Seehamoke C, Sungsitthisawad W. Efficiency of removing heavy metals from chemical oxygen demand test wastewater by using alum sludge from a surface water supply treatment plant. Asia Pac J Sci Technol [Internet]. 2017 Apr. 19 [cited 2024 May 15];16(5):435-43. Available from: https://so01.tci-thaijo.org/index.php/APST/article/view/83377