Abiy Andemo Kotacho, Tilahun Yimer Girma, Sorsa Sota Solomon, Seifu Berego Yohannes
Sheka Zone, Department of Water, Mines and Energy, Ethiopia.
Department of Aquatic Sciences, Fishery and Aquaculture, College of Natural and Computational Sciences, Hawassa University, Hawassa City, Ethiopia.
Environ Health Insights. 2024 Oct 24;18:11786302241290068. doi: 10.1177/11786302241290068. eCollection 2024.
The Omo River flows through the town of Omorate, where domestic, municipal, and industrial wastes from the town and its surroundings, including agrochemicals, are discharged into the river. The present study was conducted to determine the levels of heavy metals and associated environmental and human health impacts from the Lower Omo River freshwater ecosystem (water and sediment) of the Lower Omo River. The mean concentrations of heavy metals detected in the river water were 0.439 mg/l for (Mn), 0.1 (Zn), 0.168 (Cu), 0.393 (Cr), 0.318 (Pb), 0.007 (Ni), 8.926 (Fe), and 0.06 (Co).The order for the mean concentrations of the heavy metals in the water was Fe > Mn > Cr > Pb > Cu > Zn > Cu > Co > Ni. The HPI value indicates that all water sampling sites were highly contaminated. Oral and dermal HQs for both children and adults were in the order of Cr > Pb > Mn > Fe > Cu > Co > Ni > Zn. The HQ value greater than 1 was investigated for Cr, Pb, and Mn in both children and adults by ingestion and dermal routes from the river water. The CRs for both children and adults by ingestion of the river water followed the order Cr > Pb. According to the CRI value, the river water could be classified as a very high environmental risk. The EI results for the heavy metals detected in the sediments also followed the order: Fe > Cr > Cu > Pb > Mn > Co > Zn > Ni.
奥莫河流经奥莫拉特镇，该镇及其周边地区的生活、市政和工业废物，包括农用化学品，都排入了这条河流。本研究旨在确定奥莫河下游淡水生态系统（河水和沉积物）中重金属的含量以及相关的环境和人类健康影响。河水中检测到的重金属平均浓度分别为：锰（Mn）0.439毫克/升、锌（Zn）0.1、铜（Cu）0.168、铬（Cr）0.393、铅（Pb）0.318、镍（Ni）0.007、铁（Fe）8.926、钴（Co）0.06。水中重金属平均浓度的顺序为：铁＞锰＞铬＞铅＞铜＞锌＞钴＞镍。健康风险指数（HPI）值表明，所有水样采集点都受到了高度污染。儿童和成人经口和经皮的危害商（HQ）顺序均为：铬＞铅＞锰＞铁＞铜＞钴＞镍＞锌。通过摄入河水和经皮途径，对儿童和成人的铬、铅和锰进行调查，发现其危害商值大于1。儿童和成人摄入河水的致癌风险（CR）顺序均为：铬＞铅。根据致癌风险指数（CRI）值，河水可被归类为具有非常高的环境风险。沉积物中检测到的重金属生态风险指数（EI）结果顺序也为：铁＞铬＞铜＞铅＞锰＞钴＞锌＞镍。
