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抗坏血酸对三价铁/过氧化钙体系降解头孢氨苄的影响

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卢建, 黄天寅, 徐劼, 房聪, 陈家斌. 抗坏血酸对三价铁/过氧化钙体系降解头孢氨苄的影响[J]. 环境工程学报, 2018, 12(10): 2758-2767. doi: 10.12030/j.cjee.201803251
引用本文: 卢建, 黄天寅, 徐劼, 房聪, 陈家斌. 抗坏血酸对三价铁/过氧化钙体系降解头孢氨苄的影响[J]. 环境工程学报, 2018, 12(10): 2758-2767. doi: 10.12030/j.cjee.201803251
shu
LU Jian, HUANG Tianyin, XU Jie, FANG Cong, CHEN Jiabin. Effect of ascorbic acid on the cefalexin degradation in Fe3+/calcium peroxide system[J]. Chinese Journal of Environmental Engineering, 2018, 12(10): 2758-2767. doi: 10.12030/j.cjee.201803251
Citation: LU Jian, HUANG Tianyin, XU Jie, FANG Cong, CHEN Jiabin. Effect of ascorbic acid on the cefalexin degradation in Fe3+/calcium peroxide system[J]. Chinese Journal of Environmental Engineering, 2018, 12(10): 2758-2767. doi: 10.12030/j.cjee.201803251
shu

抗坏血酸对三价铁/过氧化钙体系降解头孢氨苄的影响

  • 1.

    苏州科技大学环境科学与工程学院，苏州 215009

  • 基金项目:

    国家自然科学基金资助项目（51509175）

    苏州市民生科技项目（SS201666）

    江苏省研究生实践创新计划(SJCX17-0676)

Effect of ascorbic acid on the cefalexin degradation in Fe3+/calcium peroxide system

  • 1.

    School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China

  • Fund Project:

  • 摘要: 通过添加抗坏血酸（AA）能够缓解铁离子形成沉淀和加速(Fe3+转化为Fe2+，催化CP产生活性氧物质（ROSs），对CFX降解起到促进作用。研究了Fe3+/AA/CP体系降解CFX的Fe3+浓度、AA浓度、CP浓度、初始pH等主要影响因素。结果表明：在Fe3+浓度0.60?mmol·L-1、AA浓度0.15?mmol·L-1、CP浓度0.144?g·L-1、CFX的初始浓度0.15?mmol·L-1和初始pH=3.00的室温条件下，20 min内CFX的降解率可达到100%。随着初始pH升高，CFX的降解率随之降低。反应过程中降解CFX的活性物质为羟基自由基（HO·）和超氧自由基（O2-·），其中HO·对CFX降解起到主导作用。水中阴离子的影响表明，SO42-、Cl-对CFX的降解影响较小；但HCO3-对CFX的降解有明显的抑制作用。在处理成分较复杂的实际养殖废水实验中，发现只有提高药剂量才能达到有效降解实际废水中头孢氨苄的目的。
    Abstract: The addition of ascorbic acid (AA) could alleviate the precipitation of dissolved iron and also accelerate the transformation of Fe3+ to Fe2+, which enhanced the generation of reactive oxygen species (ROSs) and thus promoted the degradation of CFX. In the Fe3+/AA/CP system, effects of various factors were explored, including the Fe3+dosage, contents of AA and CP, and initial pH. The results indicated that 100% degradation occurred for 0.15 mmol·L-1CFX after 20 min treatment by Fe3+/AA/CP system at 0.60 mmol·L-1 Fe3+, 0.15 mmol·L-1 AA, 0.144 g·L-1 CP and pH=3.00. The CFX degradation rate decreased with the increase of initial pH. Both of hydroxyl radicals (HO·) and superoxide radicals (O2-·) were determined to be responsible for CFX degradation, HO· plays a major role in the degradation of CFX. The anions of SO42-, Cl- had a slight impact on CFX degradation, while HCO3-significantly inhibited CFX degradation. When the Fe3+/AA/CP system was used to treat real swine wastewater with complex composition, the results indicated that the dosage increase for the reagents was required for the effective CFX degradation.
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  • 刊出日期:  2018-10-11

抗坏血酸对三价铁/过氧化钙体系降解头孢氨苄的影响

  • 1. 苏州科技大学环境科学与工程学院，苏州 215009
基金项目:

国家自然科学基金资助项目（51509175）

苏州市民生科技项目（SS201666）

江苏省研究生实践创新计划(SJCX17-0676)

摘要: 通过添加抗坏血酸（AA）能够缓解铁离子形成沉淀和加速(Fe3+转化为Fe2+，催化CP产生活性氧物质（ROSs），对CFX降解起到促进作用。研究了Fe3+/AA/CP体系降解CFX的Fe3+浓度、AA浓度、CP浓度、初始pH等主要影响因素。结果表明：在Fe3+浓度0.60?mmol·L-1、AA浓度0.15?mmol·L-1、CP浓度0.144?g·L-1、CFX的初始浓度0.15?mmol·L-1和初始pH=3.00的室温条件下，20 min内CFX的降解率可达到100%。随着初始pH升高，CFX的降解率随之降低。反应过程中降解CFX的活性物质为羟基自由基（HO·）和超氧自由基（O2-·），其中HO·对CFX降解起到主导作用。水中阴离子的影响表明，SO42-、Cl-对CFX的降解影响较小；但HCO3-对CFX的降解有明显的抑制作用。在处理成分较复杂的实际养殖废水实验中，发现只有提高药剂量才能达到有效降解实际废水中头孢氨苄的目的。

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