2.2. Preparation of kaolin sample
Kaolin samples were prepared for evaluation using a Jar Test
(Bratby, 2006). The slurry was mixed at 1200 rpm for 10 min and
sampled during stirring to ensure homogeneity. The pH of the
slurry was measured, and suspended solids (SS) and turbidity (TU)
measurements were taken. All the measurements of SS and TU in
this study were conducted with colorimeter (DR/890, HACH, USA)
according to Standard Methods 8006 and 8237 respectively
(USEPA, 2012). The characteristics of the kaolin slurry are listed in
Supplementary Table S1.