INVESTIGADORES
PAISIO Cintia Elizabeth
artículos
Título:
TOLERANCE AND REMOVAL OF CR(VI) BY BRASSICA NAPUS HAIRY ROOTS
Autor/es:
PEROTTI R.; PAISIO C.,; FERNANDEZ, M.; ELIZABETH AGOSTINI.; PAOLA S. GONZÁLEZ
Revista:
BIOCELL
Editorial:
Biocell
Referencias:
Año: 2018
ISSN:
1667-5746
Resumen:
Chromium (Cr) is one of the highly toxic inorganic pollutants used in industrial activities, such as leather tanning. Currently, there is increase concern to reduce environmental levels of this heavy metal. Phytoremediation has several advantages and public acceptance to be employed for this purpose. In this work, tolerance and remediation of Cr(VI) by hairy roots (HR), as well as the mechanisms involved in the process were evaluated. The final localization of Cr after removal was also analyzed. Results show that HR were able to tolerate up to 10 mg/L Cr(VI) and to remove up to 90% of this concentration. Cr(VI) internalization and, to a lesser extent, adsorption were the mechanisms involved in the removal. Part of Cr(VI) was reduced intracellularly to Cr(III), suggesting the participation of reductases. Regarding to enzymes belonging to the antioxidant system, superoxide dismutase activity showed no differences respect to the control and peroxidase activity showed a significant decrease. Additionally, two bioassays were performance after removal process to evaluate toxicity. Moderate phytotoxicity was detected in Lactuca sativa L. test, which would be attributable to compounds produced in the removal process, whereas AMPHITOX test showed that post removal solutions did not present toxicity.In conclusion, HR would be an efficient tool to treat contaminated water with Cr(VI) concentrations below 10 mg/L.