干旱区生态环境知识资源中心(Arid): 乌兰布和沙漠乌海段新月形沙丘表层沉积物粒度与重金属分布特征

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	乌兰布和沙漠乌海段新月形沙丘表层沉积物粒度与重金属分布特征
其他题名	Characteristics of Heavy Metal Distribution and Grain Size in Surface Sediments of Barchan Dunes of the Wuhai Section in Ulan Buh Desert
	陈新闯 1; 郭建英 2; 董智 1; 李红丽 1; 李锦荣 2; 王合云 1
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2015
卷号	29 期号:3 页码:47-51
中文摘要	以乌兰布和沙漠乌海段下风向新月形沙丘为研究对象,运用样方调查与室内实验相结合的方法,对比分析新月形沙丘表层土壤及降尘中沉积物粒度特征,Mn、Cu、Zn、Cr、Fe等重金属元素及其与粒径的相关性及重金属来源,并对其潜在生态风险进行评价。结果表明:(1)沙丘不同部位粒径主要以极细砂和细砂为主,降尘主要以极细砂、粉粒为主,但上风向沙丘粒度主要以细砂和中砂为主,工业化使沙丘表面粒径细化。(2)沙丘表层及降尘中重金属含量表现为Fe>Mn>Cr>Zn>Cu,Mn、Cu、Zn、Cr含量均高于背景值,且降尘中重金属含量与沙丘具有明显差异性。重金属变异系数表现为Cu>Fe>Zn>Mn>Cr,Mn、Zn中等变异(15%~36%),Fe、Cu高度变异(>36%);Mn、Zn、Cu、Cr发生富集,富集系数均大于1。(3)Mn、Zn、Cu与细颗粒物质含量呈明显正相关,Zn、Cu在中砂范围呈负相关,Fe均呈负相关。(4)Cu、Zn、Cr主要来源于工业污染,部分Cu、Zn来源于人们日常生活;部分Fe、Mn来源于工业污染,其余来自于地球风化。乌海段下风向新月形沙丘属于低生态风险和轻度生态危害状态,但需控制Mn、Cu、Zn、Cr含量的增加与富集。
英文摘要	This study focused on barchan dune of Wuhai section in Ulan Buh desert.By integrating sampling investigation with laboratory experiment,the study determined the characteristics of heavy metals(Mn,Cu, Zn,Cr and Fe)and grain size of surface sediments from surface soil and dustfall of barchan dunes,as well as the correlation between heavy metals and particle size.The sources of heavy metal and its potential ecological risk were also analyzed.The results showed that:(1)The sediment grain were dominated by very fine sand and fine sand on barchan dunes and mainly contained very fine sand and silt in dustfall.However,the sediment grain were mainly medium sand and fine sand on upwind dunes and industrialization led to refinement of grain size on the dune surface.(2)The content of different heavy metal of the dune surface and dustfall followed the order:Fe>Mn>Cr>Zn>Cu,with the contents of Mn,Cu,Zn and Cr all higher than the background value.The contents of heavy metals in dustfall significantly differed with those in sand dunes.The variation coefficient of different heavy metal listed in the following order:Cu>Fe>Zn>Mn> Cr.Mn and Zn showed intermediate variability(15%~36%),while Fe and Cu were highly variable(> 36%).The enrichment of Mn,Zn,Cu and Cr were observed and their enrichment coefficients were all higher than 1.(3)The contents of Mn,Zn and Cu were positively correlated with that of fine particle,while the contents of Zn and Cu were negatively correlated with that of medium sand,and Fe content showed negative correlation with all heavy metals.(4)The major source of Cu,Zn and Cr was industrial pollution.A part of Fe and Mn also came from industrial pollution and a part of Cu and Zn came from the daily life of human. The rest heavy metals were from earth weathering.The results indicated that Barchan dunes in study area were in the state of low ecological risk.However,the enrichment of Mn,Cu,Zn and Cr should be well controlled.
中文关键词	新月形沙丘 ; 降尘 ; 重金属 ; 富集系数 ; 生态风险 ; 乌兰布和沙漠
英文关键词	barchan dune dustfall heavy metal enrichment coefficient ecological risk Ulan Buh desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5456041
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233352
作者单位	1.山东农业大学林学院泰山森林生态站, 山东省土壤侵蚀与生态修复重点实验室, 泰安, 山东 271018, 中国; 2.水利部牧区水利科学研究所, 呼和浩特, 内蒙古 010020, 中国
推荐引用方式 GB/T 7714	陈新闯,郭建英,董智,等. 乌兰布和沙漠乌海段新月形沙丘表层沉积物粒度与重金属分布特征[J],2015,29(3):47-51.
APA	陈新闯,郭建英,董智,李红丽,李锦荣,&王合云.(2015).乌兰布和沙漠乌海段新月形沙丘表层沉积物粒度与重金属分布特征.水土保持学报,29(3),47-51.
MLA	陈新闯,et al."乌兰布和沙漠乌海段新月形沙丘表层沉积物粒度与重金属分布特征".水土保持学报 29.3(2015):47-51.