Jeong Jongwook, Shim Won Joon, Cho Youna, Han Gi Myung, Jang Mi, Hong Sang Hee
Ecological Risk Research Department, Korea Institute of Ocean Science and Technology, Geoje 53201, Republic of Korea; Department of Ocean Science, University of Science and Technology, Daejeon 34113, Republic of Korea.
Ecological Risk Research Department, Korea Institute of Ocean Science and Technology, Geoje 53201, Republic of Korea.
Mar Pollut Bull. 2023 Nov;196:115673. doi: 10.1016/j.marpolbul.2023.115673. Epub 2023 Oct 20.
This study investigated the presence of microplastics (MPs) in mussels from an urbanized bay in Korea, focusing on intra-annual variation. The average MP concentration was 0.36 ± 0.14 n/g w.w. (1.24 ± 0.56 n/individual). MPs were detected throughout the year with minor monthly variation and no significant monthly changes. Although there was no correlation between MP concentration in mussel and seawater, a positive relationship was observed when normalizing MPs to mussel's condition index (except for July). Polypropylene, polyethylene and acrylate polymer were dominant MPs, with high-density polymers comprising 59 % of the total. Most MPs were fragments and particles <200 μm. This study indicates that strict time restrictions for mussel sampling may not be necessary to assess MP levels in this bay. Additionally, considering MPs in seawater, biological conditions of mussel may be essential for understanding variations in MP levels in mussels. Including small MPs (<200 μm) and high-density polymers in MP assessment is recommended.
本研究调查了韩国一个城市化海湾贻贝中微塑料（MPs）的存在情况，重点关注年内变化。微塑料的平均浓度为0.36±0.14个/克湿重（1.24±0.56个/个体）。全年均检测到微塑料，月度变化较小，无显著的月度变化。虽然贻贝中微塑料浓度与海水之间没有相关性，但将微塑料标准化为贻贝的状况指数时（7月除外）观察到正相关关系。聚丙烯、聚乙烯和丙烯酸酯聚合物是主要的微塑料，高密度聚合物占总量的59%。大多数微塑料是<200μm的碎片和颗粒。本研究表明，评估该海湾微塑料水平可能无需对贻贝采样设置严格的时间限制。此外，考虑到海水中的微塑料，贻贝的生物学状况对于理解贻贝中微塑料水平的变化可能至关重要。建议在微塑料评估中纳入小尺寸微塑料（<200μm）和高密度聚合物。
