Setyopratomo, P., Agustriyanto, R. A. and Widianto, A. Y. (2026) “THE EFFECT OF THERMAL AND CHEMICAL ACTIVATION ON RIVER SAND FOR THE REMOVAL OF METHYLENE BLUE DYES BY ADSORPTION”, jurnal ATMOSPHERE, 7(2), pp. 1-8. doi: 10.36040/atmosphere.v7i2.18914.