Abstract
The negative effects of dye-contaminated wastewater on humans and the environment are well known, so the wastewater must be treated carefully before discharge into the environment. To overcome those impacts, the search for environmentally friendly and low-cost materials is essential, especially in developing countries The objective of the present study was to determine the feasibility of using bauxite from Malaysia as a new and efficient ceramic, hollow-fiber membrane for the degradation of reactive dyes in wastewater. A porous, hollow-fiber membrane was fabricated from bauxite (BHFM) using a phase-inversion technique, followed by sintering at various temperatures. The BHFM consisted of two types of voids, having either a finger-like or a sponge-like structure. As the sintering temperature was increased, the porosity of the BHFM decreased from 46.5 to 9.5%. The greatest mechanical strength of 308.1 MPa was achieved when the BHFM was loaded with 55 wt.% of bauxite and sintered at 1450°C. The remaining 45 wt.% consisted of solvent, polymer binder, and dispersant. The BHFM functioned well as a membrane for microfiltration and a support membrane for ultrafiltration. BHFM with loading of 45 wt.%, 50 wt.%, and 55 wt.% successfully eliminated 90%, 94%, and 98% of 10 ppm reactive dye (RB5) when sintered at the highest temperature.
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ACKNOWLEDGMENTS
The authors gratefully acknowledge financial support from the Ministry of Education Malaysia under the Higher Institution Centre of Excellence Scheme (Project Number: R.J090301.7809.4J430) and Universiti Teknologi Malaysia under the Transdisciplinary Research Grant (Project number: Q.J130000.3509.05G75), Malaysia Research University Network (MRUN) Grant (Project number: R.J130000.7809.4L867), and UTM Grant Award (Project number: R.J130000.7709.5M003). The authors thank Aras Kuasa Sdn Bhd for the research sample and the Advanced Research Technology Research Centre (AMTEC), Universiti Teknologi Malaysia for the technical support and services provided.
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Ismail, N.J., Othman, M.H.D., Abu Bakar, S. et al. FABRICATION OF CERAMIC, HOLLOW-FIBER MEMBRANE: THE EFFECT OF BAUXITE CONTENT AND SINTERING TEMPERATURE. Clays Clay Miner. 68, 309–318 (2020). https://doi.org/10.1007/s42860-020-00076-8
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DOI: https://doi.org/10.1007/s42860-020-00076-8