Kinetics of cadmium adsorption by CNTs grown on PACs
作者： Abdullah Al-Mamun , Iis Sopyan , Md. Zahangir Alam , Suleyman Aremu Muyibi , Mohammed A. Al-Saadi
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摘要: Isotherms and kinetic models are useful tool for the investigation of adsorption process. Carbon nanotubes (CNTs) grown on powdered activated carbons (PACs) was used as novel adsorbent. Two isotherms three were studied removal cadmium from water. The Langmuir Freundlich pseudo first order, second order intraparticle diffusion models. constants qm = 69.759 mg/g, Kl 0.223 R2 0.924. process found more likely to follow model with value 0.961, Kf 9.215 n 3.015. Based kinetics study, best fit 0.996 qe 34.29 (mg/g) K2 0.0013 (g/mg.min). Coefficients qe= 21.145 K1= 0.09 (min-1) 0.936. exhibited 0.812 Kd 1.295 (g/mg.min0.5). CNTs after oxidative functionalization KMnO4 observed be an efficient adsorbent Cd2+
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