中国环境科学
中國環境科學
중국배경과학
China Environmental Science
2015年
9期
2670-2676
,共7页
李青松%周生辉%李国新%陈国元%马晓雁%高乃云
李青鬆%週生輝%李國新%陳國元%馬曉雁%高迺雲
리청송%주생휘%리국신%진국원%마효안%고내운
三氯生%超声%氯胺%降解产物
三氯生%超聲%氯胺%降解產物
삼록생%초성%록알%강해산물
triclosan%ultrasound%chloramine%degradation product
采用超声与氯胺联用工艺对水中三氯生(TCS)的去除进行了研究,考察了超声功率、氯胺投加量、TCS初始浓度、pH值和自由基捕获剂等因素对TCS去除的影响,鉴定识别了降解产物并探讨联用工艺降解TCS的机理.结果表明,超声和氯胺联用去除TCS具有协同效应,可以有效地去除TCS.超声波功率为600W,TCS浓度为200μg/L,氯胺浓度为5mg/L时,120min后TCS去除率可达90.8%.联用工艺中增加超声功率可以提高TCS的去除,TCS的去除率随氯胺浓度升高呈现出先升高后降低的趋势,随着初始浓度的升高而下降,碱性环境有利于TCS的去除,pH值为10.7时,TCS的去除可达100%,自由基捕获剂叔丁醇TBA对TCS的去除有抑制作用. GC/MS扫描分析表明2,4-二氯苯酚(2,4-DCP)为TCS的降解产物.
採用超聲與氯胺聯用工藝對水中三氯生(TCS)的去除進行瞭研究,攷察瞭超聲功率、氯胺投加量、TCS初始濃度、pH值和自由基捕穫劑等因素對TCS去除的影響,鑒定識彆瞭降解產物併探討聯用工藝降解TCS的機理.結果錶明,超聲和氯胺聯用去除TCS具有協同效應,可以有效地去除TCS.超聲波功率為600W,TCS濃度為200μg/L,氯胺濃度為5mg/L時,120min後TCS去除率可達90.8%.聯用工藝中增加超聲功率可以提高TCS的去除,TCS的去除率隨氯胺濃度升高呈現齣先升高後降低的趨勢,隨著初始濃度的升高而下降,堿性環境有利于TCS的去除,pH值為10.7時,TCS的去除可達100%,自由基捕穫劑叔丁醇TBA對TCS的去除有抑製作用. GC/MS掃描分析錶明2,4-二氯苯酚(2,4-DCP)為TCS的降解產物.
채용초성여록알련용공예대수중삼록생(TCS)적거제진행료연구,고찰료초성공솔、록알투가량、TCS초시농도、pH치화자유기포획제등인소대TCS거제적영향,감정식별료강해산물병탐토련용공예강해TCS적궤리.결과표명,초성화록알련용거제TCS구유협동효응,가이유효지거제TCS.초성파공솔위600W,TCS농도위200μg/L,록알농도위5mg/L시,120min후TCS거제솔가체90.8%.련용공예중증가초성공솔가이제고TCS적거제,TCS적거제솔수록알농도승고정현출선승고후강저적추세,수착초시농도적승고이하강,감성배경유리우TCS적거제,pH치위10.7시,TCS적거제가체100%,자유기포획제숙정순TBA대TCS적거제유억제작용. GC/MS소묘분석표명2,4-이록분분(2,4-DCP)위TCS적강해산물.
Ultrasound and chloramine combined process was employed in this paper to remove triclosan (TCS) in aqueous solution. The effects of several factors such as ultrasonic power, chloramine dosage, TCS initial concentration, pH and radical scavenger on TCS degradation were studied. Furthermore, the degradation products were identified and the degradation mechanism of TCS by combined process was discussed. The results indicated that the combination of ultrasound and chloramine can remove TCS effectively and possess significant synergetic effect on the degradation. The degradation rate of TCS could reach 90.8% within 120min under the conditions of ultrasonic power 600W, TCS initial concentration of 200μg/L, and chloramine dosage of 5mg/L. TCS degradation efficiency decreased with the raise of initial concentration of TCS, and tended to increase firstly and then decrease with the increase of chloramine concentration. Alkaline environment was conducive to the TCS removal, and the degration efficiency of TCS could reach 100% when pH value was 10.7. The presence of free radical scavenger TBA had an inhibitory effect on TCS degradation. The identification and recognition of degradation products by GC/MS indicated 2,4-dichlorophenol (2,4-DCP) was the main degradation products of TCS during the combined process.