State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi, China.
State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi, China.
J Environ Sci (China). 2021 Jun;104:335-350. doi: 10.1016/j.jes.2020.12.012. Epub 2020 Dec 28.
Trace metal contamination in water and bioaccumulation in aquatic organisms are human health risks of increasing concern. However, the bioaccumulation of trace metals in the organs of the mussel Cristaria plicata in Dongting Lake, China and the human health risks of mussel consumption are largely unknown. We investigated the concentrations of 15 trace metals and metalloids in surface water, sediments, and C. plicata organs (foot, gill, mantle, and visceral mass) and quantified the bioaccumulation and human health risk of these trace metals in specimens collected from Dongting Lake. The concentrations of most metals in surface water exceeded previously published background values. In contrast, the concentrations of most metals in sediments showed a decreasing trend. Overall, the metal concentrations in the gill and visceral masses of C. plicata were higher than those in the foot and mantle, and higher bioaccumulation capacities were observed for essential metals than for nonessential metals. The mean concentrations of the trace elements Zn, Pb, Cd, As, Cu, and Cr in C. plicata foot samples were lower than the threshold values established by international and Chinese organizations. The estimated daily intake (EDI) values of the essential metal Mn in C. plicata foot was higher than the recommended tolerable daily intake (TDI) values for juveniles. Only Mn for juveniles and As for both juveniles and adults may pose noncarcinogenic health risks through foot consumption. The hazard index (HI) values for adults and juveniles were higher than 1, suggesting significant risks of noncarcinogenic effects to humans by exposure to multiple metals.
痕量金属在水中的污染和在水生生物体内的生物累积是人们日益关注的健康风险。然而，中国洞庭湖贻贝 Cristaria plicata 器官中痕量金属的生物累积以及贻贝消费对人体健康的风险在很大程度上尚不清楚。我们调查了地表水、沉积物和 C. plicata 器官（足部、鳃、套膜和内脏团）中 15 种痕量金属和类金属的浓度，并定量分析了从洞庭湖采集的贻贝标本中这些痕量金属的生物累积和人体健康风险。大多数金属在地表水中的浓度高于之前公布的背景值。相比之下，大多数金属在沉积物中的浓度呈下降趋势。总体而言，C. plicata 鳃和内脏团中的金属浓度高于足部和套膜，必需金属的生物累积能力高于非必需金属。贻贝足部样品中痕量元素 Zn、Pb、Cd、As、Cu 和 Cr 的平均浓度低于国际和中国组织制定的阈值。C. plicata 足部 Mn 的估计每日摄入量（EDI）值高于青少年可耐受的每日摄入量（TDI）值。只有 Mn（青少年）和 As（青少年和成年人）可能通过足部摄入对人体造成非致癌健康风险。成年人和青少年的危害指数（HI）值均高于 1，表明暴露于多种金属会对人体产生非致癌影响的风险较大。
