Journal
JOURNAL OF NANOPARTICLE RESEARCH
Volume 14, Issue 12, Pages -Publisher
SPRINGER
DOI: 10.1007/s11051-012-1272-z
Keywords
Arsenic(III); Graphene nanocomposite; Magnetic separation; Sorption
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Funding
- Council of Scientific and Industrial Research (CSIR), New Delhi (INDIA)
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High specific surface area of graphene (GR) has gained special scientific attention in developing magnetic GR nanocomposite aiming to apply for the remediation of diverse environmental problems like point-of-use water purification and simultaneous separation of contaminants applying low external magnetic field (<1.0 T) from ground water. Fabrication of magnetic manganese-incorporated iron(III) oxide (Mnx2+Fe2-x3+O42-) (IMBO)-GR nanocomposite is reported by exfoliating the GR layers. Latest microscopic, spectroscopic, powder X-ray diffraction, BET surface area, and superconducting quantum interference device characterizations showed that the material is a magnetic nanocomposite with high specific surface area (280 m(2) g(-1)) and pore volume (0.3362 cm(3) g(-1)). Use of this composite for the immobilization of carcinogenic As(III) from water at 300 K and pH similar to 7.0 showed that the nanocomposite has higher binding efficiency with As(III) than the IMBO owing to its high specific surface area. The composite showed almost complete (>99.9 %) As(III) removal (<= 10 mu g L-1) from water. External magnetic field of 0.3 T efficiently separated the water dispersed composite (0.01 g/10 mL) at room temperature (300 K). Thus, this composite is a promising material which can be used effectively as a potent As(III) immobilizer from the contaminated groundwater (>10 mu g L-1) to improve drinking water quality.
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