Over the past few years, heavy metals have been proved to be one of the most important contaminants in industrial wastewater. Chromium is one of these heavy metals, which is being utilized in several industries such as textile, finishing and leather industries. Since hexavalent chromium is highly toxic to human health, removal of it from the wastewater is essential for human safety. One of the techniques for removing chromium (VI) is the use of different adsorbents such as polyaniline. In this study, composites of polyaniline (PANi) were synthesized with various amounts of polyvinyl alcohol (PVA). The results showed that PANi/PVA removed around 76% of chromium at a pH of 6.5; the PVA has altered the morphology of the composites and increased the removal efficiency. Additionally, synthesis of 20 mg/L of PVA by PANi composite showed the best removal efficiency, and the optimal stirring time was calculated as 30 minutes. Moreover, the chromium removal efficiency was increased by decreasing the pH, initial chromium concentration and increasing stirring time.
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Research Article|
September 01 2016
Hexavalent chromium removal by using synthesis of polyaniline and polyvinyl alcohol
Majid Riahi Samani;
Majid Riahi Samani
1Department of Civil Engineering, Khomeinishahr Branch, Islamic Azad University, Khominishahr, Isfahan, Iran
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Parisa Ebrahimbabaie;
Parisa Ebrahimbabaie
2Department of Environment and Energy, Islamic Azad University of Tehran Science and Research Branch, Tehran, Iran
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Hamed Vafaei Molamahmood
3Department of Civil Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran
E-mail: hvmunlimited@gmail.com
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Water Sci Technol (2016) 74 (10): 2305–2313.
Article history
Received:
April 24 2016
Accepted:
August 18 2016
Citation
Majid Riahi Samani, Parisa Ebrahimbabaie, Hamed Vafaei Molamahmood; Hexavalent chromium removal by using synthesis of polyaniline and polyvinyl alcohol. Water Sci Technol 18 November 2016; 74 (10): 2305–2313. doi: https://doi.org/10.2166/wst.2016.412
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