Modified nano chloroapatite and its preparation method

Abstract

The invention discloses modified nanometer chlorapatite and a preparation method thereof. The modified nanometer chlorapatite consists of nanometer chlorapatite and rhamnolipid, wherein the rhamnolipid is modified on the surface of the nanometer chlorapatite; the mass ratio of the nanometer chlorapatite to the rhamnolipid is (19.9277 to 47):1. The preparation method comprises the following steps of dripping CaCl2 solution into the rhamnolipid solution; performing stirring; dripping Na3PO4 solution into the obtained mixed solution; performing stirring to obtain modified nanometer chlorapatite. The modified nanometer chlorapatite provided by the invention has the advantages that the particle diameter is small; the cost is low; the dispersion performance is good; the stability is high; the environment-friendly effect is achieved; no toxicity and harmlessness are realized, and the like. The bottom mud heavy metal lead can be more efficiently passivated; meanwhile, the water body eutrophication risk brought by application and use of phosphorated materials can be reduced to a certain degree; the application of the chlorapatite material to the practical field restoration is promoted; the modified nanometer chlorapatite is suitable for large-scale use.

Description

Technical field [0001] The invention belongs to the field of physical and chemical treatment of heavy metals in polluted sediments, and relates to an environment-friendly modified nano material and a preparation method thereof, in particular to a modified nano chloroapatite and a preparation method thereof. Background technique [0002] At present, the problem of heavy metal pollution in our country is becoming more and more serious, which directly threatens human health and survival. Heavy metal pollution mainly comes from mining, metallurgy, surface treatment and heavy industry. There are many ways to treat heavy metal contaminated sediments, but recent research has been concentrated, and the treatment measures that have developed rapidly are mainly bioremediation technology and chemical stabilization technology. Chemical stabilization technology, that is, adding some active substances, such as lime, zeolite, phosphate, organic materials, etc., to the heavy metal polluted sedi...

AI Technical Summary

Problems solved by technology

As a mineral of the apatite group, chloroapatite can passivate the heavy metal lead in the polluted sediment to a certain extent. In the process of mud heavy metal lead, the loss of phosphorus is easy to cause eutrophication of water body, which is unavoidable, so it is subject to certain restrictions in practical application

In addition, although the nano-chloroapatite material is small in size, has good migration performance, and has a large specific surface area, it is easy to collide and agglomerate into large particles in the solution and settle, so the repair effect on heavy metals is poor, and it is also not Can avoid the risk of eutrophication of water bodies

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