A., S. et al. 2020. Extraction and Characterization of Chitosan from Crab Shells: Kinetic and Thermodynamic Studies of Arsenic and Copper Adsorption from Electroplating Wastewater. Iraqi Journal of Science. 61, 9 (Sep. 2020), 2156–2171. DOI:https://doi.org/10.24996/ijs.2020.61.9.2.