林产化学与工业2017，Vol.37Issue(6)：56-64,9.DOI:10.3969/j.issn.0253-2417.2017.06.008
γ-Al2O3负载二元金属氧化物催化臭氧深度处理制浆废水
Catalytic Ozonation Advanced Treatment of Pulping Effluent Catalyzed by γ-Al2 O3 Loaded with Binary Metal Oxides
摘要
Abstract
A loading binary metal oxide Mn-Ni/γ-Al2 O3 catalyst was synthesized withγ-Al2 O3 as support and with the transition metals Mn, Ni as active ingredients. The catalyst was characterized by XRD, XRF, BET. Then the catalyst was used for the ozonation advanced treatment of pulping effluent. The relationship between wastewater CODcr and affecting factors was established via the response surface analysis with Box-Behnken mathematical model. The results showed that the Mn and Ni were loaded on the surface and in the internal hole-channel successfully; After the load of these metals, the particle size decreased, and the specific surface area, pore volume and average pore size decreased by 11. 96%, 16. 48% and 5. 28% respectively. The optimal condition for treatment was initial pH 8. 7, catalyst dosage 9. 2 g/L and ozone concentration 29. 6 mg/L. Under this condition, the removal rates of CODCr and AOX with Mn-Ni/γ-Al2O3(mole ratio of Mn and Ni 6:4) as catalyst were 75. 1% and 85. 98%after 30 min treatment (40 ℃). Furthermore, the removal rate for this catalyst still reached 70. 6% after being repeatedly used for 6 times. And the ionic releases of Mn and Ni was remained below 1 mg/L during the reaction, indicating of the high stability and good performance of the Mn-Ni/γ-Al2 O3 catalyst had for repeated use.关键词
深度处理/γ-Al2O3/臭氧氧化/制浆废水/响应面分析Key words
advanced treatment/γ-Al2 O3/ozone oxidation/pulping effluent/response surface analysis分类
化学化工引用本文复制引用
王聪聪,莫立焕,杨珍,李军,徐峻,谈金强..γ-Al2O3负载二元金属氧化物催化臭氧深度处理制浆废水[J].林产化学与工业,2017,37(6):56-64,9.基金项目
国家水体污染控制与治理科技重大专项(2014ZX07213001) （2014ZX07213001）
