Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
Chemosphere. 2022 Sep;303(Pt 3):135171. doi: 10.1016/j.chemosphere.2022.135171. Epub 2022 Jun 1.
sawdust was valorized using acid-assisted hydrothermal carbonization and used in the removal of endocrine disruptor bisphenol A (BPA). The effect of acid addition on the hydrothermal carbonization of sawdust and removal of BPA was studied. Two different hydrochars were prepared using deionized water (HC) and hydrochloric acid solution (HC) as feed water. The prepared hydrochars were characterized using FESEM, EDS, XRD, Raman spectroscopy, FTIR, TGA, and surface area analysis to study the structural and functional changes. Then they were compared in the removal of bisphenol A. Out of the two hydrochars prepared, acid-assisted hydrothermal carbonized hydrochar (HC) showed better removal efficiency. Hence, HC was used to study the influence of different parameters like pH, adsorbent dosage, and initial bisphenol A concentration by one variable at a time approach. Further, the study of interactive effects and optimization of adsorption of bisphenol A onto HC was carried out using RSM-CCD. The isotherm, kinetics, and thermodynamic studies revealed that the adsorption of bisphenol A could be explained by the Freundlich isotherm, pseudo-second-order kinetics fitted well in all the initial BPA concentrations, and the adsorption of bisphenol A onto HC was exothermic and spontaneous.
利用酸辅助水热碳化对木屑进行了增值利用，并将其用于去除内分泌干扰物双酚 A (BPA)。研究了酸添加对木屑水热碳化和 BPA 去除的影响。使用去离子水 (HC) 和盐酸溶液 (HC) 作为进料水制备了两种不同的水热炭。使用 FESEM、EDS、XRD、拉曼光谱、FTIR、TGA 和表面积分析对制备的水热炭进行了表征，以研究结构和功能变化。然后比较了它们在去除双酚 A 方面的性能。在所制备的两种水热炭中，酸辅助水热碳化水热炭 (HC) 表现出更好的去除效率。因此，HC 被用于通过单变量法研究不同参数（如 pH、吸附剂用量和初始双酚 A 浓度）的影响。此外，还使用 RSM-CCD 研究了双酚 A 吸附到 HC 上的相互作用效应和优化。等温线、动力学和热力学研究表明，双酚 A 的吸附可以用 Freundlich 等温线来解释，在所有初始 BPA 浓度下，伪二阶动力学都很好地拟合，双酚 A 吸附到 HC 上是放热和自发的。
