Fitria Sari, D., Hamdani, T., Kalauw, S., Ermawati, R., Kartika, R. and Hadi Raharjo, S. (2026) “Integration of Multi-Index Method and Qual2kw Evaluation Modeling of Quality Status and Pollutant Dispersion Pattern of Perian River in Kutai Kartanegara”, Jurnal Beta Kimia, 6(1), pp. 75-85. doi: 10.35508/jbk.v6i1.28211.