Application of Novel Amino-Functionalized NZVI@SiO₂ Nanoparticles to Enhance Anaerobic Granular Sludge Removal of 2,4,6-Trichlorophenol

Table 1

The effect of Fe²⁺ on methanogenic activity of NZVI@SiO₂-NH₂/anaerobic granule sludge system.

Fe^2+ dosage; (mg/L)	Maximum gas output; (mL/h)	Specific methanogenic activity; (mL/g VSS d)	Relative activity
0	15.8 ± 0.62	48.72 ± 2.20	—
50	13.3 ± 0.75	45.67 ± 0.67	93.74%
100	10.5 ± 1.05	42.59 ± 2.25	87.42%
200	9.7 ± 0.43	37.56 ± 0.93	77.09%