Suitability of vetiver (Vetiveria zizanioides) for removal of Cr (III) from tannery effluent using floating bed and rhizofiltration systems

Various physico-chemical methods have been employed in remediating heavy metals from wastewater, but most of them are expensive. While phytoremediation, is one cost-effective and eco-friendly technology, proves to be an alternate amongst which Vetiver, a unique tropical plant, is recognized for its...

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Bibliographic Details
Published in:Journal of applied and natural science 2022, Vol.14 (SI), p.105-110
Main Authors: Karthikeyan, Ganesan, Banu, Kamaludeen Sara Parwin, Maheswari, Muthunalliappan, Karthikeyan, Subburamu, John, Joseph Ezra, Prabhu, Rajarathinam, Poornima, Ramesh
Format: Article
Language:English
Subjects:
Chromium
Effluents
Heavy metals
Metal industry wastewaters
Phytoremediation
Pollutant removal
Pollutants
Sand
Tannery wastes
Trivalent chromium
Tropical plants
Vetiveria zizanioides
Wastewater
Wastewater pollution
Wastewater treatment
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Summary:Various physico-chemical methods have been employed in remediating heavy metals from wastewater, but most of them are expensive. While phytoremediation, is one cost-effective and eco-friendly technology, proves to be an alternate amongst which Vetiver, a unique tropical plant, is recognized for its large biomass and dense root system and has been proven for various remediation studies. The current research was conducted to assess the potential for Vetiver rhizofiltration of chromium. A pilot study was conducted in rhizobox wherein Vetiver was grown using sand as a medium and samples were collected from rhizobox port 1 and rhizobox port 2. Subsequently, the study was upscaled to a floating bed experiment. In both studies, Vetiver were grown under 500 mg L-1 Cr (III) solution and tannery effluent had a chromium concentration of 379 mg L-1 and the results were compared to control. Between the samples collected from port 1 and 2, the removal of chromium in port 1 was recorded to be higher than that of port 2. Moreover, the removal of chromium ions from the tannery effluent was relatively higher than the spiked solution. In both the ports, the highest removal of chromium concentration was recorded in T5 (Sand + Vetiver + Cr (III) @ 500 mg kg-1) with a removal percent of 12.59 and 10.38% in port 1 and 2, respectively. Hence, Vetiver grass has a great potential in removing pollutants like chromium from the wastewater. 
ISSN:0974-9411
2231-5209
DOI:10.31018/jans.v14iSI.3575