Biosorption of copper, zinc, cadmium and nickel by<i>Chlorella vulgaris</i>

Fraile, Alberto; Penche, S.; González, F.; Blázquez, M.L.; Muñoz, J.A.; Ballester, A.

doi:10.1080/02757540512331334933

Cited by 79 publications

(41 citation statements)

References 13 publications

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“…The assessments were determined on seven days interval from 1 st day to 28 th day. Heavy metals (Zn, Cu, Fe, Ni and Cr) were assessed at different time intervals using Atomic Absorption Spectrophotometer (1983-400 HGA 900/AS 800 Perkin Elmer) and multi-Element Standard (MERCK-112837) (Fraile et al, 2005).…”

Section: Analysis Of Physio-chemical Propertiesmentioning

confidence: 99%

Chlorella vulgaris DPSF 01: A unique tool for removal of toxic chemicals from tannery wastewater

Subashini¹,

Rajiv²

2018

Afr. J. Biotechnol.

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The present study investigated the removal of toxic pollutants and reduction of heavy metals from tannery wastewater using Chlorella vulgaris. The physiochemical parameters like pH, electrical conductivity (EC), biological oxygen demand (BOD), chemical oxygen demand (COD), total solids (TS), total dissolved solids (TDS), chloride, total hardness (TH), bicarbonate, magnesium, ammoniacal nitrogen, phosphate and heavy metals (Cu, Cr, Zn, Ni and Fe) were analysed using standard methods. Functional group of toxic chemicals in tannery wastewater and C. vulgaris treated wastewater were analysed by Fourier transforms infrared spectroscopy (FT-IR) and gas chromatography -mass spectrometry (GC-MS). 20 to 60% of chemicals (bicarbonate, chloride, nitrogen, phosphate and magnesium) were reduced by the treatment using C. vulgaris within 28 days. FT-IR and GC-MS analysis reveals that the functional group of azo compounds was not in C. vulgaris treated wastewater. Thus, the results obtained conclude that C. vulgaris can be used as a suitable tool for the removal of toxic chemicals of tannery wastewater.

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Section: Analysis Of Physio-chemical Propertiesmentioning

confidence: 99%

Chlorella vulgaris DPSF 01: A unique tool for removal of toxic chemicals from tannery wastewater

Subashini¹,

Rajiv²

2018

Afr. J. Biotechnol.

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“…Metal ions can accordingly be grouped into class ''a'', ''b'' or borderline ions, on the basis of their covalent indices; both metals used in our study are borderline ions, and Tsezos et al (1996) claimed that ionic competition is greater (and thus more unfavourable) between metals belonging to the same class. Studies reported by Fraile et al (2005) encompassing the simultaneous removal of Zn 2? and Cd 2?…”

Section: Resultsmentioning

confidence: 98%

“…The environmental injuries brought about by such effluents have received major attention by national and international authorities, and consequently led to directives and regulations aimed at minimizing their impact. In attempts to remove (or, at least, reduce the concentration of) those toxic metals, distinct types of microbial biomass have been scrutinized as alternatives to conventional physicochemical technologies (Aksu and Dönmez 2006;Puranik and Paknikar 1999;Sag et al 2000;Vilar et al 2008); the latter are in fact characterized by a limited effectiveness, and are typically too expensive when the target metal concentration is at the ppm level or below (Fraile et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Capacity of simultaneous removal of zinc and cadmium from contaminated media, by two microalgae isolated from a polluted site

2011

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Several aquatic environments have been contaminated with heavy metals dumped via industrial effluents. Numerous studies have been published regarding the removal of single metals from aqueous solutions by microalgal biomass. However, such studies do not reflect the actual problem associated with industrial effluents because usually more than one metal species is present. Here we studied the biosorption capacity of Zn 2? and Cd 2? as single-and binarymetal systems by two microalgae, Scenedesmus obliquus and Desmodesmus pleiomorphus, isolated from a polluted site in Northern Portugal. For each metal independently, D. pleiomorphus showed a higher metal sorption capacity than S. obliquus, at concentrations ranging from 60 to 300 mg/l (except 150 mg Cd /l). Maximum amounts of Zn 2? and Cd 2? removed were 22.3 and 60.8 mg/g by S. obliquus, and 83.1 and 58.6 mg/g by D. pleiomorphus. In binary-metal solutions, S. obliquus was in general able to remove Zn 2? to higher extents than Cd 2? , whereas the opposite was observed with D. pleiomorphus. The simultaneous uptake of Zn 2? and Cd 2? by both microalgae was considerably lower than that of their single-metal counterparts, at equivalent concentrations. Although microalgal uptake from binary-metal solutions was lower than from single-metal ones, the wild microalgae selected were able to efficiently take up mixtures of Zn 2? and Cd 2? up to 300 mg/l of both metals-thus materializing a promising bioremediation vector for polluted waters.

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“…It has been claimed that increasing biomass reduces the intrinsic metal removal capacity, because the solute becomes less available, and unfavourable interference between binding sites and electrostatic interactions is enhanced (Fourest and Roux 1992). Other studies (Ahuja et al 1999;Fraile et al 2005) have indeed indicated that electrostatic interactions between cells play an important role in this type of process, and that the shell effect on the external layer at high cell densities constrains the availability of active sites themselves.…”

Section: Discussionmentioning

confidence: 95%

Characterization of Desmodesmus pleiomorphus isolated from a heavy metal-contaminated site: biosorption of zinc

et al. 2009

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Microalgae have been proven efficient biological vectors for heavy metal uptake. In order to further study their biosorption potential, a strain of Desmodesmus pleiomorphus (L) was isolated from a strongly contaminated industrial site in Portugal. Under different initial Zn(2+) concentrations, metal removal by that strain reached a maximum of 360 mg Zn/g biomass after 7 days, at 30 mg Zn/l, after an initial rapid phase of uptake. Comparative studies were carried out using a strain of the same microalgal species that is commercially available (ACOI 561): when exposed to 30 mg Zn/l, it could remove only 81.8 mg Zn/g biomass. Biosorption experiments using inactivated biomass of the isolated strain reached a maximum Zn(2+) uptake of 103.7 mg/g. Metal removal at various initial pH values was studied as well; higher removal was obtained at pH 5.0. The microalga strain L, isolated from the contaminated site, exhibited a much higher removal capacity than the commercial strain, and the living biomass yielded higher levels of metal removal than its inactivated form.

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Biosorption of copper, zinc, cadmium and nickel byChlorella vulgaris

Cited by 79 publications

References 13 publications

Chlorella vulgaris DPSF 01: A unique tool for removal of toxic chemicals from tannery wastewater

Chlorella vulgaris DPSF 01: A unique tool for removal of toxic chemicals from tannery wastewater

Capacity of simultaneous removal of zinc and cadmium from contaminated media, by two microalgae isolated from a polluted site

Characterization of Desmodesmus pleiomorphus isolated from a heavy metal-contaminated site: biosorption of zinc

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