Analysis of Microplastic Types and Abundance in Water, Sediments, and Lokan Clams (Geloina erosa) in the Coastal Waters of Sinaboi, Rokan Hilir Intan Nur’aini ; Bintal Amin ; Yusni Ikhwan Siregar Journal of Coastal and Ocean Sciences 2 Okt 2026 10.31258/jocos.7.2.79-86