Optimization of the integral valorization process for orange peel waste using a design of experiments approach: Production of high-quality pectin and activated carbon.

Autor: Tovar AK; Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Parque Tecnológico Querétaro, 76703 Sanfandila, Pedro Escobedo, Querétaro, Mexico., Godínez LA; Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Parque Tecnológico Querétaro, 76703 Sanfandila, Pedro Escobedo, Querétaro, Mexico., Espejel F; Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Parque Tecnológico Querétaro, 76703 Sanfandila, Pedro Escobedo, Querétaro, Mexico., Ramírez-Zamora RM; Universidad Nacional Autónoma de México (UNAM), Instituto de Ingeniería, Coordinación de Ingeniería Ambiental, 04510 Ciudad de México, Mexico., Robles I; Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Parque Tecnológico Querétaro, 76703 Sanfandila, Pedro Escobedo, Querétaro, Mexico. Electronic address: irobles@cideteq.mx.
Jazyk: angličtina
Zdroj: Waste management (New York, N.Y.) [Waste Manag] 2019 Feb 15; Vol. 85, pp. 202-213. Date of Electronic Publication: 2018 Dec 31.
DOI: 10.1016/j.wasman.2018.12.029
Abstrakt: The aim of this study was to optimize the integral valorization of orange peel waste by obtaining activated carbon after a process of pectin recovery in recycling of orange peel by transformation to value-added products of pectin extraction and activated carbon preparation. The study was supported by statistical analysis, and the significant factors and optimal conditions were obtained from the statistical analysis. Using a representative sample of orange peel waste, a yield of 29.37% pectin was recovered at the optimal operating conditions (phosphoric acid as the extraction agent, 95 °C as the impregnation temperature and a 2-hour extraction time). Activated carbon (AC) was prepared from the remaining solid residue. The conditions that improve the resulting material quality were H 3 PO 4 [0.6 M] used as the activating agent, an impregnation temperature of 95 °C, a carbonization temperature of 400 °C and 1 h of carbonization time. The obtained AC showed a sorption capacity of 2342.91 mg g -1 , a value higher than that reported for commercial activated carbon. Using a model dye chemical, the sorption kinetics and thermodynamics of AC were found to follow a pseudo-second-order rate and the Freundlich models, respectively. Using the process conditions obtained in this study, it was possible to optimize the yield and also obtain good-quality products from valorization of orange peel.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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