Green synthesized conditions impacting on the reactivity of Fe NPs for the degradation of malachite green

Lanlan Huang; Fang Luo; Zuliang Chen; Mallavarapu Megharaj; Ravendra Naidu

doi:10.1016/j.saa.2014.08.116

Green synthesized conditions impacting on the reactivity of Fe NPs for the degradation of malachite green

Spectrochim Acta A Mol Biomol Spectrosc. 2015 Feb 25:137:154-9. doi: 10.1016/j.saa.2014.08.116. Epub 2014 Sep 6.

Authors

Lanlan Huang¹, Fang Luo², Zuliang Chen³, Mallavarapu Megharaj², Ravendra Naidu²

Affiliations

¹ School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian Province, China.
² Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environments, Mawson Lakes, SA 5095, Australia.
³ School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian Province, China; Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environments, Mawson Lakes, SA 5095, Australia. Electronic address: zuliang.chen@unisa.edu.au.

PMID: 25218224
DOI: 10.1016/j.saa.2014.08.116

Abstract

This study investigates green tea extract synthesized conditions impacting on the reactivity of iron nanoparticles (Fe NPs) used for the degradation of malachite green (MG), including the volume ratio of Fe(2+) and tea extract, the solution pH and temperature. Results indicated that the reactivity of Fe NPs increased with higher temperature, but fell with increasing pH and the volume ratio of Fe(2+) and tea extract. Scanning electron microscope (SEM), energy-dispersive spectrometer (EDS), Fourier transform infrared spectroscope (FTIR) and X-ray diffraction (XRD) indicated that Fe NPs were spherical in shape, their diameter was 70-80 nm and they were mainly composed of iron oxide nanoparticles. UV-visible (UV-vis) indicated that reactivity of Fe NPs used in degradation of MG significantly depended on the synthesized conditions of Fe NPs. This was due to their impact on the reactivity and morphology of Fe NPs. Finally, degradation of MG showed that 90.56% of MG was removed using Fe NPs.

Keywords: Contaminant; Fe NPs; Malachite green; Reactivity; Synthesized conditions.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Green Chemistry Technology / methods*
Hydrogen-Ion Concentration
Iron / chemistry*
Metal Nanoparticles / chemistry*
Metal Nanoparticles / ultrastructure
Plant Extracts / chemistry
Rosaniline Dyes / chemistry*
Solutions
Spectrophotometry, Ultraviolet
Spectroscopy, Fourier Transform Infrared
Tea / chemistry
Temperature
X-Ray Diffraction

Substances

Plant Extracts
Rosaniline Dyes
Solutions
Tea
malachite green
Iron