Study on the removal of hormones from domestic wastewaters with lab-scale constructed wetlands with different substrates and flow directions.
Environ Sci Pollut Res Int
; 25(21): 20374-20384, 2018 Jul.
Article
em En
| MEDLINE
| ID: mdl-28567681
ABSTRACT
Eight wastewater samples from a university campus were analysed between May and July of 2014 to determine the concentration of 14 natural and synthetic steroid hormones. An on-line solid-phase extraction combined with ultra-high performance liquid chromatography coupled with mass spectrometry (on-line SPE-UHPLC-MS/MS) was used as extraction, pre-concentration and detection method. In the samples studied, three oestrogens (17ß-estradiol, estrone and estriol), two androgens (boldenone and testosterone), three progestogens (norgestrel, progesterone and norethisterone) and one glucocorticoid (prednisone) were detected. The removal of hormones was studied in primary and secondary constructed wetland mesocosms. The porous media of the primary constructed wetlands were palm tree mulch. These reactors were used to study the effect of water flow, i.e. horizontal (HF1) vs vertical (VF1). The latter was more efficient in the removal of 17ß-estradiol (HF1 30%, VF1 50%), estrone (HF1 63%, VF1 85%), estriol (100% both), testosterone (HF1 45%, VF1 73%), boldenone (HF1-77%, VF1 100%) and progesterone (HF1 84%, VF1 99%). The effluent of HF1 was used as influent of three secondary constructed wetland mesocosms two double-stage vertical flow constructed wetlands, one with gravel (VF2gravel) and one with palm mulch (VF2mulch), and a mineral-based, horizontal flow constructed wetland (HFmineral). VF2mulch was the most efficient of the secondary reactors, since it achieved the complete removal of the hormones studied with the exception of 17ß-estradiol. The significantly better removal of BOD and ammonia attained by VF2mulch suggests that the better aeration of mulch favoured the more efficient removal of hormones.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Solo
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Movimentos da Água
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Eliminação de Resíduos Líquidos
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Purificação da Água
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Áreas Alagadas
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Águas Residuárias
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Hormônios
Idioma:
En
Revista:
Environ Sci Pollut Res Int
Assunto da revista:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Espanha
País de publicação:
ALEMANHA
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ALEMANIA
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DE
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DEUSTCHLAND
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GERMANY