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Biodecolorization of Reactive Red 120 in batch and packed bed column using biochar derived from Ulva reticulata
Biomass Conversion and Biorefinery ( IF 4 ) Pub Date : 2021-01-06 , DOI: 10.1007/s13399-020-01268-x
Madhu Kumar , Ravindiran Gokulan , Sivarethinamohan Sujatha , Siva Pathanjali Shanmuga Priya , Saravanan Praveen , Sellappan Elayaraja

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.



中文翻译:

分批和填充床柱中活性红120的生物炭脱色

海藻石va用于合成生物炭,并用于去除活性红120(R120)。发现最佳热解温度为300°C,并通过对生物炭的近因和元素分析确定。通过分批和连续进行实验,探索了这种生物炭的实际适用性。上流式填充床反应器用于研究连续模式下活性红120的去除。研究了溶液的pH值,接触时间,生物炭用量,温度,初始浓度等操作参数。四参数模型Fritz-Schlunder-IV和伪一级动力学模型最适合实验吸收,相关系数分别为0.9996和0.9951。最大去除效率和吸收能力分别为84.2%和210。在pH为2的操作条件下获得5 mg / g,生物炭的剂量为2 g / L,温度为30°C,初始浓度为500 mg / L。研究了分配系数以克服吸附容量的限制,在100%穿透时间获得最高分配系数为4.13 L / g,去除效率和吸收容量分别为89.2%和111.5 mg / g。热力学研究得出结论,反应是自发的并且是吸热的。连续研究得出结论,在床深为25 cm,流速为0.48 L / h,初始染料浓度为250 mg / L的操作条件下,吸收能力为100.71 mg / g。研究了分配系数以克服吸附容量的限制,在100%穿透时间获得最高分配系数为4.13 L / g,去除效率和吸收容量分别为89.2%和111.5 mg / g。热力学研究得出结论,反应是自发的并且是吸热的。连续研究得出结论,在床深为25 cm,流速为0.48 L / h,初始染料浓度为250 mg / L的操作条件下,吸收能力为100.71 mg / g。研究了分配系数以克服吸附容量的限制,在100%穿透时间获得最高分配系数为4.13 L / g,去除效率和吸收容量分别为89.2%和111.5 mg / g。热力学研究得出结论,反应是自发的并且是吸热的。连续研究得出结论,在床深为25 cm,流速为0.48 L / h,初始染料浓度为250 mg / L的操作条件下,吸收能力为100.71 mg / g。

更新日期:2021-01-07
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