39results about How to "High adsorption removal rate" patented technology

The invention discloses a preparation method of a pulverized fuel ash / oxidized grapheme composite adsorbing material, and belongs to the technical field of environmental protection materials. The preparation method comprises the following special steps: adding a chitosan solution with the mass concentration being 1-5% in pulverized fuel ash according to the ratio of 1 g of pulverized fuel ash to 1 ml of chitosan solution for impregnating for 2-3 h, then drying for 2-3 h at 50-80 DEG C, next adding an oxidized grapheme solution according to the ratio of 1 g of pulverized fuel ash to 10-20 ml of oxidized grapheme with the concentration being 2-5 g / L for impregnating for 8-12 h, stirring for 2-3 h at the same time, adding glutaraldehyde according to the ratio of 1 g of pulverized fuel ash to 0.5-2 ml of glutaraldehyde for crosslinking for 3 h at 50-80 DEG C in the process of adding water to dilute till the solid concentration is 40 g / L, filtering out a liquid phase and washing with absolute ethyl alcohol to be neutral, and performing vacuum drying for 5-6 h at 60 DEG C to obtain the pulverized fuel ash / oxidized grapheme composite adsorbing material. The pulverized fuel ash / oxidized grapheme composite adsorbing material, prepared through the preparation method, overcomes the defect that oxidized grapheme is difficult to separate, and can adsorb anionic-cationic dyes and various pollutants synchronously.

The invention provides a magnetic microsphere capable of adsorbing diclofenac sodium. The magnetic microsphere is prepared by the following steps: preparing nano Fe3O4 by a co-precipitation method, preparing a SiO2 coated magnetic nano particle Fe3O4@SiO2, preparing a chitosan compounded Fe3O4@SiO2 magnetic material, and preparing an ethylene diamine modified magnetic material. According to the preparation method, chitosan and magnetic particles are combined, then the microsphere is modified by ethylene diamine; the magnetic microsphere has more amino groups, the effect of adsorbing and removing diclofenac sodium in water is improved, moreover, the chitosan microsphere has a good magnetic responding performance, so the microsphere can be conveniently separated and recovered, and the magnetic microsphere is a green and sustainable absorbent.

The invention provides a sewage treatment system and method for strengthening fast transfer of organic matters. The system comprises a sludge pretreatment basin, an adsorption-condensation basin, a sedimentation tank and a regeneration tank. The method includes: putting sludge in the sludge pretreatment basin, generating high shear force through fast stirring, and exposing close bond type extracellular polymeric substances with higher aggregation performance in the inner layer of sludge floc; feeding the pretreated sludge into the adsorption-condensation basin, and fully mixing the sludge with sewage under slow agitation to enable the sludge to quickly adsorb organic matters in the sewage and aggregate together again to form sludge floc; feeding mixed liquid containing the sludge floc into the sedimentation tank to stay, enabling supernatant to flow out via a water outlet, feeding part of settled sludge into the regeneration tank via a sludge pump, and discharging the excess sludge to serve as recyclable materials; subjecting the sludge in the regeneration tank to aerobiotic regeneration under the aeration condition, and feeding the sludge into the sludge pretreatment basin through a sludge reflux pump. Compared with the traditional adsorption-regeneration process, the system and method has the advantages that pollutant adsorption and removal rate of the process can be increased by 20-30%, process energy consumption can be lowered by 30-60%, and organic content of the excess sludge is increased by 10-20%.