Scavenging reaction of colloidal silica toward OH radical measured by pulse-radiolysis technique

Kumagai, Yuta   ; Nagaishi, Ryuji ; Yamada, Reiji; Muroya, Yusa*; Katsumura, Yosuke*

Reactions of radical products of water radiolysis in the presence of colloidal silica were studied by time-resolved optical absorption measurement using pulse-radiolysis technique. Consequently scavenging reaction of colloidal silica toward OH radical was observed. Then scavenging capacities of colloidal silica samples of different sizes were measured. The results showed that colloidal silica of smaller size has larger scavenging capacity for unit amount added to solutions.