Membrane spectrum material for eliminating micro pollutant in water body and preparation method of membrane spectrum material
A membrane chromatography and pollutant technology, applied in water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of low surface energy, strong hydrophobicity, unfavorable high-efficiency filtration of water bodies, etc., and achieve low-cost and high-efficiency removal. Effects of impurities and harmful micro-pollutants, huge application prospects
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[0018] A method for preparing a membrane chromatographic material for removal of micro-pollutants in a water body, comprising the steps of:
[0019] (1) Mix the bulk membrane material, adsorptive substance, porogen and solvent in a certain mass ratio, and mechanically stir at 30-100°C until completely dissolved to form a solution; the mass ratio of each component is as follows: the bulk membrane material is 10-40%; Adsorptive substance 0.5-5%; Porogen 0-5%; Solvent 50-89.5%;
[0020] (2) further defoaming, filtering, and standing the obtained solution at 30-100° C. to obtain a polymer casting solution;
[0021] (3) The casting solution is coated or extruded by a film forming machine, immersed in a coagulation bath to solidify and form a polymer film, washed in deionized water, and dried to obtain a membrane chromatography material.
[0022]The bulk membrane material is any one of polyvinyl chloride, polyvinylidene fluoride, polyacrylonitrile, polysulfone, and polyethersulfone...
Embodiment 1
[0030] Mix polyvinyl chloride, bentonite, polyethylene glycol and N,N-dimethylacetamide according to the concentration requirements of the corresponding numbers in Table 1.1, stir mechanically for 2 hours, fully dissolve, defoam and filter to obtain a cast film solution, let stand for 30min. Extrude the casting solution through a film forming machine, immerse it into a coagulation bath to solidify and form it, wash it with water at 25°C to obtain a sheet-like membrane chromatography material, further wash it fully with deionized water, and then let it dry in the air to obtain a pore size of 10μm membrane chromatography material. Test its water flux, BSA rejection rate. Tested against 100mg / L Pb 2+ The adsorption rate of the standard solution and the adsorption rate of the micropollutant bisphenol A (BPA).
[0031] Table 1.1: Preparation conditions of polyvinyl chloride / bentonite membrane chromatography materials
[0032]
[0033] Table 1.2: Performance data of polyvinyl...
Embodiment 2
[0036] Mix polyvinylidene fluoride, kaolin, polyvinylpyrrolidone and N,N-dimethylformamide according to the concentration requirements of the corresponding numbers in Table 2.1, stir mechanically for 2 hours, fully dissolve, defoam and filter to obtain cast film solution, let stand for 30min. Extrude the casting solution through a film forming machine, immerse it in a coagulation bath to solidify and form it, wash it with water at 25°C to obtain a hollow fiber-shaped membrane chromatography material, further wash it fully with deionized water, and then let it stand in the air to dry to obtain Membrane chromatography material with a pore size of 5 μm. Test its water flux, BSA rejection rate. Tested against 100mg / L Cd 2+ The adsorption rate of the standard solution and the adsorption rate of salbutamol.
[0037] Table 2.1: Preparation conditions of polyvinylidene fluoride / kaolin membrane chromatography materials
[0038]
[0039] Table 2.2: Performance data of polyvinylid...
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