Title:
Optimization of Extraction of Silica from Pulp Waste Using Empirical Modelling Approach
Author(s):
Bhengu, N.P., Farirai, F., Sadare, O., Daramola, M.O.
Document(s):
Paper
Abstract:
In this study, response surface methodology (RSM) was used to optimize the effect of the four operating variables (temperature, NaOH concentration, NaOH solution to waste ratio and extraction time) on the extraction of silica,SiO2, from pulp waste ash (PWA) using sol gel method.. A set of 30 experiments were designed using central composite design (CCD). A linear equation was proposed to describe SiO2 extraction from PWA, under the influence of the operating variables considered in this study. Although the model for SiO2 extraction from PWA gave a p value of 0.0007, the R2 value of 0.5240 was also given by the model, which shows poor correlation between the observed and the predictive values for SiO2 extraction from PWA. About 48 % of the data cannot be explained by the model. R2 value needs to be >0.75 in order to indicate aptness of the model. Additionally, results of the cross-validation of the model showed an error of about 42 %. However, this study provide a platform for further improvement by considering other model candidates that will accurately describe the bevaiour observed in this study.
Keywords:
waste disposal, paper, silica, pulp waste
Topic:
Biomass Conversion to Intermediate Bioenergy Carriers, Sustainable Biofuels and Bio-Based Products
Subtopic:
Bio-Based Chemicals and Materials
Event:
29th European Biomass Conference and Exhibition
Session:
3BV.10.8
Pages:
889 - 895
ISBN:
978-88-89407-21-9
Paper DOI:
10.5071/29thEUBCE2021-3BV.10.8
Price:
FREE
