Simulating Effluent Organic Matter Competition in Micropollutant Adsorption onto Activated Carbon Using a Surrogate Competitor,Environmental Science & Technology

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Simulating Effluent Organic Matter Competition in Micropollutant Adsorption onto Activated Carbon Using a Surrogate Competitor
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-07-09 , DOI: 10.1021/acs.est.8b01503
Stefan Dittmar ₁ , Frederik Zietzschmann ₁ , Maike Mai ₂ , Eckhard Worch ₃ , Martin Jekel ₁ , Aki S. Ruhl _{1,

4}

Affiliation

Adsorption onto activated carbon is a promising option for removing organic micropollutants (OMPs) from wastewater treatment plant (WWTP) effluents. The heterogeneity of activated carbons and adsorption competition between OMPs and adsorbable compounds of the effluent organic matter (EfOM) complicate the prediction of OMP removals. Thus, reliable and simple test systems are desirable. For this study, batch experiments with powdered activated carbon (PAC) were carried out to examine methyl orange (MO) as a selected surrogate competitor to simulate EfOM adsorption competition. MO solutions were spiked with carbamazepine (CBZ) as an indicator substance for well-adsorbing OMPs. On the basis of CBZ adsorption isotherms in WWTP effluents, MO concentrations for batch test solutions with identical adsorption competition toward CBZ were calculated. The calculations were performed according to an empirical model of CBZ adsorption in the presence of MO, since predictions employing the ideal adsorbed solution theory (IAST) proved to be inaccurate. Comparative batch tests with five different PACs were conducted with WWTP effluent and respective MO batch test solutions. Except for one PAC, the achieved CBZ removals were very similar in WWTP effluent and the test solution. Additionally, a universal correlation between MO and CBZ removals was found for four PACs.

中文翻译：

使用替代竞争者模拟活性炭中微污染物吸附的出水有机物竞争

吸附在活性炭上是从废水处理厂（WWTP）废水中去除有机微污染物（OMP）的有前途的选择。活性炭的异质性以及OMP与废水有机物（EfOM）的可吸附化合物之间的吸附竞争使OMP去除的预测变得复杂。因此，需要可靠且简单的测试系统。对于本研究，进行了粉状活性炭（PAC）的批量实验，以检查甲基橙（MO）作为模拟EfOM吸附竞争的替代替代品。MO溶液中掺入了卡马西平（CBZ），作为良好吸收OMP的指示剂。根据污水处理厂废水中CBZ的吸附等温线，计算出对CBZ具有相同吸附竞争性的分批测试溶液的MO浓度。计算是根据MO存在下CBZ吸附的经验模型进行的，因为使用理想吸附溶液理论（IAST）的预测被证明是不准确的。用WWTP废水和相应的MO批处理溶液进行了五种不同PAC的对比批处理测试。除了一种PAC，在污水处理厂废水和测试溶液中实现的CBZ去除非常相似。此外，发现四个PAC的MO和CBZ去除量之间存在普遍相关性。在污水处理厂废水和测试溶液中实现的CBZ去除非常相似。此外，发现四个PAC的MO和CBZ去除量之间存在普遍相关性。在污水处理厂废水和测试溶液中实现的CBZ去除非常相似。此外，发现四个PAC的MO和CBZ去除量之间存在普遍相关性。

更新日期：2018-07-10

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