碳质材料催化臭氧氧化去除水中溶解性有机物的研究进展  

Catalytic ozonation based on carbon materials for removing dissolved organic compounds from water:A review

作　　者：钱飞跃[1,2] 王翻翻[1] 刘小朋[1] 李月寒[1] 王建芳[1,2] 

机构地区：[1]苏州科技学院环境科学与工程学院,江苏苏州215009 [2]江苏省环境科学与工程重点实验室,江苏苏州215009

出　　处：《化工进展》2015年第6期1755-1761,共7页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51108291);江苏省建设系统科技项目(2013ZD36);苏州科技学院科研项目(331311203)

摘　　要：碳质材料催化臭氧氧化(CMs/O3)体系具有除污性能强、臭氧利用率高和无金属溶出的特点,但受制于CMs催化性能的易失性,该方法目前仍处于实验室研发阶段。本文系统阐述了CMs/O3体系的反应原理,并认为表面催化氧化与均相羟自由基(HO·)反应是去除水中溶解性有机物的主要途径;详细分析了影响非均相反应机理与体系处理效能的关键因素,并指出在反应过程中,碳表面碱性活性点位的消耗与酸性含氧基团的累积可导致其催化性能的降低,而选择以中孔结构为主的碳质材料,优化溶液p H值和臭氧相对投加量等操作参数,将有利于降低CMs内部的传质阻力,显著提高对目标污染物的去除率。基于新近发表的文献,本文综述了CMs/O3对多种有机污染物和实际废水的处理效能,并认为多壁碳纳米管(MWCNT)的引入与新型固着、负载技术的使用,有望提升CMs/O3在微污染水体深度净化领域的实用化水平。同时,努力将CMs/O3与现有技术相耦合,建立经济、高效的组合工艺也是当前应用研究的重要方向。Catalytic ozonation based on carbon materials labeled as CMs/O3 was well characterized by superior organics removal,high ozone utilization and without metal leaching;however,most of them were still at the stage of laboratory research,since a stable catalytic property of CMs could not be expected after a long running. In this paper,the main reaction mechanisms in CMs/O3 system for removing dissolved organics from water,both surface catalytic oxidation and hydroxyl radicals （HO？）oxidation in bulk solution were discussed and the influences of critical factors in heterogeneous reaction pathways and organics removal efficiency were elaborated. It was pointed out that the consumption of basic active sites and the accumulation of acid oxygen-containing groups on the surface were considered to cause a partial deactivation of CMs in cyclic experiments. In addition,using mesoporous catalyst,optimizing pH and normalized ozone dosage,could help in reducing internal mass transfer resistances,thus enhance target organics removal. This paper reviewed the recent advances of CMs/O3 applied in model organic pollutants removal and industrial wastewater treatment. Multi-walled carbon nanotube （ MWCNT ） and the innovative loading technology could improve CMs/O3 performances in deep purification of micro-polluted water body. Coupling mature treatment methods and CMs/O3 in an efficient and low-cost process was proposed as the important direction of further study.

关 键 词：碳质材料 臭氧氧化 催化作用 有机化合物 表面 羟自由基 

分 类 号：X703[环境科学与工程—环境工程]