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Journal of Zhejiang University (Agriculture and Life Sciences)  2017, Vol. 43 Issue (6): 734-746    DOI: 10.3785/j.issn.1008-9209.2017.06.122
Review     
Environmental exposure of steroid estrogens and their migration and transformation behavior
TONG Xin1,HU Boyang1,CHEN Xingcai1,ZHANG Xuelian2,ZHAO Yongzhi2,GU Chenggang3,LI Yanxia1*
(1. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; 2. Beijing Soil and Fertilizer Extension Service Station, Beijing 100029, China; 3. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China)
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Abstract  

Steroid estrogens are a group of biologically active compounds synthesized from cholesterol and have a cyclopentan-o-perhydrophenanthrene ring in common. Steroid estrogens can be classified into natural and synthetic types, and have been intensively reported for wide distribution in water bodies and farmland soils. Trace steroid estrogens in the environment can pose severe threat to the ecosystems. For example, these steroid estrogens can promote synthesis and secretion of vitellogenin in male fish, and this female-specific protein can lead to feminization of the male fish population and result in extinction of fish species. Recently, steroid estrogens have been frequently detected in surface waters, such as lakes and rivers, but little attention was paid to steroid estrogen accumulation in soils, and the potential steroid estrogen pollution caused by application of manure in greenhouse vegetable farmland. In addition to the sewage treatment plant effluent outfalls, large amounts of animal wastes and biosolids applied to agricultural fields might run off into nearby water bodies or infiltrate through the soil into groundwater. Cattle and poultry manure has been reported as a source of the environmental loadings of steroid estrogens. In this paper, the migration and transformation process of steroid estrogens was reviewed, and the environmental behavior including adsorption, degradation and associated influence factors was discussed. The distribution and partitioning of steroid estrogens in the environment were determined by their physicochemical properties and site-specific environmental conditions. Due to low solubility in water, the persistence and bioavailability of hydrophobic steroid hormones in the aquatic systems depend greatly on their sorption to particulate matter. The adsorption behavior of steroid estrogens in environmental media is influenced not only by their physical and chemical properties, but also by soil type, environmental pH, and types and contents of organic matters. Furthermore, degradation of steroid hormones in the environment includes photodegradation, chemical degradation, and microbial degradation, and the degradation process can greatly reduce the concentration of steroid estrogens, but is affected by multiple factors. Finally, the research trends of steroid estrogens were suggested as follows: 1) to explore the pattern of environmental behaviors of manure- borne- steroid estrogens in the farmland soil, especially in the greenhouse soil; 2) to investigate research in the field, especially under multi- interface conditions, which make more sense than experimental simulations in the lab; 3) to discover the environmental behaviors of steroid estrogens coexisting with other pollutants.



Key wordssteroid estrogens      water body      soil      environmental appearance      migration and transformation     
Received: 12 June 2017      Published: 30 August 2017
CLC:  X 50  
Corresponding Authors: liyxbnu@bnu.edu.cn     E-mail: liyxbnu@bnu.edu.cn
Cite this article:

TONG Xin,HU Boyang,CHEN Xingcai,ZHANG Xuelian,ZHAO Yongzhi,GU Chenggang,LI Yanxia. Environmental exposure of steroid estrogens and their migration and transformation behavior. Journal of Zhejiang University (Agriculture and Life Sciences), 2017, 43(6): 734-746.

URL:

http://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2017.06.122     OR     http://www.zjujournals.com/agr/Y2017/V43/I6/734


类固醇雌激素的环境暴露及其迁移转化

类固醇雌激素是一类内分泌干扰物,可分为天然雌激素和人工合成雌激素,在环境中分布广泛,虽然含量较低,但是危害巨大,具有干扰动物和人体的内分泌系统以及影响生殖、发育等特征。本文围绕环境中几种主要的类固醇雌激素,介绍了它们的结构性质、危害及其主要来源,指出其在地表水体、农田土壤中的暴露水平。目前,关于类固醇雌激素的环境暴露研究多集中于河流、湖泊等地表水体,有关该激素在土壤中的残留报道较少,而设施菜地由于大量施用粪肥将极可能产生雌激素污染问题。本文对雌激素进入环境后的迁移转化规律及影响因素进行了综述,描述了雌激素吸附与降解等环境行为及其影响因素。目前针对雌激素的大多数研究仍基于室内模拟实验,对于其在实际环境中的迁移转化过程及与其他污染物共同作用的规律尚不清楚。因此,对今后的研究方向提出以下几点建议:1)研究随畜禽粪便进入农田土壤特别是设施菜地的雌激素及其环境行为规律;2)除室内模拟实验外,对实际环境系统中的雌激素研究更具价值,特别是在环境多相态体系中的迁移转化等过程;3)研究与多种类污染物共存下雌激素的环境行为规律。


关键词: 迁移转化,  类固醇雌激素,  环境暴露,  土壤,  水体 
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