Preparation method of mesoporous potamogeton pectinatus adsorption material for heavy metal ions

Abstract

The invention relates to a preparation method of a mesoporous potamogeton pectinatus adsorption material for heavy metal ions, and belongs to the field of adsorption material preparation. According to the invention, Potamogeton pectinatus stems are taken as raw materials, and soaked in water to enable deionized water enter into inner pores of the stems, and quickly frozen by liquid nitrogen to enable water in the pores of the stems frozen, inner apertures of the stems are widened to increase porosities by using an ice splitting effect, namely the principle that water freezes to increase volume, then adsorption sites of the stems are treated by methanol to be fully exposed, the number of active groups on the surfaces of the stems and in the inner pores is further increased through composite fermentation modification of hydroxycitric acid in a garcinia cambogia extracting solution and microorganisms in biogas liquid to increase the adsorption rate of the stems, finally freeze drying is carried out to obtain the adsorption material. The method disclosed by the invention not only changes surface properties of the potamogeton pectinatus stems, but also changes the internal structures of the stems to improve adsorption properties of the stems so as to facilitate more thorough adsorption, thus the adsorption material can be thoroughly utilized, and the utilization rate of the adsorption material is increased.

Description

technical field [0001] The invention relates to a preparation method of a mesoporous longan longan japonica heavy metal ion adsorption material, which belongs to the field of adsorption material preparation. Background technique [0002] Asparagus longan, also called linear eye vegetable, is a perennial submerged herb that is widely distributed all over the world and has good environmental adaptability. It can be used as feed for fish and ducks, and can also be used as medicine. It has the effect of clearing away heat and detoxifying. The good bioaccumulation of heavy metals in the water body by Longan zilong has attracted the attention of scholars at home and abroad, and the adsorption characteristics of longan zi ion adsorption potential, but its adsorption performance needs to be improved. Asparagus is rich in fiber and protein components, and the main functional groups in these components that can be combined with metal ions are carboxyl, phosphoryl, hydroxyl, sulfate, ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: most of the common modification methods for natural adsorption materials are hydrothermal modification, chemical modification and physical modification methods, but these methods can only change the surface properties of substances and improve the adsorption effect , but the internal structure of the substance cannot be changed, resulting in the waste of adsorption materials, low utilization rate, and the disadvantages that the adsorption performance cannot be improved as a whole. A preparation method for the adsorption material of heavy metal ions of mesoporous asparagus is provided. The stems of the mustard vegetable are used as raw materials, soaked in water so that deionized water enters the internal pores of the stems, and then quick-frozen with liquid nitrogen to freeze the water in the pores of the stems, and use the "ice splitting effect" to increase the volume of frozen water The principle is to widen the pore size inside the stem to increase the porosity, and then treat with methanol to fully expose the adsorption sites of the stem, and then modify it through the compound fermentation of hydroxycitric acid in the extract of Garcinia cambogia and microorganisms in the biogas liquid , further increasing the number of active groups on the surface of the stem and in the internal pores, improving the adsorption rate of the stem, and finally obtaining the adsorption material after freeze-drying