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Published on: May 15, 2017
Nanofiltration process of glyphosate simulated wastewater
1College of Environment, Nanjing University of Technology, Nanjing, Jiangsu, China.
Summary
This study explored nanofiltration for glyphosate removal from wastewater. Optimal conditions were identified, showing that membrane performance is sensitive to pH, temperature, pressure, and feed concentration for effective glyphosate separation.
Area of Science:
- Environmental Science
- Chemical Engineering
- Materials Science
Background:
- Glyphosate is a widely used herbicide, and its presence in wastewater poses environmental concerns.
- Effective removal of glyphosate from industrial and agricultural wastewater is crucial for environmental protection.
Purpose of the Study:
- To investigate the nanofiltration performance of a DK membrane for glyphosate removal.
- To analyze the impact of operating parameters and impurities on membrane separation efficiency.
Main Methods:
- Utilized a DK nanofiltration membrane to process simulated glyphosate wastewater.
- Systematically varied transmembrane pressure, operating temperature, feed concentration, and pH.
- Assessed the influence of NaCl and phosphite on glyphosate retention.
Main Results:
- Glyphosate retention and permeate flux increased with transmembrane pressure.
- Higher operating temperatures boosted flux but reduced retention.
- Increased feed concentration decreased both flux and retention.
- pH significantly affected retention, with a minimum at the membrane's isoelectric point.
- NaCl and phosphite slightly reduced glyphosate retention due to shielding effects.
Conclusions:
- Nanofiltration with DK membranes is a viable method for glyphosate removal.
- Optimizing operating parameters like pH and transmembrane pressure is key for efficient separation.
- Understanding the effects of impurities is important for real-world wastewater treatment applications.
