A novel humic acid-derived carbon/sulfite system for efficient elimination of pharmaceuticals: Performance, mechanism, toxicity evaluation, and application feasibility
著者
和文:
Wei Yang,
Yan Zou,
Zhihui Pang,
Yanrong Zhang,
ZOU Yangzhenchuan,
Zhihui Pang,
Yanrong Zhang,
藤井 学.
英文:
Wei Yang,
Yan Zou,
Zhihui Pang,
Yanrong Zhang,
Yan Zou,
Zhihui Pang,
Yanrong Zhang,
Manabu Fujii.
Sulfite [S(IV)] activation processes have aroused increasing attention in the field of wastewater treatment. In this study, a novel humic acid-derived carbon (HAC-10) material was demonstrated as highly active and environmentally friendly S(IV) activator for the efficient elimination of recalcitrant pharmaceutical contaminants. The results suggested that quinone groups and conductivity served as the active site/structure for S(IV) activation, while the rapid adsorption process of contaminant significantly reduced the migration distance of generated SO4[rad]?, thus facilitating the degradation processes. The carbon?S(IV)* complexes were confirmed to be the primary step to produce SO4[rad]?. The mineralization process of tetracycline hydrochloride (TC, a model pharmaceutical) could effectively reduce its biological toxicity. In addition, S(IV)/HAC-10 system exhibited excellent adaptability to different pharmaceuticals, natural water matrix and was capable of effectively eliminating contaminants in actual wastewater. Furthermore, a continuous flow reactor consisting of HAC-10 catalyst membrane showed excellent reactivity and durability. Overall, this study provides novel insights into the activation mechanism of S(IV) by carbon materials, and advances the practical application of S(IV) activation processes in the decontamination and detoxification of pharmaceutical wastewater.
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