Bioremediation of Chromium (III) from Tannery Effluent using Microalgae

Ayaan Ibrahim Naivasal; Mohamed Aadhil Musthak Ahamed; Nooruddin Thajuddin; Davoodbasha Mubarakali

doi:10.34256/famr2426

Ayaan Ibrahim Naivasal School of Life Science, B.S. Abdur Rahman Crescent Institute of Science & Technology, Chennai-600048, Tamil Nadu, India
Mohamed Aadhil Musthak Ahamed School of Life Science, B.S. Abdur Rahman Crescent Institute of Science & Technology, Chennai-600048, Tamil Nadu, India
Nooruddin Thajuddin Crescent Global Outreach Mission (CGOM): R&D, B.S. Abdur Rahman Crescent Institute of Science & Technology, Chennai – 600048, Tamil Nadu, India
Davoodbasha Mubarakali School of Life Science, B.S. Abdur Rahman Crescent Institute of Science & Technology, Chennai-600048, Tamil Nadu, India

Keywords: Algae, Bioremediation, Wastewater, Heavy Metals, Chromium, Biosorption

Abstract

Heavy metal (HM) pollution has slowly but surely crept into the list of direst issues being faced by mankind. It usually results in a myriad of complications for the environment as well as human health. Conventional techniques for the treatment of HM pollution are sometimes not effective under certain conditions. Treatment of HM pollution is currently being explored by utilizing biological activity of plants, algae, fungi, etc. Positive outcomes have been demonstrated, especially by algae. Thus, phycoremediation has arisen as an alternative, green method of solving this issue. Green algae were isolated from Kolavai lake and then cultivated in Erlenmeyer flasks under room conditions. After growth, the cells were harvested by centrifugation and filtration and then dried for 24 hr at high temperatures. Powdered biomass was then added to aqueous solutions containing Chromium at different concentrations with a fixed dosage. Results showed that 30ppm was favored for Cr³⁺ uptake by biosorbent. Next, the effect of pH was studied on adsorption rate. Results indicated that as the pHincreased, the Cr³⁺ uptake was found to have decreased, thus confirming low pH favors Cr³⁺ sorption. AAS results had indicated that biosorbent was effective in Cr³⁺ even at low concentrations and thus provided a possible alternative to conventional techniques.

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