Modified activated carbons with amino groups and their copper adsorption properties in aqueous solution

作者：Mahaninia Mohammad Hassan^*; Rahimian Paria; Kaghazchi Tahereh

来源：Chinese Journal of Chemical Engineering, 2015, 23(1): 50-56.

DOI：10.1016/j.cjche.2014.11.004

• Activated carbon
• Amino groups
• Cu (II) adsorption
• Freundlich model

Activated carbons were prepared by two chemical methods and the adsorption of Cu (II) on activated carbons from aqueous solution containing amino groups was studied. The first method involved the chlorination of activated carbon following by substitution of chloride groups with amino groups, and the second involved the nitrilation of activated carbon with reduction of nitro groups to amino groups. Resultant activated carbons were characterized in terms of porous structure, elemental analysis, FTIR spectroscopy, XPS, Boehm titration, and pH(zpc). Kinetic and equilibrium tests were performed for copper adsorption in the batch mode. Also, adsorption mechanism and effect of pH on the adsorption of Cu (II) ions were discussed. Adsorption study shows enhanced adsorption for copper on the modified activated carbons, mainly by the presence of amino groups, and the Freundlich model is applicable for the activated carbons. It is suggested that binding of nitrogen atoms with Cu (II) ions is stronger than that with H+ ions due to relatively higher divalent charge or stronger electrostatic force.

• 出版日期2015-1
• 单位Saskatchewan; Saskatoon