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Cadmium biosorption on Spirulina platensis biomass.

Identifieur interne : 000468 ( Ncbi/Merge ); précédent : 000467; suivant : 000469

Cadmium biosorption on Spirulina platensis biomass.

Auteurs : C. Solisio [Italie] ; A. Lodi ; D. Soletto ; A. Converti

Source :

Bioresource technology [ 0960-8524 ] ; 2008.

RBID : pubmed:18082399

English descriptors

KwdEn :
- Adsorption, Biodegradation, Environmental, Biomass, Cadmium (metabolism), Desiccation, Environmental Pollution, Kinetics, Metals, Heavy (metabolism), Models, Biological, Spirulina (growth & development), Spirulina (metabolism), Water Microbiology.
MESH :
- chemical , metabolism : Cadmium, Metals, Heavy.
- growth & development : Spirulina.
- metabolism : Spirulina.
- Adsorption, Biodegradation, Environmental, Biomass, Desiccation, Environmental Pollution, Kinetics, Models, Biological, Water Microbiology.

Abstract

Dry biomass of Spirulina platensis re-hydrated for 48 h was employed as a biosorbent in tests of cadmium(II) removal from water. Various concentrations of biomass (from 1 to 4 g l(-1)) and metal (from 100 to 800 mg l(-1)) were tested. Low biomass levels (X(o)2 g l(-1)) ensured metal removal up to 98% only at Cd(0)= 100 and 200 mg l(-1), while X(o)2.0 g l(-1) were needed at Cd(0)=400 mg l(-1) to achieve satisfactory results. Whereas X(o)=4.0 g l(-1) was effective to remove up to Cd(0)=500 mg l(-1), a further increase in metal concentration (Cd(0)=600 and 800 mg l(-1)) led to progressive worsening of the system performance. At a given biomass levels, the kinetics of the process was better at low Cd(2+) concentrations, while, raising the adsorbent level from 1.0 to 2.0 g l(-1) and then to 4.0 g l(-1), the rate constant of biosorption increased by about one order of magnitude in both cases and the adsorption capacity of the system progressively decreased from 357 to 149 mg g(-1).

DOI: 10.1016/j.biortech.2007.11.002
PubMed: 18082399

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Le document en format XML

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<author><name sortKey="Solisio, C" sort="Solisio, C" uniqKey="Solisio C" first="C" last="Solisio">C. Solisio</name>
<affiliation wicri:level="1"><nlm:affiliation>Department of Chemical and Process Engineering "G.B. Bonino", Genoa University, via Opera Pia 15, I-16145 Genoa, Italy.</nlm:affiliation>
<country xml:lang="fr">Italie</country>
<wicri:regionArea>Department of Chemical and Process Engineering "G.B. Bonino", Genoa University, via Opera Pia 15, I-16145 Genoa</wicri:regionArea>
<wicri:noRegion>I-16145 Genoa</wicri:noRegion>
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<author><name sortKey="Lodi, A" sort="Lodi, A" uniqKey="Lodi A" first="A" last="Lodi">A. Lodi</name>
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<author><name sortKey="Soletto, D" sort="Soletto, D" uniqKey="Soletto D" first="D" last="Soletto">D. Soletto</name>
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<author><name sortKey="Converti, A" sort="Converti, A" uniqKey="Converti A" first="A" last="Converti">A. Converti</name>
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<series><title level="j">Bioresource technology</title>
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<term>Desiccation</term>
<term>Environmental Pollution</term>
<term>Kinetics</term>
<term>Metals, Heavy (metabolism)</term>
<term>Models, Biological</term>
<term>Spirulina (growth & development)</term>
<term>Spirulina (metabolism)</term>
<term>Water Microbiology</term>
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<term>Metals, Heavy</term>
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<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Spirulina</term>
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<term>Biodegradation, Environmental</term>
<term>Biomass</term>
<term>Desiccation</term>
<term>Environmental Pollution</term>
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<front><div type="abstract" xml:lang="en">Dry biomass of Spirulina platensis re-hydrated for 48 h was employed as a biosorbent in tests of cadmium(II) removal from water. Various concentrations of biomass (from 1 to 4 g l(-1)) and metal (from 100 to 800 mg l(-1)) were tested. Low biomass levels (X(o)2 g l(-1)) ensured metal removal up to 98% only at Cd(0)= 100 and 200 mg l(-1), while X(o)2.0 g l(-1) were needed at Cd(0)=400 mg l(-1) to achieve satisfactory results. Whereas X(o)=4.0 g l(-1) was effective to remove up to Cd(0)=500 mg l(-1), a further increase in metal concentration (Cd(0)=600 and 800 mg l(-1)) led to progressive worsening of the system performance. At a given biomass levels, the kinetics of the process was better at low Cd(2+) concentrations, while, raising the adsorbent level from 1.0 to 2.0 g l(-1) and then to 4.0 g l(-1), the rate constant of biosorption increased by about one order of magnitude in both cases and the adsorption capacity of the system progressively decreased from 357 to 149 mg g(-1).</div>
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<Issue>13</Issue>
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<Title>Bioresource technology</Title>
<ISOAbbreviation>Bioresour. Technol.</ISOAbbreviation>
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<ArticleTitle>Cadmium biosorption on Spirulina platensis biomass.</ArticleTitle>
<Pagination><MedlinePgn>5933-7</MedlinePgn>
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<Abstract><AbstractText>Dry biomass of Spirulina platensis re-hydrated for 48 h was employed as a biosorbent in tests of cadmium(II) removal from water. Various concentrations of biomass (from 1 to 4 g l(-1)) and metal (from 100 to 800 mg l(-1)) were tested. Low biomass levels (X(o)2 g l(-1)) ensured metal removal up to 98% only at Cd(0)= 100 and 200 mg l(-1), while X(o)2.0 g l(-1) were needed at Cd(0)=400 mg l(-1) to achieve satisfactory results. Whereas X(o)=4.0 g l(-1) was effective to remove up to Cd(0)=500 mg l(-1), a further increase in metal concentration (Cd(0)=600 and 800 mg l(-1)) led to progressive worsening of the system performance. At a given biomass levels, the kinetics of the process was better at low Cd(2+) concentrations, while, raising the adsorbent level from 1.0 to 2.0 g l(-1) and then to 4.0 g l(-1), the rate constant of biosorption increased by about one order of magnitude in both cases and the adsorption capacity of the system progressively decreased from 357 to 149 mg g(-1).</AbstractText>
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Cadmium biosorption on Spirulina platensis biomass.

Cadmium biosorption on Spirulina platensis biomass.

Source :

English descriptors

Abstract

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