有机膨润土负载纳米TiO2的制备及其对盐酸土霉素的吸附能力
Preparation and adsorption capacity of oxytetracycline hydrochloride by nano titania loaded organic bentonite
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摘要: 以钛酸丁酯和有机膨润土为原料,采用溶胶凝胶法制备了有机膨润土负载纳米TiO2吸附剂。通过XRD、BET、SEM等方法对吸附剂进行表征。结果表明,纳米TiO2已负载在有机膨润土上,有机膨润土负载纳米TiO2材料的层间距发生了明显变化,且其比表面积增加。同时对影响吸附盐酸土霉素的因素进行了考察,吸附剂最佳制备条件为煅烧温度300℃,煅烧时间4 h,TiO2含量80%,在pH=6,盐酸土霉素溶液浓度为25 mg·L-1,吸附时间为5 h时,对盐酸土霉素的吸附率可达97.3%。Abstract: An novel nano titania loaded bentonite organic absorbent based on butyl titanate and organic bentonite was prepared by sol-gel method. The properties of absorbent were characterized by various experimental techniques, such as X-ray diffraction (XRD), BET, scanning electron microscope (SEM). The results showed that nano titania was laoded on the organic bentonite, the basal spacing and specific surface area of absorbent were increased significantly. The influences of preparation and adsorption conditions on the adsorption performance were also studied. The results indicated the optimum reaction condition was as follows:pH 6, the calcination temperature 300℃, the calcination time 4 hours, and the nanometer titania content 80%.Under the conditions of pH of 6,adsorption time of 5 h, initial concentration of oxytetracycline hydrochloride of 25 mg·L-1,the adsorption capacity could reach 97.3%.
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Key words:
- organic bentonite /
- nano titania /
- adsorption /
- oxytetracycline hydrochloride
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[1] 赵欢, 李姣, 关卫省. 液相法制备纳米TiO2的工艺及其光催化降解盐酸土霉素的研究[J]. 应用化工, 2012, 41(8):1354-1357 [2] 刘小云, 舒为群. 水中抗生素污染现状及检测技术研究进展[J]. 中国卫生检验杂志, 2005, 15(8):1011-1014 [3] 晁显玉, 曹红翠, 古小超. 抗生素类废水处理方法的研究概述[J]. 山西化工, 2015, 35(3):78-82 [4] 史瑞明, 王峰, 杨玉萍. 抗生素废水处理现状与研究进展[J].山东化工, 2007, 36(11):10-14 [5] LI S Z,LI X Y,WANG D Z. Membrane(RO-UF)fihrationfor antibiotic wastewater treatment and recoveryof ant-ibioticsl[J].Separation and Purification Teehnoogy, 2004, 34(13):109-114 [6] 祁彦洁,刘菲. 地下水中抗生素污染检测分析研究进展[J].岩矿测试, 2014, 33(1):1-11 [7] 刘佳, 隋铭皓, 朱春艳. 水环境中抗生素的污染现状及其去除方法研究进展[J]. 四川环境, 2011, 30(2):111-114 [8] 李霞, 胡勤海, 陈菊芬, 等. 纳米TiO2/硅藻土光催化降解废水中二甲胺[J].环境工程学报, 2013, 7(8):3073-1029 [9] SHI Q, JIANG C Y, WANG Y P, et al. Preparation and characterization of PVA-I complex doped mesoporous TiO2 by hydrothermal method[J]. Applied Surface Science,2013,273:769-755 [10] 杨茜怡, 孙洋洋. Zn/Ti-ATPs的合成及其光催化降解盐酸四环素的研究[J]. 应用化工, 2014, 43(6):1025-1028 [11] 赵雪辉, 蒋彩云, 王玉萍. PVA-I修饰介孔TiO2光催化剂对盐酸四环素的光降解[J].环境工程学报, 2014, 8(10):4060-4066 [12] 杨召营, 李晓静. 纳米材料与技术在水处理中的应用[J]. 化工技术与开发, 2012, 41(1):23-25 [13] 杨盛春, 贺洁, 何丽仙. 有机插层膨润土的制备及吸附性能研究[J]. 化工科技, 2014, 22(4):21-24 [14] 黄丽华, 赵峰, 陈建民, 等. 纳米TiO2光催化降解直接耐晒蓝的研究[J]. 环境化学, 2003, 22(4):359-363 [15] 李静谊, 斯琴高娃, 刘丽娜. TiO2/膨润土光催化降解有机污染物[J]. 物理化学学报, 2007, 23(1):16-20
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