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Enhancement of Industrial Effluents Quality by Using Nanocomposite Mg/Al LDH Ultrafiltration Membranes
Journal of Inorganic and Organometallic Polymers and Materials ( IF 4 ) Pub Date : 2020-06-02 , DOI: 10.1007/s10904-020-01608-4
Yousra H. Kotp

In this paper, Mg–Al-Acr LDH and Mg–Al-Amps LDH nanocomposites were synthesized via reacting of acrylic acid and 2-acrylamido2-methylpropansulfonic acid with Mg–Al LDH by chelation technique. The nanocomposite LDHs were applied as a hydrophilic fillers for modification of polysulfone (PSf) ultrafiltration membrane. The Mg–Al LDH/PSf, Mg–Al-Acr LDH/PSf and Mg–Al-Amps LDH/PSf membranes were fabricated using induced phase-blending method. The chelated LDHs and UF membranes were characterized using Atomic force microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction and thermogravimetric analyses. In contrast to the neat PSf film, the Mg–Al-Acr LDH/PSf and Mg–Al-Amps LDH/PSf nanocomposite membranes exhibited higher pore size, porosity, hydrophilicity and lower surface roughness. The finger-like structures demonstrated for neat PSf membrane in cross-section SEM images were collapsed in Mg–Al-Acr LDH/PSf and Mg–Al-Amps LDH/PSf nanocomposite membranes. The synthesized PSf films were optimized in the presence of suitable content of hydrophilic LDHs (0.1 wt%). Not only the modified PSf membranes, when compared with the neat membrane, show a higher pure water flux of 300 and 390 l m−2 h for 0.1 wt% Mg–Al-Acr LDH/PSf and Mg–Al-Amps LDH/PSf membranes, respectively, but also the antifouling of the optimal nanocomposite films was enhanced. Moreover, the TOC of the wastewater decreased from 140.8 to 44 and 30.8 mg l−1, correspondingly. Finally, with a higher water permeation and humic acid rejection, those equipped films turned to be more attractive and excellent for effluent features enhancement.



中文翻译:

纳米复合Mg / Al LDH超滤膜提高工业废水质量

本文通过螯合技术使丙烯酸和2-丙烯酰胺基-2-甲基丙磺酸与Mg-Al LDH反应,合成了Mg-Al-Acr LDH和Mg-Al-Amps LDH纳米复合材料。纳米复合材料LDHs被用作亲水性填料,用于改性聚砜(PSf)超滤膜。Mg-Al-LDH / PSf,Mg-Al-Acr LDH / PSf和Mg-Al-Amps LDH / PSf膜采用诱导相混合法制备。使用原子力显微镜,扫描电子显微镜,傅立叶变换红外光谱,X射线衍射和热重分析对螯合的LDH和UF膜进行表征。与纯PSf膜相比,Mg-Al-Acr LDH / PSf和Mg-Al-Amps LDH / PSf纳米复合膜表现出更高的孔径,孔隙率,亲水性和较低的表面粗糙度。在横截面SEM图像中证明纯PSf膜的手指状结构在Mg-Al-Acr LDH / PSf和Mg-Al-Amps LDH / PSf纳米复合膜中塌陷。在适当含量的亲水性LDHs(0.1 wt%)的存在下,对合成的PSf膜进行了优化。与纯膜相比,不仅改性的PSf膜具有更高的纯水通量,分别为300和390 l m 对于0.1 wt%的Mg-Al-Acr LDH / PSf和Mg-Al-Amps LDH / PSf膜分别为-2 h,但最佳纳米复合膜的防污性得到增强。此外,废水的TOC从140.8降至44和30.8 mg l -1。最后,随着更高的水渗透性和腐殖酸排阻,那些配备了薄膜的薄膜变得更具吸引力,并且对污水处理性能的提高非常出色。

更新日期:2020-06-02
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