A kind of preparation method of magnetic polymer heavy metal ion adsorbent

Abstract

The invention relates to a preparation method of a magnetic polymer heavy metal ion adsorbent. An improved chemical co-precipitation method is used for preparing magnetic nano particles, surface modification is conducted on the magnetic nano particles with gamma-choropropyltrimethoxysilane and polyethyleneimine to obtain polyethyleneimine modified magnetic nano particles, and finally, the polyethyleneimine modified magnetic nano particles and functional monomers are subjected to copolymerization to prepare the magnetic polymer heavy metal ion adsorbent with a multi-level cross-linking structure and multiple adsorption groups; the saturation magnetization is 3.5-15.5 emu / g, remanent flux density and coercive field strength both approach to zero, the paramagnetism and the magnetic responsiveness are provided, for a heavy metal ion aqueous solution with an initial concentration of 100-1000 mg / L, the heavy metal ion adsorption capacity reaches 35-450 mg / g, adsorption equilibrium can be reached in 50-100 min, the heavy metal ion adsorption capacity after 5-time recycling is more than 85% of the first adsorption capacity, and the method can be widely applied in heavy metal ion adsorption and separation, pollution abatement of heavy metal ions and the like.

Description

[0001] 1. Technical field

[0002] The invention relates to a preparation method of a magnetic polymer heavy metal ion adsorbent. The magnetic polymer heavy metal ion adsorbent prepared by the invention is suitable for the adsorption and separation of heavy metal ions, and can be widely used in heavy metal ion adsorption, heavy metal ion separation and purification, and heavy metal ion adsorption. Environmental pollution control, etc.

[0003] 2. Background technology

[0004] With the improvement of global industrialization, environmental pollution is becoming more and more serious. Among them, water pollution has seriously affected people's production and life. Industrial wastewater is the main source of heavy metal pollution in water bodies. Many industrial processes, such as electroplating, tanning, mining, steelmaking, dyeing, etc. , will produce a large amount of wastewater containing heavy metal ions, such as Cd 2+ 、Cu 2+ , Pb 2+ 、Ni 2+ 、As 3+ , Hg 2+ 、Cr 3+ 、Co ...