【摘要】 针对水质复杂、毒性组分多且厌氧生物处理困难的焦化废水，该文采用半胱氨酸（Cys）和Cu²⁺强化Fe³⁺/H₂O₂体系进行处理，结合COD、挥发酚、BOD/COD（B/C）等指标分析对废水可生化性的提高效果。通过探究反应过程中Fe²⁺/Fe³⁺含量、Cu²⁺/Cu⁺含量、H₂O₂和Cys的剩余量变化，以及活性物种的鉴定揭示了Fe³⁺/Cu²⁺/Cys/H₂O₂体系处理焦化废水的机理。结果表明：Cys和Cu²⁺强化Fe³⁺/H₂O₂体系处理后COD和挥发酚去除率相比于Fe³⁺/H₂O₂体系分别提高了15.4%、13.6%，且药剂添加量越多，Fe³⁺/Cu²⁺/Cys/H₂O₂体系对焦化废水的处理效果越好；通过B/C的变化发现焦化废水的可生化性得到了明显的提高，结合厌氧微生物处理后COD、挥发酚及毒性抑制物质的变化发现，焦化废水中以酚类为代表的生物毒害物质含量大幅度削减，可见Fe³⁺/Cu²⁺/Cys/H₂O₂体系可通过降低废水的毒性从而提高其可生化性；反应初期Cys将Fe³⁺、Cu²⁺迅速还原为Fe²⁺、Cu⁺并产生大量HO·攻击焦化废水中的有机污染物，随着反应的进行，Cu²⁺则通过与酚类污染物氧化降解产生的还原性中间产物快速反应，从而提高Fe³⁺向Fe²⁺还原的速率，进而进一步促进了Fe³⁺/Cu²⁺/Cys/H₂O₂体系对焦化废水的处理效果。该文证实了利用Cys和Cu²⁺强化Fe³⁺/H₂O₂体系处理焦化废水的可行性，揭示了强化机理，有利于后续生化处理的稳定运行。更多还原

【Abstract】 In the case of coking wastewater with a complex water quality and a high level of toxicity,as well as the additional difficulty of anaerobic biological treatment,the Fe³⁺/H₂O₂system reinforced with cysteine （Cys） and Cu²⁺was employed to treat the wastewater.The effect of this treatment on the improvement of wastewater biochemistry was then analysed in conjunction with the indicators of COD,volatile phenols and B/C.The mechanism of Fe³⁺/Cu²⁺/Cys/H₂O₂system for treating coking wastewater was demonstrated by exploring the changes in Fe²⁺/Fe³⁺content,Cu²⁺/Cu⁺content,H₂O₂and Cys residuals during the reaction process,as well as the identification of active species.The results demonstrated that the COD and volatile phenol removal after treatment with Cys and Cu²⁺reinforced Fe³⁺/H₂O₂system exhibited an increase of 15.4%and 13.6%,respectively,in comparison to the Fe³⁺/H₂O₂system.Furthermore,the findings indicated that Fe³⁺/Cu²⁺/Cys/H₂O₂system exhibited enhanced efficacy for the treatment of coking wastewater with an increase in the amount of agent added.Additionally,the bioavailability of coking wastewater was enhanced by the alteration of B/C.The biochemistry of coking wastewater was evidently enhanced,as evidenced by the alterations in COD,volatile phenols,and toxicity-inhibiting substances following anaerobic microbial treatment.The concentration of biotoxic substances,exemplified by phenols,in the coking wastewater was markedly diminished,indicating that Fe³⁺/Cu²⁺/Cys/H₂O₂system can mitigate the toxicity of the wastewater and consequently improve its biochemistry.At the outset of the reaction,the Cys rapidly reduces Fe³⁺and Cu²⁺to Fe²⁺and Cu²⁺,which are then reduced to Fe³⁺and Cu²⁺.At the beginning of the reaction,Cys rapidly reduces Fe³⁺and Cu²⁺to Fe²⁺and Cu⁺and generates a large amount of HO·to remove organic pollutants in coking wastewater.As the reaction progresses,Cu²⁺undergoes a rapid reaction with the reduced intermediate products generated by the oxidative degradation of phenolic pollutants,thereby enhancing the rate of Fe³⁺reduction to Fe²⁺and further improving the treatment efficiency of the Fe³⁺/Cu²⁺/Cys/H₂O₂system on coking wastewater.This research validates the feasibility of employing Cys and Cu²⁺to enhance the Fe³⁺/H₂O₂system for the treatment of coking wastewater,elucidates the underlying enhancement mechanism,and highlights its potential to facilitate the stable operation of subsequent biological treatment processes.更多还原