Clean production of carbon nanomaterials to remove arsenic from drinking water
Novel carbon nanomaterials (CNM) were synthesized through a chemical vapour deposition (CVD) process to adsorb arsenic (As) from water. Iron (Fe) and Nickel (Ni) catalysts were used to produce two different types of CNM, namely carbon nanotubes (CNT) and carbon nanofibres (CNF). Powdered activated...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Ontario International Development Agency
2010
|
| Subjects: | |
| Online Access: | http://irep.iium.edu.my/6404/ http://irep.iium.edu.my/6404/ http://irep.iium.edu.my/6404/1/Clean_production_of_carbon.pdf |
| Summary: | Novel carbon nanomaterials (CNM) were synthesized through a chemical vapour deposition (CVD) process to adsorb arsenic (As) from water. Iron (Fe) and Nickel (Ni) catalysts were used to produce two different types of CNM, namely carbon
nanotubes (CNT) and carbon nanofibres (CNF). Powdered activated carbon (PAC) was used as a substrate, which played the key role for a less hazardous and clean production of CNM. Various concentrations of As (0.5, 5.0 and 10.0 mg/L) were used to prepare synthetically polluted drinking water, which was used for batch mode adsorption
experiments in shake flasks. Adsorption capacities for
CNF at respective concentrations were 1.46, 13.78, 27.97 mg/g and 1.86, 18.44 and 19.68 mg/g for CNT. Results showed that the CNT was suitable for low concentration of arsenic while CNF was good for high concentration. Two isotherms were studied for arsenic removal. It was observed that the CNT fitted better for Langmuir model with the correlation
coefficient of 0.967, while Freundlich worked better
for the CNF exhibiting correlation coefficient of 0.999 |
|---|