γ-Al_2O_3催化臭氧深度处理蔗渣制浆废水  

Advanced Treatment of Bagasse Pulping Effluent viaγ-Al_2O_3-Catalyzed Ozonation

作　　者：莫立焕[1] 谈金强 王聪聪[1] 徐峻[1] 李军[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2017年第2期144-152,共9页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07213001)~~

摘　　要：对单独臭氧氧化处理制浆废水与γ-Al_2O_3催化臭氧深度处理制浆废水进行了对比研究,结果表明:γ-Al_2O_3对臭氧具有一定的催化作用,能够显著提高废水的COD_(Cr)去除率;随着主要影响因素pH值、反应温度、臭氧浓度和催化剂用量的增加,COD_(Cr)去除率均先增大后降低;同时,γ-Al_2O_3催化臭氧还能够有效地降低废水中AOX(可吸附有机卤化物)的含量;实验室条件下,处理30 min,AOX去除率可达80.4%.文中还采用扫描电镜对再生前后的γ-Al_2O_3、采用UV和GC-MS对处理前后的废水进行分析,结果显示,γ-Al_2O_3催化臭氧能大幅降低废水中的有机物种类和含量,并且能较好地降解难生物降解的有机物,其作为催化剂具有良好的稳定性,重复使用8次后,经过焙烧再生,仍可保持88.5%的催化活性.In this paper, a comparison was carried out between the ozone oxidation and the γ-Al2O3-catalyzed ozo-nation for the treatment of bagasse pulping effluent. The results show that （1） γ-Al2O3 has a certain catalytic effect on ozone and can significantly improve the removal rate of CODCr ; （2） with the increase of pH value, reaction tem-perature, ozone concentration and catalyst dosage, the removal rate of CODCr first increases and then decreases; （3） the catalytic ozonation by γ-Al2O3 can also effectively remove the content of AOX （ Absorbable Organic Halo-gen） in the pulping effluent; and （4） in laboratory conditions, the removal rate of AOX reaches 80. 4 % after a treatment for 30 min. Moreover, it is demonstrated by the UV and GC-MS results before and after the advanced treatment that γ-Al2O3-catalyzed ozonation can significantly reduce the type and content of organic matters in the ef-fluent and effectively degrade hard biodegradable organic matters; and that γ-Al2O3 is of good stability and repeti-tion ,concretely, after being reused for eight times, it still keeps 88. 5% of the catalytic activity.

关 键 词：制浆废水 臭氧化 Γ-氧化铝 催化活性 

分 类 号：X793[环境科学与工程—环境工程]