Journal
KOREAN JOURNAL OF CHEMICAL ENGINEERING
Volume 38, Issue 7, Pages 1499-1509Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-021-0801-9
Keywords
Adsorption; Biochar; Box-Behnken Design; Methylene Blue; Pomegranate Peel; Sulfuric Acid
Funding
- King Saud University
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The sulfonated pomegranate peel biochar (SPPBC) was developed as a promising adsorbent for the removal of methylene blue (MB) dye from contaminated water. Optimization of adsorption variables using a Box-Behnken design and numerical desirability function revealed high MB dye removal rates with potential for further applications in wastewater treatment.
Sulfonated pomegranate (Punica granatum) peel biochar (SPPBC) was developed via thermal activation with sulfuric acid (H2SO4) to act as a promising biochar material for the adsorptive removal of toxic cationic dye namely methylene blue (MB) dye from contaminated water. A Box-Behnken design (BBD) and numerical desirability function were adopted to optimize the input adsorption variables (SPPBC dosage, temperature, pH, and contact time). The maximum removal of the MB dye can be accomplished by simultaneous significant interaction between SPPBC dosage with solution pH, SPPBC dosage with time, SPPBC dosage with temperature, solution pH with time, and time with temperature. The numerical desirability function identified the highest MB dye removal (93.9%) can be achieved at the following optimum numerical adsorption conditions: SPPBC dosage 0.18 g, temperature 49 degrees C, pH 9.7, and time 4.3 h. Equilibrium data were well fitted to the Temkin and Langmuir isotherm models. The maximum recorded adsorption capacity of SPPBC for MB dye adsorption by using Langmuir isotherm model was 161.9mg/g. This research work reveals the possibility of converting lignocellulose pomegranate peel into a renewable and environment-friendly biochar via a relatively fast acid-activation process with the great potential to be promising adsorbent for removal of MB dye.
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