TiO_(2)/改性煤矸石复合光催化材料的制备及其去除水体中苯酚  

Preparation of TiO_(2)/Coal Gangue Composite Photocatalyst and its Application in Phenol Removal from Water

作　　者：高平强[1] 魏建雄 陈嘉 王贤顺 张岩[1] Gao Pingqiang;Wei Jianxiong;Chen Jia;Wang Xianshun;Zhang Yan(School of Chemistry and Chemical Engineering,Yulin University,Yulin,Shaanxi,China)

机构地区：[1]陕西省榆林学院化学与化工学院,陕西榆林719000

出　　处：《矿产综合利用》2021年第6期73-80,共8页Multipurpose Utilization of Mineral Resources

基　　金：陕西省教育厅重点实验室科研计划项目(19JS072);榆林学院高层次人才科研启动金项目(18GK20);国家大学生创新创业训练计划项目(S202011395022);国家市场监管局科技计划项目(2019MK069)。

摘　　要：以固废物煤矸石(CG)为载体,以Ti(SO_(4))_(2)为钛源,采用水热法制备煤矸石负载型二氧化钛(TiO_(2)/CG)用于含酚废水的处理。利用X射线衍射(XRD)、扫描电镜(SEM)、红外光谱(FT-IR)对产物的组成和微观形貌结构进行表征。以苯酚为目标污染物,考察TiO_(2)/CG/St的投加量、苯酚溶液初始浓度和反应温度对苯酚去除率的影响,研究反应动力学规律。结果表明,TiO_(2)以锐钛矿的形式被成功负载于煤矸石表面后可有效提高其光催化性能。当TiO_(2)/CG用量为2 g/L、反应时间为60 min、反应温度为20℃、苯酚初始浓度为100 mg/L、苯酚初始pH值为5,苯酚去除率达到59%。去除苯酚过程符合伪二级动力学模型。Using solid waste coal gangue(CG)as carrier and Ti(SO_(4))_(2) as titanium source,TiO_(2)/CG was prepared by hydrothermal method to treat phenol containing waste water.X-ray diffraction(XRD),scanning electron microscopy(SEM)and infrared spectroscopy(FT-IR)were used to characterize the composition and microstructure of the products.The effects of the dosage of TiO_(2)/CG,initial concentration of phenol solution and reaction temperature on the removal performance were investigated.The results showed that TiO_(2)as an atase was successfully loaded on the surface of coal gangue.When the dosage of TiO_(2)/CG was 2 g/L,the initial concentration of phenol was 100 mg/L,under the condition of constant temperature of 20℃for 60 min,the removal rate of phenol reached 59%.The removal procession was in accordance with the pseudo second-order kinetic model.

关 键 词：煤矸石 TiO_(2) 苯酚 去除反应 

分 类 号：TD989[矿业工程—选矿] X703[环境科学与工程—环境工程]