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Polyamide nanofiltration membranes to remove aniline in aqueous solutions
Environmental Technology
|April 8, 2014
Summary
Nanofiltration effectively removes aniline, a harmful industrial pollutant, from wastewater. Polyamide membranes showed varying aniline rejection rates, with HR98PP being the most effective.
Area of Science:
- Environmental Science
- Chemical Engineering
- Water Treatment Technologies
Background:
- Aniline is a widely used industrial chemical and a persistent environmental pollutant.
- Wastewater containing aniline requires effective treatment before discharge to prevent ecological harm.
Purpose of the Study:
- To evaluate the efficacy of nanofiltration (NF) for removing aniline from aqueous solutions.
- To investigate the impact of operational parameters on aniline removal using NF membranes.
- To compare NF performance with reverse osmosis for aniline rejection.
Main Methods:
- Utilized a flat membrane test module with two polyamide composite membranes (NF97 and NF99HF).
- Analyzed the influence of applied pressure, feed concentration, and pH on aniline removal.
- Compared experimental nanofiltration results with prior reverse osmosis data.
Main Results:
- Nanofiltration demonstrated effectiveness in removing aniline from synthetic wastewater.
- Aniline rejection varied among different membranes and operational conditions.
- The established order for aniline rejection was HR98PP > NF97 > DESAL3B > SEPA-MS05 > NF99HF.
Conclusions:
- Nanofiltration is a viable technology for treating aniline-contaminated water.
- Membrane selection and operational parameters are critical for optimizing aniline removal.
- Comparative analysis provides insights into membrane performance for aniline separation.
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