Datos paper "Studies on bioremediation of Zn and acid waters using Botryococcus braunii"

Registro completo

Título

Datos paper "Studies on bioremediation of Zn and acid waters using Botryococcus braunii"

Autor(es)

Areco, María del Mar; Haug, Erika; Curutchet, Gustavo Andres

Afiliación(es) del/de los autor(es)

Areco, María del Mar. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentina
Haug, Erika. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina
Curutchet, Gustavo Andres. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentina

Resumen

In the present article the effects of Zn(II) on Botryococcus braunii in terms of growth and the photosynthesisrespiration metabolism and the ability of this microalgae to remove zinc present in wastewaters is described. The photosynthetic and respiration rates are affected by increasing metal concentration in solution, and therefore B. braunii growth rate decreases to a half, nevertheless the maximum value of biomass reached (770 ± 40 mg l−1) is the same and the biomass remains viable throughout the range of concentrations studied (0–80 mg l−1). B. braunii exposed the ability to reverse the acidic conditions of the medium, showing a pH increase from 5.2 till values above 8.0 favoring the precipitation of different zinc compounds. Zn(II) specific removal increases along with initial metal concentration. The net adsorption capacity was determined, and the Freundlich, Langmuir and Hill models were applied. The stoichiometric relationship between H+ release and zinc uptake in slightly acidic conditions is 1:1, and the adsorption kinetics follows a pseudo-second order model. The amount of metal removed increase when metabolic processes are involved. Removal of Zn with successive additions was achieved along 200 days, reaching a value of zinc removal of 3.4 g g−1. The remediation of heavy metals (zinc, nickel and copper) and nitrates present in a leachate obtained from a bioleaching process was successfully performed. The present work represents a new approach on the biotechnological potential of B. braunii to grow in acidic conditions and to remove zinc, while differentiates passive adsorption from metabolically active remediation.

Año de publicación

2023

Idioma

inglés

Formato (Tipo MIME)

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Clasificación temática de acuerdo a la FORD

Biotecnología ambiental

Condiciones de uso

Disponible en acceso abierto bajo licencia Creative Commons https://creativecommons.org/licenses/by-nc-sa/2.5/ar/

Repositorio digital

CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas

Identificador de proyecto

Ministerio de Ciencia. Tecnología e Innovación Productiva. Agencia Nacional de Promoción Científica y Tecnológica/PICT 2014-2386

Identificador de proyecto

Consejo Nacional de Investigaciones Científicas y Técnicas/PICT 2014-2386

Identificador de proyecto

/PICT 2014-2386