Assessing Mn, Fe, Cu, Zn, and Cd pollution in bottom sediments of Wadi Al-Arab Dam, Jordan
Assessing Mn, Fe, Cu, Zn, and Cd pollution in bottom sediments of Wadi Al-Arab Dam, Jordan
复制标题
DOI：
10.1016/j.chemosphere.2006.06.043
复制
发表时间：
2006-12-01
期刊：
影响因子：
8.8
通讯作者：
Yusuf, Nigem
中科院分区：
文献类型：
--
作者：
Ghrefat, Habes;Yusuf, Nigem
从阿拉伯峡谷大坝采集了35个底泥样品。通过对大坝底泥中的锰、铁、铜、锌、镉、总有机质(TOM)和碳酸盐(CO3-2)含量的测定，评价其对环境的污染程度，探讨这些污染物的来源。浓度数据采用相关分析和因子分析进行处理。相关分析和因子分析的结果表明，锰、铁、铜、锌、镉、TOM和CO3-2之间的正相关和负相关均较低，表明阿拉伯荒漠沉积物中的重金属具有不同的人为来源和自然来源。研究结果还证实了这些污染物的复杂行为，受许多因素的影响。利用富集系数和地质累积指数进行沉积物污染评价。计算的富集系数表明，锰和铜的贫化程度分别为0.76和1.33，而铜、锌和镉的富集度分别为3.6和30。地质积累指数结果表明，瓦迪阿-阿拉伯沉积物中的锰、铁、铜无污染，锌中度污染，镉强至重度污染。一些锌和镉的浓度升高可能是由于坝址附近的人为来源。这些来源主要包括农业活动中使用的化肥和杀虫剂，以及伊尔比德市污水处理厂的污水。采用风险评价法(RAC)和序贯提取法对镉、锌的环境风险进行了评价。锌具有低的环境风险，而镉具有中等的环境风险。(C)2006爱思唯尔有限公司。保留所有权利。
Thirty five bottom sediment samples were collected in a grid pattern from Wadi Al-Arab Dam. The present study focuses on the levels of Mn, Fe, Cu, Zn, Cd, total organic matter (TOM) and carbonate content (CO3-2) in order to assess the extent of environmental pollution and to discuss the origin of these contaminants in sediments of the dam. Concentration data were processed using correlation analysis and factor analysis. The results of correlation analysis and factor analysis show low positive and negative correlations among Mn, Fe, Cu, Zn, Cd, TOM, and CO3-2 and indicate that heavy metals in sediments of Wadi Al-Arab have different anthropogenic and natural sources. The results also confirm the complicated behavior of these pollutants, that can be influenced by many factors. Sediments pollution assessment was carried out using enrichment factor and the geoaccumulation index. The calculation of enrichment factors showed that Mn and Cu are depleted by 0.76, and 1.33, respectively, whereas Cu, Zn, and Cd are enriched by 3.6, and 30, respectively. The results of geoaccumulation index reveal that sediments of Wadi A]-Arab are uncontaminated with Mn, Fe, and Cu, moderately contaminated with Zn, and strongly to extremely contaminated with Cd. Some of the elevated concentration of Zn and Cd are probably due to anthropogenic sources nearby the dam site. These sources mainly include fertilizers and pesticides used in agricultural activities, and the effluent of Irbid City treatment plant. Environmental risks of Cd and Zn were evaluated using the risk assessment code (RAC) and sequential extraction method. Zn poses a low environmental risk, whereas Cd poses a medium environmental risk. (c) 2006 Elsevier Ltd. All rights reserved.