Amnath, Y. and Aiyathiti, C. 2026. DECOLORIZATION OF LIGNIN IN WASTEWATER BY CATALYTIC OZONATION USING ZINC OXIDE-COATED RIVER GRAVEL. Suranaree Journal of Science and Technology. 33, 3 (Aug. 2026), 030389(1–9). DOI:https://doi.org/10.55766/sujst11561.