A particle size analyzer (Mastersizer 2000, Malvern, UK) with a small angle static light scattering (SASLS) was used to monitor the dynamics of oxides growth during chlorination and the structure of aggregates. During chlorination, the suspension was pumped to the SASLS by a peristaltic pump (EW-7553-70, Cole-Parmer Instrument Co., USA) with a Tygon tubing (Masterflex-06409-16, Cole-Parmer Instrument Co., USA) of I.D. 3.1 mm, and the sample was recycled back to the mixing vessel at a flow rate of 20 mL/min. The size of oxides formed at a constant mixing intensity was continuously measured for 30 min by use of the particle size analyzer, and fractal dimensions of those oxides were determined by SALLS [15].