Phothilangka, Phimphaka. “EFFICIENCY OF LOW-COST ADSORBENT MATERIALS FOR HYDROGEN SULFIDE REMOVAL FROM BIOGAS USING A FIXED BED ADSORPTION COLUMN”. Life Sciences and Environment Journal 26, no. 1 (June 10, 2025): 63–79. accessed December 10, 2025. https://ph01.tci-thaijo.org/index.php/psru/article/view/260921.