This innovation was developed to improve biochemical properties of biochar as adsorbent called Magnetic Fluid Biochar (MFB) for removal of heavy metal, microplastics and dyes from wastewater. MFB can absorb more than 83% of all types microplastics, 95% of all heavy metals and 90% of all dyes. The result of water treatment in natural water, found that MFB can absorb contaminants more than 90%, which the pH, TSS, TDS and turbidity had been improved up to Surface Water Quality Standards. Therefore, MFB is a high absorbent of contaminants from wastewater with low price 0.02 $/g/L of wastewater. It is an eco-friendly absorbent due to the best synthesized method. It can be reused up to 22 times and recycled to supercapacitor.