Toxic effects of cadmium (Cd) on anaerobic biomass: Kinetic and metabolic implications
Cadmium ion (Cd) toxicity on anaerobic systems, used for organic matter removal, was assessed by studying its effect on kinetic parameters and metabolic changes. This fundamental study was performed in a continuous fixed bed anaerobic bioreactor that treated synthetic wastewater simulating domestic...
| Publicado en: | Journal of Environmental Management Vol. 106; pp. 75 - 85 |
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| Autores principales: | , , , |
| Formato: | Artículo |
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Academic Press Inc.
Sep2012
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=76478177&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 76478177 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Sep2012 vid: 106 pid: 735 pub: Academic Press Inc. artinfo: ui: 76478177 10.1016/j.jenvman.2012.03.056 ppf: 75 ppct: 10 formats: tig: atl: Toxic effects of cadmium (Cd) on anaerobic biomass: Kinetic and metabolic implications aug: au: Mockaitis, G. Rodrigues, J.A.D. Foresti, E. Zaiat, M. affil: Hydraulics and Sanitation Department, São Carlos Engineering School, Universidade de São Paulo (SHS/EESC/USP), Av. Trabalhador São-Carlense 400, CEP 13.566-590, São Carlos, SP, Brazil Mauá Engineering School, Mauá Institute of Technology (EEM/IMT), Praça Mauá 1, CEP 09.580-900, São Caetano do Sul, SP, Brazil su: Effect of heavy metals on bacteria Cadmium poisoning Fixed bed reactors Continuous processing Anaerobic bacteria Bacterial metabolism Anaerobic digestion sug: subj: Effect of heavy metals on bacteria Cadmium poisoning Fixed bed reactors Continuous processing Anaerobic bacteria Bacterial metabolism Anaerobic digestion keyword: Anaerobic fixed bed bioreactor Anaerobic processes Cadmium Methanogenesis Toxicity Anaerobic fixed bed bioreactor Anaerobic processes Cadmium Methanogenesis Toxicity ab: Cadmium ion (Cd) toxicity on anaerobic systems, used for organic matter removal, was assessed by studying its effect on kinetic parameters and metabolic changes. This fundamental study was performed in a continuous fixed bed anaerobic bioreactor that treated synthetic wastewater simulating domestic sewage. The biomass was immobilized on a fixed bed made of polyurethane foam. Under influent cadmium concentrations of 0.0, 0.4, 4.4 and 6.2 mg Cd L the organic matter removal efficiencies were 84%, 82%, 72% and 52%, respectively. At influent concentration of 6.2 mg Cd L the reactor had reached its limit for cadmium toxicity. In the removal of dissolved organic matter, the first-order apparent kinetic coefficients () were 0.84, 0.67 and 0.10 h for the operations with 0.0, 0.4 and 4.4 mg Cd L, respectively. The apparent inhibition coefficient for cadmium () was 1.69 mg L. Despite the toxic effects of cadmium on anaerobic organic matter removal at large Cd concentrations, the results demonstrated that the anaerobic process was suitable for cadmium concentrations below 29.8 mg Cd L, considering the bioavailable fraction of adsorbed cadmium in the support when the cadmium influent concentration was 6.2 mg Cd L. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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