Adsorption of selected pharmaceuticals and an endocrine disrupting compound by granular activated carbon. 2. Model prediction.
Adsorption of selected pharmaceuticals and an endocrine disrupting compound by granular activated carbon. 2. Model prediction.
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DOI：
10.1021/es7032185
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发表时间：
2009-03
影响因子：
11.4
通讯作者：
Zirui Yu;S. Peldszus;P. Huck
中科院分区：
文献类型：
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作者：
Zirui Yu;S. Peldszus;P. Huck
研究了两种代表性药物活性化合物(PhACs)-萘普生和卡马西平以及一种内分泌干扰化合物(EDC)-硝基苯酚在中试颗粒活性炭（GAC）吸附剂上的吸附作用。酸性萘普生的突破速度最快，壬基酚的去除效果最好，这与污染对化合物去除的影响程度一致。对于这三种化合物，模型预测和实验数据基本一致，这证明了孔隙和表面扩散模型（PSDM）与时变参数方法相结合用于预测环境相关浓度（即ng/L范围）下的去除率的有效性和稳健性。敏感性分析表明，准确测定膜扩散系数对于预测萘普生和卡马西平的突破至关重要，特别是当目标是高去除率时。模型模拟表明，在研究条件下，naproxen的GAC碳利用率（CURs）受到空床接触时间（EBCT）的显著影响。基于模型的比较表明，粉状活性炭（PAC）应用的GAC cus和最小cus最适合达到90%的萘普生去除率，而GAC更适合壬基酚。
The adsorption of two representative pharmaceutically active compounds (PhACs)-naproxen and carbamazepine and one endocrine disrupting compound (EDC)-nonylphenol was studied in pilot-scale granular activated carbon (GAC) adsorbers using post-sedimentation (PS) water from a full-scale drinking water treatment plant. Acidic naproxen broke through fastest while nonylphenol was removed best, which was consistent with the degree to which fouling affected compound removals. Model predictions and experimental data were generally in good agreement for all three compounds, which demonstrated the effectiveness and robustness of the pore and surface diffusion model (PSDM) used in combination with the time-variable parameter approach for predicting removals at environmentally relevant concentrations (i.e., ng/L range). Sensitivity analyses suggested that accurate determination of film diffusion coefficients was critical for predicting breakthrough for naproxen and carbamazepine, in particular when high removals are targeted. Model simulations demonstrated that GAC carbon usage rates (CURs) for naproxen were substantially influenced by the empty bed contact time (EBCT) at the investigated conditions. Model-based comparisons between GAC CURs and minimum CURs for powdered activated carbon (PAC) applications suggested that PAC would be most appropriate for achieving 90% removal of naproxen, whereas GAC would be more suitable for nonylphenol.