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中南大学学报(自然科学版)

Journal of Central South University

第45卷    第8期    总第240期    2014年8月

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文章编号:1672-7207(2014)08-2905-08
UV/H2O2工艺降解水中扑热息痛
胡栩豪,高乃云,归谈纯,邓靖

(同济大学 污染控制与资源化研究国家重点实验室,上海,200092)

摘 要: 针对传统工艺难以有效去除水中抗生素的问题,采用UV/H2O2工艺降解水中残留的典型药物扑热息痛(APAP)。紫外光会催化双氧水(H2O2)产生羟基自由基(HO.)降解水中扑热息痛。扑热息痛降解过程符合准一级动力学模型。研究其反应物初始质量浓度、H2O2投加量、反应液pH、光照强度及水中不同阴离子对扑热息痛去除率的影响。研究结果表明:随着反应物初始质量浓度的升高,UV/H2O2工艺降解APAP的反应速率降低,当反应物初始质量浓度从2 mg/L增加至10 mg/L时,降解速率常数由0.108 9 min-1降低到0.037 6 min-1;在一定范围内,双氧水投加量越多,APAP的降解速率越快;光照强度越强,APAP的降解速率越快;在酸性条件下,UV/H2O2工艺降解APAP速率较快;阴离子对UV/H2O2工艺降解APAP的影响不同,阴离子体系反应降解速率常数从大至小依次为NO3-,SO42-,Cl-和CO32-

 

关键词: 扑热息痛;紫外光;双氧水;羟基自由基;动力学

UV/H2O2 oxidation of paracetamol in aqueous solution
HU Xuhao, GAO Naiyun, GUI Tanchun, DENG Jing

State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, China

Abstract:As antibiotics in aqueous solution was hard to be removed by traditional technologies, UV/H2O2 technology was used for residual paracetamol(APAP) degradation. UV photolytic H2O2 activation was used to produce highly reactive radicals(HO.) to decompose paracetamol(APAP) in water. The paracetamol decomposition exhibits a pseudo-?rst-order kinetics pattern. The effect of initial mass concentration of reactant, adding dosage of hydrogen peroxide, pH of reaction solution, UV light intensity as well as different anions on the removal rate of paracetamol was discussed. The results show that, the initial mass concentration of reactant increases from 2 mg/L to 10 mg/L, the degradation rate constant varies from 0.108 9 min-1 to 0.037 6 min-1, the rate constant inreases with the increase in initial amount of H2O2. The rate constant linearly increases in UV irradiation power. In acidic condition, UV-activated hydrogen peroxide oxidation of paracetamol is faster; the anions have different effects on the degradation of APAP by UV/H2O2, the degradation rate constant of four anions affecting paracetamol decomposition from high to low are NO3-, SO42-, Cl- and CO32-.

 

Key words: paracetamol; UV; hydrogen peroxide; .OH; kinetics

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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