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Published on: May 15, 2017
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Green Chemistry Applications Using Complexing Materials for Water Treatment.
1National Research and Development Institute for Industrial Ecology ECOIND, Street Podu Dambovitei No. 57-73, District 6, 060652 Bucharest, Romania.
Polymers
|June 13, 2025
Summary
Two novel cellulose-based complexing materials, MS-DR 23 and CELL-DR 23, effectively remove heavy metals like Mn2+, Zn2+, Fe3+, and Cr3+ from water. These reusable materials show significant adsorption capacity, offering a sustainable solution for water purification.
Area of Science:
- Materials Science
- Environmental Chemistry
- Water Treatment Technologies
Background:
- Heavy metal contamination in aqueous media poses significant environmental and health risks.
- Development of efficient and sustainable adsorbents is crucial for effective metal ion removal.
- Cellulosic materials offer a biodegradable and abundant platform for adsorbent development.
Purpose of the Study:
- To synthesize and characterize two novel complexing materials, MS-DR 23 and CELL-DR 23, for heavy metal removal.
- To investigate the adsorption performance of these materials for Mn2+, Zn2+, Fe3+, and Cr3+.
- To evaluate the reusability and applicability of the developed adsorbents in real wastewater.
Main Methods:
- Modification of synthetic cellulose powder (CELL) and maize stalk (MS) with direct red 23 (DR 23) to create MS-DR 23 and CELL-DR 23.
- Optimization of complexing parameters including interaction time, pH, and DR 23 concentration.
- Batch adsorption experiments to assess metal ion removal efficiency, followed by atomic adsorption spectrometry (AAS) analysis.
- Reusability tests and application in tannery wastewater treatment.
Main Results:
- Equilibrium time for DR 23 adsorption was 75 minutes, with optimal adsorption at pH 2.
- Maize stalk-derived material (MS) exhibited higher adsorption capacity (56.8 mg/g) than synthetic cellulose (CELL) (42 mg/g).
- High adsorption of Mn2+, Zn2+, Fe3+, and Cr3+ (Mx+) was achieved at 4 mg/L.
- The developed complexing materials demonstrated good reusability and effectiveness in removing Mx+ from tannery wastewater.
Conclusions:
- MS-DR 23 and CELL-DR 23 are effective complexing materials for removing multiple heavy metal ions from aqueous solutions.
- The adsorbents exhibit favorable adsorption capacities and regeneration potential, indicating their suitability for water purification.
- The study highlights the potential of utilizing modified cellulosic biomass for sustainable heavy metal remediation.
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