改性沼渣生物质炭活化过硫酸盐降解酚类性能

通过高温热解+稀盐酸改性制备改性沼渣生物质炭(ZBC-800),研究了ZBC-800活化过硫酸盐(PS)的效能,考察了活化剂、PS投加量、初始pH值对苯酚降解效果的影响,并实际运用于含酚类焦化废水TOC去除.结果表明,ZBC-800活化PS对苯酚去除效果显著,120min去除率达到91.58%,体系中主要通过产生¹O₂的非自由基途径降解苯酚;苯酚的去除效率随着ZBC-800投加量增加而提升,但高浓度PS会起到一定的抑制;不同初始pH值(4.10、6.80、8.40、10.00)对苯酚的降解效果基本没有影响,最终去除效率范围为91.58%~93.10%;针对实际含酚焦化废水,在初始pH=3、8.94g/L ZBC-800和0.5g/L PS体系下,TOC去除率达86.09%.表明ZBC-800可高效活化PS降解苯酚,效果显著,并在实际废水中表现出较好的降解能力,具有一定的应用前景.

Study on the performance of modified biogas residue biomass charcoal to activate persulfate to degrade phenols

Modified biogas residue biochar (ZBC-800) was prepared by high temperature pyrolysis + dilute hydrochloric acid modification. The efficiency of persulfate (PS) activation by ZBC-800was studied, and the effect of activator, dosage of PS and initial pH on the degradation of phenol was investigated, and it was applied on the TOC removal of coking wastewater containing phenols for a practical valuation. The results show that: ZBC-800activated PS has a significant effect on phenol removal, with a removal rate of 91.58% in 120minutes. It is found that the system relies on a non-radical pathway that produces ¹O₂; the efficiency of phenol removal shows a positive correlation with the dosage of ZBC-800, but high concentration of PS does inhibit the reaction; different initial pH values (4.10, 6.80, 8.40, 10.00) have no significant effect on the degradation of phenol, and the final removal efficiency ranges from 91.58% to 93.10%; in the actual treatment of phenol-containing coking wastewater, the combination of an initial pH=3, a ZBC-800 dosage of 8.94g/L and the PS system of 0.5g/L, the TOC removal rate reached 86.09%. Therefore, ZBC-800can efficiently activate PS to significantly degrade phenol, and also shows good degradation ability in actual wastewater, and has certain application prospects.