粉煤灰负载TiO_2基材料的制备及其对煤气化废水的处理研究  

Study on preparation of titanium dioxide supported on fly ash and its treatment research of coal gasification wastewater

作　　者：李健[1,2] 闫龙[1,2] 亢玉红[1,2] 王玉飞[1,2] 马亚军[1,2] 陈鲁园 

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]陕西省低变质煤洁净利用重点实验室,陕西榆林719000 [3]兖州煤业榆林能化有限公司,陕西榆林719000

出　　处：《应用化工》2016年第11期2052-2055,共4页Applied Chemical Industry

基　　金：国家自然科学基金项目(21203163);陕西省教育厅项目(2013JK0686);榆林市科技局项目(Gy13-09;Sf13-09)

摘　　要：利用HCl、NaOH对活化后的粉煤灰进行酸碱浸提,并以改性粉煤灰为载体,采用溶胶-凝胶法制备了粉煤灰负载Cu^(2+)掺杂的TiO_2基复合材料(Cu^(2+)-TiO_2/FCA),然后用其处理煤气化废水,通过测定不同条件下气化废水降解后COD的值,研究了降解温度、投放量、Cu^(2+)掺杂量对催化剂活性的影响,最后利用XRD、SEM等对光催化剂的形貌和晶型结构进行了表征,研究粉煤灰负载TiO_2基材料的光催化可能机理。结果表明,Cu^(2+)掺杂量为10%的Cu^(2+)-TiO_2/FCA复合材料对于200 m L、COD初始浓度为863.5 mg/L的煤气化废水在温度60℃、投放量4 g时,光催化效果才能达到最佳,COD降解率达到90.1%。The actives fly ash was leached by HCl and NaOH ,the Cu2＋doping TiO2 based composites ma-terial （ Cu2＋-TiO2/FCA） was prepared on the leached fly ash by sol-gel process and used to treatment coal gasification wastewater ,then the effect of degradation temperature ,dosage,doping amount of Cu 2＋ion on catalytic activity was studied by measured the COD value of gasification wastewater degradation .More-over ,the crystal phase and morphology of photocatalyst were investigated by XRD and SEM in order to ex -plain the possible mechanism .The results indicated that photocatalytic effect achieved the best when Cu 2＋doping amount of composites material was 10%, the treatment condition was that the temperature 60 ℃and the dosage 4 g for coal gasification wastewater 200 mL and initial COD 863 .5 mg/L,the COD degra-dation rate reached 90 .1%.

关 键 词：粉煤灰 负载TIO2 煤气化废水 化学需氧量( COD) 

分 类 号：TQ03[化学工程]