Abstract

Heavy metal concentrations of Mn, Cr, Fe, Ni, Cu, Zn, Cd and Pb in sediment samples collected from 12 stations in the Black Sea coast, Buyukdere and Sabuncular streams around Cayeli copper mine area in Rize, Turkey were measured using Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES). The mean concentrations of Mn, Cr, Fe, Ni, Cu, Zn, Cd and Pb in the sediments have been determined to be 585.10, 22.50, 33,603.95, 7.40, 63.97, 75.50, 0.20 and 7.83 mg kg⁻¹, respectively. The mean heavy metal concentrations examined in sediment samples have been determined as lower than the permissible level for sediment. Assessment of the heavy metals pollution in the sediments was carried out by calculating the enrichment factor (EF), geoaccumulation index (I_geo), contamination factor (CF) and pollution load index (PLI) indices. It has been found according to the mean EF values in sediment samples that Mn, Cr, Fe, Ni and Pb had no enrichment while Cu, Zn and Cd showed minor enrichment in the field. The mean I_geo and PLI values indicated that sediments in the field were not polluted with all heavy metals examined. PCA showed that the origin of Mn, Cr, Ni and Pb was natural sources and Cu, Zn and Cd were lowly influenced from anthropogenic inputs, and the origin of Fe was also natural sources but was slightly influenced from anthropogenic inputs. Human health risk assessment of the heavy metals was carried out by calculating the hazard quotient (HQ) and the hazard index (HI) for the non-carcinogenic metals and the carcinogenic risk (CR) for the carcinogenic metals through ingestion and dermal contact. The mean HQ, HI and CR values were in safety limits. This indicated that the levels of all heavy metals examined in the sediments did not cause carcinogenic and non-carcinogenic health risks for humans via ingestion and dermal contact.

摘要

使用感应耦合技术测量了土耳其里泽市Cayeli铜矿区附近的黑海沿岸，Buyukdere和Sabuncular流中的12个站点收集的沉积物样品中的Mn，Cr，Fe，Ni，Cu，Zn，Cd和Pb中的重金属浓度等离子体发射光谱法（ICP-OES）。已确定沉积物中Mn，Cr，Fe，Ni，Cu，Zn，Cd和Pb的平均浓度分别为585.10、22.50、33,603.95、7.40、63.97、75.50、0.20和7.83 mg kg ^-1。沉积物样品中检测到的平均重金属浓度已确定为低于沉积物允许的水平。通过计算富集因子（EF），_地质累积指数（I _geo），污染因子（CF）和污染负荷指数（PLI）指数。根据沉积物样品的平均EF值，发现该田中Mn，Cr，Fe，Ni和Pb没有富集，而Cu，Zn和Cd则富集了。我的意思是_地理PLI值表明田间沉积物并未被所有重金属污染。PCA表明，Mn，Cr，Ni和Pb的来源是自然来源，而人为输入对Cu，Zn和Cd的影响很小，Fe的来源也是自然来源，但受人为输入的影响很小。通过计算非致癌金属的危险商（HQ）和危险指数（HI）以及通过摄入和皮肤接触引起的致癌金属的致癌风险（CR），对重金属的人类健康风险进行了评估。HQ，HI和CR的平均值处于安全范围内。这表明在沉积物中检测到的所有重金属含量均不会通过摄入和皮肤接触对人类造成致癌和非致癌健康风险。