title: Removal of phenolic endocrine disruptors by Portulaca oleracea.
abstract: Portulaca oleracea, a garden plant prevalent from spring to autumn in Japan, showed the ability to efficiently remove from water bisphenol A (BPA), which is well known as an endocrine disrupting compound (EDC) having estrogenic properties. In water culture, 50 muM BPA was almost completely removed within 24 h when the ratio of whole plant weight to the water volume was set up at 1 g to 25 ml. The estrogenic activity of the water decreased in parallel with the elimination of BPA. This plant also rapidly removed other EDCs having a phenol group including octylphenol (OP), nonylphenol (NP), 2,4-dichlorophenol (2,4-DCP) and 17beta-estradiol and, thereby, removed the endocrine disrupting activities. In addition, the ability of P. oleracea to remove BPA was not affected by BPA concentration (up to 250 microM), by cultivation in the dark, by temperatures ranging from 15 degrees C to 30 degrees C, or by pH ranging from 4 to 7. Moreover, the ability of P. oleracea to individually remove BPA, NP, and OP was the same as when they were all present. These results suggest that P. oleracea is a promising material for practical phytoremediation of landfill leachates and industrial wastewater contaminated with the tested EDCs.
authors.affiliation: Department of Applied Environmental Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka, Japan.
authors.forename: Sofue
authors.initials: S
authors.lastname: Imai
authors.forename: Atsuhiko
authors.initials: A
authors.lastname: Shiraishi
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Gamo
authors.forename: Ippei
authors.initials: I
authors.lastname: Watanabe
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Okuhata
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Miyasaka
authors.forename: Kazunori
authors.initials: K
authors.lastname: Ikeda
authors.forename: Takeshi
authors.initials: T
authors.lastname: Bamba
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Hirata
mesh_terms: D001559:Benzhydryl Compounds; D001673:Biodegradation, Environmental; D052244:Endocrine Disruptors / Q000302:isolation & purification / Q000493:pharmacokinetics*; D019684:Magnoliopsida / Q000378:metabolism*; D010636:Phenols / Q000302:isolation & purification / Q000493:pharmacokinetics*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000493:pharmacokinetics*; D018508:Water Purification / Q000379:methods*; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D052244:Endocrine Disruptors; D010636:Phenols; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds