Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia.
Department of Microbial Biotechnology, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India.
J Colloid Interface Sci. 2017 Dec 15;508:591-602. doi: 10.1016/j.jcis.2017.08.075. Epub 2017 Aug 23.
Bisphenol A (BPA) is highly considered as an emerging contaminants (ECs) due to their endocrine disrupting and reproductive toxicant nature. It has been detected in drinking water sources in many countries. This study deals with the adsorptive removal of BPA using nylon 6,6 nanofibrous membrane (NNM) fabricated by electrospinning technique. Langmuir and Freundlich isotherm models (R=0.99) were obeyed for BPA adsorption, which indicates the monolayer adsorption of BPA and also surface heterogeneity of NNM. The adsorption kinetics of BPA was followed pseudo second order rate (R=0.89-0.99), which suggests the occurrence of rapid adsorption rate through interaction of surface functional groups present in NNM. The maximum adsorption of BPA (91.3mgg) was attained at 30°C. The hydroxyl groups of BPA form hydrogen bonding with carbonyl groups of NNM during the adsorptive removal process. Reusability study confirmed a much better stability of NNM in the recyclic application. Finally, this study suggests that NNM might be an outstanding nano-adsorbent for the emerging contaminants removal, including BPA from drinking water sources.
双酚 A（BPA）因其具有内分泌干扰和生殖毒性而被高度视为新兴污染物（ECs）。它已在许多国家的饮用水源中被检测到。本研究采用静电纺丝技术制备的尼龙 6,6 纳米纤维膜（NNM），对 BPA 进行吸附去除。BPA 的吸附遵循 Langmuir 和 Freundlich 等温线模型（R=0.99），表明 BPA 的单层吸附和 NNM 的表面不均匀性。BPA 的吸附动力学遵循拟二级速率（R=0.89-0.99），表明通过 NNM 表面存在的官能团相互作用，发生了快速吸附速率。在 30°C 时，BPA 的最大吸附量（91.3mgg）达到了最大。在吸附去除过程中，BPA 的羟基与 NNM 的羰基形成氢键。可重复使用研究证实，NNM 在可回收应用中的稳定性要好得多。最后，本研究表明，NNM 可能是一种出色的纳米吸附剂，可用于去除新兴污染物，包括饮用水源中的 BPA。
