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首页> 外文期刊>Journal of environmental science and health >Environmental transport of endogenous dairy manure estrogens
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Environmental transport of endogenous dairy manure estrogens

机译：内源性乳肥料雌激素的环境运输

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摘要

Although estrogens originating from dairy manure applied to agricultural soils as a fertilizer can potentially contaminate surface water and groundwater, the variables that control transport are poorly understood. Our objective was to assess the potential for off-site movement of endogenous dairy cattle estrogens when manure is applied on fields at agronomically relevant fertilization rates. Estrone (E1), 17a-estradiol (a-E2), and 17β-estradiol (β-E2) were used in laboratory sorption, desorption, and transformation incubations with both manure and an agriculturally relevant soil. Sorption on manure containing 44% organic carbon exceeded sorption on soil containing 0.8% organic carbon by 20 to 150 times, following the pattern of β-E2 > a-E2 > El. Approximately 20% of E1 and 17% of a-E2 were desorbed from manure, whereas only about 4% of β-E2 was desorbed. Thirty to seventy percent of a-E2 and β-E2 were converted to E1 in soil and manure, making it imperative that transformation reactions be considered when predicting transport and potential biological effects in the environment. Overall results indicate that high organic carbon concentrations and relatively low amounts of desorption inhibit the potential for off-site transport of endogenous dairy manure estrogens.
机译：尽管源自乳牛粪肥的雌激素作为肥料施用到农业土壤中可能会污染地表水和地下水，但控制运输的变量知之甚少。我们的目标是评估在以农艺学相关的施肥速度将肥料施用到田地上时内生奶牛雌激素异位运动的可能性。雌酮（E1），17a-雌二醇（a-E2）和17β-雌二醇（β-E2）用于粪便和农业相关土壤的实验室吸附，解吸和转化温育。遵循β-E2> a-E2> El的模式，在含44％有机碳的粪肥上的吸附量比在含0.8％有机碳的土壤上的吸附量高20到150倍。从粪便中解吸出大约20％的E1和17％的a-E2，而只有大约4％的β-E2被解吸。 30％至70％的a-E2和β-E2在土壤和肥料中转化为E1，因此在预测环境中的运输和潜在生物效应时必须考虑转化反应。总体结果表明，较高的有机碳浓度和相对较低的脱附量抑制了内源性乳牛粪雌激素异位转运的可能性。

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