Degradation of 2,4-Dinitrophenol using persulfate activated by Cu~(2+) in photocatalytic system (UV/SPS/Cu~(2+)) from aqueous solution: optimisation and operational parameters

摘要

The present study was developed to model and optimise 2,4-Dinitrophenol (2,4-DNP) degradation from aqueous solution using UVC/SPS/Cu2+ system based on the response surface methodology (RSM) and Box-Behenken (BBD) approach. A high removal efficiency (92.75) and total organic carbon (TOC) reduction (61.5) were obtained under optimum conditions, i.e. (Time = 59 min, SPS Con. = 58.74 mg/L, Cu2+ Con = 14.12 mg/L, pH = 11, Initial Con = 6 mg/L). Quenching experiments confirmed that sulphate radicals were predominant radical species for 2-4-DNP degradation. The effect of CO3- on 2,4-DNP degradation was more complicated than other aquatic background anions. Finally, the performance of UVC/SPS/Cu2+ system for 2,4-DNP treatment in different aquatic solutions: tap water, surface runoff, treated and raw wastewater were found to be 89.76, 81.65, 51.22 and 75.94, respectively.