de Araújo Thiago Peixoto, Quesada Heloise Beatriz, Dos Santos Débora Federici, da Silva Fonseca Beatriz Carvalho, Barbieri Jéssica Zanette, Bergamasco Rosângela, de Barros Maria Angélica Simões Dornellas
State University of Maringa, Department of Chemical Engineering, Maringa 87020-900, Parana, Brazil.
State University of Maringa, Department of Chemical Engineering, Maringa 87020-900, Parana, Brazil.
Int J Biol Macromol. 2022 Apr 1;203:553-562. doi: 10.1016/j.ijbiomac.2022.01.177. Epub 2022 Feb 2.
The occurrence of acetaminophen in surface water has been reported worldwide, indicating the need of alternative wastewater treatments. Activated hydrochar (AHC) is efficient for pharmaceuticals removal. Powdered AHC presents challenges that hamper its expansion. However, these issues can be overcome by adding polymers, such as alginate, in composite beads. Therefore, the present study aimed to develop and characterize alginate/brewer's spent grain AHC beads, applying them to acetaminophen adsorption in batch and fixed-bed experiments. The adsorbent presented a high surface area (533.42 m g) and Fourier-transform infrared spectroscopy (FTIR) showed that alginate assigned new functional groups to the composite. Batch studies revealed an endothermic behavior and maximum adsorption capacity of 165.94 mg g, with an equilibrium time of 240 min. The fixed-bed maximum adsorption capacity was 127.01 mg g, with a mass transfer zone of 5.89 cm. The importance of alginate for the adsorbent development has been successfully proven.
对乙酰氨基酚在地表水中的出现已在全球范围内有报道，这表明需要采用替代废水处理方法。活性炭化氢（AHC）对去除药物有效。粉末状AHC存在阻碍其推广应用的问题。然而，通过在复合珠中添加聚合物（如藻酸盐）可以克服这些问题。因此，本研究旨在开发和表征藻酸盐/啤酒糟AHC珠，并将其应用于对乙酰氨基酚的分批吸附和固定床实验。该吸附剂具有高比表面积（533.42 m²/g），傅里叶变换红外光谱（FTIR）表明藻酸盐为复合材料赋予了新的官能团。分批研究显示出吸热行为，最大吸附容量为165.94 mg/g，平衡时间为240分钟。固定床最大吸附容量为127.01 mg/g，传质区为5.89 cm。已成功证明藻酸盐对吸附剂开发的重要性。
