Modified pineapple bran cellulose by potassium permanganate as a copper ion adsorbent and its adsorption kinetic and adsorption thermodynamic
| Autor: | Yuanhong Zhuang, Jianfu Chen, Jinna Liu, Peng Fei |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
0106 biological sciences Bran General Chemical Engineering digestive oral and skin physiology 04 agricultural and veterinary sciences 040401 food science 01 natural sciences Biochemistry chemistry.chemical_compound Potassium permanganate 0404 agricultural biotechnology Adsorption chemistry Chemisorption 010608 biotechnology Specific surface area Freundlich equation Absorption (chemistry) Cellulose Food Science Biotechnology Nuclear chemistry |
| Zdroj: | Food and Bioproducts Processing. 122:82-88 |
| ISSN: | 0960-3085 |
| DOI: | 10.1016/j.fbp.2020.04.008 |
| Popis: | Using potassium permanganate-modified pineapple cellulose as an adsorbent, the absorption behaviour of Cu2+ was analyzed based on isothermal adsorption, adsorption kinetics and adsorption thermodynamics. SEM, FTIR and XPS analyses were conducted to further investigate the absorption mechanism. Results showed that the modified pineapple bran cellulose by potassium permanganate adsorbed more Cu2+ in solution than the unmodified pineapple bran cellulose by 110.96%. SEM, XPS and FTIR analyses demonstrated that the strong oxidizing agent MnO4− attacked the molecule chains of pineapple bran cellulose and resulted in the growth in the specific surface area and active groups, which provided additional adsorption sites for Cu2+. Adsorption kinetic studies revealed that the adsorption of the modified pineapple bran cellulose for Cu2+ was consistent with the Freundlich isotherm and the pseudo-second order kinetic equation indicating mainly chemisorption. Thermodynamic studies showed that the adsorption process was spontaneous and exothermic. And the chemisorption process dominated the Cu2+ adsorption process of modified pineapple bran cellulose. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect