[IR spectra of quarternary ammonium cellulose and its adsorption properties to POPs].
In the present paper, the IR spectra, adsorption and reusing property of quaternary ammonium cationic cellulose (QACC) towards POPs were studied. The method and technological parameters of adsorption were discussed. The adsorbing isotherm, thermodynamics (deltaH, deltaS and deltaG), adsorption rate constant and adsorption activation energy of QACC on dyes were determined, and the sorption mechanism of QACC was confirmed initially, too. In near neutral water solution, QACC has a better saturated absorptive capability to water-soluble organic contaminations of aromatic series which contain carboxyl, sulfonic and hydroxyl group, and the presence of common coexistent ions in environmental water had no obvious effect on the saturated adsorption capacity of QACC. The adsorption involves both physical adsorption and chemical adsorption, and the chemical adsorption is the main. The adsorption of QACC to water-soluble organic contaminants followed Langmuir adsorption equation and one-order kinetic equation. Furthermore the adsorption rate constants increase with increasing temperature. QACC could be desorbed and reused with 0.5 mol x L(-1) sodium hydroxide solution after adsorbing water-soluble organic contaminations. QACC is a new environmental function material with excellent performance and can be used to remove the POPs in the environment.
Shi-qin
Yao
Y
College of Urban Construction, University of Shanghai for Science and Technology, Shanghai 200093, China.
Wen-jian
Shi
S
Xiao-yun
Chen
C
Yu
Yun
Y
Qin-lin
Yang
Y