干旱区生态环境知识资源中心(Arid): 乌兹别克斯坦阿姆河流域地表水体水化学及重金属污染特征

Arid

	乌兹别克斯坦阿姆河流域地表水体水化学及重金属污染特征
其他题名	Characteristics of Hydrochemistry and Risk Assessment of Heavy Metals in Surface Water in Amu Darya Basin of Uzbekistan,Arid Central Asia
	占水娥; 吴敬禄; Shakhimardan Shaniyazov; 金苗
来源期刊	长江流域资源与环境
ISSN	1004-8227
出版年	2021
卷号	30 期号:8 页码:1938-1946
中文摘要	为了分析乌兹别克斯坦阿姆河流域地表水体水化学类型及重金属污染水平及其污染程度,对研究区水体水化学参数和15种金属元素进行了研究,采用内梅罗综合污染指数法对水体中6种重金属(As、Hg、 Cd、Pb、Cr、Cu)的综合污染程度进行了评价。结果表明:研究区地表水体水化学类型主要有3类:第Ⅰ类型为Ca-HCO_3型,受岩石风化和大气降水共同控制,主要分布于近出山口区;第Ⅱ类型为Ca-Mg-SO4型,主要受岩石风化控制,分布于河流的中下游区;第Ⅲ类型为Ca-Mg-Cl、Na-SO4 -Cl和Na-Cl型,受水体蒸发结晶作用控制,主要分布于河流末端区和城镇区。对应于水化学类型,金属元素浓度也存在明显的差异,第Ⅲ类型水体各金属元素平均浓度总体较高,而处于出山口附近的第Ⅰ类型水体金属元素浓度最低。重金属污染风险评价结果显示,第I类型和第II类型水体Pn平均值分别为0.28和0.18,为无污染水体,而第III类型水体Pn平均值接近0.7,明显高于第I类和第II类水体,部分水体Pn值大于1,污染相对严重,明显受到人类活动影响。总体来说,乌兹别克斯坦阿姆河流域地表水体重金属污染程度较弱,处于低风险等级。水体污染分布特征与水化学类型空间分布基本一致,受到不同程度的人类活动影响。
英文摘要	To analyze the hydrochemical types and the degree of heavy metal pollution in surface water of Amu Darya Basin,the water chemical parameters and the concentration of trace metals in the basin were studied. Results showed that the hydrochemical types and metal concentrations of surface water in the study area displayed significant spatial variations. Ca-HCO_3 type (type I),with the lowest metal concentrations,was found near the mountain-pass,and controlled by rock weathering and atmospheric precipitation. While the Ca-Mg-Cl-,Na- SO4-Cl-,and Na-Cl types (type III),with the highest metal concentrations,distributed in the estuary or near urban and were dominated by evaporative crystallization. The Ca-Mg-SO4 type (type II) was observed in the middle and lower reaches of rivers,and dominated by rock weathering. Furthermore,by using the method of Nemerow index,the comprehensive pollution degree of heavy metals (As,Hg,Cd,Pb,Cr,Cu) in surface water was evaluated. The Pn mean values of type I and type II surface water were 0.28 and 0.18,respectively, indicating the safety level. However,the Pn mean value of type III was close to 0.7,which was significantly higher than that of others,and the values of Pn were greater than 1 in some water samples of type III,indicating relatively heavy pollution. The results of risk assessment had a good consistency with the spatial distribution of hydrochemical types,which were affected to varying degrees by human activities in this studied area. In general, the level of heavy metal pollution in surface water of Amu Darya Basin is relatively low,suggesting low risk.
中文关键词	阿姆河流域 ; 地表水 ; 水化学 ; 金属元素 ; 污染评价
英文关键词	Amu Darya Basin surface water hydrochemistry trace metals risk assessment
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Environmental Sciences & Ecology
CSCD记录号	CSCD:7046696
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378038
作者单位	占水娥, 中国科学院南京地理与湖泊研究所;;中国科学院大学, 湖泊与环境国家重点实验室;;, 南京;;, 江苏;;北京 210008;;100049, 中国.; 金苗, 中国科学院南京地理与湖泊研究所;;中国科学院大学, 湖泊与环境国家重点实验室;;, 南京;;, 江苏;;北京 210008;;100049, 中国.; 吴敬禄, 中国科学院南京地理与湖泊研究所, 湖泊与环境国家重点实验室, 南京, 江苏 210008, 中国.
推荐引用方式 GB/T 7714	占水娥,吴敬禄,Shakhimardan Shaniyazov,等. 乌兹别克斯坦阿姆河流域地表水体水化学及重金属污染特征[J],2021,30(8):1938-1946.
APA	占水娥,吴敬禄,Shakhimardan Shaniyazov,&金苗.(2021).乌兹别克斯坦阿姆河流域地表水体水化学及重金属污染特征.长江流域资源与环境,30(8),1938-1946.
MLA	占水娥,et al."乌兹别克斯坦阿姆河流域地表水体水化学及重金属污染特征".长江流域资源与环境 30.8(2021):1938-1946.