Journal
JOURNAL OF POLYMERS AND THE ENVIRONMENT
Volume 28, Issue 10, Pages 2720-2733Publisher
SPRINGER
DOI: 10.1007/s10924-020-01804-w
Keywords
Chitosan; Fly ash; Crosslinking; Adsorption; Reactive red 120 dye; Box-behnken design
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Funding
- Ministry of Education, Malaysia [600-IRMI/FRGS/5/3 (340/2019), FRGS/1/2019/STG01/UiTM/02/3]
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Crosslinked chitosan-ethylene glycol diglycidyl ether (CTS-EGDE) was modified by loading fly ash (FA) particles into its polymeric matrix to improve the adsorptive removal of reactive red 120 (RR120) dye. The Box-Behnken design was used to assist in the tuning of optimum synthesis and adsorption conditions, such as the loading ratio of FA particles (A: 0-50%), adsorbent dose (B: 0.02-0.08 g), solution pH (C: 4-10), temperature (D: 30 degrees C-60 degrees C), and time (E: 20-60 min). The highest removal rate (98.8%) of 50 mg/L RR120 dye was achieved under the following conditions: FA loading, 25% (CTS-EGDE/FA-25); adsorbent dose, 0.05 g; solution pH, 4; temperature, 60 degrees C; and time, 40 min. The maximum adsorption capacity of CTS-EGDE/FA-25 for RR120 was 220 mg/g at 60 degrees C. This work provides insights into the optimization of the synthesis of composite materials, which can potentially be applied in wastewater treatment.
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