3.09)ng/g;滨海湿地土壤汞含量差异是由土壤理化性质、社会经济以及气候因素共同影响的结果,其中土壤理化性质中pH值、有机质、总铁、总氮为关键影响因素;在汞的输入途径中,河流输送对中国滨海湿地土壤总汞含量的影响要高于大气输送.In this paper,by measuring soil total mercury content(0~20cm),soil physical and chemical properties,climatic and social-economic factors in seven typical coastal wetlands,we studied the spatial distribution of mercury in coastal wetland soils and its relationship with driving factors,and analyzed the mercury content in different environments.The results showed that the total mercury content in coastal wetland soils in China ranged from 1.26ng/g to 169.94ng/g,with an average of 33.82±3.09ng/g.Soil mercury content in coastal wetlands was shaped by soil physical and chemical properties,social economic factors and climate factors,among which pH,organic matter,total iron and total nitrogen were the main factors.For the pathways of mercury input,the influence of river transport on soil total mercury content of coastal wetlands in China was higher than that of air transport.

关 键 词：中国滨海湿地土壤 汞浓度 空间分布 河流输送 汞循环 

分 类 号：X53[环境科学与工程—环境工程] X833