CAJ | 학술논문

利用电子束辐射降解水中的2-氯苯酚(2-CP),4-氯苯酚(4-CP)和2,4-2氯苯酚(2,4-DCP),研究了辐照剂量对初始浓度各为200mg/L的三种氯代苯酚以及浓度各为50mg/L的三种混合物辐射降解、去除有机氯及溶液pH值的影响.用HPLC测定了辐照溶液中2-CP、4-CP和2,4-DCP的含量,测试结果表明,随着辐照剂量的增加氯代苯酚的降解增加,溶液中的氯离子增加,pH值减小.浓度为200mg/L的三种溶液,在同样的辐射剂量率下,其辐射降解速度和氯离子产率的顺序为2,4-DCP＞4-CP＞2-CP;对浓度各为50mg/L氯代苯酚的混合物溶液,2,4-DCP的辐射降解速度最大,4-CP和2-CP的降解速度几乎相同.在辐照剂量为21kGy时,对浓度为200mg/L的三种溶液,其辐射降解率分别为93.0%(2-CP)、98.5%(4-CP)和99.4%(2,4-DCP),氯离子产率为55.4%、71.3%和69.0%,降解率为90%所需剂量(D90)分别为18.0kGy(2-CP)、11.4kGy(4-CP)和6.1kGy(2,4-DCP).浓度各为50mg/L混合体系中的D90值分别为16.1kGy(2-CP)、15.6kGy(4-CP)和12.8kGy(2,4-DCP).
이용전자속복사강해수중적2-록분분(2-CP),4-록분분(4-CP)화2,4-2록분분(2,4-DCP),연구료복조제량대초시농도각위200mg/L적삼충록대분분이급농도각위50mg/L적삼충혼합물복사강해、거제유궤록급용액pH치적영향.용HPLC측정료복조용액중2-CP、4-CP화2,4-DCP적함량,측시결과표명,수착복조제량적증가록대분분적강해증가,용액중적록리자증가,pH치감소.농도위200mg/L적삼충용액,재동양적복사제량솔하,기복사강해속도화록리자산솔적순서위2,4-DCP＞4-CP＞2-CP;대농도각위50mg/L록대분분적혼합물용액,2,4-DCP적복사강해속도최대,4-CP화2-CP적강해속도궤호상동.재복조제량위21kGy시,대농도위200mg/L적삼충용액,기복사강해솔분별위93.0%(2-CP)、98.5%(4-CP)화99.4%(2,4-DCP),록리자산솔위55.4%、71.3%화69.0%,강해솔위90%소수제량(D90)분별위18.0kGy(2-CP)、11.4kGy(4-CP)화6.1kGy(2,4-DCP).농도각위50mg/L혼합체계중적D90치분별위16.1kGy(2-CP)、15.6kGy(4-CP)화12.8kGy(2,4-DCP).
Electron beam was used for degradation of aqueous solutions of 2-chlorophenol (2-CP),4-chlorophenol (4-CP), and 2,4-dichlorophenol (2,4-DCP) in this research. The effect of absorbed dose on substrate degradation, dechlorination and pH of solutions with an initial concentration of 200mg/L each and another solution containing 50mg/L each of the three solutes mixed together were investigated. The results show that increased dose leads to increased degradation of the chlorophenols, increased Cl- yield and decreasing pH value of the solutions.For the individual solutions containing 200mg/L of solutes, the rate of degradation and chloride ion yield was in the order of 2,4-DCP＞4-CP＞2-CP, while for the mixed 50mg/L solution, while 2,4-DCP still has the highest degradation rate, the degradation of 4-CP and 2-CP proceeded almost at the same rate. At a dose of 21kGy, the rate of degradation were 93.0% for 2-CP, 98.5% for 4-CP and 99.4% for 2,4-DCP (200mg/L individual solutions), and the chloride yield was 55.4%, 71.3% and 69.0% for 2-CP, 4-CP and 2,4-DCP respectively. The calculated dose required for 90% degradation of the original solute (D90) are 18.0kGy (2-CP), 11.4kGy (4-CP) and 6.1 kGy (2,4-DCP) for the 200mg/L solutions and 16.1 kGy (2-CP), 15.6kGy (4-CP) and 12.8kGy (2,4-DCP) for the 50mg/L mixed solution.