Synthesis and Characterization of Bamboo Supported Zerovalent Iron for Chromium Adsorption
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Date
2017-06
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Addis Ababa University
Abstract
Chromium is an important industrial metal used in various production processes. Remediation of
Chromium contaminated sites present both technological and economic challenges, as
conventional methods are often too expensive and difficult to operate. Green synthesis provides
advancement over chemical and physical method as it is cost effective, environment friendly,
easily scaled up for large scale synthesis. In this study, bamboo supported Zero-valent iron (Fe0)
nanoparticles were synthesized, characterized, and were tested for adsorption of Cr (VI). Fe0
nanoparticles were synthesized by the reduction of ferric chloride with avocado seed extract
polyphenol and were characterized by UV–Visible spectro- photometer, FTIR (Fourier transform
infrared) spectroscopy and XRD (X-ray diffraction). Batch experiments were performed using
various concentrations of Fe0 nanoparticles for reduction of Cr (VI). The synthesized nZVIbamboo
was subsequently applied to the adsorption of hexavalent chromium from aqueous
solution. The adsorption of chromium was investigated under various experimental conditions
such as pH, initial concentration of chromium and adsorbent dosage. The results showed that the
synthesized nZVI-AB adsorbent was able to perform the maximum adsorption capacity of
18.913 mg/g. and at a concentration of 20 mg/L, pH of 3 and 1 g of nZVI bamboo adsorbent
concentration which resulted in 92.38% and optimum removal percentage. The equilibrium data
was best represented by Langmuir isotherm.
Keywords: Nanozerovalent iron, Green synthesis, polyphenol, FTIR and XRD.
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Keywords
Nanozerovalent iron; Green synthesis; polyphenol; FTIR and XRD