The adsorption kinetics of metal ions onto different microalgae and siliceous earth

Schmitt, Daniel; Müller, Andreas; Csögör, Zsuzsa; Frimmel, Fritz H.; Posten, Clemens

doi:10.1016/s0043-1354(00)00317-1

Cited by 132 publications

(45 citation statements)

References 10 publications

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“…Schmitt et al (2001) reported that S. subspicatus was able to remove a maximum of 72.06±9.59 and 9.20±9.98 mg/g biomass after exposure to 0.5 mg/L Zn 2+ and 0.3 mg/L Hg 2+ , respectively; those values were extrapolated as the asymptotic estimates of the saturation parameters in Langmuir models. Vannela and Verma (2006) reported, in turn, that the maximum Zn 2+ adsorption capacity by living cells of S. platensis was 250.3 ±26.4 mg/g biomass , when in the presence of 800 mg/L Zn 2+ .…”

Section: Discussionmentioning

confidence: 99%

“…This latter method of uptake (denoted as 'biosorption' or 'passive uptake') occurs very fast and even in non-viable cells, whereas heavy metal uptake encompassing incorporation in the cell cytoplasm itself, after the cell membrane has been crossed (referred to as 'active uptake'), is usually slower (Cruz et al 2004;Schmitt et al 2001). Biosorption of (toxic) heavy metals by microalgae has been reported by several authors (Nacorda et al 2007;Nalimova et al 2005;Schmitt et al 2001;Senthilkumar et al 2006;Tripathi and Gaur 2006); microalgal strains originally isolated from contaminated sites are likely more tolerant, and thus exhibit a greater uptake capacity of the metals present in their original media than strains obtained from clean environments, or kept on artificial media devoid of such ecological stress. A number of resistance mechanisms can come into play in this particular; Monteiro et al (2011) have indeed proven the higher uptake ability of a microalga strain isolated from a wild consortium, Scenedesmus obliquus, relative to another strain of the same species obtained from a non-contaminated environment-which thus served as control: a much higher extent of Zn was removed (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Modelling growth of, and removal of Zn and Hg by a wild microalgal consortium

Monteiro

Brandão

Castro

et al. 2012

Appl Microbiol Biotechnol

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Microorganisms isolated from sites contaminated with heavy metals usually possess a higher removal capacity than strains from regular cultures. Heavy metal-containing soil samples from an industrial dumpsite in Northern Portugal were accordingly collected; following enrichment under metal stress, a consortium of wild microalgae was obtained. Their ability to grow in the presence of, and their capacity to recover heavy metals was comprehensively studied; the datasets thus generated were fitted to by a combined model of biomass growth and metal uptake, derived from first principles. After exposure to 15 and 25 mg/L Zn(2+) for 6 days, the microalgal consortium reached similar, or higher cell density than the control; however, under 50 and 65 mg/L Zn(2+), 71% to 84% inhibition was observed. Growth in the presence of Hg(2+) was significantly inhibited, even at a concentration as low as 25 μg/L, and 90% inhibition was observed above 100 μg/L. The maximum amount of Zn(2+) removed was 21.3 mg/L, upon exposure to 25 mg/L for 6 day, whereas the maximum removal of Hg(2+) was 335 μg/L, upon 6 day in the presence of 350 μg/L. The aforementioned mechanistic model was built upon Monod assumptions (including heavy metal inhibition), coupled with Leudeking-Piret relationships between the rates of biomass growth and metal removal. The overall fits were good under all experimental conditions tested, thus conveying a useful tool for rational optimisation of microalga-mediated bioremediation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modelling growth of, and removal of Zn and Hg by a wild microalgal consortium

Monteiro

Brandão

Castro

et al. 2012

Appl Microbiol Biotechnol

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“…It seems that zinc-binding ability of the studied species is in the ''medium range'' in comparison with that of some other green algae, similarly to their zinc tolerance. There are more capable isolates: Schmitt et al (2001) claimed maximum specific adsorption capacities of 72.06 mg g -1…”

Section: Removal Of Zincmentioning

confidence: 99%

The sensitivity of two Monoraphidium species to zinc: their possible future role in bioremediation

Bácsi

Novàk

Jánószky³

et al. 2014

Int. J. Environ. Sci. Technol.

