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首页> 外文期刊>Environmental Science & Technology >Modeling Nonequilibrium Adsorption of MIB and Sulfamethoxazole by Powdered Activated Carbon and the Role of Dissolved Organic Matter Competition
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Modeling Nonequilibrium Adsorption of MIB and Sulfamethoxazole by Powdered Activated Carbon and the Role of Dissolved Organic Matter Competition

机译：粉末活性炭对MIB和磺胺甲恶唑的非平衡吸附建模及溶解有机物竞争的作用

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摘要

This study demonstrates that the ideal adsorbed solution theory-equivalent background compound (IAST-EBC) as a stand-alone model can simulate and predict the powdered activated carbon (PAC) adsorption of organic micropollutants found in drinking water sources in the presence of background dissolved organic matter (DOM) under nonequilibrium conditions. The IAST-EBC represents the DOM competitive effect as an equivalent background compound (EBC). When adsorbing 2-methylisoborneol (MIB) with PAC, the EBC initial concentration was a similar percentage, on average 0.51%, of the dissolved organic carbon in eight nonwastewater impacted surface waters. Using this average percentage in the IAST-EBC model yielded good predictions for MIB removal in two nonwastewater impacted waters. The percentage of competitive DOM was significantly greater in wastewater impacted surface waters, and varied markedly in DOM size fractions. Fluorescence parameters exhibited a strong correlation with the percentage of competitive DOM in these waters. Utilizing such correlations in the IAST-EBC successfully modeled MIB and sulfamethoxazole adsorption by three different PACs in the presence of DOM that varied in competitive effect. The influence of simultaneous coagulant addition on PAC adsorption of micropollutants was also investigated. Coagulation caused the DOM competitive effect to increase and decrease with MIB and sulfamethoxazole, respectively.
机译：这项研究表明，理想的吸附溶液理论等效背景化合物（IAST-EBC）作为独立模型可以模拟和预测在存在背景溶解的情况下饮用水源中发现的有机微污染物的粉状活性炭（PAC）吸附非平衡条件下的有机物（DOM）。 IAST-EBC将DOM竞争效果表示为等效的背景化合物（EBC）。当用PAC吸附2-甲基异冰片醇（MIB）时，EBC的初始浓度为八个非废水影响的地表水中溶解的有机碳的平均百分比，平均约为0.51％。在IAST-EBC模型中使用该平均百分比可以很好地预测出在两种不受废水影响的水中的MIB去除情况。在受污水影响的地表水中，竞争性DOM的百分比显着更高，并且DOM大小分数差异显着。荧光参数显示出与这些水中竞争性DOM的百分比密切相关。在IAST-EBC中利用这种相关性，成功模拟了三种不同PAC在竞争效果各不相同的DOM下MIB和磺胺甲恶唑的吸附情况。还研究了同时添加混凝剂对微量污染物PAC吸附的影响。凝血导致DOM竞争作用分别随MIB和磺胺甲恶唑而增加和减少。

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  • 来源
    《Environmental Science & Technology》 |2014年第23期|13735-13742|共8页
  • 作者

    Kyle K. Shimabuku; Hyukjin Cho; Eli B. Townsend; Fernando L . Rosario-Ortiz; R. Scott Summers;

  • 作者单位

    Department of Civil, Environmental, and Architectural Engineering, University of Colorado, 428 UCB, Boulder, Colorado 80309, United States;

    Department of Civil, Environmental, and Architectural Engineering, University of Colorado, 428 UCB, Boulder, Colorado 80309, United States;

    Department of Civil, Environmental, and Architectural Engineering, University of Colorado, 428 UCB, Boulder, Colorado 80309, United States;

    Department of Civil, Environmental, and Architectural Engineering, University of Colorado, 428 UCB, Boulder, Colorado 80309, United States;

    Department of Civil, Environmental, and Architectural Engineering, University of Colorado, 428 UCB, Boulder, Colorado 80309, United States;

  • 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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