Using Fenton Oxidation to Simultaneously Remove Different Estrogens from Cow Manure.

Area of Science:

• Environmental Chemistry
• Environmental Science
• Wastewater Treatment

Background:

• Estrogens in livestock excrement pose risks to animal health and the food cycle.
• Concerns exist regarding the environmental impact of persistent estrogenic compounds.

Purpose of the Study:

• To investigate the simultaneous removal of key estrogens from cow manure using Fenton oxidation.
• To optimize Fenton oxidation conditions for efficient estrogen degradation.

Main Methods:

• Fenton oxidation technique applied to cow manure.
• Optimization of reaction parameters including H₂O₂ dosage, Fe(II)/H₂O₂ ratio, solid-to-water ratio, pH, and reaction time.
• Analysis of residual estrogen concentrations (estriol, BPA, DES, estradiol, ethinyl estradiol).

Main Results:

• Optimized conditions achieved high removal efficiencies: 84.9% for E3, 99.5% for BPA, 99.1% for DES, 97.8% for E2, and 84.5% for EE2.
• Identified degradation mechanisms for estrogens via Fenton oxidation.
• Demonstrated effectiveness of Fenton oxidation for simultaneous estrogen removal.

Conclusions:

• Fenton oxidation is an effective technique for removing multiple estrogens from livestock excrement.
• This method supports safe cow manure reuse in agriculture.
• Reduces the threat of environmental estrogens to human health and ecological safety.