Removal of copper improves the lipid content in Nannochloropsis oculata culture

Mining is an important activity for the economic development of many countries. However, this activity produces toxic residues that pollute water and the environment. The heavy metal removal from effluents of acid mine water is crucial to avoid environmental pollution. The microalga Nannochloropsis...

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Bibliographic Details
Published in:Environmental science and pollution research international 2020-12, Vol.27 (35), p.44195-44204
Main Authors: Aguilar-Ruiz, Rocio Janeth, Martínez-Macias, María del Rosario, Sánchez-Machado, Dalia Isabel, López-Cervantes, Jaime, Dévora-Isiordia, Germán Eduardo, Nateras-Ramírez, Omar
Format: Article
Language:English
Subjects:
Acid mine drainage
Acid mine water
Algae
Aquatic microorganisms
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Biodiesel fuels
Biofuels
Cell culture
Cell density
Copper
Density
Earth and Environmental Science
Economic development
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Growth rate
Heavy metals
Lipids
Mine drainage
Nannochloropsis oculata
Research Article
Waste Water Technology
Water Management
Water pollution
Water Pollution Control
Water treatment
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Summary:Mining is an important activity for the economic development of many countries. However, this activity produces toxic residues that pollute water and the environment. The heavy metal removal from effluents of acid mine water is crucial to avoid environmental pollution. The microalga Nannochloropsis oculata was cultured in algal medium, with the addition of 1.16, 1.74, 2.32, 3.48, and 4.64 mg Cu 2+  L −1 coming from acid mine water to assess its removal capacity and the effect of copper content on the cell density and lipid productivity. The results showed that N. oculata removed up to 94.88 ± 0.43% at copper concentration than 1.74 mg Cu 2+  L −1 ; additionally, a positive effect on the lipid content was found at copper concentration to be higher, 4.64 mg Cu 2+  L −1 , yielding 77.04 ± 2.60% of lipid content, twice as high as that achieved in the control culture of 33.058 ± 5.398%, thus potentiating the biodiesel production. These findings are favorable because they indicate that microalgae can remove copper added in the culture and present in acid mine water and can yield high lipid content at the same time. The cell density and growth rate decreased with increased concentrations of copper in the culture medium.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-020-10283-4