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β-受体阻断剂在粘土上的吸附行为

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许佳瑶, 孙红文, 汪磊. β-受体阻断剂在粘土上的吸附行为[J]. 环境化学, 2013, 32(11): 2109-2114. doi: 10.7524/j.issn.0254-6108.2013.11.013
引用本文: 许佳瑶, 孙红文, 汪磊. β-受体阻断剂在粘土上的吸附行为[J]. 环境化学, 2013, 32(11): 2109-2114. doi: 10.7524/j.issn.0254-6108.2013.11.013
shu
XU Jiayao, SUN Hongwen, WANG Lei. Sorption of β-blockers on clay[J]. Environmental Chemistry, 2013, 32(11): 2109-2114. doi: 10.7524/j.issn.0254-6108.2013.11.013
Citation: XU Jiayao, SUN Hongwen, WANG Lei. Sorption of β-blockers on clay[J]. Environmental Chemistry, 2013, 32(11): 2109-2114. doi: 10.7524/j.issn.0254-6108.2013.11.013
shu

β-受体阻断剂在粘土上的吸附行为

  • 1.

    南开大学环境科学与工程学院, 环境污染过程与基准教育部重点实验室, 天津, 300071

  • 基金项目:

    国家自然科学基金项目(41073087)资助。

Sorption of β-blockers on clay

  • 1.

    MOE Key Laboratory on Environmental Pollution Processes and Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China

  • Fund Project:

  • 摘要: 主要研究了盐度、pH、溶解性有机质(DOM)对典型β-受体阻断剂(美托洛尔与普萘洛尔)在黏土上吸附行为的影响.结果表明，黏土对上述两种β-受体阻断剂具有较强的吸附能力，吸附系数分别为34.914 L·kg-1(美托洛尔)和21.773 L·kg-1(普萘洛尔).盐度增大抑制β-受体阻断剂的吸附，两价钙离子的作用大于一价钠离子.pH为碱性，β-受体阻断剂以中性形式存在，吸附较弱;pH过低导致黏土表面带负电荷电位降低，也不利于吸附.DOM的加入促进β-受体阻断剂的吸附，但促进作用随DOM浓度提高而减弱，甚至出现吸附抑制.
    Abstract: β-Blockers are extensively used in the treatment of high blood pressure (hypertension) worldwide, and they are also used as sedative drugs for livestock transportation before slaughtering. Recent studies indicate that long-term exposure to β-Blocker is harmful to aquatic organisms, and hence research about the fate of β-Blocker should be strengthened. β-Blockers are weak bases that can ionize, leading to some biological and geochemistry characteristics that are different from hydrophobic organic pollutants. In the present paper, the influences of salinity, pH, and dissolved organic matter on the adsorption behavior of two β-Blockers (metoprolol and propranolol) were systematically studied. Results showed that the two blockers strongly adsorbed on the clay, with absorption coefficients of 34.914 L·kg-1 (metoprolol) and 21.773 L·kg-1(propranolol), respectively. Salinity inhibited the adsorption of β-Blockers, and the divalent Ca2+ showed greater inhibition than the monovalent Na+. The adsorption of β-Blockers was weak under alkaline condition where they were neutral molecules. The adsorption was also inhibited at low pH where the surface of clay exhibited weakly negative charge. Addition of dissolved organic matter (DOM) facilitated the adsorption of β-Blockers. However, the enhancement decreased with the concentration of DOM, and inhibition occurred at high DOM concentrations.
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  • 收稿日期:  2012-12-12
许佳瑶, 孙红文, 汪磊. β-受体阻断剂在粘土上的吸附行为[J]. 环境化学, 2013, 32(11): 2109-2114. doi: 10.7524/j.issn.0254-6108.2013.11.013
引用本文: 许佳瑶, 孙红文, 汪磊. β-受体阻断剂在粘土上的吸附行为[J]. 环境化学, 2013, 32(11): 2109-2114. doi: 10.7524/j.issn.0254-6108.2013.11.013
shu
XU Jiayao, SUN Hongwen, WANG Lei. Sorption of β-blockers on clay[J]. Environmental Chemistry, 2013, 32(11): 2109-2114. doi: 10.7524/j.issn.0254-6108.2013.11.013
Citation: XU Jiayao, SUN Hongwen, WANG Lei. Sorption of β-blockers on clay[J]. Environmental Chemistry, 2013, 32(11): 2109-2114. doi: 10.7524/j.issn.0254-6108.2013.11.013
shu

β-受体阻断剂在粘土上的吸附行为

  • 1. 南开大学环境科学与工程学院, 环境污染过程与基准教育部重点实验室, 天津, 300071
  • 收稿日期:  2012-12-12
基金项目:

国家自然科学基金项目(41073087)资助。

摘要: 主要研究了盐度、pH、溶解性有机质(DOM)对典型β-受体阻断剂(美托洛尔与普萘洛尔)在黏土上吸附行为的影响.结果表明，黏土对上述两种β-受体阻断剂具有较强的吸附能力，吸附系数分别为34.914 L·kg-1(美托洛尔)和21.773 L·kg-1(普萘洛尔).盐度增大抑制β-受体阻断剂的吸附，两价钙离子的作用大于一价钠离子.pH为碱性，β-受体阻断剂以中性形式存在，吸附较弱;pH过低导致黏土表面带负电荷电位降低，也不利于吸附.DOM的加入促进β-受体阻断剂的吸附，但促进作用随DOM浓度提高而减弱，甚至出现吸附抑制.

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