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Nanocellulose-organic montmorillonite nanocomposite adsorbent for diuron removal from aqueous solution: optimization
Chengxiao Ma1, Lijuan Yi2, Jie Yang1
1College of Water Conservancy and Architecture Engineering, Shihezi University Shihezi 832000 Xinjiang PR China ljfshz@126.com.
RSC Advances
|May 6, 2022
Summary
A new cellulose nanocrystal/organic montmorillonite nanocomposite (CNC/CTM) efficiently removes the herbicide diuron from water. This adsorbent achieves 82.32% removal, offering a reusable solution for water purification.
Area of Science:
- Environmental Chemistry
- Materials Science
- Nanotechnology
Background:
- Herbicides like diuron are prevalent contaminants in aquatic environments.
- Developing efficient adsorbents for herbicide removal is crucial for water safety.
Purpose of the Study:
- To investigate a cellulose nanocrystal/organic montmorillonite nanocomposite (CNC/CTM) for diuron adsorption.
- To optimize adsorption conditions using Response Surface Methodology (RSM).
- To elucidate the adsorption mechanism and capacity of the CNC/CTM adsorbent.
Main Methods:
- Characterization of the CNC/CTM nanocomposite.
- Optimization of diuron adsorption using RSM.
- Analysis of adsorption isotherms and kinetics.
- Evaluation of adsorbent reusability.
Main Results:
- The CNC/CTM adsorbent demonstrated effective diuron removal.
- Optimal conditions yielded 82.32% efficiency, adsorbing 5.86 mg L-1 diuron with 0.07 g L-1 adsorbent.
- Adsorption followed the Sips model with a maximum capacity of 69.04 mg g-1 at 288 K.
- The process is governed by hydrogen bonding and alkyl chain hydrophobicity, indicating chemical adsorption.
Conclusions:
- CNC/CTM is a highly effective adsorbent for diuron removal from water.
- The adsorbent is reusable for at least five cycles.
- This study provides a foundation for understanding diuron adsorption mechanisms.
