Magnetic graphene oxide as adsorbent for the removal of lead(II) from water samples

• Main Authors: Nodeh, H. R., Wan Ibrahim, W. A., Sanagi, M. M.
• Format: Article
• Language: English
• Published: Penerbit UTM Press 2016
• Subjects: QD Chemistry
• Online Access: http://eprints.utm.my/id/eprint/74376/1/HamidRashidiNodeh2016_MagneticGrapheneOxideasAdsorbent.pdf; http://eprints.utm.my/id/eprint/74376/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-84962509552&doi=10.11113%2fjt.v78.7808&partnerID=40&md5=fa4bb7e14fd95bf4446f11802b2152d7
• Institution: Universiti Teknologi Malaysia

Magnetic Fe3O4 nanoparticles were prepared on graphene oxide (Fe3O4/GO) in situ in a one step process. The obtained Fe3O4/GO was used as an adsorbent for the removal for Pb(II) from environmental water samples prior to flame atomic absorption spectroscopy measurement. The adsorption procedure was optimized as follows: 60 min adsorption time, 50 mL sample volume, solution pH 4.5, and 25 mg adsorbent dosage. Under the optimum conditions, the adsorption efficiency obtained was greater than 75% (C = 50 mg L-1). The adsorption isotherm of Fe3O4@GO magnetic adsorbent was studied for Pb(II) adsorption using two isotherm adsorption models namely Langmuir and Freundlich. The adsorption isotherm data fits well with Langmuir isotherm (R2 = 0.9988) rather than with Freundlich isotherm. The maximum adsorption capacity (qm) obtained was 86.2 mg g-1. The results signified that the prepared Fe3O4/GO nanocomposite has a great adsorptive ability towards the Pb(II) from environmental water samples.