Development of superhydrophobic/superoleophilic cotton micro dust waste functionalized SiO2 nanocomposite as an efficient adsorbent for oil/water separation

被引：2

作者：

Dhakshana A. ^{[1
,2
]}

Selvakumar R. ^{[3
]}

Vivekanand K. ^{[1
]}

Alagappan M. ^{[2
]}

Chandraraj K. ^{[4
]}

Suriyaraj S.P. ^{[1
]}

机构：

[1] Ardor Biomed India Pvt. Ltd, Pollachi

[2] Department of Electronics and Communication Engineering, PSG College of Technology, Coimbatore

[3] Nanobiotechnology Laboratory, Department of Nanobiotechnology, PSG Institute of Advanced Studies, Coimbatore

[4] Department of Biotechnology, Indian Institute of Technology Madras, Chennai

来源：

Nanotechnology for Environmental Engineering | 2024年 / 9卷 / 02期

关键词：

Adsorption; Cotton micro dust waste; Nanocomposite; SiO[!sub]2[!/sub] nanoparticles; Superhydrophobicity; Superoleophilicity;

D O I：

10.1007/s41204-023-00356-3

中图分类号：

学科分类号：

摘要：

The increasing discharge of oily wastewater from the industries poses a serious threat to human lives and ecological environment. In our present study, we have developed SiO2 nanoparticle-based cotton micro dust waste for oil removal from water. The SiO2 nanoparticles and the cotton waste silicon dioxide nanoparticles-nanocomposite (CW-SiO2-NC) were characterized using UV–visible spectroscopy, particle size analyzer, zeta potential analyzer, transmission electron microscopy (TEM), selected area electron diffraction (SAED), contact angle measurement, X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) and Fourier transform infrared spectroscopy (FTIR). The CW-SiO2-NC showed a superhydrophobicity of 145.8° and superoleophilicity of 3.2°. The amorphous nature of SiO2 and the presence of SiO2 nanoparticles in the nanocomposite were confirmed using XRD technique. The nanocomposite has a high mechanical strength as it withstands a force up to 2114.19 N. The nanocomposite has a good thermal stability of about 255.2 °C, which was obtained through thermogravimetric analysis (TGA). The BET analysis showed the surface area was 17.344 m2/g. Oil adsorption was investigated in dip mode method. The adsorption capacity for the developed nanocomposite (CW-SiO2-NC) was found to be as 3.47 mg/g. Kinetic studies were carried out for the adsorption studies and were found that the nanocomposite follows pseudo-second-order kinetic model. The FTIR analysis confirmed the adsorption of oil molecules onto the developed nanocomposite. Further, field trial was carried out using industrial wastewater sample collected from matured coconut processing industry and tested for oil/fatty content’s removal by dip mode adsorption process using CW-SiO2-NC. The developed composite showed the oil/fatty content’s removal efficiency of 91.5%. This facile approach of designing nanocomposite is efficient in removing oil/fatty contents from industrial effluents. Graphical Abstract: (Figure presented.) © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

引用

页码：267 / 278

页数：11

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