非均相Fenton催化剂MIL-101(Fe)@Al_(2)O_(3)的制备及处理吡蚜酮废盐研究  

Preparation of heterogeneous Fenton catalyst MIL-101(Fe)@Al_(2)O_(3) and application in treatment of waste salts from pymetrozine production

作　　者：孔雪鹏 刘媛 余翰名 张玥 张有贤[1] KONG Xue-peng;LIU Yuan;YU Han-ming;ZHANG Yue;ZHANG You-xian(College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学资源环境学院,甘肃兰州730000

出　　处：《现代化工》2021年第11期148-153,共6页Modern Chemical Industry

基　　金：中央高校基本科研业务费专项资金资助项目(lzujbky-2017-it103)。

摘　　要：利用溶胶-凝胶法制备γ-Al_(2)O_(3)、溶剂热法制备MIL-101(Fe)以及2种材料不同掺杂比的复合材料;研究了合成材料对吡蚜酮废盐溶液中COD的去除效果;并对材料晶体结构、表面形貌及表面元素价态进行分析。结果表明,05MIL-101(Fe)@Al_(2)O_(3)材料成功地将MIL-101(Fe)通过γ-Al_(2)O_(3)纳米棒的架桥、链接方式均匀负载到介孔氧化铝上,从而拥有大量反应活性位点。吡蚜酮废盐降解实验表明,05MIL-101(Fe)@Al_(2)O_(3)投加质量浓度为2.0 mg/L、双氧水浓度为120 mmol/L、初始pH为2.93时,20℃下振荡反应5 h,COD值去除率达到50.69%。高盐溶液体系使非均相类芬顿反应速率变慢、反应时间延长、双氧水使用量增加,但对于成分单一、有机物含量较少的废盐仍具有广阔的应用前景。γ-Al_(2)O_(3)is prepared via sol-gel method,and MIL-101(Fe)is prepared via solvothermal method.Then the composites with different doping ratios ofγ-Al_(2)O_(3)and MIL-101(Fe)are prepared by solvothermal method.The removal effect of COD in waste salts solution from pymetrozine production by the composites is studied,and the crystal structure,surface morphology and surface element valence of the composites are analyzed.It is shown that within 05MIL-101(Fe)@Al_(2)O_(3)materials,MIL-101(Fe)has been uniformly loaded onto mesoporous alumina through the bridging and linking mode ofγ-Al_(2)O_(3)nanorods,which makes the materials have a large number of reactive sites.The degradation experiment of pymetrozine-related waste salts shows that COD removal rate reaches 50.69%when the dosage of 05MIL-101(Fe)@Al_(2)O_(3)is 2.0 mg·L-1,the dosage of hydrogen peroxide is 120 mmol·L^(-1),the initial pH is 2.93,and the reaction lasts for 5 h at 20℃.A high salinity solution system can cause the heterogeneous Fenton-like reaction to slow down,prolongs the reaction time,and increases the consumption of hydrogen peroxide.However,it still has a broad application prospect for waste salts with single component and less organic matters.

关 键 词：吡蚜酮废盐 介孔氧化铝 金属有机骨架 高盐溶液 

分 类 号：X786[环境科学与工程—环境工程]