N掺杂TiO_2纳米材料对盐酸四环素废水吸附性能研究  

ADSORPTION PERFORMANCE OF N-DOPED TiO_2 NANOMATERIALS FOR TETRACYCLINE HYDROCHLORIDE WASTEWATER

作　　者：邹勇[1] 胡秀虹[1] 曹晖[1] 阮运飞 ZOU Yong ,HU Xiuhong ,CAO Hui ,RUAN Yunfei(Institute of Chemical and Materials Engineering, Kaili University, Kaili 556011, Chin)

机构地区：[1]凯里学院化学与材料工程学院,凯里556011

出　　处：《离子交换与吸附》2018年第1期63-73,共11页Ion Exchange and Adsorption

基　　金：贵州省教育厅重点项目(黔教合KY字[2013]187);贵州省教育厅青年项目(黔教合KY字[2014]311);贵州省科技厅自科项目(黔科合J字[2012]2297号)

摘　　要：以乳液法制备的N-TiO_2纳米材料为吸附剂,对盐酸四环素模拟废水进行了吸附实验。结果表明,在298K、pH=6时,静态吸附容量达27.82mg/g,盐酸四环素的去除率为92.7%;动态吸附量达22.09mg/g,盐酸四环素的去除率为67%;N-TiO_2纳米材料对盐酸四环素的吸附动力学规律符合准一级吸附模型,k=0.01928min-1,Ea=-3.322kJ/mol,吸附为自发的放热过程。其吸附行为与Langmuir和Freundlich方程均吻合。以上实验结果证明,N-TiO_2纳米材料是一种性能优良的吸附剂,能够有效去除模拟废水中的盐酸四环素。The adsorption experiment was carried out on simulated wastewater of tetracycline hydrochloride when N-doped TiO2 nanomaterials prepared by emulsion method were adsorbent. The results showed that the static adsorption capacity was up to 27.82mg/g and the tetracycline hydrochloride removal rate was up to 92.7%, the dynamic adsorption capacity was up to 22.09mg/g and tetracycline hydrochloride removal rate was up to 67% at 298K and pH of 6. The adsorption dynamics of tetracycline hydrochloride on the surface of N-TiO2 could be well described by Pseudo-first-order model. It was a spontaneous exothermic process with the adsorption rate constant （k） and the apparent activation energy （Ea） of tetracycline hydrochloride on N-TiO2 was 0.01928min^-1 and -3.322kJ/mol, respectively. The adsorption behavior was consistent with Langmuir and Freundlich equation. To sum up, it illustrated that N-TiO2 nanomaterials were an excellent adsorbents for removing tetracycline hydrochloride in simulated wastewater well.

关 键 词：N掺杂TIO2 纳米材料 吸附 四环素模拟废水 

分 类 号：O647.3[理学—物理化学]