Center for Water Quality Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Department of Chemical Engineering, School of Engineering, Islamic Azad University, North Tehran Branch, Tehran, Iran.
J Environ Manage. 2018 Jan 1;205:174-182. doi: 10.1016/j.jenvman.2017.09.074. Epub 2017 Oct 3.
Bisphenol A (BPA) is an emerging contaminant of water resources that disrupts endocrine function. Attempts are continuing to develop cost-effective methods to remove BPA from water environments. The aim of this study was to prepare and characterize polysulfone/graphene oxide nano-composite membranes for removal of BPA from water. Three membranes were synthetized using phase inversion method: polysulfone membrane as PSF and two polysulfone/graphene oxide nano-composite membranes with graphene oxide (GO) weight ratios of 0.4 and 1.0% as PSF/GO 0.4% and PSF/GO 1.0%, respectively. The membrane characteristics including morphology, surface roughness, pore size, zeta potential and presence of functional groups were determined using field emission scanning electron microscopy, atomic force microscopy, streaming potential, and attenuated total reflectance Fourier transform infrared spectroscopy techniques. Inclusion of GO remarkably increased permeate flux of the membranes, so that pure water flux of PSF, PSF/GO 0.4% and PSF/GO 1.0% at operating pressure of 2 bar was determined 226, 449 and 512 L/m h, respectively. The membrane PSF/GO 0.4% with the most negative zeta potential (-10.46 mV) and the highest BPA removal efficiency was determined as the optimal membrane. The optimum conditions of input pressure, operating time, initial concentration of BPA, and pH for BPA removal efficiency by PSF/GO 0.4% were determined using surface response methodology to be 1.02 bar, 10.6 min, 7.5 mg/L, and 5.5, respectively. By optimizing the conditions of operating parameters, experimental BPA removal efficiency by PSF/GO 0.4% reached to as high as 93%.
双酚 A (BPA) 是一种新兴的水资源污染物，会破坏内分泌功能。人们正在继续努力开发经济有效的方法来从水环境中去除 BPA。本研究旨在制备和表征用于从水中去除 BPA 的聚砜/氧化石墨烯纳米复合材料膜。使用相转化法合成了三种膜：聚砜膜（PSF）和两种聚砜/氧化石墨烯纳米复合材料膜，氧化石墨烯（GO）的重量比分别为 0.4%和 1.0%，分别为 PSF/GO 0.4%和 PSF/GO 1.0%。通过场发射扫描电子显微镜、原子力显微镜、流动电势和衰减全反射傅里叶变换红外光谱技术，确定了膜的特性，包括形态、表面粗糙度、孔径、zeta 电位和官能团的存在。GO 的加入显著提高了膜的渗透通量，因此在操作压力为 2 巴时，PSF、PSF/GO 0.4%和 PSF/GO 1.0%的纯水通量分别为 226、449 和 512 L/m h。zeta 电位最负（-10.46 mV）和 BPA 去除效率最高的 PSF/GO 0.4%膜被确定为最佳膜。通过表面响应方法确定了 PSF/GO 0.4%去除 BPA 的最佳条件为输入压力、操作时间、BPA 初始浓度和 pH 值分别为 1.02 巴、10.6 分钟、7.5 毫克/升和 5.5。通过优化操作参数的条件，PSF/GO 0.4%的实验 BPA 去除效率高达 93%。
