CAJ | 학술논문

采用超声波和零价铁联用埘氯代有机物3-氯苯酚(CP)、2,4-二氯苯酚(DCP)和2,4,6-三氯苯酚(TCP)模拟废水进行了脱氯处理研究.以单因素法,考察了铁粉初始投加量、溶液的初始浓度、超声波功率和溶液的pH值等因素对氯代酚降解的影响,并探讨了降解反应动力学.结果表明,超声波和零价铁联用对氯酚具有显著的降解效果,当水样初始浓度为25 mg/L,溶液pH呈弱酸性,超声波功率为200 W时,氯代酚的脱氯效率达到最大值.降解反应符合准一级反应,CP、DCP和TCP的反应速率常数分别0.0613 h~(-1)、0.374 h~(-1)和0.197 h~(-1).
채용초성파화령개철련용시록대유궤물3-록분분(CP)、2,4-이록분분(DCP)화2,4,6-삼록분분(TCP)모의폐수진행료탈록처리연구.이단인소법,고찰료철분초시투가량、용액적초시농도、초성파공솔화용액적pH치등인소대록대분강해적영향,병탐토료강해반응동역학.결과표명,초성파화령개철련용대록분구유현저적강해효과,당수양초시농도위25 mg/L,용액pH정약산성,초성파공솔위200 W시,록대분적탈록효솔체도최대치.강해반응부합준일급반응,CP、DCP화TCP적반응속솔상수분별0.0613 h~(-1)、0.374 h~(-1)화0.197 h~(-1).
In this paper, the dechlorination of 3-chlorophenol (CP) , 2, 4-dichlorophenol (DCP) and 2, 4, 6-trichlorophenol (TCP) by ultrasound (US) and zero valent iron (Fe~0 ) was investigated. The influences of iron addition, power of ultrasound, initial concentration of phenols and pH values of solution on dechlorination efficiency were tested and the kinetics of dechlorination was discussed. It was shown that the dechlorination by US/Fe~0 was significant in general. When the initial concentration of phenols was 25 mg/L, the pH values of solution was weak acid, and the power of ultrasound was 200 W, the efficiency of dechlorination was up to the biggest value. The dechlorination reaction was a pseudo-first-order reaction and the rate constants were 0. 0613 h~(-1) , 0. 374 h~(-1) and 0. 197 h~(-1) for CP, DCP and TCP, respectively.