首页|雄激素与糖皮质激素在沉积物中的协同与竞争吸附研究

雄激素与糖皮质激素在沉积物中的协同与竞争吸附研究

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雄激素与糖皮质激素在环境中广泛存在,对人体和生态健康造成风险,然而人们对它们在沉积物中的吸附行为仍知之甚少。该文研究2种雄激素和2种糖皮质激素在沉积物中单独和两两共存时的吸附规律。结果表明:4种激素的吸附更符合准二级动力学,初始浓度升高可使平衡吸附量增加、除DEX外吸附速率常数变小。吸附等温线更符合Langmuir模型,雄激素的吸附容量比糖皮质激素小,最小为雄烯二酮70。04 mg/kg,最大为可的松322。3 mg/kg。在双吸附质体系中,雄烯二酮分别与甲睾酮、地塞米松共存时表现为协同效应,地塞米松分别与可的松、甲睾酮共存时表现为竞争吸附。该研究有助于完善对类固醇激素环境行为的认知,为准确评估其生态风险提供理论依据。
Synergistic and Competitive Sorption of Androgens and Glucocorticoids in Freshwater Sediment
Androgens and glucocorticoids are prevalent in the environment,posing significant risks to human and ecological health.However,their sorption behaviors in sediments remain poorly understood.This study investigated the sorption characteristics of two androgens and two glucocorticoids,both individually and in binary mixtures,in fresh-water sediment.The results showed that the sorption of these four steroids aligned more closely with pseudo-second-order kinetics.Higher initial concentrations resulted in larger equilibrium sorption capacities and smaller sorption rate constants except DEX.The sorption isotherms were better described by the Langmuir model,with androgens exhibiting smaller adsorption capacities compared to glucocorticoids,ranging from a minimum of 70.04 mg/kg for androstenedi-one to a maximum of 322.3 mg/kg for cortisone.In binary adsorbate systems,the coexistence of androstenedione and methyltestosterone exhibited synergistic sorption,as did the coexistence of androstenedione and dexamethasone.Dexamethasone competed with either cortisone or methyltestosterone when they coexisted.This study enhances the understanding of the environmental fate of steroid hormone and provides theoretical support for accurately assessing their ecological risks.

endocrine disrupting chemicalssedimentsynergistic sorptioncompetitive sorption

郭钧尧、刘雪茹、占绮红、邹晔锋、邹华、张云

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广西大学轻工与食品工程学院,广西清洁化制浆造纸与污染控制重点实验室,广西 南宁 530004

浙江大学环境科学系,浙江 杭州 310058

江南大学环境与生态学院,江苏 无锡 200433

内分泌干扰物 沉积物 协同吸附 竞争吸附

国家自然科学基金国家自然科学基金中国博士后科学基金项目

41807489422773642021M691273

2024

环境科学与技术
湖北省环境科学研究院

环境科学与技术

CSTPCD北大核心
影响因子:0.943
ISSN:1003-6504
年,卷(期):2024.47(9)