为研究芬顿氧化堆制技术对畜禽粪便中雌激素的去除作用,本文以牛粪为研究对象,采用开放式堆肥方式,测定了牛粪堆肥0,3,12,24,48,96,192,384和768h时雌三醇(E3)、17β-雌二醇(17β-E2)、双酚A(BPA)和炔雌醇(EE2)4种雌激素的含量,分析了芬顿试剂和柠檬酸对芬顿氧化堆制过程中雌激素去除的影响.结果表明,加入Fenton氧化试剂和柠檬酸3h后,牛粪中E3、17β-E2、BPA和EE2残留率分别为15.10%、2.65%、9.90%和11.44%显著低于未加氧化试剂处理组,芬顿氧化堆制处理32d后除EE2外,其他3种雌激素的残留量均低于检出限,EE2的残留率仅为2%.进一步地通过种子发芽率分析了氧化堆制后牛粪对种子的影响.结果发现,上海青(Brassica chinensis)的种子发芽指数> 50%,说明芬顿氧化堆制后的堆料对蔬菜种子基本无表观毒害作用.因此,芬顿氧化堆制技术可以高效去除畜禽粪便中雌激素,实现畜禽粪便资源化与无害化利用.
Abstract
To investigate the effect of the Fenton-oxidized composting process on the removal of estrogens in manure, this study determined the concentrations of four estrogens—estradiol (E3), 17β-estradiol (17β-E2), bisphenol A (BPA), and ethinylestradiol (EE2)—in cow manure at various time points (0, 3, 12, 24, 48, 96, 192, 384, and 768hours) using the Fenton-oxidized composting process. The influence of Fenton's reagent and citric acid on estrogen removal during Fenton oxidation were also examined. Results demonstrated that after 3hours of treatment with Fenton's reagent and citric acid, the residual rates of E3, 17β-E2, BPA, and EE2in cow dung were 15.10%, 2.65%, 9.90%, and 11.44%, respectively, which were significantly lower than those observed in the non-oxidizing reagent treatment group. Following 32days of composting, the residual concentrations of E3, 17β-E2, and BPA fell below detectable limits, while the residual rate of EE2was only 2%. Additionally, seed germination rate analysis during the oxidized composting process revealed that the seed germination index of Brassica chinensis exceeded 50%, indicating that the composting products exhibited no apparent toxic effects on vegetable seeds. Consequently, the Fenton-oxidized composting technology can effectively accelerate the removal of estrogens from livestock manure, thereby facilitating its resourceful and harmless utilization.
关键词
雌激素 /
堆制工艺 /
芬顿氧化试剂 /
牛粪 /
去除 /
种子发芽率
Key words
composting process /
cow manure /
estrogens /
Fenton oxidized reagent /
removal /
seed germination rate
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基金
国家自然科学基金资助项目(42177016,42377011);中央高校基本科研业务费资助专项(KJYQ2025038);江苏省重点研发计划项目(BE2022849)