Heavy metal contamination of sedimentary microplastics in Hong Kong

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)

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Author(s)

Detail(s)

Original languageEnglish
Title of host publication9th International Conference on Marine Pollution and Ecotoxicology
Place of PublicationHong Kong
Publication statusPublished - Jun 2019

Conference

Title9th International Conference on Marine Pollution and Ecotoxicology (ICMPE-9)
LocationUniversity of Hong Kong
PlaceHong Kong
Period10 - 14 June 2019

Abstract

This is the first study of heavy metal (As, Cd, Ni, Mn, Cu) contamination of microplastics on sandy beaches in Hong Kong. Three study sites are located in the eastern waters (Pak Lap Wan, Stanley Bay, Tung Lung Chau Island) and the remaining sites in the western waters (Tai Pai Tsui, Ha Pak Nai and Shui Hau Wan). The mean concentration of Mn (52.88 mg kg-1) was the highest and followed by Cu (4.09 mg kg-1), Ni (0.36 mg kg-1), As (0.07 mg kg-1), and Cd (0.06 mg kg-1). Western sites have significantly higher concentrations of Ni but eastern sites higher concentrations of Cd. Inter-site differences were found with a significantly higher concentration of Cd (0.15 mg kg-1) at Shui Hau Wan than Tai Pai Tsui (< LOD) and Ha Pak Nai (< LOD). The concentration of Ni was significantly higher at Ha Pak Nai (1.09 mg kg-1) than Tai Pai Tsui (0.08 mg kg-1) and Pak Lap Wan (0.04 mg kg1 ). The results indicate that the source was different for different metals. As a large number of marine biological species are known to ingest microplastics, the study of heavy metal contamination of microplastics will help assess the potential risk of bioaccumulation and biomagnification of heavy metals through trophic transfer.

Citation Format(s)

Heavy metal contamination of sedimentary microplastics in Hong Kong. / LI, Wenjie; Lo, H.S.; Wong, H.M.; Zhou , M.; Wong, C.Y.; Tam, N.F.Y.; Cheung, S.G.

9th International Conference on Marine Pollution and Ecotoxicology. Hong Kong, 2019. P-45.

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)