BIOSUV Research Group, Centro de Investigación Tecnolóxico Industrial - MTI, University of Vigo, Campus As Lagoas-Marcosende, 36310, Vigo, Spain.
BIOSUV Research Group, Centro de Investigación Tecnolóxico Industrial - MTI, University of Vigo, Campus As Lagoas-Marcosende, 36310, Vigo, Spain.
Chemosphere. 2020 Jun;248:125995. doi: 10.1016/j.chemosphere.2020.125995. Epub 2020 Jan 27.
In this study, the performance of three commercial available monolithic carbonaceous aerogels (NQ30A, NQ60A and NQ80A) for the removal of different emerging pollutants, detected in water sources, was evaluated. More specifically, the removal of two pharmaceuticals (antipyrine and sulfamethoxazole) and an anti-fungal agent (methyl paraben), widely used in cosmetics, was studied. The NQ60A demonstrated the best adsorption characteristics and effectively adsorbed over 50 mg/g of the antipyrine and around 30 mg/g sulfamethoxazole and methyl paraben. The kinetic study of the adsorption process revealed that pseudo-first order kinetic model described very well the kinetic behaviour of the selected pollutants onto the NQ60A aerogel. After that, the regeneration of the loaded aerogel, with antipyrine alone and in presence of the other two contaminants, was evaluated. The regeneration was accomplished in two ways: (1) by using directly the loaded aerogels as cathode during the electro-Fenton treatment and (2) by its regeneration immersed in the bulk volume of electro-Fenton cell (boron doped diamond as anode and carbon felt as cathode). Both approaches can provide an effective removal of the pollutants inside the aerogel. In addition, the regenerated aerogel proved to maintain its adsorptive properties and can be successfully reused in successive cycles of adsorption-regeneration. On the basis of these promising results, it can be concluded that the proposed strategy based on aerogels adsorption and electro-Fenton regeneration is a suitable alternative for emerging pollutants removal from water streams.
在这项研究中，评估了三种市售的整体碳气凝胶（NQ30A、NQ60A 和 NQ80A）对水源中检测到的不同新兴污染物的去除性能。具体而言，研究了两种广泛用于化妆品的药物（安替比林和磺胺甲恶唑）和一种抗真菌剂（对羟基苯甲酸甲酯）的去除。NQ60A 表现出最佳的吸附特性，可有效吸附超过 50mg/g 的安替比林和约 30mg/g 的磺胺甲恶唑和对羟基苯甲酸甲酯。吸附过程的动力学研究表明，准一级动力学模型很好地描述了所选污染物在 NQ60A 气凝胶上的动力学行为。之后，评估了单独负载有安替比林和气凝胶在存在其他两种污染物时的负载气凝胶的再生情况。再生是通过两种方式实现的：（1）在电芬顿处理过程中直接使用负载气凝胶作为阴极，（2）将其浸入电芬顿池的体积中进行再生（掺硼金刚石作为阳极，碳纤维毡作为阴极）。这两种方法都可以有效地去除气凝胶内的污染物。此外，再生气凝胶证明保持其吸附性能，并可在吸附-再生的连续循环中成功重复使用。基于这些有前景的结果，可以得出结论，基于气凝胶吸附和电芬顿再生的策略是从水流中去除新兴污染物的一种合适替代方法。
