Multi-component adsorption of Pb(II), Cd(II) and Ni(II) onto microwave-functionalized cellulose: Kinetics, isotherms, thermodynamics, mechanisms and application for electroplating wastewater purification.
Herein, microwave-functionalized cellulose derived from rice husk was cost-effectively prepared and employed for Pb(II), Cd(II) and Ni(II) elimination in mono- and multi-component systems. Benefiting from microwave irradiation, the functionalized process was achieved in 6.5 min and the resultant RHMW-X possessed remarkably high adsorption capacities of 295.20 mg/g for Pb(II), 151.51 mg/g for Cd(II) and 72.80 mg/g for Ni(II) within the equilibrium time of 30 min. Noticeably, the metal ions adsorption rate and capacity in binary and ternary systems were lower than that of unary systems. The coexistence of Cd(II) and Ni(II) significantly slowed down the Pb(II) adsorption in binary and ternary systems, while Pb(II) exhibited the most obvious influence on the metal ions uptake in the multi-component systems. FT-IR and XPS results revealed that both ion exchange and chelation were functioned in the metal ions uptake, while physical interaction was also involved in the adsorption process. Moreover, the RHMW-X possessed favorable recyclability with slight adsorption efficiency decline during five cycles in different systems. Particularly, the RHMW-X could effectively purify actual industrial wastewater containing Pb(II), Cd(II) and Ni(II) for meeting regulatory requirements. This work facilitates the omnidirectional improvement of adsorbents for the de-pollution of practical heavy metals wastewater.
['Qu|Jianhua|J|', 'Tian|Xue|X|', 'Jiang|Zhao|Z|', 'Cao|Bo|B|', 'Akindolie|Modupe Sarah|MS|', 'Hu|Qi|Q|', 'Feng|Chengcheng|C|', 'Feng|Yan|Y|', 'Meng|Xianlin|X|', 'Zhang|Ying|Y|']
D000327:Adsorption D002104:Cadmium D002482:Cellulose D007700:Kinetics D007854:Lead D008872:Microwaves D009532:Nickel D012275:Oryza D052616:Solid Phase Extraction D013816:Thermodynamics D062065:Waste Water D014874:Water Pollutants, Chemical D018508:Water Purification
Adsorption Rice husk Multi-component systems Heavy metal ions Microwave-assisted preparation