Kamal, M.F., Bagastyo, A.Y. and Firdausy, M.A. 2025. Abundance and Characteristics of Microplastics in the Martapura River, Banjarmasin, South Kalimantan. Envirotek : Jurnal Ilmiah Teknik Lingkungan. 17, 1 (Oct. 2025), 12–17. DOI:https://doi.org/10.33005/envirotek.v17i1.2092.