Biodecolorization of Reactive Red 120 in batch and packed bed column using biochar derived from Ulva reticulata

被引:0
作者
Madhu Kumar
Ravindiran Gokulan
Sivarethinamohan Sujatha
Siva Pathanjali Shanmuga Priya
Saravanan Praveen
Sellappan Elayaraja
机构
[1] Government College of Technology,Department of Civil Engineering
[2] GMR Institute of Technology,Department of Civil Engineering
[3] K. Ramakrishnan College of Technology,Department of Civil Engineering
[4] Mohamed Sathak Engineering College,Department of Chemical Engineering
[5] PSG Institute of Technology and Applied Research,Department of Civil Engineering
来源
Biomass Conversion and Biorefinery | 2023年 / 13卷
关键词
Biochar; Modeling; Packed bed; Reactive red 120;
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中图分类号
学科分类号
摘要
A seaweed Ulva reticulata was used to synthesis biochar, and it was used in the removal of Reactive Red 120 (R120). The optimum thermal pyrolysis temperature was found to be 300 °C, and it was confirmed by proximate and elemental analysis of the biochar. The practical applicability of this biochar was explored by conducting the experiments in batch and continuous mode. An up-flow packed bed reactor was used to study the removal of reactive red 120 in continuous mode. The operating parameters like solution pH, contact time, biochar dosage, temperature, initial concentration were studied. A four-parameter model Fritz-Schlunder-IV and pseudo-first-order kinetic model best fitted the experimental uptake with a correlation coefficient of 0.9996 and 0.9951, respectively. The maximum removal efficiency and uptake capacity of 84.2% and 210.5 mg/g were obtained at operating conditions of pH of 2, biochar dosage of 2 g/L, temperature of 30 °C, and initial concentration of 500 mg/L. The partition coefficient was studied to overcome the limitation of the adsorption capacity, and the highest partition coefficient was obtained as 4.13 L/g at 100% breakthrough time with a removal efficiency and uptake capacity of 89.2% and 111.5 mg/g. The thermodynamic study concluded that reactions are spontaneous and endothermic. The continuous study concluded that the uptake capacity of 100.71 mg/g was obtained at operating conditions of bed depth of 25 cm, the flow rate of 0.48 L/h, and initial dye concentration of 250 mg/L.
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页码:1707 / 1721
页数:14
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