Open AccessStudy on the Adsorption of Methyl Red by Bentonite / Chitosan Composites
Author(s) -
Peng Xiang,
Chao Deng,
Longjiang Liu,
Yalou Huang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/782/2/022079
Subject(s) - adsorption , chitosan , bentonite , thermogravimetric analysis , methyl red , scanning electron microscope , chemistry , materials science , kinetics , nuclear chemistry , composite number , dissolution , chemical engineering , composite material , organic chemistry , physics , quantum mechanics , engineering
A composite material is formed by using chitosan and bentonite under the condition of dissolution with acetic acid. The material was characterized by scanning electron microscope thermogravimetric analysis and infrared spectroscopy. The effects of initial concentration of methyl red, adsorption time, pH, and amount of adsorbent on adsorption were investigated. Then, the adsorption process was analyzed from kinetics, and related parameters were calculated. The results showed that the composite material has a wider pH range than using chitosan as an adsorbent to adsorb methyl red; The mass ratio of chitosan to bentonite is 0.08:1, the removal rate of methyl red is the best; The amount of adsorbent used is 0.7mg to reach saturation for a volume of 25mL of methyl red solution with a concentration of 20ug/l; the adsorption of methyl red by the material conforms to the pseudo-second-order kinetic model.