Preparation method of attapulgite-loaded nanometre iron material

Abstract

The invention provides a preparation method of an attapulgite-loaded nanometre iron material. Acidized and modified attapulgite is taken as a load material, and KBH4, NaBH4, N2H4 and the like are taken as reducing agent under the protection of inert gases, so that ferric salt or ferrite can be reduced to be zero-valent iron; and the multi-duct characteristic of the attapulgite is utilized, so that nanometre iron particles are sufficiently dispersed and fixedly loaded on the attapulgite material. Compared with un-loaded nanometre iron, the attapulgite-loaded nanometre iron material prepared by the preparation method has better dispersibility and stability, is more uniform in particle size distribution, not easy to cause particle agglomeration and self-oxidization; and moreover, the attapulgite-loaded nanometre iron material has better suspension property and stability in aqueous solution, a stronger oxidative degradation ability to environmental pollutants, longer effective reaction time, and a better adsorption capacity. The material is expected to be extensively applied to environment pollution abatement and repair engineering, and fills a blank in the filed at home and abroad.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental functional materials and nanometer materials, and in particular relates to a preparation method of attapulgite loaded nanometer iron materials. Background technique [0002] Due to the advantages of small scale, large surface effect, and high reactivity, nano-iron can quickly and effectively degrade environmental organic pollutants or restore and fix heavy metal pollution in the environment. It is a very good environmental functional material. The production cost of nano-iron is relatively low, and there is little harm to the environment and human health. Therefore, nano-iron has been widely valued in soil, wastewater, air and groundwater pollution control and restoration work, and has a very broad application prospect in the field of environmental protection in the future. [0003] Since the particle size of nano-iron is 50-200nm, the specific surface area is large, it is ea...

AI Technical Summary

Problems solved by technology

[0003] Because the particle size of nano-iron is 50-200nm, the specific surface area is large, it is easy to cause particle agglomeration reaction, it is difficult to maintain a stable suspension state, it is not conducive to its full contact reaction with environmental pollutants, and it is easy to cause the problem of low use efficiency. One of the key factors applied in practical engineering

In addition, when nano-iron is exposed to air, it is easily oxidized or even spontaneously ignited, and the resulting surface oxide layer will reduce the activity of nano-iron particles, which will affect the treatment effect on pollutants