Absorption of cadmium (II) via sulfur-chelating based cellulose: Characterization, isotherm models and their error analysis
| Autor: | Liuchun Zheng, Peipei Meng, Dan Peng, Yuebei Yang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Cadmium
Chemical substance Polymers and Plastics Organic Chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Sulfur 0104 chemical sciences law.invention chemistry.chemical_compound Adsorption Magazine chemistry law Materials Chemistry Chelation Absorption (chemistry) Cellulose 0210 nano-technology Nuclear chemistry |
| Zdroj: | Carbohydrate polymers. 209 |
| ISSN: | 1879-1344 |
| Popis: | Sulfur-chelating based cellulose was produced successfully through alkali-pretreatment, etherification-substitution, amination-crosslinking and sulfurate-reaction. Further, its physico-chemical properties were characterized thoroughly, and several impact factors, i.e. adsorbent dosage, pH, co-existing ions, temperature and contact time were discussed in details. Particularly, the linear and non-linear isotherm models were used to determine the best-fitting one with the verification of 8 error functions. As a result, the adsorbent had more excellent adsorption capacity of 54.71 mg g−1 at the optimal conditions, i.e. dosage of 4 g L−1; 5.1 of pH value (50 mL of solution), 298 K of temperature, at least 180 min of contact time, and 5 cyclical regeneration of the adsorbent with 0.1 g L−1 ethylenediaminetetraacetic. The Fritz-Schlunder as 4-parameter isotherm model gave the best correlation of the experimental data. Moreover, a complex formation between Cd (II) and the C S, NH2 and NH groups was confirmed as the dominant chemical adsorption interactions. |
| Databáze: | OpenAIRE |
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