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Lookup NU author(s): Dr Jie ZhangORCiD
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© 2022 The Institution of Chemical Engineers. Water contaminated by methylene blue (MB) dye was treated with activated carbon based on locally collected jujube stones. This activated carbon was characterized by physico-chemical methods after preparation and chemical activation. Response surface methodology (RSM) was used to maximize the MB uptake a dependent variable in Box-Behnken Design (BBD) with the initial concentration of methylene blue (400–700 mg/L), adsorbent dosage (0.6–1.6 g/L), contact time (30–540 min), pH (7−11) and temperature (20–50 °C) as independent variables. Then, the database created by BBD was further modeled using Gaussian Process Regression coupled with Bagging (Bootstrap Aggregation_Bag) and Dragonfly optimization algorithm (GPR_DA_Bootstrap). The results of the optimization analysis using the GPR_DA_Bootstrap model are shown to be superior to those of the BBD model. The experimental validation of the optimal conditions of the GPR_DA_Bootstrap model (X1 = 700 mg/L, X2 = 0.6 g/L, X3 = 540 min, X4 = 11, and X5 =50 °C) led to an MB uptake (501.01 mg/g) significantly higher than that of BBD (456.00 g/g). In addition, the very low error between the experimental and the predicted values given by the GPR_DA_Bootstrap model (8.64 mg/g) compared to that of the BBD model (22.19 mg/g), should be highlighted. This clearly shows the efficiency and the performance of the GPR_DA_Bootstrap model on the one hand; as well as the effectiveness of activated carbon prepared from jujube stones (PJAC) as a low-cost adsorbent on the other hand.
Author(s): Bouchelkia N, Tahraoui H, Amrane A, Belkacemi H, Bollinger J-C, Bouzaza A, Zoukel A, Zhang J, Mouni L
Publication type: Article
Publication status: Published
Journal: Process Safety and Environmental Protection
Year: 2023
Volume: 170
Pages: 513-535
Print publication date: 01/02/2023
Online publication date: 14/12/2022
Acceptance date: 09/12/2022
ISSN (print): 0957-5820
ISSN (electronic): 1744-3598
Publisher: Institution of Chemical Engineers
URL: https://doi.org/10.1016/j.psep.2022.12.028
DOI: 10.1016/j.psep.2022.12.028
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