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Adsorption removal of crystal violet from aqueous solution using a metal‐organic frameworks material, copper coordination polymer with dithiooxamide
Author(s) -
Li Xiaojuan,
Zheng Lingyan,
Huang Lianzhu,
Zheng Ou,
Lin Zhenyu,
Guo Longhua,
Qiu Bin,
Chen Guonan
Publication year - 2013
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39009
Subject(s) - adsorption , aqueous solution , langmuir adsorption model , copper , endothermic process , enthalpy , chemisorption , monolayer , crystal violet , chemistry , inorganic chemistry , materials science , metal , polymer , organic chemistry , thermodynamics , nanotechnology , medicine , physics , pathology
The potential application of copper coordination polymer with dithiooxamide (H 2 dtoa Cu), one of the metal‐organic frameworks (MOFs) in the adsorption removal of crystal violet (CV) from aqueous solution was studied. Batch adsorption experiments were carried out as a function of initial pH, adsorbent concentration, contact time, initial dye concentration and temperature. The adsorption of CV on H 2 dtoa Cu can be best described by the Langmuir isotherm model ( R 2 > 0.9983) with maximum monolayer adsorption capacity of 165.83, 185.87, and 204.50 mg g −1 at 298, 308, and 318 K, respectively. The kinetics of CV adsorption followed pseudo‐second‐order model ( R 2 > 0.9984) and the chemisorption was proved to be rate‐limiting step. Thermodynamic parameters, the change of free energy (Δ G °), entropy (Δ S °) and enthalpy (Δ H °), showed that the adsorption of CV on H 2 dtoa Cu was feasible, spontaneous and endothermic process. Here we concluded that H 2 dtoa Cu is a promising adsorbent for the removal of harmful dyes from aqueous solution. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013