Toxicological assessment of heavy metals accumulated in vegetables and fruits grown in Ginfel river near Sheba Tannery, Tigray, Northern Ethiopia
Toxicological assessment of heavy metals accumulated in vegetables and fruits grown in Ginfel river near Sheba Tannery, Tigray, Northern Ethiopia
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DOI：
10.1016/j.ecoenv.2013.05.035
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发表时间：
2013-09-01
影响因子：
6.8
通讯作者：
Van der Bruggen, Bart
中科院分区：
文献类型：
--
作者：
Gebrekidan, Abraha;Weldegebriel, Yirgaalem;Van der Bruggen, Bart
用工业废水中的污染水灌溉蔬菜，可能会导致蔬菜中重金属的积累，这可能会造成潜在的公共卫生风险。我们量化的重金属（铜，锌，铁，锰，铬，镉，镍，钴和铅）在土壤中，蔬菜和灌溉用水在两个网站（莱乌克罗和Tahtay乌克罗）周围的乌克罗镇，提格雷，埃塞俄比亚北部的浓度。在本研究期间测量的灌溉水中的重金属浓度低于灌溉水允许的重金属允许限值。从Tahtay Wukro获得的灌溉土壤样品中重金属的平均浓度较高的锰，锌，铬，铜。土壤样品中Mn、Zn、Cr、Ni、Cu、Co、Pb、Fe和Cd的含量范围分别为2.62 - 827、1.4 - 51.6、25.5 - 33.6、23.5 - 28.2、2.52 - 25.1、15 - 17.8、3 - 4、2.54 - 0.49和0.7 - 0.8 mg/kg。在Tahtay Wukro的蔬菜样品中也观察到较高浓度的重金属。Pb在所有蔬菜样品中积累最多。据观察，绿色辣椒和生菜积累了大量的铜和锌;瑞士甜菜积累了过量的铁，锰，铬，镉，镍和钴;生菜和番茄较高量的镉;和绿色辣椒，番茄和洋葱较高浓度的铅。从莱莱和Tahtay Wukro分析的蔬菜之间的元素浓度的显着差异进行了观察。这部分归因于研究区域的地质性质以及该镇和制革厂的排放。结果还表明，铁，铅和镉具有较高的转移因子值（平均值分别为42.89，0.84和0.37）。重金属在不同蔬菜中的迁移规律为Fe> Pb> Cd> Mn> Cu> Zn> Ni> Zn> Cr = Co。位于制革厂下游的Tahtay Wukro种植的蔬菜中的重金属污染可能会增加当地居民的健康风险。(C)2013 Elsevier Inc. All rights reserved.
The accumulation of heavy metals in vegetables resulting from irrigation with contaminated water obtained from industrial effluents may create a potential public health risk. We quantified the concentration of heavy metals (Cu, Zn, Fe, Mn, Cr, Cd, Ni, Co and Pb) in soil, vegetables and the water used for irrigation at two sites (Laelay Wukro and Tahtay Wukro) around Wukro Town, Tigray, Northern Ethiopia. The concentrations of heavy metals in irrigation water measured during this study were lower than permissible limits of heavy metals allowed for irrigation water. The mean concentrations of heavy metals in irrigated soil samples obtained from Tahtay Wukro were higher for Mn, Zn, Cr, and Cu. The overall results of soil samples ranged 2.62-827, 1.4-51.6, 25.5-33.6, 23.5-28.2, 2.52-25.1,15-17.8, 3-4, 2.54-0.49 and 0.7-0.8 mg/kg for Mn, Zn, Cr, Ni, Cu, Co, Pb, Fe and Cd, respectively. Higher concentrations of heavy metals were also observed in vegetable samples from Tahtay Wukro. Pb was found to accumulate the most in all vegetable samples. It was observed that green pepper and lettuce accumulate high amounts of Cu and Zn; Swiss chard accumulates excessive amounts of Fe, Mn, Cr, Cd, Ni and Co; lettuce and tomato higher amounts of Cd; and green pepper, tomato and onion a higher concentration of Pb. Significant differences in the elemental concentrations between the vegetables analyzed from Laelay and Tahtay Wukro were observed. This was attributed in part to the geological nature of the study area and the discharges from the town and from a tannery. The results also indicate that Fe, Pb and Cd have high transfer factor values (mean values: 42.89, 0.84 and 037, respectively). The transfer pattern for heavy metals in different vegetables showed a trend in the order: Fe > Pb > Cd > Mn > Cu > Zn > Ni > Zn > Cr=Co. The heavy metal contamination of vegetables grown in Tahtay Wukro, located downstream of the tannery, may pose increased health risks in the future to the local population through consumption of vegetables. (C) 2013 Elsevier Inc. All rights reserved.