Mohd Zainuddin, N. A., Mohamad Sarwani, N. ., Puasa, S. W. ., & Ismail, K. N. . (2022). Reduction of Hexavalent Chromium to Trivalent Chromium using Sludge from Acetylene Gas Production. International Journal of Integrated Engineering, 14(5), 178-187. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/11939