Characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical rivers
Interactions between two endocrine disruptors (ED) and aquatic humic substances (AHS) from tropical rivers were studied using an ultrafiltration system equipped with a 1 kDa cut-off cellulose membrane to separate free ED from the fraction bound in the AHS. Quantification of 17α-ethynylestradiol and bisphenol A was performed using gas chromatography-mass spectrometry (GC-MS). The times required for establishment of equilibrium between the AHS and the ED were ca. 30 min, and complexation capacities for 17α-ethynylestradiol and bisphenol A were 18.53 and 2.07 mg g-1 TOC, respectively. The greater interaction of AHS with 17α-ethynylestradiol, compared to bisphenol A, was due to the presence of hydrogen in the structure of 17α-ethynylestradiol, which could interact with ionized oxygenated groups of the AHS. The results indicate that AHS can strongly influence the transport and reactivity of endocrine disruptors in aquatic systems.
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Sociedade Brasileira de Química
2011
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oai:scielo:S0103-505320110006000152011-06-21Characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical riversBotero,Wander G.Oliveira,Luciana C. deCunha,Bruno B.Oliveira,Lílian K. deGoveia,DanielleRocha,Julio CesarFraceto,Leonardo F.Rosa,André Henrique water pollution endocrine disruptors aquatic humic substances complexation capacity Interactions between two endocrine disruptors (ED) and aquatic humic substances (AHS) from tropical rivers were studied using an ultrafiltration system equipped with a 1 kDa cut-off cellulose membrane to separate free ED from the fraction bound in the AHS. Quantification of 17α-ethynylestradiol and bisphenol A was performed using gas chromatography-mass spectrometry (GC-MS). The times required for establishment of equilibrium between the AHS and the ED were ca. 30 min, and complexation capacities for 17α-ethynylestradiol and bisphenol A were 18.53 and 2.07 mg g-1 TOC, respectively. The greater interaction of AHS with 17α-ethynylestradiol, compared to bisphenol A, was due to the presence of hydrogen in the structure of 17α-ethynylestradiol, which could interact with ionized oxygenated groups of the AHS. The results indicate that AHS can strongly influence the transport and reactivity of endocrine disruptors in aquatic systems.info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society v.22 n.6 20112011-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000600015en10.1590/S0103-50532011000600015 |
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Botero,Wander G. Oliveira,Luciana C. de Cunha,Bruno B. Oliveira,Lílian K. de Goveia,Danielle Rocha,Julio Cesar Fraceto,Leonardo F. Rosa,André Henrique |
| spellingShingle |
Botero,Wander G. Oliveira,Luciana C. de Cunha,Bruno B. Oliveira,Lílian K. de Goveia,Danielle Rocha,Julio Cesar Fraceto,Leonardo F. Rosa,André Henrique Characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical rivers |
| author_facet |
Botero,Wander G. Oliveira,Luciana C. de Cunha,Bruno B. Oliveira,Lílian K. de Goveia,Danielle Rocha,Julio Cesar Fraceto,Leonardo F. Rosa,André Henrique |
| author_sort |
Botero,Wander G. |
| title |
Characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical rivers |
| title_short |
Characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical rivers |
| title_full |
Characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical rivers |
| title_fullStr |
Characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical rivers |
| title_full_unstemmed |
Characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical rivers |
| title_sort |
characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical rivers |
| description |
Interactions between two endocrine disruptors (ED) and aquatic humic substances (AHS) from tropical rivers were studied using an ultrafiltration system equipped with a 1 kDa cut-off cellulose membrane to separate free ED from the fraction bound in the AHS. Quantification of 17α-ethynylestradiol and bisphenol A was performed using gas chromatography-mass spectrometry (GC-MS). The times required for establishment of equilibrium between the AHS and the ED were ca. 30 min, and complexation capacities for 17α-ethynylestradiol and bisphenol A were 18.53 and 2.07 mg g-1 TOC, respectively. The greater interaction of AHS with 17α-ethynylestradiol, compared to bisphenol A, was due to the presence of hydrogen in the structure of 17α-ethynylestradiol, which could interact with ionized oxygenated groups of the AHS. The results indicate that AHS can strongly influence the transport and reactivity of endocrine disruptors in aquatic systems. |
| publisher |
Sociedade Brasileira de Química |
| publishDate |
2011 |
| url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000600015 |
| work_keys_str_mv |
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