Department of Conservation and Marine Sciences, Cape Peninsula University of Technology, Cape Town, South Africa.
Centre for Sustainable Oceans, Cape Peninsula University of Technology, Cape Town, South Africa.
Bull Environ Contam Toxicol. 2023 Jun 7;110(6):104. doi: 10.1007/s00128-023-03737-1.
The aim of this study was to measure the characteristics and risk assessment of microplastics (MPs) in Cape Town Harbour (CTH) and the Two Oceans Aquarium (TOA) in Cape Town, South Africa from 2018 to 2020. Water and mussel MP samples were analyzed at 3 sites in CTH and TOA, respectively. Microplastics were mainly filamentous, black/grey and 1000-2000 μm in size. A total of 1778 MPs, averaging 7.50 (± 0.6 standard error of the mean, SEM) MPs/unit were recorded. Average MP concentrations were 10.3 ± 1.1 MPs/L in water and 6.27 ± 0.59 MPs/individual or, based on weight, 3.05 ± 1.09 MPs/g soft tissue wet weight in mussels. Average MPs in seawater in CTH (12.08 ± 1.3 SEM MPs/L) was significantly higher (4.61 ± 1.1 MPs/L) than inside the TOA (U = 536, p = 0.04). Various risk assessment calculations indicate that MPs in seawater poses a greater ecological risk than MPs in mussels at the sites sampled.
本研究旨在测量南非开普敦港（CTH）和开普敦两洋水族馆（TOA）的微塑料（MPs）特征和风险评估，研究时间为 2018 年至 2020 年。分别在 CTH 和 TOA 的 3 个地点分析水样和贻贝 MPs 样本。微塑料主要为丝状、黑色/灰色和 1000-2000μm 大小。共记录到 1778 个 MPs，平均每个单位 7.50（±0.6 标准误差，SEM）个 MPs。水中 MPs 浓度平均为 10.3±1.1 MPs/L，贻贝中每个个体 MPs 浓度为 6.27±0.59 MPs/个体，或基于重量为 3.05±1.09 MPs/g 软体组织湿重。CTH 海水中的平均 MPs（12.08±1.3 SEM MPs/L）明显高于 TOA 内的 MPs（U=536，p=0.04）。各种风险评估计算表明，与取样点的贻贝 MPs 相比，海水中的 MPs 对生态的威胁更大。
