Abstract：
Heavy metals affect the suitability of aquatic environment for all purposes; hence, this study evaluated heavy metal contamination in Agodi Reservoir Oyo State, Nigeria. Atomic Absorption Spectrophotometry was used to determine heavy metal concentrations. Heavy Metal Pollution Index (HPI), Water Quality Index (WQI), Pollution Index (PI), Comprehensive Pollution Index (CPI), Contamination Index (CI), Single-Factor Pollution Index (SFPI), Heavy metal Evaluation Index (HEI), and Human Health Risk Assessments (HRA) were used to determine the extent of heavy metal pollution and their impact on the aquatic environment. The order of heavy metal concentrations in both wet and dry seasons was Fe > Mn > Zn > Cu > Cd > Ni > Cr > Pb > Co and Mn > Fe > Zn > Cu > Co > Ni > Cd > Cr > Pb, respectively. WQI for both wet (3182.6) and dry (3649.5) seasons classified the reservoir as \"unsuitable for aquatic life.\" Also, the CPI rated the reservoir to be \"severely polluted\" in both dry (311.2) and wet (268.7) seasons. Similarly, HEI (951.3 and 2059.7) and Cd (942.3 and 2050.7) rated the reservoir as \"highly polluted\" in wet and dry seasons, respectively. The Hazard Quotient (HQ ingestion) was in the order of Mn > Cu > Cd > Zn > Fe > Co > Ni > Cr > Pb in the dry season while the order was Cu > Mn > Cd > Fe > Zn > Ni > Pb > Co > Cr in the wet season. The HQ ingestion revealed that Cr (0.00), Ni (0.33; 022), and Pb (0.00; 0.06) were the only metals with HQ values lesser than 1 (HQ < 1) while the values of HQ (dermal) were less 1 (HQ < 1) indicating that there was no health risk in association with the domestic use of the water. The pollution level of the reservoir means that urgent attention is needed from different agencies for the conservation, management, and sustainable development of the reservoir.
摘要：
重金属影响水生环境对所有目的的适用性；因此，这项研究评估了奥约州Agodi水库的重金属污染，尼日利亚。使用原子吸收分光光度法测定重金属浓度。重金属污染指数(HPI)水质指数（WQI），污染指数（PI），综合污染指数(CPI)污染指数(CI)，单因素污染指数(SFPI)重金属评价指数(HEI),和人类健康风险评估（HRA）用于确定重金属污染的程度及其对水生环境的影响。干湿季重金属浓度顺序为Fe>Mn>Zn>Cu>Cd>Ni>Cr>Pb>Co,Mn>Fe>Zn>Cu>Co>Ni>Cd>Cr>Pb,分别。对于潮湿（3182.6）和干燥（3649.5）季节，WQI将水库归类为“不适合水生生物”。“另外，CPI将水库在干燥（311.2）和潮湿（268.7）季节都评为“严重污染”。同样，HEI（951.3和2059.7）和Cd（942.3和2050.7）在干湿季节将水库评为“高度污染”，分别。干季的危害商（HQ摄食）顺序为Mn>Cu>Cd>Zn>Fe>Co>Ni>Cr>Pb，而干季顺序为Cu>Mn>Cd>Fe>Zn>Ni>Pb>Co>Cr。HQ摄入显示Cr(0.00)，Ni(0.33;022),和Pb（0.00;0.06）是HQ值小于1（HQ<1）的唯一金属，而HQ（真皮）值小于1（HQ<1），表明与家庭用水没有健康风险。水库的污染水平意味着需要不同机构的紧急关注来保护，管理,和水库的可持续发展。
