Effect of nano-TiO2 loading in polysulfone membranes on the removal of pollutant following natural-rubber wastewater treatment
| Autor: | Tutuk Djoko Kusworo, Nita Ariyanti, Dani Puji Utomo |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Fouling Process Chemistry and Technology 02 engineering and technology 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Membrane 020401 chemical engineering chemistry Chemical engineering Wastewater Natural rubber visual_art Ultimate tensile strength visual_art.visual_art_medium Sewage treatment Polysulfone 0204 chemical engineering Turbidity Safety Risk Reliability and Quality Waste Management and Disposal 0105 earth and related environmental sciences Biotechnology |
| Zdroj: | Journal of Water Process Engineering. 35:101190 |
| ISSN: | 2214-7144 |
| Popis: | The natural-rubber processing industry produces large amounts of wastewater. The treatment of this wastewater to produce clean water has potential as an alternative source of process water for natural-rubber production. In this study, we modified a polymeric membrane by nanoparticle blending to enhance its mechanical and separation properties. In this study, we processed natural-rubber wastewater using polysulfone membranes doped with nano-TiO2 particles. SEM characterization shows that the nano-TiO2 loading caused enlargement of the finger-like micro-voids in the membrane sublayer and localization of the TiO2 nanoparticles at the membrane surface. The addition of nano-TiO2 also improved the hydrophilicity by reducing the water contact angle from 61.83 to 41.67° and the mechanical strength of the membrane from 4.1–7.2 MPa. However, at higher nano-TiO2 loadings (>1.5 wt.%), the tensile strength and hydrophilicity both decreased slightly. Due to its greater porosity and pore size, the highest PWF (4.65 L.m−2 h-1) was achieved using a membrane with 2.0-wt.% TiO2. The best pollutant removal efficiency was exhibited by the PSf-TiO2 1.0-wt.% membrane with TDS, COD, NH3, and turbidity rejections of 14.03 %, 87.88 %, 88.79 %, and 99 %, respectively. Due to the improved hydrophilicity of the 0.5-wt.% TiO2 loading membrane, it achieved the lowest reversible fouling resistance Rrf (6.90 × 1015 m–1) for natural-rubber wastewater treatment. The developed membranes have the potential for application in industrial rubber wastewater treatment to produce clean water for reuse. |
| Databáze: | OpenAIRE |
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