Preparation method of loaded type nano iron underground water remediation agent

Abstract

The invention discloses a preparation method of a loaded type nano iron underground water remediation agent and belongs to the field of remediation agents. The preparation method of the loaded type nano iron underground water remediation agent comprises the following steps: preparing a porous bone charcoal carrier from ox bone, directly mixing the carrier with an iron salt solution, dropwise adding a reducing agent into a mixed solution for reducing iron ions, forming precipitate in the iron ion reducing process, combining the precipitate with the porous bone charcoal carrier, and finally carrying out magnetic separation to obtain the underground water remediation agent. According to the preparation method of the loaded type nano iron underground water remediation agent, hydroxyapatite in the bone charcoal carrier can be used for extremely effectively removing the heavy metals, is high in degradation rate of heavy metal ions in the soil, is biodegradable, and is free of secondary pollution; the nano iron and the porous bone charcoal carrier are combined to prepare the remediation agent; the remediation agent is short in remediation time , high in remediation quantity and low in preparation cost; due to the loaded and coated nano iron, the problem of influence on the surface activity caused by the oxidization of the remediation agent when the remediation agent is in direct contact with the air can be avoided; the remediation agent has a wide application prospect.

Description

technical field [0001] The invention discloses a preparation method of a loaded nano-iron groundwater restoration agent, which belongs to the field of restoration agents. Background technique [0002] Organic pollution refers to the impact of exogenous organic pollutants on water microorganisms, aquatic animals and plants, and even human beings. [0003] The type of water pollution causing the hazard. Such pollutants usually have certain biological toxicity and are not easily degraded by microorganisms. In addition to certain acute biological toxicity, some of these pollutants will also accumulate and amplify in organisms through the food chain and affect the growth and development of organisms, which is extremely harmful to aquatic ecological health, and the need for treatment is very urgent. However, such water pollutants are usually hydrophobic and are not easily degraded by microorganisms. Therefore, how to choose appropriate treatment methods to treat this type of pol...

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is that the nano-materials synthesized by the current simple liquid phase method are easy to agglomerate, and the highly active nano-iron will spontaneously ignite when exposed to the air, and will be oxidized when it is slowly exposed to the air, and iron oxide will be formed on its surface The membrane loses its surface activity, and the repair agent is prone to secondary pollution, long repair period, small repair amount, low repair rate, and high repair cost. A preparation method for a loaded nano-iron groundwater repair agent is provided. The invention uses bovine bone to prepare a porous bone charcoal carrier, and directly mixes the carrier with an iron salt solution, and drops a reducing agent into the mixed solution to reduce iron ions. During the iron ion reduction process, a precipitate can be formed to combine with the porous bone charcoal carrier, and finally The groundwater remediation agent is obtained after magnetic separation. The present invention utilizes the hydroxyapatite in the bone char carrier, which can remove heavy metals very effectively, has a high degradation rate of heavy metal ions in soil, is biodegradable, and will not cause secondary pollution. Nano-iron and The porous bone charcoal carrier is combined with the preparation of the repair agent, the repair time is fast, the repair amount is large, and the preparation cost is low. The coated nano-iron avoids the oxidation caused by direct contact with the air and affects the surface activity. It has broad application prospects.