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Ultrafiltration technology with a ceramic membrane for reactive dye removal: optimization of membrane performance
E Alventosa-deLara1, S Barredo-Damas, M I Alcaina-Miranda
1Department of Chemical and Nuclear Engineering, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain. elalde1@txp.upv.es
Journal of Hazardous Materials
|February 14, 2012
Summary
Ultrafiltration ceramic membranes effectively decolorize Reactive Black 5 (RB5) dye solutions. Optimized conditions using response surface methodology (RSM) achieved high dye removal and permeate flux.
Area of Science:
- Environmental Science
- Chemical Engineering
- Materials Science
Background:
- Textile industry wastewater often contains recalcitrant dyes like Reactive Black 5 (RB5).
- Effective decolorization of dye wastewater is crucial for environmental protection.
- Ceramic membranes offer potential for efficient wastewater treatment due to their stability.
Purpose of the Study:
- To investigate the decolorization of Reactive Black 5 (RB5) using an ultrafiltration (UF) ceramic membrane.
- To evaluate the influence of transmembrane pressure (TMP) and cross-flow velocity (CFV) on permeate flux (Jp) and dye rejection (R).
- To optimize UF membrane performance for RB5 decolorization using response surface methodology (RSM).
Main Methods:
- Ultrafiltration (UF) of RB5 solutions at varying concentrations (50 and 500 mg/L).
- Systematic variation of transmembrane pressure (TMP) and cross-flow velocity (CFV).
- Application of response surface methodology (RSM) for performance optimization.
Main Results:
- Permeate flux (Jp) generally increased with TMP and CFV, and decreased with higher dye concentration.
- Maximum steady-state Jp of 266.81 L/(m2h) was achieved at 3 bar, 3m/s, and 50 mg/L.
- Steady-state dye rejection (R) exceeded 79.8% at 50 mg/L and 73.2% at 500 mg/L.
- Optimized conditions (4 bar TMP, 2.53 m/s CFV at 50 mg/L) yielded Jp of 255.86 L/(m2h) and R of 95.2%.
Conclusions:
- UF ceramic membranes are effective for RB5 dye decolorization.
- Operating parameters TMP and CFV significantly impact UF performance.
- RSM successfully optimized the UF process for high dye removal and flux.
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