BCP was obtained through the following steps: (1) Broken
pieces of BC were dehydrated in a furnace at a temperature of
103 ± 2 C; (2) these dehydrated broken BC were loaded into a
cross beater mill (Retsch SK100), and they were pulverized for a
certain period; and (3) the BCP with a size of 90, 63, or 38 lm
was obtained by sieving the pulverized BC in an analytical sieve
shaker (Retsch AS200).