1. Adsorption of Estradiol by Natural Clays and Daphnia magna as Biological Filter in an Aqueous Mixture with Emerging Contaminants
- Author
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Eliza Jara-Negrete, Isabel Cipriani-Avila, Veronica Pinos-Velez, Andres Alvarado, Juan F. Cisneros, Mariana V. Capparelli, Andrés Pérez-González, and Piercosimo Tripaldi
- Subjects
Daphnia magna ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,Adsorption ,law ,zeolite ,Zeolite ,Filtration ,0105 earth and related environmental sciences ,emerging contaminants ,Chromatography ,Aqueous solution ,biology ,Chemistry ,bentonite ,natural clays ,021001 nanoscience & nanotechnology ,biology.organism_classification ,Triclosan ,TK1-9971 ,wastewater treatment ,adsorption ,Sewage treatment ,Water treatment ,Electrical engineering. Electronics. Nuclear engineering ,0210 nano-technology ,hormones, hormone substitutes, and hormone antagonists - Abstract
Among emerging pollutants, endocrine disruptors such as estradiol are of most concern. Conventional water treatment technologies are not capable of removing this compound from water. This study aims to assess a method that combines physicochemical and biological strategies to eliminate estradiol even when there are other compounds present in the water matrix. Na-montmorillonite, Ca-montmorillonite and zeolite were used to remove estradiol in a medium with sulfamethoxazole, triclosan, and nicotine using a Plackett–Burman experimental design, each treatment was followed by biological filtration with Daphnia magna. Results showed between 40 to 92% estradiol adsorption in clays, no other compounds present in the mixture were adsorbed. The most significant factors for estradiol adsorption were the presence of nicotine and triclosan which favored the adsorption, the use of Ca-montmorillonite, Zeolite, and time did not favor the adsorption of estradiol. After the physicochemical treatment, Daphnia magna was able to remove between 0–93% of the remaining estradiol. The combination of adsorption and biological filtration in optimal conditions allowed the removal of 98% of the initial estradiol concentration.
- Published
- 2021