摘要
采用Fe(II)(EDTA)螯合物/UV催化臭氧降解聚丙烯酰胺(PAM)溶液,探讨水力停留时间(HRT)、单独臭氧和Fe(II)(EDTA)螯合物催化臭氧对PAM溶液粘度和PAM去除率的影响,研究生化需氧量与化学需氧量之比(B/C)随HRT变化的规律,考察Fe(II)(EDTA)螯合物/UV催化臭氧体系对PAM溶液可生化效能影响;研究表面活性剂对Fe(II)(EDTA)螯合物/UV催化臭氧工艺降低PAM粘度的影响,并探讨草酸对该工艺降解PAM溶液影响规律。结果表明,Fe(II)(EDTA)螯合物/UV催化臭氧法对PAM溶液降解效能良好,在15min内,PAM溶液的粘度可以降低57%,在120min后,PAM去除率可达75%,B/C从0.121提升到0.423。表面活性剂对Fe(II)(EDTA)螯合物/UV催化臭氧工艺降低PAM溶液粘度影响较小。草酸不利于Fe(II)(EDTA)/UV催化臭氧工艺去除PAM和降低PAM溶液粘度,这是因为草酸造成的酸性环境抑制了臭氧在水中的分解作用,从而导致草酸/Fe(II)(EDTA)/O3体系中PAM溶液的降粘效果和去除率低于Fe(II)(EDTA)/O3体系。
The polyacrylamide（ PAM） solution was treated by using Fe（ II）（ EDTA） chelate / UV catalytic ozonation process. The effect of hydraulic retention time（ HRT）,single O3 and the system of Fe（ II）（ EDTA）chelate / UV catalytic ozonation on viscosity and PAM removal rate of the solution were analyzed in detail. The change rule of B / C with the variation of HRT and the efficiency of the system on biodegradability of PAM solution were investigated. Moreover,the effect of surfactant and oxalic acid on the process to oxidize PAM solution was also discussed separately. The result showed that the method can well degrade the PAM solution. The viscosity of the PAM solution is decreased 57% in the first 15 min,the PAM removal rate is up to 75% and the B / C ratio is improved from0. 121 to 0. 423 by a large margin within 120 min. The surfactant only has a small influence on the process to reduce the solution viscosity. In addition,because acidic condition caused by adding oxalic acid restrains the decomposition of O3 in aqueous solution,it is not conducive to the catalytic ozone oxidation degradation process,and the viscosity reduction efficiency and PAM removal rate of the solution in oxalic acid / Fe（ II）（ EDTA） / O3 system is lower than that in Fe（ II）（ EDTA） / O3 system.
出处
《化学通报》
CAS
CSCD
北大核心
2016年第4期372-376,共5页
Chemistry
基金
黑龙江省自然科学基金项目(B2015012)
黑龙江省博士后项目(161260)资助
