Microalgae for biofuel production and removal of heavy metals: a review

Pavithra, K. Grace; Kumar, Pradeep; Jaikumar, V.; Vardhan, Kilaru Harsha; SundarRajan, PanneerSelvam

doi:10.1007/s10311-020-01046-1

Cited by 86 publications

(24 citation statements)

References 156 publications

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“…The treatment of industrial wastewaters to remove organic pollutants is an important aspect of environmental technology. Treatments of dye wastewater from the industries are to be done in order to control the negative impact to our environment due to polluted water . This study was designed to investigate the oxidation (decolorization/degradation) of SSY dye (which is largely used as a colorant in common foods and drugs industries) in aqueous solutions.…”

Section: Resultsmentioning

confidence: 99%

Eco‐Friendly Approach to Synthesize Selenium Nanoparticles: Photocatalytic Degradation of Sunset Yellow Azo Dye and Anticancer Activity

2019

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This report has two principal goals. First, to synthesis Se nanoparticles (Se-NPLs) via a green approach. Secondly, to explore the photocatalytic activity of Se-NPLs towards the decolorization of sunset yellow (SSY) azo-dye and to test its activity against some types of human cancers. Green synthesis of Se-NPLs from the leaf extracts of Drumstick was developed. Bio-synthesized Se-NPLs were characterized using FTIR, UV-vis, photoluminescence (PL), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy dispersive analysis Xray (EDAX) and transmission electron microscopy (TEM) analyses. The UV-vis absorption maximum between 200 and 400 nm was due to the formation of SPR of Se-NPLs. FTIR revealed the Se-NPLs were synthesized, capped and stabilized with biomolecules present in the plant extracts. Se-NPLs exhibited an excitation peak at 399 nm and produced an emission peak at 599 nm. EDAX profile provided a signal of atomic Se (1.45 Kev).XRD confirmed the crystalline nature of Se-NPLs. SEM and TEM observations show that spherical Se particles appeared with diameters ranging from 23 to 35 nm. A possible mechanism of the reduction of (SeO 3 2 À ) to (Se 0 ) was discussed. The electrical conductivity was measured with temperature and the activation energy was calculated. The photocatalytic study conducted that Se-NPLs have the efficiency to degrade sunset yellow dye and the mechanism of degradation has been proposed. Se-NPLs have been shown to be effective against three types of human cancers (Caco-2 cells, HepG2 cells, and Mcf-7 cells). Se-NPLs are potent anticancer and inhibit the growth of the three cancer cells as indicated by the IC 50 values. To conclude, the green-synthesized Se-NPLs may be a candidate for further evaluation as a chemotherapeutic agent for some human cancer treatment.

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Section: Resultsmentioning

confidence: 99%

Eco‐Friendly Approach to Synthesize Selenium Nanoparticles: Photocatalytic Degradation of Sunset Yellow Azo Dye and Anticancer Activity

2019

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“…Transesterification switches over fresh to dense microalgae lipids to decrease corrosive alkyl esters or the subatomic weight of fats, triacylglycerols, or safe unsaturated fats [22]. Several catalysts are employed in the process of transesterification such as alkaline, acid, enzymes, and heterogeneous inorganic catalyst [23]. In a comparison with conventional diesel, biodiesel can equilibrate the negative balance generated by the emission into the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fe+2 on the biomass, pigments, and essential fatty acids of ‏Arthrospira platensis

El‐Sheekh

Salman

Grmasha

et al. 2022

Biomass Conv. Bioref.

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The effects of different ferrous sulfate (FeSO4) concentrations on the fatty acid profile of the blue-green alga Arthrospira platensis cultured in Zarrouk’s medium to produce biodiesel were studied. Different ferrous sulfate concentrations (0, 0.005, 0.01, 0.05, and 0.1 g/L) and 0.01 g/L were examined on the biochemical composition of the alga and fatty acids profile of A. platensis. Findings revealed that the highest and lowest yields of fatty acid were 0 and 0.1 g/L FeSO4, respectively. It was also noticed an increase of palmitic acid, oleic acid, linoleic acid, γ-linolenic acid, and docosahexaenoic acid when ferrous sulfate was between 0.05 and 0.1 g/L, while these fatty acids decreased at low concentration. Ferrous sulfate at a concentration of 0.1 g/L exhibited an increase and best yields in the following: growth rate and the shortest doubling time, chlorophyll-a, phycocyanin, allophycocyanin, phycobiliproteins, and carotenoids. Thus, increasing the FeSO4 concentration to 0.1 g/L has led to the increase in fatty acid individuals, which in turn, resulted in potential enhancement of the biodiesel production from A. platensis.

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“…It is also more cost effective with the possibility of converting the heavy metals to low toxic forms. 135 Using Chlorella vulgaris as biosorbent for Cr( vi ) removal was found to be effective. At a dose of 1 g L −1 of algae and 50 mg of Cr per L for 4 hours and pH 2, the biosorption efficiency achieved 80%.…”

Section: Closed-loop Valorization Of Microalgaementioning

confidence: 99%

Anaerobic digestion and agronomic applications of microalgae for its sustainable valorization

2021

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Microalgae for biofuel production and removal of heavy metals: a review

Cited by 86 publications

References 156 publications

Eco‐Friendly Approach to Synthesize Selenium Nanoparticles: Photocatalytic Degradation of Sunset Yellow Azo Dye and Anticancer Activity

Eco‐Friendly Approach to Synthesize Selenium Nanoparticles: Photocatalytic Degradation of Sunset Yellow Azo Dye and Anticancer Activity

Influence of Fe+2 on the biomass, pigments, and essential fatty acids of ‏Arthrospira platensis

Anaerobic digestion and agronomic applications of microalgae for its sustainable valorization

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