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河北栾城不同污水灌溉年限土壤中重金属分布特征研究

发表时间:2014-07-31  浏览量:1641  下载量:444
全部作者: 祗志姣,廉晶晶,靳孟贵
作者单位: 中国地质大学环境学院;长江大学地球环境与水资源学院
摘 要: 通过野外调查、采样分析,研究典型污水灌溉区(河北省栾城县娄底镇)18年和50年污水灌溉及非污水灌溉对照田不同深度土壤重金属Pb,Cr,Cd,As,Cu,Zn的分布特征。结果表明:对于偏碱性壤土或砂质壤土,随着污水灌溉年限的增加,污灌区0~20 cm层土壤中重金属Cd,Pb,Cu和Zn明显累积,As和Cr累积不明显。污水灌溉区WS2(18年)和WS3(50年)土壤Pb,Cd,Cu和Zn含量在垂向上均呈现为0~20 cm层增幅最大,20~40 cm层增幅相对减小,40~200 cm层增幅具有波动性的变化趋势。分析认为污水灌溉区土壤中Cd,Pb,Cu和Zn分布受污水灌溉影响较大,而Cr来源于成土母质及污水灌溉,As则主要受土壤本底值控制。
关 键 词: 水资源保护;污水灌溉;土壤重金属;分布特征
Title: Vertical distribution characteristics of soil heavy metals under sewage irrigation for different decades in Luancheng, Hebei province
Author: DI Zhijiao, LIAN Jingjing, JIN Menggui
Organization: School of Environmental Science, China University of Geosciences; School of Earth Environment and Water Resource, Yangtze University
Abstract: Based on field investigation, soil sampling and analysis, the contents of Pb, Cr, Cd, As, Cu and Zn in farmland soils and their vertical distribution in typical sewage irrigation areas for different history (18 years, 50 years and non-sewage) in Loudi, Luancheng of Hebei province were studied. The results showed that for alkaline loam or sandy loam, the contents of total Cd, Pb, Cu and Zn in top soils increased with time of sewage irrigation, but not evident for As and Cr. For the sites of WS2 (18 years) and WS3 (50 years), the total contents of Pb, Cd, Cu and Zn were increased significantly for the layer of 0-20 cm, and increased less for the layer of 20-40 cm, but not increased evidently for the layers of 40-200 cm. The contents of Cd, Pb, Cu and Zn in sewage irrigated soil were largely influenced by sewage irrigation and the content of Cr might come from soil parent material and sewage irrigation, while the content of As was mainly controlled by soil parent material.
Key words: water resources protection; sewage irrigation; heavy metal of soil; distributing characteristics
发表期数: 2014年7月第14期
引用格式: 祗志姣,廉晶晶,靳孟贵. 河北栾城不同污水灌溉年限土壤中重金属分布特征研究[J]. 中国科技论文在线精品论文,2014,7(14):1430-1439.
 
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