Fate of estrone in laboratory-scale constructed wetlands

被引:22
作者
Hakk, Heldur [1 ]
Sikora, Lawrence [2 ]
Casey, Francis X. M. [3 ]
机构
[1] USDA, Red River Valley Agr Res Ctr, Fargo, ND 58102 USA
[2] Compost Utilizat & Syst, China Village, ME 04926 USA
[3] North Dakota State Univ, Sch Nat Resource Sci, Dept Soil Sci, Fargo, ND 58108 USA
关键词
Constructed wetland; Estrone; Estrogen; Fate and transport; Horizontal surface flow wetland; Vertical subsurface flow wetland; PERSONAL CARE PRODUCTS; WASTE-WATER TREATMENTS; ESTROGENIC HORMONES; SWINE WASTE; REMOVAL; 17-BETA-ESTRADIOL; SEDIMENTS; SYSTEM; BIODEGRADATION; ATTENUATION;
D O I
10.1016/j.ecoleng.2017.11.005
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
A horizontal, subsurface, laboratory-scale constructed wetland (CW) consisting of four cells in series was used to determine the attenuation of the steroid hormone estrone (E1) present in animal wastewater. Liquid swine manure diluted 1: 80 with farm pond water and dosed with [C-14] E1 flowed through the series of cells containing floating vegetation (duckweed, family Lemnaceae) and a sand: gravel sediment layer. The aqueous layer within each cell was sampled across time, and at 168 h duckweed and sediment were sampled for E1 and/ or its metabolites. Control and Blank systems consisted of single cells with no vegetation or no vegetation/ sediment, respectively. Only 5% of the dose was detected in the effluent at 168 h. With the use of mass spectrometry and thin layer chromatography, it was determined that E1 was metabolized into estriol (E3) and to polar metabolites. The largest compartment for [C-14] was duckweed (42.1% of administered dose) at 168 h followed by sediment (17.3%) and the liquid layer (15.1% of the dose). Most of the vegetative removal of E1 occurred in the first cell, and thereafter, sediment: liquid layer interactions governed E1 movement suggesting particle-bound transport on either colloids or dissolved organic matter. Horizontal, subsurface flow CW were able to remove approximately 95% of the influent E1, and demonstrated the importance of vegetative matter in removal of this potent steroid hormone.
引用
收藏
页码:60 / 68
页数:9
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