Method for removing heavy metal ions in fruit and vegetable juice by using chelate resin in cooperative treatment

Abstract

The invention discloses a method for removing heavy metal ions in fruit and vegetable juice by using chelate resin in cooperative treatment. At least two kinds of chelate resin are added into fruit and vegetable juice needing removing heavy metal irons, the chelate resin includes selective arsenic removing resin, selective hydragyrum removing resin or selective cuprum / nickel removing resin. In the method, by utilizing specific chelations of functional groups of modified chelate resins to different heavy metal irons, more than two kinds of special chelate resin for removing certain heavy metal irons are selected and organically combined so as to effectively, fast and conveniently remove heavy metal irons in fruit and vegetable juice. The method is easy and convenient to use, has fast effect, and is especially suitable for removing heavy metal irons in fruit and vegetable juice on site.

Description

technical field [0001] The invention relates to a method for removing heavy metal ions in fruit and vegetable juices, in particular to a method for removing heavy metal ions in fruit and vegetable juices through coordinated treatment with chelating resins. 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 ...

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 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