Use of polymer composition in removing heavy metal ions of fruit and vegetable juice

Abstract

The invention discloses a use of polymer composition in removing heavy metal ions of fruit and vegetable juice. The polymer composition is a compound comprising functional groups capable of providing lone pair electrons in the structure loaded on a polymer carrier; the compound and the heavy metal ions can be formed into coordination bonds, thereby being capable of efficiently, quickly and conveniently removing heavy metal ions of fruit and vegetable juice. The method is simple and easy to use and quick in effect without the defects of the methods normally used such as adsorptive process method, ion-exchange processing method and chelating resin method, and has very strong specificity for absorbing various heavy metal irons but basically not absorbing the active ingredients in fruit and vegetable juice; the content of the heavy metal irons in fruit and vegetable juice after treatment in the method is obviously reduced; the method can reach Sanitation Standard of Fruit and Vegetable Juice Beverage (GB19297-2003), and protects the environment and has industrialized prospect.

Description

technical field [0001] The invention relates to the application of a polymer compound in removing heavy metal ions, in particular to the application of a polymer compound in removing heavy metal ions in fruit and vegetable juices. Background technique [0002] In the past 30 years, with the rapid development of my country's economy, the problem of environmental pollution has become increasingly serious, especially the residue of heavy metals is one of the most serious forms of pollution in our country. Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds, mainly due to human factors such as mining, exhaust emissions, sewage irrigation, and the use of heavy metal products. After heavy metals pollute soil, air and water, they will enter the food chain and eventually enter the human body. And because of the biomagnification effect, during the progress of the food chain from low-level to high-level, harmful substances such as heavy m...

AI Technical Summary

Problems solved by technology

[0006] The adsorption method is easy to adsorb the beneficial nutrients in fruit juice and vegetable juice, but it is difficult to adsorb heavy metal ions, so the application of the adsorption method is greatly limited.

At the same time, it is easy to cause secondary pollution, and the regeneration cycle of the adsorbent is not easy to realize

[0007] The ion exchangers used in the ion exchange treatment generally show a certain acidity and alkalinity, which has a certain destructive effect on the beneficial nutrients in fruit juices and vegetable juices; at the same time, the charges carried by the ion exchangers themselves may also affect the juice It will affect the nutrients in the vegetable juice, and it is easy to cause the fruit juice and vegetable juice to be cloudy

This limits the application of ion exchange in the removal of heavy metal ions from fruit and vegetable juices

[0008] The selectivity of the chelating resin method is single, because the lead, cadmium, mercury and copper elements in fruit juice and vegetable juice generally exist in the form of cations, but arsenic can exist in the form of cations and anions. The relatively complex existence of heavy metals makes it necessary to use a variety of chelating resins in combination, which not only increases the cost and prolongs the operation time, but also makes it difficult to realize the regeneration cycle of the chelating resin. At the same time, the chelating resin may have low mechanical properties. , poor thermal stability and other disadvantages

[0009] The research on the removal of heavy metal ions by biochemical methods has just started, the theory of this method is not yet mature, the composition of cell components involved in metal complexation and the biosynthesis process are still unclear, and the kinetics of heavy metal elements being adsorbed or complexed is lacking. data, and cannot carry out process design and scale-up and economic balance, etc.

Therefore, there is no industrialized example of this technology in removing heavy metals from fruit and vegetable juices