Taweekarn Tarawee, Wongniramaikul Worawit, Boonkanon Chanita, Phanrit Chonthicha, Sriprom Wilasinee, Limsakul Wadcharawadee, Towanlong Wanchitra, Phawachalotorn Chanadda, Choodum Aree
Integrated Science and Technology Research Center, Faculty of Technology and Environment, Prince of Songkla University, Phuket Campus, Kathu, Phuket 83120, Thailand.
King Mongkut's Institute of Technology Ladkrabang, Prince of Chumphon Campus, Chumphon 86160, Thailand.
Polymers (Basel). 2022 Dec 18;14(24):5543. doi: 10.3390/polym14245543.
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) were achieved. The Langmuir model better fitted the experimental data (determination coefficient () = 0.9838) than the Freundlich one ( = 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 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.
制备了一种绿色整体淀粉冷冻凝胶，并采用间歇系统用于去除亚甲基蓝（MB）。研究了各种实验参数对MB吸附的影响。实现了较高的去除效率（81.58±0.59%）和吸附容量（34.84 mg/g）。与Freundlich模型（R² = 0.8542）相比，Langmuir模型能更好地拟合实验数据（决定系数R² = 0.9838），而MB在冷冻凝胶上的吸附动力学遵循准二级模型。吸附过程是自发的且吸热，活化能为37.8 kJ/mol，表明是物理吸附。该淀粉冷冻凝胶用于去除从泰国普吉岛当地一家蜡染生产社区企业采集的废水样品中的MB，去除效率达到75.6%，表明其作为去除MB的绿色吸附剂具有很高的潜力。
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