基于畜禽粪便的有机肥中雌激素污染特征.

Understanding estrogen contamination characteristics of organic fertilizers derived from livestock manures is important for organic fertilizer production and contamination control. In the present study, 17 organic fertilizers derived from chicken, swine, and cow manures were collected from a market. Organic matter, nitrogen, phosphorus, and potassium contents of organic fertilizers were determined. The concentration of estriol（E3）, 17β-estradiol（17β-E2）, bisphenol A（BPA）, and ethinyl estradiol（EE2）were detected by SPE-HPLC/FLD. At the same time, we compared the estrogen concentrations in organic fertilizers with fresh livestock manures. Results showed that organic fertilizers with low organic matter were detected in the organic fertilizer samples derived from chicken, swine, and cow manures. The average value（dry weight）of E3, 17β-E2, and BPA in organic fertilizers derived from chicken manures were 270.22, 2.71 μg·kg-1, and 87.93 μg· kg-1, respectively. The average values of E3, 17β-E2, BPA, and EE2 in organic fertilizers derived from swine manures were 609.71, 41.84, 32.69 μg·kg-1, and 46.74 μg·kg-1, respectively. The average value of E3 in organic fertilizers derived from cow manures was 50.96 μg· kg-1. Organic fertilizers had a large risk of estrogen contamination, and the risk of E3 contamination was higher than that of the other estro⁃ gens. Additionally, the concentration and detection rates of estrogen in cow organic fertilizers were lower and safer. The detection rates of E3, 17β-E2, BPA, and EE2 in organic fertilizers were 47.06%, 11.76%, 17.65%, and 5.88%, respectively, while detection rates were 67.74%, 70.97%, 70.97%, and 58.06% in fresh livestock manures, respectively. The detection rates of estrogen in organic fertilizers were lower than that of fresh livestock manures. The conclusion is that there are estrogen residues in organic fertilizers derived from livestock manures, which needs further attention. [ABSTRACT FROM AUTHOR]