In this review we study spinal ferrite magnetic nanoparticle for the effective removal of harmful contaminates from the waste water. It is well known that synthesis methods strongly effect the crystalline and the magnetic properties of the synthesized materials. In order to improve the magnetic properties various method of synthesis along with their effective applications have been discussed and published in various scientific journal. Main contaminants of water are classified broadly in two categories that are organic and inorganic. Here in pollutants are classified and probable removal methods are explained throughout this content using magnetic separation methods. The effective spinel ferrites consisted with lower hysteresis loop and lower coercivity, which is beneficiary for the removal of the pollutant from waste water.
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