Bioremediation of oxytetracycline in seawater by living and dead biomass of the microalga Phaeodactylum tricornutum
| Autor: | Sergio Santaeufemia, Roi Mera, Julio Abalde, Enrique Torres |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Biomass Oxytetracycline 02 engineering and technology 010501 environmental sciences Biology Phaeodactylum tricornutum 01 natural sciences Bioremediation medicine Microalgae Environmental Chemistry Seawater Living biomass Photodegradation Waste Management and Disposal 0105 earth and related environmental sciences Photolysis Aquatic ecosystem Environmental engineering Sorption 021001 nanoscience & nanotechnology biology.organism_classification Pollution Kinetics Biodegradation Environmental Environmental chemistry Thermodynamics 0210 nano-technology Water Pollutants Chemical medicine.drug |
| Zdroj: | RUC. Repositorio da Universidade da Coruña instname |
| ISSN: | 1873-3336 |
| Popis: | Due to its use, a large amount of Oxytetracycline (OTC) is released into water, which has a detrimental impact on aquatic ecosystems and human health. Although there are different physicochemical methods (mainly photodegradation) to remove OTC, there is increasing interest in the use of bioremediation. The sorption characteristics of OTC using living and dead biomass of the microalga Phaeodactylum tricornutum have been investigated in this study. Kinetics, isotherms and maximum elimination capacity were tested and discussed. Kinetic studies showed that the OTC removal by living biomass followed a sigmoidal model. However, the dead biomass followed a pseudo-first order model. The living biomass showed higher efficiency than the dead biomass with maximum sorption capacities of 29.18 mg g−1 and 4.54 mg g−1, respectively. Combination of living biomass and photodegradation under the culture conditions eliminated 13.2 mg L−1 of OTC during 11 h of culture and with an initial OTC concentration of 15 mg L−1. With an initial OTC concentration of 2.5 mg L−1, 97% of OTC was removed. This removal was mainly caused by bioremediation than by photodegradation. The results proved the potential practical application of the living P. tricornutum biomass for a low-cost and efficient removal of OTC from seawater. |
| Databáze: | OpenAIRE |
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