Table 4.

Effect of the solid to water mass ratio 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 initial pH values was 3.0; the reaction time was 24 h.

Solid to Water Mass Ratio/(g/mL)	The Residual Concentrations of Estrogens in Cow Manure (mg/kg)
	E3	BPA	DES	E2	EE2
2	19.56 ± 5.16	0.38 ± 0.11	0.54 ± 0.07	0.81 ± 0.14	11.12 ± 1.13
1	46.08 ± 2.09	0.77 ± 0.17	1.44 ± 0.19	2.85 ± 0.34	17.68 ± 0.90
0.5	61.28 ± 1.17	1.26 ± 0.08	2.47 ± 0.13	3.34 ± 0.59	20.47 ± 1.04
0.33	65.66 ± 4.28	2.05 ± 0.14	3.58 ± 0.11	4.54 ± 0.38	41.84 ± 4.78