摘要
该研究中一种钌(Ⅱ)基配合物[Ru(phen)_(3)][PF_(6)]_(2)(phen=1,10-phenanthroline)被成功合成,用^(1)H NMR、FTIR和UV-vis表征其结构,并研究其在可见光下催化降解盐酸四环素(TC·HCl)的性能和影响因素。结果表明,该配合物在可见光下能有效催化TC·HCl的降解,影响TC·HCl降解的主要因素是体系的pH值和溶解氧含量。在20℃、辐照强度50 mW/cm^(2)、[Ru(phen)_(3)][PF_(6)]_(2)和TC·HCl浓度分别为6.4 mg/L和20 mg/L的条件下,pH值由4增加到10,5 h TC·HCl降解率由7.8%增至88.9%。pH值为7.5时,去除体系溶解氧,5 h TC·HCl降解率由61.9%降至10.7%。TC·HCl降解过程复杂,主要涉及的活性种为单线态氧。
A ruthenium(Ⅱ)complex[Ru(phen)_(3)][PF_(6)]_(2)(phen=1,10-phenanthroline)was synthesized.Its structure was characterized by^(1)H NMR,FTIR spectrometer and UV-vis spectrophotometer.Under visible light,the degradation and influence factors of tetracycline hydrochloride(TC·HCl)was investigated using[Ru(phen)_(3)][PF_(6)]_(2)as a catalyst.The results showed that[Ru(phen)_(3)][PF_(6)]_(2)could effectively catalyze the degradation of TC.The main factors that influencing the photodegradation of TC·HCl are the p H value and dissolved oxygen of the solution.Under the conditions of 20℃,50 mW/cm^(2)of irradiation intensity,20 mg/L of TC·HCl and 6.4 mg/L of[Ru(phen)_(3)][PF_(6)]_(2),the degradation rate of TC·HCl in 5 hours increased gradually from 7.8%to 88.9%with the increase of pH value from 4 to 10.After removing dissolved oxygen,at pH 7.5,the photodegradation rate of TC·HCl in 5 hours decreased rapidly from 61.9%to 10.7%.In conclusion,the degradation process of TC·HCl is complex,and the mainly related active species is singlet oxygen.
作者
高梁河
杨建红
Gao Lianghe;Yang Jianhong(School of Environmental&Safety Engineering,Changzhou University,.Changzhou 213164,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2022年第9期83-89,共7页
Environmental Science & Technology
基金
发酵工程教育部重点实验室项目(202009FE04)。
