Title of article :
Competitive Adsorption of Cu, Ni, Pb, and Cd from Aqueous Solution Onto Fly Ash-Based Linde F(K) Zeolite
Author/Authors :
Chen, Chen School of Environmental and Chemical Engineering - Jiangsu University of Science and Technology - Zhenjiang 212003 - CHINA , Cheng, Ting Department of City Science - Jiangsu City Vocational College - Nanjing 210036 - CHINA , Tang, Rong Department of City Science - Jiangsu City Vocational College - Nanjing 210036 - CHINA , Han, Cheng-Hui Department of City Science - Jiangsu City Vocational College - Nanjing 210036 - CHINA , Tian, Yuan School of Environmental and Chemical Engineering - Jiangsu University of Science and Technology - Zhenjiang 212003 - CHINA
Abstract :
The reaction of fly ash with a KOH solution was used to synthesize Linde F(K)
zeolite, following which Fourier transform infrared spectroscopy were used to characterize
the crystalline material. The competitive adsorption of Cu, Ni, Pb, and Cd onto this zeolite
was subsequently studied in quaternary solution systems. The results show that the metal removal rates
gradually increase with increases in the pH of the adsorption solution until reaching an asymptotic
value. During the early stages of adsorption, the metal removal rate is very rapid, after which
it gradually decreases. The overall adsorption efficiency order is Pb > Cd > Cu > Ni. The adsorption
process is best represented by pseudo-second-order kinetics and an internal surface diffusion
model. The primary adsorption process, which takes place between approximately 1 to 2 min and 40 min,
appears to be controlled by internal surface diffusion
Keywords :
Fly ash , Zeolite , Competitive adsorption , Heavy metal
Journal title :
Astroparticle Physics
