Fe配合物-UV催化臭氧降解含聚污水

采用Fe螯合物 UV催化臭氧氧化处理含聚污水，以降解污水中的聚丙烯酰胺(PAM)。考察了螯合剂类型对催化臭氧氧化效能的影响，优化了催化剂配比，并探讨Fe螯合物 UV催化臭氧的可生化性及动力学特性。结果表明，与邻二氮菲相比，乙二胺四乙酸（EDTA）与Fe(Ⅱ)形成的螯合物催化臭氧降解PAM的效果较好，在Fe(Ⅱ)/EDTA 摩尔浓度比为1的条件下，在水力停留时间(HRT)达到120 min时，含聚污水的PAM去除率可达75%，生物需氧量/化学需氧量比也从0121提升至0423，可生化性显著提高。〖JP2〗此外，Fe螯合物 UV催化臭氧〖JP3〗氧化反应符合二级动力学反应， PAM初始质量浓度在 50~100 mg/L范围时，该二级反应速率常数在(2195~3052)×10-4 L/(mg·min)之间，表明在有效的氧化降解时间内，金属螯合物 UV催化臭氧氧化工艺可以产生稳定的·OH。

Degradation of Polymer Contained Sewage by Fe Chelate-UV Catalytic Ozonation Process

Fe-chelate-UV catalytic ozonation technique was used to degrade polyacrylamide (PAM) in polymer contained sewage. The efficiency of Fe chelate UV catalytic ozonation to degrade PAM was studied through selecting appropriate chelating agent and optimizing ratio of catalysts, followed by the discussion on the biodegradability and kinetics. The results showed that compared with 1〖DK〗,10 phenanthroline, EDTA had the ability of forming more stable Fe chelate with Fe(Ⅱ) which has a better catalytic effect of PAM degradation. The PAM removal rate in the solution reached 75% and the biochemical oxygen demand/chemical oxygen demand (B/C) jumped from 0121 to 0423 with the biodegradability being significantly improved under the conditions of Fe(Ⅱ) and EDTA molar concentration ratio of 1 and the hydraulic retention time (HRT) of 120 min. In addition, the reaction of Fe chelate UV catalytic ozonation with PAM was conformed to the second order kinetics with the rate constant within (2195-3052)×10-4 L/(mg·min), when the initial PAM mass concentration in the solution was in the range of 50-100 mg/L, indicating that metal chelate catalytic ozonation process has the ability to produce a steady number of ·OH during the valid time of oxidizing degradation.