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Study of arsenic(V) adsorption on bone char from aqueous solution
Yun-Nen Chen1, Li-Yuan Chai, Yu-De Shu
1School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi, PR China. cyn70yellow@yahoo.com.cn
Journal of Hazardous Materials
|April 18, 2008
Summary
Bone char effectively removes toxic arsenic(V) ions from contaminated water. This study details how pH, adsorbent dosage, and contact time influence arsenic removal efficiency.
Area of Science:
- Environmental Science
- Water Treatment Technologies
- Materials Science
Background:
- Arsenic contamination in water poses significant health risks.
- Industrial wastewater can leach arsenic into groundwater sources.
- Effective water treatment is crucial for safe drinking water.
Purpose of the Study:
- To investigate the efficacy of bone char for arsenic(V) removal.
- To determine optimal conditions for arsenic adsorption.
- To elucidate the adsorption mechanism.
Main Methods:
- Batch adsorption studies were performed.
- Adsorption was evaluated based on pH, bone char dosage, and contact time.
- Fourier transform infrared spectroscopy was used to analyze bone char.
Main Results:
- Arsenic(V) removal was highly dependent on pH and adsorbent dosage.
- Adsorption followed first-order kinetics, with rapid uptake in the initial 30 minutes.
- The Ca-OH functional group on bone char is key to arsenic removal via co-precipitation and ion exchange.
Conclusions:
- Bone char is a promising adsorbent for removing arsenic(V) from aqueous solutions.
- Optimizing pH and dosage enhances removal efficiency.
- The complex adsorption mechanism involves co-precipitation and ion exchange.
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