2.2. Preparation of NZVI/AC and non-supported NZVI
The commercial activated carbon was soaked in 5% hydrochloric
acid for 24 h, followed by washing with deionized water until
the water pH was stable (pH = 6.52–6.70). After drying for 24 h
at 105 C, AC was used as a supporter for n-ZVI particles.
Nanoscale zero-valent iron can be synthesized by liquid-phase
reduction according to reference [17] by the following reaction: