Characterization of the interactions between endocrine disruptors and aquatic humic substances from tropical rivers

Journal of the Brazilian Chemical Society

Wander G. Botero²  Luciana C. De Oliveira¹  Bruno B. Cunha¹  Lílian K. De Oliveira²  Danielle Goveia²  Julio Cesar Rocha¹  Leonardo F. Fraceto¹  André Henrique Rosa¹ 

[1] ,Federal University of AlagoasArapiraca AL ,Brazil

关键词: water;    pollution;    endocrine disruptors;    aquatic humic substances;    complexation capacity;   

DOI  :  10.1590/S0103-50532011000600015

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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