| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7790215 | Carbohydrate Polymers | 2015 | 42 Pages |
Abstract
A new regenerable adsorbent was successfully prepared by modifying maize straw (MS) with succinic anhydride in xylene. The succinylated-maize straw (S-MS) was characterized by FTIR, solid-state MAS 13C NMR spectroscopy, SEM-EDX and point of zero charge analysis. NaS-MS was successfully obtained after deprotonating the carboxylic acid groups of S-MS by Na2CO3 solution. Batch experiments were carried out with NaS-MS for the removal of Cd(II). The effects of pH, adsorbent dosage, contact time, initial concentration and temperature were investigated. The experimental data were best described by a pseudo-second-order kinetics and Langmuir adsorption models. Thermodynamic parameters (ÎG, ÎH, and ÎS) were also calculated from data obtained from experiments performed to study the effect of temperatures. NaS-MS could be regenerated at least five times in saturated NaCl solution without any loss. Furthermore, â¼97% of adsorbed Cd(II) ions could be recovered as the metal oxide. Finally, the adsorption mechanism of NaS-MS was discussed.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Hong Guo, Shufen Zhang, Zinong Kou, Shangru Zhai, Wei Ma, Yi Yang,