1. Kinetic research on dechlorinating dichlorobenzene in aqueous system by nano-scale nickel/iron loaded with CMC/NFC hydrogel.
- Author
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Wan XF, Guo C, Liu Y, Chai XS, Li Y, and Chen G
- Subjects
- Cellulose chemistry, Iron chemistry, Models, Theoretical, Nanoparticles chemistry, Nickel chemistry, Spectroscopy, Fourier Transform Infrared, Temperature, Chlorobenzenes chemistry, Halogenation, Hydrogel, Polyethylene Glycol Dimethacrylate chemistry, Kinetics
- Abstract
In this study, we reported on the nano-scale nickel/iron particles loaded in carboxymethyl/nanofibrillated cellulose (CMC/NFC) hydrogel for the dechlorination of o-dichlorobenzene (DCB) in aqueous solution. The biodegradable hydrogel may provide an ideal supporting material for fastening the bimetallic nano-scale particles, which was examined and characterized by TEM, SEM-EDX, FT-IR and BET. The performance of the selected bimetallic particles was evaluated by conducting the dechlorination of DCB in the solution under different reaction conditions (e.g., pH, dosage of nickel/iron nanoparticles and temperature). The results showed that about 70% of DCB could be dechlorinated at 20 °C in 8 h, which indicated that the immobilized reactive material had a high reduction activity when Ni/Fe loading dosage in the hydrogel (18 wt%) was considered. Moreover, the reduction behavior agreed to the pseudo-first order reaction, in which the dechlorination rate was irrelative to the pH aqueous solution. A kinetic model for predicting the concentration of DCB during the reduction reaction was established based on the experimental data., (Copyright © 2017 Elsevier Ltd. All rights reserved.)
- Published
- 2018
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