Silicate-carbonate composite mineral material, preparation method thereof and application of silicate-carbonate composite mineral material in precipitation of heavy metal ions

A technology of heavy metal ions and carbonate minerals, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water pollutants, etc., can solve problems such as long settling time, failure to achieve effective fixation, and increased process costs , to achieve the effects of easy industrial production, remarkable precipitation effect, and simple preparation method
CN114149063APending Publication Date: 2022-03-08WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2022-03-08

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Abstract

The invention relates to a silicate-carbonate composite mineral material, a preparation method thereof and application of the silicate-carbonate composite mineral material in precipitation of heavy metal ions. The silicate-carbonate composite mineral material is obtained by mixing, ball-milling and activating silicate mineral powder and carbonate mineral powder. The silicate-carbonate composite mineral material can efficiently fix heavy metal ions such as cadmium and manganese in a wide pH value range, the solid-liquid separation effect can be achieved through short-time standing precipitation, the precipitation effect is remarkable, the use amount is small, operation is convenient, other impurity ions are not introduced, and the silicate-carbonate composite mineral material is environmentally friendly and suitable for industrial production. The pH value of the treated solution is in a weakly alkaline range, acid neutralization treatment is not needed, and the soil remediation agent is suitable for water treatment and heavy metal contaminated soil remediation and can slowly release silicon, magnesium, calcium and other trace / macroelements needed by plant growth in the heavy metal ion fixing process when being used for soil remediation, and the effect of a fertilizer is achieved.
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Description

technical field

[0001] The invention belongs to the technical field of solution treatment or purification, and in particular relates to a silicate-carbonate composite mineral material, its preparation method and its application in the aspect of precipitating heavy metal ions. Background technique

[0002] A large amount of wastewater containing heavy metals is produced in the process of industrial production, and its discharge will lead to the continuous accumulation of heavy metals in the water body and surrounding soil, causing pollution to the ecological environment, and ultimately threatening human health through the transmission of food chains. Therefore, the removal of heavy metals is of great significance for the protection of water bodies and soil ecological environment.

[0003] There are many processes for removing heavy metals. Alkali precipitation method is a method widely used in industry at present. It mainly adjusts the alkalinity of water body by adding lime,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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