化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2015年
6期
1755-1761
,共7页
钱飞跃%王翻翻%刘小朋%李月寒%王建芳
錢飛躍%王翻翻%劉小朋%李月寒%王建芳
전비약%왕번번%류소붕%리월한%왕건방
碳质材料%臭氧氧化%催化作用%有机化合物%表面%羟自由基
碳質材料%臭氧氧化%催化作用%有機化閤物%錶麵%羥自由基
탄질재료%취양양화%최화작용%유궤화합물%표면%간자유기
carbon materials%ozonation%catalysis%organic compounds%surface%hydroxyl radicals
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pH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。
碳質材料催化臭氧氧化(CMs/O3)體繫具有除汙性能彊、臭氧利用率高和無金屬溶齣的特點,但受製于CMs催化性能的易失性,該方法目前仍處于實驗室研髮階段。本文繫統闡述瞭CMs/O3體繫的反應原理,併認為錶麵催化氧化與均相羥自由基(HO?)反應是去除水中溶解性有機物的主要途徑;詳細分析瞭影響非均相反應機理與體繫處理效能的關鍵因素,併指齣在反應過程中,碳錶麵堿性活性點位的消耗與痠性含氧基糰的纍積可導緻其催化性能的降低,而選擇以中孔結構為主的碳質材料,優化溶液pH值和臭氧相對投加量等操作參數,將有利于降低 CMs 內部的傳質阻力,顯著提高對目標汙染物的去除率。基于新近髮錶的文獻,本文綜述瞭 CMs/O3對多種有機汙染物和實際廢水的處理效能,併認為多壁碳納米管(MWCNT)的引入與新型固著、負載技術的使用,有望提升CMs/O3在微汙染水體深度淨化領域的實用化水平。同時,努力將CMs/O3與現有技術相耦閤,建立經濟、高效的組閤工藝也是噹前應用研究的重要方嚮。
탄질재료최화취양양화(CMs/O3)체계구유제오성능강、취양이용솔고화무금속용출적특점,단수제우CMs최화성능적역실성,해방법목전잉처우실험실연발계단。본문계통천술료CMs/O3체계적반응원리,병인위표면최화양화여균상간자유기(HO?)반응시거제수중용해성유궤물적주요도경;상세분석료영향비균상반응궤리여체계처리효능적관건인소,병지출재반응과정중,탄표면감성활성점위적소모여산성함양기단적루적가도치기최화성능적강저,이선택이중공결구위주적탄질재료,우화용액pH치화취양상대투가량등조작삼수,장유리우강저 CMs 내부적전질조력,현저제고대목표오염물적거제솔。기우신근발표적문헌,본문종술료 CMs/O3대다충유궤오염물화실제폐수적처리효능,병인위다벽탄납미관(MWCNT)적인입여신형고착、부재기술적사용,유망제승CMs/O3재미오염수체심도정화영역적실용화수평。동시,노력장CMs/O3여현유기술상우합,건립경제、고효적조합공예야시당전응용연구적중요방향。
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.