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Activated sludge respirometry to assess solar detoxification of a metal finishing effluent.
J Hazard Mater. 2008 May 30; 153(3):905-10.JH

Abstract

Inhibition of the respiration of activated sludge has been tested as a convenient method to estimate toxicity of aqueous solutions containing copper and cyanide, such as metal finishing effluents; according to this method, an EC50 of 0.5 mg/l was determined for CN(-) and 3.0 mg/l for copper. Solar detoxification of cyanide-containing solutions was studied using TiO2, but this process was unfavourable because of the inhibitory role that plays the copper ions present in real effluents on the oxidation of cyanide. On the other hand, the oxidative effect of hydrogen peroxide was greatly enhanced by Cu2+ and solar irradiation, as complete elimination of free and complexed cyanide could be accomplished, together with precipitation of copper, in experiments carried out at pilot plant scale with real metal finishing effluents. Under these conditions, total detoxification was achieved according to respirometric measurements although some remaining toxicity was determined by more sensitive Vibrio fischeri luminescent assay.

Authors+Show Affiliations

Departamento de Ingeniería Textil y Papelera, Escuela Politécnica Superior de Alcoy, Universidad Politécnica de Valencia, Plaza Ferrándiz y Carbonell s/n, E-03801 Alcoy, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17950998

Citation

Santos-Juanes, L, et al. "Activated Sludge Respirometry to Assess Solar Detoxification of a Metal Finishing Effluent." Journal of Hazardous Materials, vol. 153, no. 3, 2008, pp. 905-10.
Santos-Juanes L, Amat AM, Arques A, et al. Activated sludge respirometry to assess solar detoxification of a metal finishing effluent. J Hazard Mater. 2008;153(3):905-10.
Santos-Juanes, L., Amat, A. M., Arques, A., Bernabeu, A., Silvestre, M., Vicente, R., & Añó, E. (2008). Activated sludge respirometry to assess solar detoxification of a metal finishing effluent. Journal of Hazardous Materials, 153(3), 905-10.
Santos-Juanes L, et al. Activated Sludge Respirometry to Assess Solar Detoxification of a Metal Finishing Effluent. J Hazard Mater. 2008 May 30;153(3):905-10. PubMed PMID: 17950998.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Activated sludge respirometry to assess solar detoxification of a metal finishing effluent. AU - Santos-Juanes,L, AU - Amat,A M, AU - Arques,A, AU - Bernabeu,A, AU - Silvestre,M, AU - Vicente,R, AU - Añó,E, Y1 - 2007/09/14/ PY - 2007/06/26/received PY - 2007/09/10/revised PY - 2007/09/11/accepted PY - 2007/10/24/pubmed PY - 2008/7/11/medline PY - 2007/10/24/entrez SP - 905 EP - 10 JF - Journal of hazardous materials JO - J Hazard Mater VL - 153 IS - 3 N2 - Inhibition of the respiration of activated sludge has been tested as a convenient method to estimate toxicity of aqueous solutions containing copper and cyanide, such as metal finishing effluents; according to this method, an EC50 of 0.5 mg/l was determined for CN(-) and 3.0 mg/l for copper. Solar detoxification of cyanide-containing solutions was studied using TiO2, but this process was unfavourable because of the inhibitory role that plays the copper ions present in real effluents on the oxidation of cyanide. On the other hand, the oxidative effect of hydrogen peroxide was greatly enhanced by Cu2+ and solar irradiation, as complete elimination of free and complexed cyanide could be accomplished, together with precipitation of copper, in experiments carried out at pilot plant scale with real metal finishing effluents. Under these conditions, total detoxification was achieved according to respirometric measurements although some remaining toxicity was determined by more sensitive Vibrio fischeri luminescent assay. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17950998/Activated_sludge_respirometry_to_assess_solar_detoxification_of_a_metal_finishing_effluent_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(07)01319-2 DB - PRIME DP - Unbound Medicine ER -