Method for preparing porous alginate gel microsphere adsorbing agent with electronic injection method

Abstract

The invention discloses a method for preparing a porous alginate gel microsphere adsorbing agent with an electronic injection method. The method for preparing the porous alginate gel microsphere adsorbing agent with the electronic injection method comprises steps as follows: an aqueous sodium alginate solution is prepared, then a pore-forming agent is added, and the mixture is uniformly stirred to obtain blended sol; the blended sol is put in an electrostatic spinning device, electrostatic spinning process parameters are set, the blended sol is electronically injected into a calcium chloride solution containing acid, and the mixture is stirred and filtered to obtain porous alginate gel microspheres; and the porous alginate gel microspheres are soaked in a metal salt solution, are stirred and react at the room temperature, and then are filtered and dried so as to obtain the porous alginate gel microsphere adsorbing agent. According to the invention, the simple and high-efficiency electronic injection technology is adopted to prepare the porous alginate gel microsphere adsorbing agent, and the adsorbing agent has a good adsorption property for part of anions, especially fluorine ions, and can be widely used for anion separation and wastewater treatment; and the adsorbing agent can be degraded after used, avoids secondary pollution and has important significance for environmental protection.

Description

technical field [0001] The invention relates to a method for preparing a porous alginate gel microsphere adsorbent by an electrospray method, and belongs to the fields of utilization of biomass resources, preparation and application of adsorbents. Background technique [0002] Fluorine is widely distributed in the natural environment and is one of the trace elements closely related to our human health, mainly in the form of fluoride ions. Every tissue of the human body contains different amounts of fluorine. The fluorine content of teeth and bones accounts for more than 80% of the human body, which is an important factor in the composition of teeth and bones. The fluorine content of a normal human body is about 2-3g. The presence of a small amount of fluorine in the human body can prevent dental caries and inhibit bacterial corrosion of teeth. When the fluorine content in drinking water reaches 0.5-1.0mg / L, it is beneficial to human health, and neither dental caries nor dent...

AI Technical Summary

Problems solved by technology

Among the above methods, both the reverse osmosis method and the dialysis method require the use of treatment membranes, which require large investment and high operating costs.

The biggest shortcoming of the coagulation method is that there is a phenomenon of electrode passivation when removing fluorine ions, which leads to the poor effect of removing fluorine, serious fouling of the plate after use, and very difficult removal of dirt.

Drinking water often contains SO 4 2- , NO 3 - isoanions, the result of competitive adsorption makes anion exchange resins less effective

Compared with several other methods, the adsorption method is a relatively economical and efficient method for removing fluorine, which can effectively deal with heavy metals, non-metal ions and organic pollution, but most adsorbents have low adsorption capacity, high cost, Problems such as low efficiency and secondary pollution affect practical application

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