Optimization in a two-stage sorption of malachite green by date palm residue carbon

This paper aimed to optimize the sorption of malachite green onto date seed shell activated carbon. Langmuir and pseudo-second-order constants were used to evaluate the optimum mass and contact time, respectively with the aid of Microsoft Excel. Mass reduction of 34% was obtained, while contact time has been optimized by 70% for the two-stage sorption system. The improvement from a two-stage design would offer benefits in enhancing the performance of the sorption process