Polymeric adsorbents for oil removal from water
Hania Albatrni1, Hazim Qiblawey1, Fares Almomani1
1Department of Chemical Engineering, College of Engineering, Qatar University, P. O. Box, 2713, Doha, Qatar.
Chemosphere
|June 15, 2019
Summary
Four synthetic resins effectively remove emulsified oil from produced water, with Optipore L493, Amberlite XAD 7, and Lewatit AF 5 achieving over 98% removal. Amberlite IRA 958 showed minimal effectiveness.
Area of Science:
- Environmental Science
- Chemical Engineering
- Materials Science
Background:
- Produced water often contains emulsified oil, posing environmental challenges.
- Effective removal of emulsified oil is crucial for water treatment and reuse.
Purpose of the Study:
- To investigate the efficacy of four synthetic resins (Optipore L493, Amberlite IRA 958, Amberlite XAD 7, Lewatit AF 5) for removing emulsified oil from produced water.
- To evaluate key experimental parameters influencing oil removal efficiency.
- To determine the adsorption mechanism and kinetics for each resin.
Main Methods:
- Batch adsorption experiments were conducted.
- Adsorbent dosage, contact time, initial oil concentration, and pH were optimized.
- Adsorption isotherm and kinetic models (Langmuir, Freundlich, Toth, Flory Huggins, Dubinin-Radushkevich, pseudo second order) were applied.
- Oil removal rates were quantified.
Main Results:
- Lewatit AF 5, Amberlite XAD 7, and Optipore L493 achieved over 98% oil removal.
- Amberlite IRA 958 demonstrated less than 25% removal efficiency.
- Adsorption mechanisms varied: multilayer adsorption for XAD 7 and L493 (Freundlich and Toth models), and Gaussian energy distribution for AF 5 (Dubinin-Radushkevich model).
- Pseudo second order kinetics best described the removal rate for all resins, with XAD 7 exhibiting the highest kinetics.
Conclusions:
- Synthetic resins, particularly AF 5, XAD 7, and L493, are highly effective for removing emulsified oil from produced water.
- AF 5 demonstrated the highest adsorption capacity, while XAD 7 showed the fastest removal kinetics.
- The study confirms the applicability of these resins for industrial wastewater treatment.
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