Adsorption kinetics, isotherms and thermodynamics of atrazine on surface oxidized multiwalled carbon nanotubes.
The adsorption kinetics, isotherms and thermodynamic of atrazine on multiwalled carbon nanotubes (MWCNTs) containing 0.85%, 2.16%, and 7.07% oxygen was studied. Kinetic analyses were performed using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. The regression results showed that the pseudo-second-order law fit the adsorption kinetics. The calculated thermodynamic parameters indicated that adsorption of atrazine on MWCNTs was spontaneous and exothermic. Standard free energy (DeltaG(0)) became less negative when the oxygen content of MWCNTs increased from 0.85% to 7.07% which is consistent with the low adsorption affinity of MWCNTs for atrazine.
Chen
Guang-Cai
GC
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Shan
Xiao-Quan
XQ
Zhou
Yi-Quan
YQ
Shen
Xiu-e
XE
Huang
Hong-Lin
HL
Khan
Shahamat U
SU
D000327:Adsorption; D001280:Atrazine / Q000737:chemistry / Q000302:isolation & purification*; D006540:Herbicides / Q000737:chemistry / Q000302:isolation & purification; D007700:Kinetics; D037742:Nanotubes, Carbon; D013816:Thermodynamics
D006540:Herbicides; D037742:Nanotubes, Carbon; D001280:Atrazine