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Design and synthesis of organic rectorite-based composite nanofiber membrane with enhanced adsorption performance for bisphenol A

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Abstract

Nowadays, most of mineral-based adsorbents are powder form, which makes them inconvenient to collect and always easy to cause secondary pollution. In this work, an organic rectorite composite nanofiber membrane (SRt-PAN) was designed and prepared by electrospinning technique. The as-received composite nanofiber membranes were characterized by XRD and SEM analysis, proving the homodisperse and existence of SRt in PAN nanofiber membrane. A series of batch experiments for BPA adsorption were carried out to investigate the effect of different adsorption parameters, including initial concentration, pH, and temperature of pollutant solution. The influences of modifier dosage and adsorbent dosage on the adsorption performance were investigated as well. On the basis of the experiment results, the adsorption process could be well described by the pseudo-second-order model and the Langmuir isotherm. In addition, the thermodynamic parameters indicate that this adsorption process is exothermic and spontaneous. Moreover, compared with pure nanofiber membranes and organic rectorite powders, the resultant SRt-PAN adsorbents exhibited higher adsorption capacity, superior reusability, and adsorption stability. It is indicated that the hydrophobicity surface of organic rectorite should be the key factor to not only the intimate interfacial combination between the mineral and PAN, but also the enhancement of BPA adsorption capacity.

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Funding

This work received financial support from the National Natural Science Foundation of China (51774294), the Young Elite Scientists Sponsorship Program by CAST (2017QNRC001), the Yue Qi Young Scholar Project, China university of Mining &Technology (Beijing), the Fundamental Research Funds for the Central Universities (2010YH10 and 2015QH01), Beijing Excellent Talent Training Subsidy Program-Youth Backbone (2017000020124G089), Science and Technology Project of Beijing Municipal Education Commission (KM201910012010), Youth Backbone Teacher Growth Support Plan of Beijing Institute of Fashion Technology (BIFTQG201807), and Talent Introduction Program of Beijing Institute of Fashion Technology (2017A-19).

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Correspondence to Zhiming Sun or Bin Wang.

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Responsible editor: Angeles Blanco

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Sun, Z., Yuan, F., Zhang, X. et al. Design and synthesis of organic rectorite-based composite nanofiber membrane with enhanced adsorption performance for bisphenol A. Environ Sci Pollut Res 26, 28860–28870 (2019). https://doi.org/10.1007/s11356-019-06069-y

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  • DOI: https://doi.org/10.1007/s11356-019-06069-y

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