精细与专用化学品
精細與專用化學品
정세여전용화학품
FINE AND SPECIALTY CHEMICALS
2011年
9期
14-18
,共5页
复合型光催化剂%凹凸棒土%α-Fe2O3%吸附%光催化
複閤型光催化劑%凹凸棒土%α-Fe2O3%吸附%光催化
복합형광최화제%요철봉토%α-Fe2O3%흡부%광최화
composite photocatalysts%attapulgite%α-Fe2O3%adsorption%photocatalysis
采用酸化法对凹凸棒土进行改性,考察改性条件、投加量、吸附时间以及废水pH值等因素对吸附效果的影响。在盐酸浓度为4mol/L,煅烧温度为200℃时,在最佳吸附条件（改性凹凸棒土投加量0.500g/25mL,废水pH=4,吸附时间1h）下,吸附法处理染料中间体间氯甲苯废水,COD的去除率由改性前的2.2%提高到14.1%。采用浸渍法制备纳米Fe2O3/凹凸棒土复合催化剂并对其表征,XRD分析结果表明,该复合物中光催化剂主要由α-Fe2O3构成;用凹凸棒土吸附-光催化氧化联合法处理间氯甲苯工业废水,在催化剂加入量为1.0g/L,pH=2,紫外光或太阳光照6h条件下,废水COD去除率分别达到59.2%和52.3%。复合催化剂的光催化活性要远大于纯纳米α-Fe2O3的光催化活性。
採用痠化法對凹凸棒土進行改性,攷察改性條件、投加量、吸附時間以及廢水pH值等因素對吸附效果的影響。在鹽痠濃度為4mol/L,煅燒溫度為200℃時,在最佳吸附條件（改性凹凸棒土投加量0.500g/25mL,廢水pH=4,吸附時間1h）下,吸附法處理染料中間體間氯甲苯廢水,COD的去除率由改性前的2.2%提高到14.1%。採用浸漬法製備納米Fe2O3/凹凸棒土複閤催化劑併對其錶徵,XRD分析結果錶明,該複閤物中光催化劑主要由α-Fe2O3構成;用凹凸棒土吸附-光催化氧化聯閤法處理間氯甲苯工業廢水,在催化劑加入量為1.0g/L,pH=2,紫外光或太暘光照6h條件下,廢水COD去除率分彆達到59.2%和52.3%。複閤催化劑的光催化活性要遠大于純納米α-Fe2O3的光催化活性。
채용산화법대요철봉토진행개성,고찰개성조건、투가량、흡부시간이급폐수pH치등인소대흡부효과적영향。재염산농도위4mol/L,단소온도위200℃시,재최가흡부조건（개성요철봉토투가량0.500g/25mL,폐수pH=4,흡부시간1h）하,흡부법처리염료중간체간록갑분폐수,COD적거제솔유개성전적2.2%제고도14.1%。채용침지법제비납미Fe2O3/요철봉토복합최화제병대기표정,XRD분석결과표명,해복합물중광최화제주요유α-Fe2O3구성;용요철봉토흡부-광최화양화연합법처리간록갑분공업폐수,재최화제가입량위1.0g/L,pH=2,자외광혹태양광조6h조건하,폐수COD거제솔분별체도59.2%화52.3%。복합최화제적광최화활성요원대우순납미α-Fe2O3적광최화활성。
Attapulgite was modified by acidification,and main factors such as modification condition,dosage, solution pH value and time of adsorption were studied for adsorption efficiency of attapulgite.Under optimum adsorption conditions（dosage of modified attapulgite was 0.500g/25mL,waste water pH = 4,and time of adsorption was 4h）,with a HCl concentration of 4mol/L and a calcination temperature of 400℃,the removal rate of COD was improved from 2.2%to 14.1%.Nano-iron oxide/attapulgite was synthesized by maceration,and then characterized by X-ray diffraction（XRD）.Experiment results showed that the composite photocatalyst was mainly consisted ofα-Fe2O3.In addition,When treating m-chlorobenzne containing waste water by iron oxide /attapulgite adsorption-photocatalysis method,the removal rate of COD could reach 59.2%and 52.3%when the dosage of catalyst was 2.Og/L,pH = 2,and the time of ultraviolet radiation or sunlight was 6h.The results indicated that the photocatalytic activity of composite photocatalyst was much better than using nanoα-Fe2O alone.
