Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy
Anaerobic sediments of urban watercourses are subjected to industrial pollution and frequently tend to accumulate heavy metals. The biocatalyzed oxidation and reduction of sulphur compounds that occur within the sediment are key reactions that determine mobility of metals such as that occurred in mi...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_09441344_v24_n33_p25561_Porzionato |
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todo:paper_09441344_v24_n33_p25561_Porzionato2023-10-03T15:49:08Z Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy Porzionato, N. Tufo, A. Candal, R. Curutchet, G. Anaerobic polluted sediments Bioheap leaching Heavy metals Reconquista basin Remediation strategy Sulphur-oxidizing bacteria acidification anoxic sediment aqueous solution bacterium concentration (composition) drainage basin heavy metal metal oxidation reduction river basin sediment pollution sulfur compound Argentina Buenos Aires [Argentina] Reconquista River heavy metal anaerobic growth analysis Argentina bioremediation chemistry ecosystem restoration metabolism procedures river sediment water pollutant Anaerobiosis Argentina Biodegradation, Environmental Environmental Restoration and Remediation Geologic Sediments Metals, Heavy Rivers Water Pollutants, Chemical Anaerobic sediments of urban watercourses are subjected to industrial pollution and frequently tend to accumulate heavy metals. The biocatalyzed oxidation and reduction of sulphur compounds that occur within the sediment are key reactions that determine mobility of metals such as that occurred in mine acidic drainage reactions. The aim of this work was to study the application of these processes using heap leaching technology for the remediation of anaerobic contaminated sediments from Reconquista River basin. The bioleaching potentiality for remediation was demonstrated through batch tests in shake flasks with different pulp densities of anaerobic sediment containing 338 mg kg −1 of Zn and 117 mg kg −1 of Cu. Subsequently, bioleaching heap systems were compiled into columns of 12-cm height and 6-cm diameter, fitted with perlite to improve drainage. In order to assess the effect of elementary sulphur over the mobility of metals from the bioheap to the aqueous solution, increasing concentrations of elementary sulphur (1, 2, 5 % w/w) were added. After 3 months of acidification generated by periodic watering, the extraction of 70 % of the initial Zn and 43 % of the initial Cu was achieved. Polluted sediments from waterways as Reconquista River should not be indiscriminately manipulated if acid drainage is possible. Remediation by a simple and economically viable strategy like heap leaching is feasible. © 2016, Springer-Verlag Berlin Heidelberg. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09441344_v24_n33_p25561_Porzionato |
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Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Anaerobic polluted sediments Bioheap leaching Heavy metals Reconquista basin Remediation strategy Sulphur-oxidizing bacteria acidification anoxic sediment aqueous solution bacterium concentration (composition) drainage basin heavy metal metal oxidation reduction river basin sediment pollution sulfur compound Argentina Buenos Aires [Argentina] Reconquista River heavy metal anaerobic growth analysis Argentina bioremediation chemistry ecosystem restoration metabolism procedures river sediment water pollutant Anaerobiosis Argentina Biodegradation, Environmental Environmental Restoration and Remediation Geologic Sediments Metals, Heavy Rivers Water Pollutants, Chemical |
| spellingShingle |
Anaerobic polluted sediments Bioheap leaching Heavy metals Reconquista basin Remediation strategy Sulphur-oxidizing bacteria acidification anoxic sediment aqueous solution bacterium concentration (composition) drainage basin heavy metal metal oxidation reduction river basin sediment pollution sulfur compound Argentina Buenos Aires [Argentina] Reconquista River heavy metal anaerobic growth analysis Argentina bioremediation chemistry ecosystem restoration metabolism procedures river sediment water pollutant Anaerobiosis Argentina Biodegradation, Environmental Environmental Restoration and Remediation Geologic Sediments Metals, Heavy Rivers Water Pollutants, Chemical Porzionato, N. Tufo, A. Candal, R. Curutchet, G. Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy |
| topic_facet |
Anaerobic polluted sediments Bioheap leaching Heavy metals Reconquista basin Remediation strategy Sulphur-oxidizing bacteria acidification anoxic sediment aqueous solution bacterium concentration (composition) drainage basin heavy metal metal oxidation reduction river basin sediment pollution sulfur compound Argentina Buenos Aires [Argentina] Reconquista River heavy metal anaerobic growth analysis Argentina bioremediation chemistry ecosystem restoration metabolism procedures river sediment water pollutant Anaerobiosis Argentina Biodegradation, Environmental Environmental Restoration and Remediation Geologic Sediments Metals, Heavy Rivers Water Pollutants, Chemical |
| description |
Anaerobic sediments of urban watercourses are subjected to industrial pollution and frequently tend to accumulate heavy metals. The biocatalyzed oxidation and reduction of sulphur compounds that occur within the sediment are key reactions that determine mobility of metals such as that occurred in mine acidic drainage reactions. The aim of this work was to study the application of these processes using heap leaching technology for the remediation of anaerobic contaminated sediments from Reconquista River basin. The bioleaching potentiality for remediation was demonstrated through batch tests in shake flasks with different pulp densities of anaerobic sediment containing 338 mg kg −1 of Zn and 117 mg kg −1 of Cu. Subsequently, bioleaching heap systems were compiled into columns of 12-cm height and 6-cm diameter, fitted with perlite to improve drainage. In order to assess the effect of elementary sulphur over the mobility of metals from the bioheap to the aqueous solution, increasing concentrations of elementary sulphur (1, 2, 5 % w/w) were added. After 3 months of acidification generated by periodic watering, the extraction of 70 % of the initial Zn and 43 % of the initial Cu was achieved. Polluted sediments from waterways as Reconquista River should not be indiscriminately manipulated if acid drainage is possible. Remediation by a simple and economically viable strategy like heap leaching is feasible. © 2016, Springer-Verlag Berlin Heidelberg. |
| format |
JOUR |
| author |
Porzionato, N. Tufo, A. Candal, R. Curutchet, G. |
| author_facet |
Porzionato, N. Tufo, A. Candal, R. Curutchet, G. |
| author_sort |
Porzionato, N. |
| title |
Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy |
| title_short |
Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy |
| title_full |
Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy |
| title_fullStr |
Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy |
| title_full_unstemmed |
Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy |
| title_sort |
metal bioleaching from anaerobic sediments from reconquista river basin (argentina) as a potential remediation strategy |
| url |
http://hdl.handle.net/20.500.12110/paper_09441344_v24_n33_p25561_Porzionato |
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