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

Waste Management
Ana Karen TovarIrma Robles

Abstract

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 H3PO4 [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 pr...Continue Reading

Citations

Aug 3, 2019·Polymers·Jonnys P CastroGustavo H D Tonoli
Oct 21, 2020·Foods·Tri Thanh NguyenCristina Ratti
Aug 8, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Stephanie GiraldoElizabeth Flórez
Aug 7, 2021·Environmental Science and Pollution Research International·Bianca de Paula RamosRosane Freire Boina

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