Analysis of Detergent Content and Diatom Abundance in the Waters of Pakning Village, Bukit Batu Subdistrict, Bengkalis Regency, Riau Nurhafidha Ramadhani ; Syahril Nedi ; Sofyan Husein Siregar Journal of Coastal and Ocean Sciences 2 Okt 2026 10.31258/jocos.7.1.16-22