Model for evaluation of Phosphorus Removal Based on Its As-Beneficiated Content and Input Concentration of H2O2

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Author(s) T. O. Chime | O.D. Onukwuli
Pages 206-211
Volume 4
Issue 4
Date April, 2014
Keywords Shale, drilling fluid, wellbore stresses, tensile strength, linear elastic, Mohr coulomb failure criterion

Abstract

Predictive analysis of phosphorus removal was carried out based on its as-beneficiated content and input concentration of hydrogen peroxide. A two factorial model was derived, validated and then used as a tool for the analysis. The model is expressed as;

PR = 0.00002β2 + 0.0001β + 2θ 2 + 0.1θ - 0.161

The validity of the model was found to be rooted on the expression PR - 2θ 2 - 0.1θ = 0.00002β2 + 0.0001β - 0.161 where both sides of the expression are correspondingly approximately equal. Statistical analysis of the model-predicted and experimentally removed phosphorus concentrations for each value of the input concentration of hydrogen peroxide considered shows standard errors of 1.86 x 10-4 and 3.16 x 10-4 % respectively. Furthermore, removed phosphorus concentration per unit input concentration of hydrogen peroxide as obtained from model-predicted and experimental results were 3.38 x 10-4 and 3.75 x 10-4 %/M respectively. Deviational analysis indicates that the maximum deviation of the model-predicted removed phosphorus concentration (from experimental results) is less than 2%. This implies that the derived model operates with a confidence level of above 98%.

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