Adsorption of Cr(VI) and methyl orange from aqueous solutions by quaternized chitosan immobilized bentonite

作者：Hu Pan; Wang Jing; Huang Ruihua^*

来源：Desalination and Water Treatment, 2017, 65: 435-442.

DOI：10.5004/dwt.2017.0487

• Quaternized chitosan
• Composite
• Methyl orange
• Cr(VI)
• Adsorption

In this study, batch adsorption study was utilized in evaluating the potential suitability of quaternized chitosan immobilized bentonite (BT) as an adsorbent in the adsorption of anionic pollutants, Cr(VI), and methyl orange (MO) from aqueous solutions. The adsorptive behaviors of Cr(VI) and MO were examined as a function of the ratio of quaternized chitosan to BT, adsorbent dosage, solution pH, initial Cr(VI) (or MO) concentration, and contact time. The adsorption equilibrium for both Cr(VI) and MO was reached quickly. Adsorption isotherms for Cr(VI) and MO were well described by the Langmuir isotherm, while the pseudo-second-order kinetic model provided good kinetic data fitting. Furthermore, the results show that this adsorbent exhibited higher adsorption capacity for MO than Cr(VI). It appears that this anionic Cr(VI) favored the electrostatic interactions with this adsorbent while the anionic MO dye may interact with this adsorbent by electrostatic interactions and the hydrogen bonding.

• 出版日期2017-2
• 单位西北农林科技大学