Table 5.

Effect of initial pH on the residual concentrations of estrogens in cow manure by the Fenton oxidation process. Note: the Fe(II) to H₂O₂ molar ratio was 0.10 M/M; the H₂O₂ dosage was 2.56 mmol/g; the solid to water mass ratio was 2 g/mL; the reaction time was 24 h.

Initial pH Value	The Residual Concentrations of Estrogens in Cow Manure (mg/kg)
	E3	BPA	DES	E2	EE2
3.0	15.57 ± 0.69	0.23 ± 0.09	0.62 ± 0.18	1.21 ± 0.72	11.51 ± 0.65
5.0	26.95 ± 0.90	0.54 ± 0.15	3.28 ± 0.51	1.72 ± 0.14	14.40 ± 1.14
7.0	38.56 ± 5.56	0.95 ± 0.11	4.69 ± 0.55	4.30 ± 0.15	15.71 ± 0.84
9.0	51.88 ± 7.22	1.22 ± 0.08	6.86 ± 0.22	6.65 ± 0.65	19.56 ± 0.57
11.0	61.74 ± 1.18	1.42 ± 0.04	8.78 ± 0.13	9.45 ± 0.30	22.90 ± 2.37