Degradation of Rhodamine B in water by heat/persulfate process

Background: This investigation concerns the effectiveness of the heat/persulfate process in the degradation of Rhodamine B (RhB) in water. Methods: The dependences of the efficiency and rate of degradation of RhB by the heat/persulfate process on the temperature, initial concentration of RhB, and Na2S2O8 concentration were examined. Significant findings: The degradation of RhB by the heat/persulfate process followed pseudo-first-order kinetics. The efficiency and rate of degradation of RhB at 70 degrees C dramatically exceeded those at 30 degrees C. At 70 degrees C, increasing the initial concentration of RhB reduced the efficiency and rate of degradation of RhB. At 70 degrees C, the efficiency and rate of degradation of RhB increased with Na2S2O8 concentration. The heat/persulfate process at 70 degrees C with an initial concentration of RhB of 5 mg/L and an Na2S2O8 concentration of 32 mM completely degraded RhB in 7 min, revealing that the heat/persulfate process is highly effective in the degradation of RhB in water. (c) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Automated summary

This investigation evaluates the effectiveness of the heat/persulfate process in degrading Rhodamine B in water. The results show that the process follows pseudo-first-order kinetics and is highly efficient at 70 degrees Celsius. The efficiency and rate of degradation are influenced by temperature, initial concentration, and Na2S2O8 concentration.