Depth Profiles of Microplastic in Sediment Cores in the Mangrove Area of Kuala Gula Mangrove, Malaysia

• Published in: Journal of marine science and engineering Vol. 11; no. 6; p. 1223
• Main Authors: Mohamed, Che Abd Rahim, Shahruddin, Aqilah Nur, Pradit, Siriporn, Loh, Pei Sun, Nitiratsuwan, Thongchai, Kobkeatthawin, Thawanrat, Noppradit, Prakrit, Le, Thi Phuong Quynh, Oeurng, Chantha, Sok, Ty, Lee, Choon Weng, Bong, Chui Wei, Lu, Xixi, Anshari, Gusti Z., Kandasamy, Selvaraj, Wang, Jianjun
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.06.2023
• Subjects: Abundance; Aluminum; aquatic pollution; Baseline studies; Colour; Consumption; Cores; Cotton; Depth profiling; Dry weight; Fisheries; Forests; Laundry; mangrove area; Mangroves; marine debris; Marine environment; microplastic; Microplastics; Plastic debris; Plastic pollution; Pollutants; Polyethylene terephthalate; Polymers; Rayon; Sediment; sediment core; Sediments; Sediments (Geology); Shellfish; Spectrum analysis; Wastewater; Thailand; China; Malaysia; Selangor Malaysia
• ISSN: 2077-1312; 2077-1312
• DOI: 10.3390/jmse11061223

Microplastics are widespread in coastal and marine environments, and sediments serve as a sink for microplastics. In this study, four sediment cores were collected from the Kuala Gula Mangrove area. The abundance of microplastics in mangrove sediments ranged from 25–130 items/kg dry weight. The highest abundance of microplastic was observed at the KG04 site near the mouth of the river. The number of microplastics by sampling site was significantly different (p < 0.01), with station KG04 having the highest fiber content. The dominant color of microplastics was blue, and the main shape was fiber. Rayon, cotton, Polyethylene terephthalate (PET), and azlon were observed from FT-IR, indicating that the potential sources of microplastic and fiber could come from household laundry wastewater. Microplastics tended to accumulate in deeper depths at KG01 (p < 0.01), whereas other stations showed no significant difference (p > 0.05). However, this study provides evidence that mangroves can be a trap for microplastics and can be used as baseline data for future studies.