Melake Bealemlay Abebe, Endalew Salie Mulat, Alamirew Tamagnu Sintie, Temesegen Liku Muche
School of Environmental Health Science, College of Health and Medical Science, Haramaya University, Harar, Ethiopia.
Environ Health Insights. 2023 Mar 21;17:11786302231159349. doi: 10.1177/11786302231159349. eCollection 2023.
Metals and metalloids pollution of Ethiopian surface water is becoming an environmental issue. Bioaccumulation and Biota-Sediment Accumulation Factor (BAF and BSAF) are used to quantify the bioaccumulation of contaminants from water and sediment to biota. The present study aimed to determine the BAF and BSAF of metals and metalloids in different surface waters of Ethiopia. Furthermore, the ecological and human health risks were also examined. Generally, 902 peer-reviewed papers from 2005 to 2022 were searched using search engines. The most common types of edible fish species in studied surface waters of Ethiopia were , , and . The concentration of metals and metalloids were higher in sediment than in water and in carnivorous fish than in herbivorous fish. The BSAF of Se in all fish species was greater than 1. was a bio-concentrator of As and Se. The dissolved concentration of Cu, Cd, Pb, and Ni were higher compared to the Ethiopian Environmental Protection Authority and the European Union; Organization of Economic and Co-Operation Development environmental water quality standard guidelines for inland surface freshwater bodies. Likewise, in sediment, the concentration of Cu, Pb, Ni, Zn, and Cr were above Tolerable Effect Concentration values and Cd, Ni, and Cr were above Probable Effect Concentration levels when compared to the United States Consensus-Based Sediment Quality Guidelines for freshwater which indicates that these metals may pose risk to aquatic organisms. Consumption of raw water and fish contaminated with the detected metals and metalloids is not associated with any diseases. However, local consumers who live close to each freshwater ecosystem may become more exposed to health risk hazards. The findings of this study will provide baseline information on BAF and BSAF of metals and metalloids in surface waters and will contribute to the effective monitoring of environmental quality.
埃塞俄比亚地表水的金属和类金属污染正成为一个环境问题。生物累积和生物群 - 沉积物累积因子（BAF和BSAF）用于量化污染物从水和沉积物到生物群的生物累积。本研究旨在确定埃塞俄比亚不同地表水中金属和类金属的BAF和BSAF。此外，还研究了生态和人类健康风险。一般来说，使用搜索引擎检索了2005年至2022年的902篇同行评审论文。埃塞俄比亚研究地表水水域中最常见的食用鱼类品种有 、 和 。沉积物中金属和类金属的浓度高于水中，肉食性鱼类中的浓度高于草食性鱼类。所有鱼类中硒的BSAF均大于1。 是砷和硒的生物浓缩器。与埃塞俄比亚环境保护局和欧盟；经济合作与发展组织内陆地表淡水体环境水质标准指南相比，铜、镉、铅和镍的溶解浓度更高。同样，在沉积物中，与美国基于共识的淡水沉积物质量指南相比，铜、铅、镍、锌和铬的浓度高于可容忍效应浓度值，镉、镍和铬的浓度高于可能效应浓度水平，这表明这些金属可能对水生生物构成风险。饮用受检测到的金属和类金属污染的原水和鱼类与任何疾病均无关联。然而，居住在每个淡水生态系统附近的当地消费者可能面临更高的健康风险。本研究结果将提供地表水中金属和类金属的BAF和BSAF的基线信息，并将有助于有效监测环境质量。
