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Updated: May 10, 2026
08:01
Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
Published on: June 28, 2019
Arsenic removal using natural biomaterial-based sorbents.
Linda Ansone1, Maris Klavins, Arturs Viksna
1Department of Environmental Science, University of Latvia, Raina Blvd 19, Riga, Latvia. linda_ansone@inbox.lv
Environmental Geochemistry and Health
|June 25, 2013
Summary
Iron-modified peat effectively removes arsenate from water, achieving over 90% removal in 5 hours. This cost-effective biomaterial offers a promising solution for arsenic contamination, though phosphate and humic acid reduce efficiency.
Area of Science:
- Environmental Science
- Materials Science
- Water Treatment
Background:
- Arsenic contamination in water poses a global health and environmental challenge.
- Developing cost-effective and eco-friendly sorbents from natural biomaterials is crucial for arsenic removal.
- Iron oxyhydroxide impregnation offers a promising strategy for enhancing biomaterial sorption capabilities.
Purpose of the Study:
- To evaluate the efficacy of novel biomaterial-based sorbents for arsenate removal from contaminated water.
- To investigate the sorption capacity and kinetics of iron-modified peat and other biomaterials.
- To assess the influence of competing anions and natural organic matter on arsenic sorption.
Main Methods:
- Preparation and characterization of various iron-modified biomaterials, including peat, shingles, straw, cane, and moss.
- Batch experiments were conducted to determine arsenate sorption capacity and kinetics.
- Kinetic studies followed pseudo-second-order mechanism for iron-modified peat.
- Competitive sorption experiments were performed with common anions and humic acid.
Main Results:
- Iron-modified peat exhibited the highest sorption capacity for arsenate compared to other tested materials.
- Arsenate removal efficiency exceeded 90% within 5 hours using iron-modified peat.
- Sorption kinetics followed a pseudo-second-order model, indicating chemisorption.
- Sorption was minimally affected by sulfate, nitrate, chloride, and tartrate, but significantly reduced by phosphate and humic acid.
Conclusions:
- Iron-modified peat is a highly effective and efficient sorbent for arsenate removal from water.
- The developed biomaterial offers a sustainable and cost-effective solution for arsenic remediation.
- Understanding the impact of co-existing substances is vital for optimizing real-world water treatment applications.
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