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北京东郊污灌区土壤重金属垂直分布特征与成因分析

发表时间:2016-09-30  浏览量:1240  下载量:345
全部作者: 赵 烨,袁 静,杨 旭,周凌云,呼红霞
作者单位: 北京师范大学环境学院;水环境模拟国家重点实验室;漳州师范学院化学与环境科学系
摘 要: 为探讨北京东郊(通州平原)城市污灌区土壤重金属的垂直分布特征,在综合考察、采样、分析多个土体剖面后,对其中一个典型剖面的数据结合相关研究和历史资料进行系统分析。结果表明,污灌区土壤剖面的中下部积聚多种重金属元素,其含量及分布特征与土壤的发育特征密切相关,且多超出全球同类母质土壤中对应元素的平均值;该剖面的土壤从3 750 a B.P. 发育至今,由于环境变化形成了由古土壤腐殖质层与砂质壤土层交替出现的多层级体系。土壤发育时期的沉积积累并不是产生重金属垂直分布的原因,而其独特的土体剖面构型与建成于20世纪50年代密集无防渗措施的污灌土渠的耦合作用应当是产生这一结果的主要原因。
关 键 词: 环境地学;污灌土壤;重金属垂直分布;土壤发育特征
Title: The characteristics and driving factors of the heavy metals vertical distribution in the sewage-irrigated soil in Tongzhou Plain, east suburb in Beijing
Author: ZHAO Ye, YUAN Jing, YANG Xu, ZHOU Lingyun, HU Hongxia
Organization: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University,Chemistry and Environment Science Department, Zhangzhou Normal University
Abstract: In order to get information about the heavy metals concentration vertical distribution characteristics of the sewage-irrigated soil in Tongzhou plain, east suburb in Beijing. One typical soil profile was selected after comparing multiple soil profiles. Then the data of the typical soil profile was analyzed on the basis of relevant research and historical data. The results indicated that heavy metals were accumulated at the middle and bottle part of the soil in sewage-irrigated area. The contents and distribution feature were related with the soil growth characteristics. The concentrations of the Cu, Pb, Zn, Cd, Ni, Co, Cd and Cr were higher than the global soil background values, originated from the loses and silt sediments. There were a lot of layer systems with paleosol humus layer and sandy loam layer alternately because of the environmental change from 3 750 a B.P. The heavy metals accumulation was not driven by depositing during the soil development period. The main reason for this result was mainly on account of the coupling driving factors between the special soil body construction and the sewers with no seepage-proofing method, which was built in 1950s.
Key words: environmental geoscience; soil of sewage-irrigation area; vertical distribution of heavy metals; development characteristics of soil
发表期数: 2016年9月第18期
引用格式: 赵 烨,袁 静,杨 旭,等. 北京东郊污灌区土壤重金属垂直分布特征与成因分析[J]. 中国科技论文在线精品论文,2016,9(18):1930-1937.
 
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