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首页> 外文期刊>The Science of the Total Environment >Fixed-bed performance of a waste-derived granular activated carbon for the removal of micropollutants from municipal wastewater
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Fixed-bed performance of a waste-derived granular activated carbon for the removal of micropollutants from municipal wastewater

机译：固定床性能的废物颗粒状活性炭用于去除城市废水中的微量污染物

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This work aimed to assess the fixed-bed adsorptive performance of a primary paper mill sludge-based granular activated carbon (PSA-PA) for the removal of pharmaceuticals, namely carbamazepine (CBZ), sulfamethoxazole (SMX) and paroxetine (PAR), from water. The breakthrough curves corresponding to the adsorption of CBZ at different flow rates and in two different matrices (distilled and municipal wastewater) were firstly determined, which allowed to select the most favorable flow rate for the subsequent experiments. The fixed-bed adsorption of CBZ, SMX and PAR from single and ternary solutions in wastewater showed that the performance of PSA-PA was different for each pharmaceutical. According to the obtained breakthrough curves, the poorest bed adsorption capacity, either from single or ternary solution, was observed for SMX, which may be related with electrostatic repulsion at the pH of the wastewater used (pH similar to 7.3-7.7). Also, the bed adsorption capacity of PSA-PA for SMX, in the ternary solution, was notoriously lower compared to the single solution, while it slightly decreased for CBZ and even increased for PAR. The regeneration studies showed that the CBZ adsorption capacity of the PSA-PA bed decreased about 38 and 71% after the first and the second thermal regeneration stages, respectively. This decline was comparatively larger than the corresponding reduction of the PSA-PA specific surface area (SBET), which decreased only 5 and 25% for the first and second regeneration stages, respectively, and pointed to the lack of viability of more than one regeneration stage. (C) 2019 Elsevier B.V. All rights reserved.
机译：这项工作旨在评估主要造纸厂基于污泥的颗粒状活性炭（PSA-PA）的固定床吸附性能，该活性炭用于从中去除卡马西平（CBZ），磺胺甲恶唑（SMX）和帕罗西汀（PAR）的药物水。首先确定了在不同流速下以及在两种不同基质（蒸馏废水和市政废水）中CBZ吸附的穿透曲线，这为后续实验选择了最有利的流速。废水中单一和三元溶液对CBZ，SMX和PAR的固定床吸附表明，每种药物的PSA-PA性能不同。根据获得的突破曲线，观察到SMX的床吸附能力最差（无论是单一溶液还是三元溶液），这可能与所用废水的pH值（pH值约7.3-7.7）下的静电排斥有关。同样，三元溶液中PSA-PA对SMX的床层吸附能力比单一溶液低得多，而CBZ则略有下降，而PAR则有所增加。再生研究表明，在第一和第二热再生阶段之后，PSA-PA床的CBZ吸附量分别下降了约38％和71％。该下降幅度比相应的PSA-PA比表面积（SBET）的下降幅度更大，后者在第一和第二再生阶段分别仅下降了5％和25％，并指出缺乏多次再生的可行性阶段。 （C）2019 Elsevier B.V.保留所有权利。

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