期刊
POLYMER
卷 160, 期 -, 页码 115-125出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2018.11.035
关键词
Poly(vinyl alcohol) (PVA); Methylene blue; Glutaraldehyde; Multiwalled carbon nanotube; Cutting-edge isothermal and kinetics study; Electrical conductivity
资金
- Research Affairs Division Isfahan University of Technology (IUT), Isfahan, I. R. Iran
- National Elite Foundation (NEF), Tehran, I. R. Iran
- Center of Excellence in Sensors and Green Chemistry Research (IUT) Isfahan, I. R. Iran
- Iran Nanotechnology Initiative Council (INIC), Tehran, I. R. Iran
The fabrication of glutaraldehyde (Gl)-crosslinked poly(vinyl alcohol) (PVA)/Vitamin C (VC)-multi walled carbon nanotubes (VC-MWCNTs) composites and their adsorption capacity for removal of methylene blue (MB) are reported. These composites were characterized with various techniques. The thermal stability of Gl-cross-linked PVA/VC-MWCNTs 3 and 5 wt% was greater than PVA owing to uniform distribution of VC-MWCNTs. The results of adsorption experiments showed that the Gl-crosslinked PVA/VC-MWCNTs 7 wt% can remove about 97 +/- 3% of MB from aqueous solution after 45 min at room temperature. The up-to-date linear and nonlinear forms of two isotherms (Langmuir and Freundlich) and two kinetic models (pseudo-first-order and pseudo-second-order) were studied. The adsorption data obeyed nonlinear pseudo-first-order model and linear Freundlich isotherm. Also, the adsorbent can be reused for five times after regeneration without any loss of the efficiency (removal approximate to 97 +/- 3%). The outcomes of electrical conductivity analysis demonstrated that the fine electrical conductivity was achieved at 3 wt% of VC-MWCNTs.
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