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A new adsorbent for boron removal from aqueous solutions
Joanna Kluczka1, Teofil Korolewicz, Maria Zołotajkin
1Faculty of Chemistry, Department of Chemistry, Inorganic Technology and Fuels, Silesian University of Technology, Gliwice, Poland. joanna.kluczka@polsl.pl
Environmental Technology
|November 7, 2013
Summary
A novel clineroptilolite and zirconium dioxide (ZrO2) adsorbent effectively removes boron from fresh water. This physical and chemical adsorption process is spontaneous and exothermic, achieving 75% removal at optimal conditions.
Area of Science:
- Environmental Chemistry
- Materials Science
- Water Treatment
Background:
- Boron contamination in freshwater poses environmental and health risks.
- Effective adsorbents are needed for boron removal from water.
- Clinoptilolite modified with zirconium dioxide (ZrO2) is a potential solution.
Purpose of the Study:
- To develop and characterize a novel adsorbent for boron removal.
- To investigate the adsorption behavior and mechanisms of boron uptake.
- To optimize adsorption conditions for maximum boron removal.
Main Methods:
- Batch adsorption experiments were conducted.
- Sorption isotherms (Langmuir, Freundlich, D-R) were analyzed.
- Effect of pH, temperature, contact time, and adsorbent dose were studied.
- Thermodynamic parameters were calculated.
Main Results:
- The adsorbent followed Langmuir, Freundlich, and D-R isotherm models.
- Optimal conditions: pH 8, 30 min contact time, decreased temperature, increased adsorbent dose.
- Maximum boron removal reached 75% at optimal conditions.
- Adsorption capacity estimated > 3 mg B/g.
- Adsorption process was spontaneous, exothermic, and involved both physical and chemical interactions.
Conclusions:
- Clinoptilolite modified with amorphous ZrO2 is an effective adsorbent for boron removal.
- The adsorption mechanism involves both physisorption and chemisorption.
- The developed adsorbent shows promise for practical water treatment applications.
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