{'fraction_non_alphanumeric': 0.040117416829745595, 'fraction_numerical': 0.023483365949119372, 'mean_word_length': 5.162650602409639, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Treatment of dinitrodiazophenol industrial wastewater by an ozone/persulfate process

An ozone-persulfate (O3-PS) process was used to treat dinitrodiazophenol (DDNP) industrial wastewater. Under optimized operational parameters, such as O3 flow rate of 0.250 L/min, reaction temperature of 70°C, PS dose of 2 g/L, and initial pH of 4.5, the treatment efficiencies of O3-PS and other processes (O3, PS, and thermal/PS) were compared. The results revealed that the chemical oxygen demand and color number removal efficiencies of O3-PS process were 90.66% and 96.99%, respectively. The treatment efficiency of O3-PS process was obviously higher than that of other processes examined. Ultraviolet-visible spectra analysis showed that the O3-PS process had a significant effect on the degradation of benzene-ring compounds in wastewater, and that the chromophores and auxochrome groups were completely degraded. In conclusion, this study provides a theoretically feasible method for the treatment of DDNP industrial wastewater.