摘要：Magnetite was set in the channel of an open system to form the assembled-magnetite membrane controllable by magnet. The starch-granule-dispersed solution (5-50 μm) was flown from the top of the channel to filter starch granule by formed assembled-magnetite membrane. The amount of magnetite was set at 0.1 gram. The length between magnet and magnetite was changed from 0 cm to 3.5 cm to alter the macro-structure of magnetite. It was found that the amount of filtered starch granule was dependent on the length between magnet and magnetite. Detaching the magnet from the magnetite collapsed the macro-structure of magnetite, resulting in the efficient recovery of starch granule by flowing pure water.