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Effects of zinc on growth, cell morphology, oxidative stress responses and zinc removal activity of two common phytoplankton species, Monoraphidium pusillum (Printz) Komárková-Legnerová and Monoraphidium griffithii (Berkeley) Komárková-Legnerová were investigated at a concentration range of 0.2-160 mg l -1 zinc. Cell densities and chlorophyll content decreased compared with controls in cultures of both species, effective concentrations causing 50 % growth inhibition within 72 h on the basis of cell numbers were 33.69 and 25.63 mg l -1 zinc for M. pusillum and M. griffithii, respectively. Changes in cell morphology and elevated lipid peroxidation levels appeared in zinc-treated cultures of both species, but only at higher ([10 mg l -1 ) zinc concentrations. The most effective zinc removal appeared at 20 and 10 mg l -1 zinc concentration for M. pusillum and M. griffithii, respectively. Removed zinc is mainly bound on the cell surface in the case of both species. This study provides new data for the zinc tolerance and zinc removal ability of the green algae M. pusillum and M. griffithii and shows that green algal species common in surface waters could have zinc tolerance and zinc-binding abilities, which makes them feasible in treatment of waters contaminated with 10-20 mg l -1 zinc.

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“…Even though the literature presents papers using bacteria (da Costa and Duta, 2001), algal cells (Schmitt et al 2001), fungi (McAfee et al 2001) and other biomaterials (Lister and Line, 2001;Schneider et al 2001), little is known about the behavior of a continuous system, for this kind of treatment. The purpose of the present work was to investigate the behavior of continuous serial reactors for the uptake of zinc.…”

Section: * Corresponding Authormentioning

confidence: 99%

The release of light metals from a brown seaweed (Sargassum sp.) during zinc biosorption in a continuous system

Costa¹,

Tavares²,

França³

2001

Electron. J. Biotechnol.

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Financial support: CNPq (Conselho Nacional do Desenvolvimento Científico e Tecnológico), CAPES and UERJ (Universidade do Estado do Rio de Janeiro).Keywords: biomass, heavy metal, uptake, wastewater. * Corresponding authorThe biosorption of zinc and calcium was investigated with a biomass of Sargassum sp., a brown seaweed, in a continuous system consisting of three serial tubular fixed-bed laboratory reactors. Results indicated that zinc was efficiently recovered by the biomass. After treatment of 9.0 liters of a mixed solution containing 130.0 mg/l zinc and 260.0 mg/l calcium, the first column of the system saturated with zinc; the remaining columns did not saturate with zinc as a result of the pre treatment performed by the first reactor. Calcium was also efficiently biosorbed by the biomass, saturating the system much faster than zinc. X-ray fluorescence spectrum indicated the presence of various elements in the structure of the Sargassum sp. biomass, especially alkaline and alkaline-earth elements. Alkaline and alkaline earth elements played a key role in the biosorption of zinc, being responsible for ion-exchange reactions performed during zinc biosorption.Nonliving seaweed biomass can be used in the development of biosorbent materials to accumulate heavy metals. The biomass, in this case, must be selective, reusable and cheap, thus constituting an alternative technology for residual metal ions recovery. Non living biomass of seaweeds can be used for this purpose, being an efficient treatment for heavy metals contaminated effluents.For the uptake of heavy metals two different reactor configurations can be used: continuous stirred tank reactor and fixed bed columns.Even though the literature presents papers using bacteria (da Costa and Duta, 2001), algal cells (Schmitt et al. 2001), fungi (McAfee et al. 2001) and other biomaterials (Lister and Line, 2001;Schneider et al. 2001), little is known about the behavior of a continuous system, for this kind of treatment. The purpose of the present work was to investigate the behavior of continuous serial reactors for the uptake of zinc. As well, little is known about ion-exchange properties of the biomass. Most papers describe this process as a typical adsorption process, not investigating the

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The adsorption kinetics of metal ions onto different microalgae and siliceous earth

Cited by 132 publications

References 10 publications

Modelling growth of, and removal of Zn and Hg by a wild microalgal consortium

Modelling growth of, and removal of Zn and Hg by a wild microalgal consortium

The sensitivity of two Monoraphidium species to zinc: their possible future role in bioremediation

The release of light metals from a brown seaweed (Sargassum sp.) during zinc biosorption in a continuous system

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