Synthesis and Characterization of Silica gel from Dealuminated Kaolin Industrial Residue for a Targeted Application of Dye Removal

Abstract

The Dealuminated Kaolin Residue Is The Tailings Generated From The Production Process Of Aluminum Sulphate Industry And Is Mainly Stacked In An Open Air At Present, So How To Ensure The Extraction Of Silica Gel From The Stockpile Is Important, This Was Examined For Its Effectiveness In Removing Of Methylene Blue Dye From Wastewater. Excess Methylene Blue Dye In The Human Body Can Lead To Various Health Problems. Therefore, It Is Crucial To Remove Methylene Blue From Wastewater. Physical, Chemical, And Biological Technologies Have Been Used For Dye Removal, But They Have Limitations Regarding Cost And Complexity In Achieving The Required Concentration Level. The Adsorption Process Is A Preferred Technologies Based On Its Simple Design, Versatility, Lowest Cost, And Reusability. This Work Aimed To Synthesize And Characterize Silica Gel For Removing Methylene Blue Dye From Wastewater. Silica Gel Was Synthesized By The First Step Was Extraction Sodium Silicate From Swr By Reacting With Caustic Soda For 2 Hours At 80 ??C With 1:10 Solid Liquid Ratio. And The Synthesis Of Silica Gel Was Carried Out By Acidifying The Silicate Solution With Sulfuric Acid And Followed By Sol-Gel Method. Aas, Xrd, Ftir, Sem, Bet, And Tga Were Used To Characterize The Chemical Composition, Crystalline Structure, Specific Functional Groups, Morphological Properties, Specific Surface Area, And Thermal Stability Of Silica Gel. The Bet-Specific Surface Area Of Silica Gel Was Determined To Be 444.54 M2/G. Moreover, The Optimization Effects Of Adsorption Parameters Such As Contact Time, Adsorbent Dose, Ph, And Initial Methylene Blue Dye Concentration Were Carried Out, And The Results Confirmed That 94.95% Of Mb Dye Was Removed From Synthetics And 90.61 From Wastewater At An Optimum Time Of 120 Min, A 0.03 G Adsorbent Dose, A Ph Level Of 7.99, And 15 Mg/L Of Initial Mb Dye Concentration. Furthermore, Equilibrium Isotherm, Kinetics, And Thermodynamic Properties Of The Adsorption Process Were Examined. The Adsorption Isotherm Data Were Best Fitted To The Langmuir Model With A Maximum Adsorption Capacity Of 85.18 Mg/G. The Results Of The Kinetic Model Proved That The Pseudo-Second-Order Model Provided A Good Description Of The Experimental Data With A Maximum R2Of 0.999. The Results Of The Thermodynamic Parameters Demonstrated That The Adsorption Process Is Spontaneous And Endothermic. The Removal Efficiency Of 62.75% Of Mb Was Found After Three Cycles Of Desorption And Adsorption, Indicating The Wonderful Reusability Of The Adsorbent. The Results Illustrate That Silica Gel Is An Excellent And Promising Adsorbent For Removing Methylene Blue Dye From Wastewater.