Integrated Science and Technology Research Center (Applied Chemistry/Environmental Management/Software Engineering), Prince of Songkla University, Phuket Campus, Phuket, 83120, Thailand.
Faculty of Technology and Environment, Prince of Songkla University, Phuket Campus, Phuket, 83120, Thailand.
Environ Sci Pollut Res Int. 2018 Dec;25(36):36147-36157. doi: 10.1007/s11356-018-3488-7. Epub 2018 Oct 25.
Metal contamination in seafood has raised public health concerns, especially for local residents who live in coastal areas. In this study, the levels of cadmium (Cd), lead (Pb), mercury (Hg), and zinc (Zn) were determined in the marine bivalve, Marcia optima, as well as in water, and sediment samples collected from the coastal area of Phuket Bay, Thailand. The results showed that metal concentrations in sediments (4.05-7.14, 16.68-18.13, 164-213 mg kg for Cd, Pb, and Zn, respectively) and water samples (0.16-0.44, 0.15-0.26, and 0.32-0.48 mg L for Cd, Pb, and Zn, respectively) were below the threshold effects concentration of the sediment quality guidelines for adverse effects to occur and the marine water quality standards of Thailand. A human risk assessment was performed and the results showed that the risks associated with M. optima consumption at Saphan Hin and Paklok were negligible for most of the metals studied, with the maximum estimated daily intake value being observed for Zn (0.00663 mg kg per day) at Saphan Hin. In addition, Cd, Zn, Pb, and Hg would be unlikely to pose a risk to human health with a hazard quotient of less than 1, with only the bioaccumulation factor of Zn being detectable in both locations (0.034 and 0.026 at Saphan Hin and Paklok, respectively). However, continuous monitoring is encouraged to prevent the risks associated with the consumption of metal-contaminated seafood.
海产品中的金属污染引起了公众健康关注，特别是对于生活在沿海地区的当地居民。在这项研究中，测定了泰国普吉湾沿海地区采集的海洋双壳贝类马氏珠母贝以及水和沉积物样本中的镉 (Cd)、铅 (Pb)、汞 (Hg) 和锌 (Zn) 水平。结果表明，沉积物中的金属浓度（Cd、Pb 和 Zn 分别为 4.05-7.14、16.68-18.13 和 164-213mg/kg）和水样中的金属浓度（Cd、Pb 和 Zn 分别为 0.16-0.44、0.15-0.26 和 0.32-0.48mg/L）均低于发生不利影响的沉积物质量指南和泰国海洋水质标准的阈值效应浓度。进行了人类风险评估，结果表明，在 Saphan Hin 和 Paklok 食用马氏珠母贝的风险对于大多数研究金属而言可以忽略不计，最大估计日摄入量值出现在 Saphan Hin 的 Zn（0.00663mg/kg/天）。此外，Cd、Zn、Pb 和 Hg 的危害系数均小于 1，不太可能对人体健康构成风险，只有 Zn 的生物累积系数在两个地点均可检测到（Saphan Hin 和 Paklok 分别为 0.034 和 0.026）。然而，建议进行持续监测，以防止食用受金属污染海产品带来的风险。
