Aluminium-modified activated carbon as efficient adsorbent for cleaning of cationic dye in wastewater. (20th December 2018)

• Record Type: Journal Article
• Authors: Kazeem, Taye S.; Lateef, Saheed A.; Ganiyu, Saheed A.; Qamaruddin, Muhammad; Tanimu, Abdulkadir; Sulaiman, Kazeem O.; Sajid Jillani, Shehzada Muhammad; Alhooshani, Khalid
• Is Part Of: Journal of cleaner production. Volume 205(2018)
• Page Start: 303
• Page End: 312
• Publication Date: 2018-12-20
• Subjects: Al-modified activated carbon -- Adsorption -- Methylene blue -- Water remediation -- Langmuir isotherms -- Second order kinetics; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2018.09.114
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Facile and efficient adsorbent was prepared by modification of the activated carbon (AC) with aluminium (Al). Impregnation of commercial AC with varying weight percents (1, 2, 5 and 10%) of Al, using aluminium nitrate solution, resulted to AC-Al of differing Al-loading amounts and the composites were investigated for their sorption capacity of methylene blue (MB) in aqueous phase. Adsorbent characteristics with respect to cationic dye (MB) adsorption efficiency was studied by N2 -physisorption, Raman spectroscopy, FTIR and Boehm titration. The AC-Al (2) adsorbent containing 2 wt % Al loaded on AC yielded the best performance due to better acidic and basic properties, with little compromise on surface area. Parametric investigation indicated a fast sorption process which is endothermic in nature. The Langmuir isotherm well described the adsorption process with a maximum adsorption capacity of 181.82 mg/g. The kinetic studies showed that the adsorption process followed a pseudo-second order kinetics. The high removal efficiency of the AC-Al (2) indicated its immense potential in toxic water remediation. Highlights: Impregnation of aluminium onto carbon increased number of acidic and basic sites. Synergy of both acidic and basic sites enabled better adsorption of methylene blue. The graphitic structure of as-received carbon was preserved after Al impregnation.