纳米Fe_2O_3非均相催化剂制备及在制革废水深度处理中的应用
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摘要
以FeCl_3·6H_2O、尿素、四丁基溴化铵以及乙二醇为原料制备固体粉末,并煅烧固体粉末制备纳米Fe_2O_3催化剂,使用X射线衍射仪和透射电子显微镜进行表征,催化处理皮革废水生化后出水。结果表明:纳米Fe_2O_3非均相催化剂能够高效催化H_2O_2产生,从而有效去除皮革废水生化后出水的COD值和色度。当煅烧温度为550℃、煅烧时间为4h时,纳米Fe_2O_3具有最佳的催化效果。H_2O_2的加入量影响催化剂的处理效果,在废水pH值为5～8,处理时间为0. 5h,H_2O_2加入量为1mL/L时COD去除率接近60%,出水COD值在50mg/L内;色度在30以下,色度去除率大于70%,出水满足国家标准GB 30486-2013的排放要求。
Nano-Fe2O3 catalyst was prepared by calcination method,using Fe Cl3·6H2O,urea,fourbutyl bromide and ethylene glycol as main ingredients. The nano-Fe2O3 was characterized by X-ray diffraction and transmission electron microscopy. Leather secondary effluent was treated by catalyzer. The results show that nano-Fe_2O_3 catalyst can effectively reduce the COD and colority of biochemical leather secondary effluent,when the temperature is 550℃and time is 4h,the processing effect turns to be the best. The treatment result is influenced by the content of H_2O_2 addition. When the p H value of the wastewater is within 5 ～ 8,processing time is 0. 5h and H_2O_2 addition is 1mL/L,the COD removal rate exceeds 60%,the effluent COD value below 50mg/L,colority below 30 and colority removal rate is greater than 70%. The effluent reaches the requirement of standard GB 30486-2013.
Nano-Fe2O3 catalyst was prepared by calcination method,using Fe Cl3·6H2O,urea,fourbutyl bromide and ethylene glycol as main ingredients. The nano-Fe2O3 was characterized by X-ray diffraction and transmission electron microscopy. Leather secondary effluent was treated by catalyzer. The results show that nano-Fe_2O_3 catalyst can effectively reduce the COD and colority of biochemical leather secondary effluent,when the temperature is 550℃and time is 4h,the processing effect turns to be the best. The treatment result is influenced by the content of H_2O_2 addition. When the p H value of the wastewater is within 5 ～ 8,processing time is 0. 5h and H_2O_2 addition is 1mL/L,the COD removal rate exceeds 60%,the effluent COD value below 50mg/L,colority below 30 and colority removal rate is greater than 70%. The effluent reaches the requirement of standard GB 30486-2013.
引文
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[2]唐行鹏,孟宪礼,侯成林,等.某皮革厂皮革废水处理工程案例分析[J].环境工程,2016,34(2):63-68.
[3] Hashem M A,Nur-A-Tomal M S,Bushra S A. Oxidation-coagulation-filtration processes for the reduction of sulfide from the hair burning liming wastewater in tannery[J]. Journal of Cleaner Production,2016,127:339-342.
[4] Wang Y,Li W,Irini A,et al. Removal of organic pollutants in tannery wastewater from wet-blue fur processing by integrated Anoxic/Oxic(A/O)and Fenton:Process optimization[J]. Chemical Engineering Journal,2014,252:22-29.
[5]冯国琳.皮革废水处理的研究进展[J].西部皮革,2016,38(2):17.
[6] Maharaja P,Boopathy R,Karthikeyan S,et al. Advanced oxidation of catechol in reverse osmosis concentrate generated in leather wastewater by Cu-graphite electrode[J]. International Journal of Environmental Science and Technology,2016,13(9):2 143-2 152.
[7] Pavithra S,Madonna A,Swarnalatha S,et al. Degradation of refractory organics in chemical industry wastewater using iron(Ⅱ)Schiff base complex as homogeneous catalyst in Fentonlike oxidation[J]. Desalination and Water Treatment,2016,57(15):6 702-6 711.
[8] Varank G,Yazici Guvenc S,Gurbuz G,et al. Statistical optimization of process parameters for tannery wastewater treatment by electrocoagulation and electro-Fenton techniques[J]. Desalination and Water Treatment,2016:1-14.
[9]赵昌爽,张建昆.芬顿氧化技术在废水处理中的进展研究[J].环境科学与管理,2014,39(5):83-87.
[10]章鹏鹏.芬顿氧化技术在废水处理中的分析与研究[J].资源节约与环保,2015,11:35.
[11]涂丽君,宋平新,宋小会,等.超顺磁性Fe3O4@SiO2复合纳米粒子的制备、表征和性能研究[J].人工晶体学报,2015,44(4):1 025-1 030.