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Microwave-Hydrothermal Treated Grape Peel as an Efficient Biosorbent for Methylene Blue Removal

by Lin Ma 1, Chunhai Jiang 2,*, Zhenyu Lin 3 and Zhimin Zou 2,*
1
Department of Industry and Academy Collaborative Development, Xiamen University of Technology, 600 Ligong Road, Jimei District, Xiamen 361024, China
2
Fujian Provincial Key Laboratory of Functional Materials and Applications, Institute of Advanced Energy Materials, School of Materials Science and Engineering, Xiamen University of Technology, 600 Ligong Road, Jimei, Xiamen 361024, China
3
MOE Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, Institute of Nanomedicine and Nanobiosensing, College of Chemistry, Fuzhou University, Fuzhou 350116, China
*
Authors to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2018, 15(2), 239; https://doi.org/10.3390/ijerph15020239
Received: 28 December 2017 / Revised: 24 January 2018 / Accepted: 25 January 2018 / Published: 31 January 2018
Biosorption using agricultural wastes has been proven as a low cost and efficient way for wastewater treatment. Herein, grape peel treated by microwave- and conventional-hydrothermal processes was used as low cost biosorbent to remove methylene blue (MB) from aqueous solutions. The adsorption parameters including the initial pH value, dosage of biosorbents, contact time, and initial MB concentration were investigated to find the optimum adsorption conditions. The biosorbent obtained by microwave-hydrothermal treatment only for 3 min at 180 °C (microwave-hydrothermal treated grape peel, MGP) showed faster kinetics and higher adsorption capability than that produced by a conventional-hydrothermal process (hydrothermal treated grape peel, HGP) with a duration time of 16 h. The maximum adsorption capability of MGP under the optimum conditions (pH = 11, a dosage of 2.50 g/L) as determined with the Langmuir model reached 215.7 mg/g, which was among the best values achieved so far on biosorbents. These results demonstrated that the grape peel treated by a quick microwave-hydrothermal process can be a very promising low cost and efficient biosorbent for organic dye removal from aqueous solutions. View Full-Text
Keywords: grape peel; biosorbent; biosorption; methylene blue; wastewater treatment grape peel; biosorbent; biosorption; methylene blue; wastewater treatment
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Ma, L.; Jiang, C.; Lin, Z.; Zou, Z. Microwave-Hydrothermal Treated Grape Peel as an Efficient Biosorbent for Methylene Blue Removal. Int. J. Environ. Res. Public Health 2018, 15, 239.

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