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首页> 外文期刊>Environmental Science & Technology >Influence of Alkalinity and Salinity on the Sonochemical Degradation of Estrogen Hormones in Aqueous Solution
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Influence of Alkalinity and Salinity on the Sonochemical Degradation of Estrogen Hormones in Aqueous Solution

机译：碱度和盐度对水溶液中雌激素激素声化学降解的影响

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摘要

Ultrasound assisted degradation of estrogen hormones was examined in a batch reactor using a 2 kW (20 kHz) sonication unit. The degradation of estrogens follow a pseudo first order rate kinetics, and the order of degradation is 17α-dihydroequilin > equilin >17α-ethinyl estradiol >17α-estradiol >17β-estradiol > estrone > estriol. Effect of solution alkalinity and salinity on the sonochemical degradation of estrogen hormones is examined. At alkalinity concentration of 10 mM, no adverse effect on the degradation rate constants of estradiols (17α-estradiol, 17β-estradiol, and 17α-ethinyl estradiol) was observed, whereas equilin compounds showed a decrease in their degradation rate constants. Significant inhibitory effects were observed for all the compounds at high alkalinity concentration of 120 mM and which could be due to the scavenging of OH~- radicals in the bulk solution. The presence of salinity (0.17 M) enhanced the estrogen degradation except for the equilin compounds. Simultaneous presence of high alkalinity (120 mM) and salinity (0.17 M) also increased the degradation of estrogen hormones than the case when only alkalinity (120mM) was present, indicating the diffusion of analytes to the cavity interface where most of the degradation occurs under these conditions. A mechanistic approach was used to model the degradation behavior of estrogen hormones under different solution alkalinity and salinity conditions.
机译：在间歇反应器中使用2 kW（20 kHz）超声处理单元检查超声辅助降解雌激素的作用。雌激素的降解遵循拟一级反应动力学，并且降解的顺序为17α-二氢安息香>马equi>17α-乙炔雌二醇>17α-雌二醇>17β-雌二醇>雌酮>雌三醇。研究了溶液碱度和盐度对雌激素激素声化学降解的影响。在碱浓度为10 mM时，未观察到对雌二醇（17α-雌二醇，17β-雌二醇和17α-乙炔基雌二醇）降解速率常数的不利影响，而马匹化合物显示其降解速率常数降低。在120 mM的高碱度浓度下，所有化合物均具有明显的抑制作用，这可能是由于清除了整体溶液中的OH-。盐度（0.17 M）的存在增强了雌激素的降解，除了雌马酚化合物。与仅存在碱度（120mM）的情况相比，同时存在高碱度（120 mM）和盐度（0.17 M）也会增加雌激素的降解，这表明分析物扩散到空腔界面，其中大部分降解发生在这些条件。使用一种机械方法来模拟在不同溶液碱度和盐度条件下雌激素的降解行为。

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  • 来源
    《Environmental Science & Technology》 |2010年第4期|1373-1379|共7页
  • 作者

    ROMINDER P. S. SURI; TONY SARVINDER SINGH; SHASHI ABBURI;

  • 作者单位

    Water & Environmental Technology (WET) Center, Department of Civil and Environmental Engineering, Temple University, Philadelphia Pennsylvania 19122;

    Water & Environmental Technology (WET) Center, Department of Civil and Environmental Engineering, Temple University, Philadelphia Pennsylvania 19122;

    Water & Environmental Technology (WET) Center, Department of Civil and Environmental Engineering, Temple University, Philadelphia Pennsylvania 19122;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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