Journal
MEMBRANES
Volume 12, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/membranes12020208
Keywords
bisphenol A; photocatalytic activity; visible light photocatalytic dual layer hollow fiber membrane
Categories
Funding
- JICA Technical Cooperation Project for ASEAN University Network/Southeast Asia Engineering Education Development Network (JICA Project for AUN/SEED-Net) via the Collaborative Education Program [UTM CEP 2102a/R R.J130000.7309.4B651]
- Ministry of Higher Education Malaysia [R.J090301.7809.4J430]
- Universiti Teknologi Malaysia [Q.J130000.2409.08G34, R.J130000.7709.4J483, Q.J130000.3609.03M17]
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In this study, a Cu2O/PVDF dual layer hollow fiber membrane was used to remove BPA. The membrane showed high porosity, hydrophilicity, and high flux, and was able to effectively remove BPA under visible light irradiation.
Bisphenol A (BPA) is amongst the endocrine disrupting compounds (EDCs) that cause illness to humans and in this work was removed using copper (I) oxide (Cu2O) visible light photocatalyst which has a narrow bandgap of 2.2 eV. This was done by embedding Cu2O into polyvinylidene fluoride (PVDF) membranes to generate a Cu2O/PVDF dual layer hollow fiber (DLHF) membrane using a co-extrusion technique. The initial ratio of 0.25 Cu2O/PVDF was used to study variation of the outer dope extrusion flowrate for 3 mL/min, 6 mL/min and 9 mL/min. Subsequently, the best flowrate was used to vary Cu2O/PVDF for 0.25, 0.50 and 0.75 with fixed outer dope extrusion flowrate. Under visible light irradiation, 10 mg/L of BPA was used to assess the membranes performance. The results show that the outer and inner layers of the membrane have finger-like structures, whereas the intermediate section of the membrane has a sponge-like structure. With high porosity up to 63.13%, the membrane is hydrophilic and exhibited high flux up to 13,891 L/m(2)h. The optimum photocatalytic membrane configuration is 0.50 Cu2O/PVDF DLHF membrane with 6 mL/min outer dope flowrate, which was able to remove 75% of 10 ppm BPA under visible light irradiation without copper leaching into the water sample.
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