Investigation of Magnetic Modified Clay Nano-adsorbents in Removing Micro-pollution from potable water
2016
Natural clay nano-materials are relatively ideal adsorbents for its huge specific surface area and abundant pore structure, wide resources and low price.However, it is easy to form the suspension system after adsorption, which is difficult to separate and recycle.To surmount these deficiencies, new magnetic clay-based adsorbents are synthesized and investigated.By using single factor experiment, found out the impact of its adsorbing micro pollutants in drinking water.The mechanism of adsorption has also been studied.In this paper, we chose Cr and As as the target micro pollutant, while halloysite and sepiolite adsorbents are chosen to be magnetized.Magnetic modified carbonization halloysite nanocomposite (Fe 3 O 4 /HNT@C) and iron oxides@sepiolite nanocomposites (Fe 2 O 3 /SEP and γ-Fe 2 O 3 /SEP@C) exhibited selective and high efficient adsorption ability for Cr(IV) and As(III).Meanwhile, they have enough magnetic intensity to be recycled by using the external magnetic field.In addition, the adsorption is strongly dependent upon solution pH value.