Fahimi Ario, Zanoletti Alessandra, Federici Stefania, Assi Ahmad, Bilo Fabjola, Depero Laura Eleonora, Bontempi Elza
INSTM and Chemistry for Technologies Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze, 38, 25123 Brescia, Italy.
Materials (Basel). 2020 Sep 7;13(18):3964. doi: 10.3390/ma13183964.
This work proposes new eco-materials for the adsorption of diclofenac (DCF). The large consumption of this nonsteroidal anti-inflammatory drug combined with the inefficiency of wastewater treatment plants (WWTPs) leads to its presence in aquatic environments as an emerging pollutant. The adsorption technique is widely used for pharmaceutical removal. Moreover, due to the large effect of commercial adsorbents, in the frame of the Azure Chemistry approach, new sustainable materials are mandatory for removal as emerging pollutants. The work proposes three adsorbents that were obtained from different stabilization methods of fly ash derived from an incinerator plant; the stabilization techniques involved the use of various industrial by-products such as bottom ash, flue gas desulphurization residues, coal fly ash, and silica fume. The best performance, although less than activated carbon, was obtained by COSMOS (COlloidal Silica Medium to Obtain Safe inert: the case of incinerator fly ash), with a removal efficacy of approximately 76% with 15 g/L of material. Several advantages are expected not only from the DCF removal but also from an economic perspective (the newly obtained adsorbents are eco-materials, so they are cheaper in comparison to conventional adsorbents) and in terms of sustainability (no toxic reagents and no heating treatment are involved). This work highlights the adsorption performance of the new eco-materials and their potential use in WWTPs.
这项工作提出了用于吸附双氯芬酸（DCF）的新型生态材料。这种非甾体抗炎药的大量消耗，再加上污水处理厂（WWTPs）处理效率低下，导致其作为一种新兴污染物存在于水生环境中。吸附技术被广泛用于去除药物。此外，由于商业吸附剂效果显著，在Azure Chemistry方法框架内，新型可持续材料对于去除新兴污染物是必不可少的。这项工作提出了三种吸附剂，它们是通过对来自焚烧厂的粉煤灰采用不同的稳定化方法获得的；稳定化技术涉及使用各种工业副产品，如底灰、烟气脱硫残渣、粉煤灰和硅灰。COSMOS（用于获得安全惰性的胶体硅介质：焚烧炉粉煤灰的情况）获得了最佳性能，尽管低于活性炭，在材料用量为15 g/L时去除效率约为76%。预计不仅在去除DCF方面，而且在经济方面（新获得的吸附剂是生态材料，因此与传统吸附剂相比更便宜）以及可持续性方面（不涉及有毒试剂和热处理）都有诸多优势。这项工作突出了新型生态材料的吸附性能及其在污水处理厂中的潜在用途。
