Potential of LiveSpirulina platensison Biosorption of Hexavalent Chromium and Its Conversion to Trivalent Chromium

Abstract

Microalga biomass has been described worldwide according their capacity to realize biosorption of toxic metals. Chromium is one of the most toxic metals that could contaminate superficial and underground water. Considering the importance of Spirulina biomass in production of supplements for humans and for animal feed we assessed the biosorption of hexavalent chromium by living Spirulina platensis and its capacity to convert hexavalent chromium to trivalent chromium, less toxic, through its metabolism during growth. The active biomass was grown in Zarrouk medium diluted to 50% with distilled water, keeping the experiments under controlled conditions of aeration, temperature of 30°C and lighting of 1,800 lux. Hexavalent chromium was added using a potassium dichromate solution in fed-batch mode with the aim of evaluate the effect of several additions contaminant in the kinetic parameters of the culture. Cell growth was affected by the presence of chromium added at the beginning of cultures, and the best growth rates were obtained at lower metal concentrations in the medium. The biomass removed until 65.2% of hexavalent chromium added to the media, being 90.4% converted into trivalent chromium in the media and 9.6% retained in the biomass as trivalent chromium (0.931 mg.g(-1)).

Spirulina-based carbon bio-sorbent for the efficient removal of metoprolol, diclofenac and other micropollutants from wastewater

“…Spirulina sp. and/or its derivatives have been applied mainly in the adsorption of dyes [6,[34][35][36][37][38][39][40][41][42], and metals (e.g., Cr [14][15][16][17][18][19], Co [14], Pb [20][21][22][23][24][25], Zn [22,26,27], Fe [10], U [28], Cd [19,23,29,30], Cu [18,19,[31][32][33], Ni [18,22,23,31], Al [31]). Thus, the evaluation of their adsorptive performance for hazardous organic MPs is scarce in the literature.…”

“…These blue-green filamentous microalgae are used as a nutritional supplement due to its high content of proteins, carbohydrates, lipids, phycobiliproteins, carotenoids, vitamins, and minerals [13]. Spirulina or its derivatives have been applied in the adsorption of metals [10,[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33], dyes [6,[34][35][36][37][38][39][40][41][42], phenol [43], and antibiotics [7]. To the best of the authors' knowledge, the use of spirulina-based carbon materials to remove a wide range of MPs from urban wastewater samples has not been reported in the literature yet.…”

Pengaruh Komposisi Air Limbah Industri Kertas sebagai Media Pertumbuhan dan Fotoperiode Terhadap Kultur Spirulina platensis

“…Mikroalga Spirulina platensis merupakan salah satu alga hijau-biru yang telah banyak diteliti karena kandungan nutrisinya, baik pada bidang industri makanan, kesehatan, maupun akuakultur (Bertolin et al, 2011;Colla et al, 2015). Mikroalga S. platensis tidak hanya memiliki kandungan protein yang tinggi tetapi juga mengandung asam amino, lipid, asam lemak, karbohidrat, vitamin, mineral, dan pigmen (Blinkova, Gorobets and Baturo, 2001;Ono and Cuello, 2004;Bezerra et al, 2012) sehingga dapat dijadikan sebagai suplemen makanan yang komplit (Soni, Sudhakar and Rana, 2017).…”

Cultivation of Spirulina platensis and Nannochloropsis oculata for nutrient removal from municipal wastewater

“…In this study, Spirulina platensis and Nannochloropsis oculate microalgae are used to treat domestic wastewater. Microalgae Spirulina platensis and is one of the green-blue algae that has been widely researched for its nutritional content, both in the food, health and aquaculture industries (Colla et al, 2015). Nannochloropsis oculate is a type of single-celled microalgae that is included in one of the Eustigmatophyceae classes, which has enormous potential for raw material for triglyceride production.…”