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Starch Biocryogel for Removal of Methylene Blue by Batch Adsorption
Author(s)
Taweekarn, Tarawee
Wongniramaikul, Worawit
Boonkanon, Chanita
Phanrit, Chonthicha
Sriprom, Wilasinee
Limsakul, Wadcharawadee
Towanlong, Wanchitra
Choodum, Aree
Date Issued
December 1, 2022
Type
Article
Abstract
A green monolithic starch cryogel was prepared and applied for the removal of methylene blue (MB) using a batch system. The influence of various experimental parameters on MB adsorption was investigated. High removal efficiency (81.58 ± 0.59%) and adsorption capacity (34.84 mg g−1) were achieved. The Langmuir model better fitted the experimental data (determination coefficient (R2) = 0.9838) than the Freundlich one (R2 = 0.8542), while the kinetics of MB adsorption on the cryogel followed a pseudo-second-order model. The adsorption process was spontaneous and endothermic with an activation energy of 37.8 kJ mol−1 that indicated physical adsorption. The starch cryogel was used for MB removal from a wastewater sample collected from a local Batik production community enterprise in Phuket, Thailand, and a removal efficiency of 75.6% was achieved, indicating that it has a high potential as a green adsorbent for MB removal.
Citation
Polymers, 14(24), 2022