摘要
为高效处理低浓度含酚废水,提出非均相催化臭氧化工艺。采用浸渍法,分别制备了Fe2O3和多组分两种非均相催化剂,并对催化剂进行相组成分析和对比筛选,考察了工艺条件及钠盐含量对化学需氧量(COD)和总有机碳含量(TOC)去除率的影响。结果表明,两种催化剂均具有一定催化作用,且多组分催化剂催化效果更佳。降解较佳条件:COD为500 mg×L^-1,进料温度为30℃,进料pH为11.00,催化剂用量2 g×L^-1,反应时间90 min,臭氧浓度60mg×L^-1,气体流量1 L×min^-1,COD和TOC去除率分别达到96.56%和89.63%。分别加入NaCl和Na2SO4两种盐对降解体系均有一定抑制作用,NaCl尤为明显,混合盐对体系的影响主要受NaCl含量控制,并由于溶液效应影响小于NaCl单盐。
Wastewater with low concentration of phenolic chemicals was treated by an ozonation process with high-efficiency heterogeneous catalysts. Fe2O3 and multi-component catalysts prepared by an impregnation method were studied by phase composition analysis and reaction activity tests. The effects of process conditions and sodium salt contents on the removal of chemical oxygen demand(COD) and total organic carbon(TOC) were investigated. Both catalysts have catalytic effects and the multi-component catalyst shows better performance. When studied under conditions of COD = 500 mg×L^-1, catalyst dosage = 2 g×L^-1, ozone concentration = 60 mg×L^-1 and gas flow rate = 1 L×min^-1 at 30 ℃ with pH 11.00, the removal rates of COD and TOC reached 96.56% and 89.63% after 90 min, respectively. NaCl and Na2SO4 had inhibitory effects on the degradation system. The mixed salt inhibitory effect is mainly controlled by NaCl contents, which is less than that of NaCl alone because of the solution effect.
作者
李树庭
许振良
黄婕
潘鹤林
徐逸超
胡佳伟
LI Shu-ting;XU Zheng-liang;HUANG Jie;PAN He-lin;XU Yi-chao;HU Jia-wei(School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2019年第5期1232-1239,共8页
Journal of Chemical Engineering of Chinese Universities
基金
中国工程院咨询项目(2017-XZ-08-04-02)
关键词
苯酚
非均相催化剂
工艺优化
化学需氧量
总有机碳
phenol
heterogeneous catalyst
process optimization
chemical oxygen demand(COD)
total organic carbon(TOC)
