Magnetic composite matrix particle as well as preparation method and application thereof

The invention discloses a magnetic composite matrix particle as well as a preparation method and application thereof. The magnetic composite matrix particles are prepared from the following components in percentage by mass: 20-30% of Fe3O4 powder, 40-50% of charcoal powder, 20% of coconut fiber powder and 10% of an adhesive. The magnetic composite matrix particles prepared by the method are used for preparing an ecological floating island to purify a water body, the raw materials adopt bottom mud generated by dredging bottom mud in urban lakes and river channels and coconut shell fibers as main components of the matrix, and the ecological environment of the water body is not damaged in application; bottom mud generated by dredging bottom mud in urban lakes and river channels is recycled, waste is used for treating waste, and the raw material cost is saved; meanwhile, the magnetic material is easy to separate and recycle. 本发明公开了一种磁性复合基质颗粒及其制备方法和应用。所述磁性复合基质颗粒由包括如下质量百分比的组分制备得到：20～30％Fe3O4粉末、40～50％生物炭粉末、20％椰壳纤维粉末