Preparation method of hydroxyapatite modified towel gourd vegetable sponge biomorphic heavy metal adsorbent

Abstract

The invention discloses a preparation method of a hydroxyapatite modified towel gourd vegetable sponge biomorphic heavy metal adsorbent. By utilizing the advantage of a multistage porous structure of towel gourd vegetable sponge, the compound heavy metal adsorbent is obtained by fully changing the structural components of hydroxyapatite by an in-situ synthesis method and is applied to highly efficient adsorption purification treatment of heavy metals in a water environment, such as cadmium. The method can be used for controlling micropollution caused by heavy metals in the water environment and reducing heavy metals in smelting wastewater. The method is characterized by mainly utilizing low-concentration (NH4)2HPO4 and a saturated Ca(OH)2 solution as basic liquids and adopting the in-situ synthesis technology to prepare the compound heavy metal adsorbent with a eucalyptus structure. The hydroxyapatite modified towel gourd vegetable sponge biomorphic compound heavy metal adsorbent with natural plant structure morphology is synthesized by manually controlling the preparation process. The preparation method has the beneficial effects that a cheap and environment-friendly material is provided for heavy metal pollution control; a new method and approach is provided for utilization of the agricultural waste, namely towel gourd vegetable sponge; and the heavy metal adsorbent has the advantages of good adsorption effects, wide range of application, simplicity and stability in material preparation, easier process, and the like.

Description

Technical field [0001] The present invention is the field of waste resource utilization and water treatment technology, and specially involves a preparation method for a hydroxylhhelite -changing loofah relic structure heavy metal adsorbent.This method uses loofah as a plant template, and after processing, it is prepared to prepare heavy metal composite adsorbents with hydroxylhhelite and activated carbon as the main material. Background technique [0002] Heavy metal is a toxic element that can be accumulated in the organism. With the development of the industry, heavy metal pollution is widely valued. After entering the environment, heavy metals will accumulate and enrich in the biological chain.Among them, the food chain enters the human body to severely endanger life and health.At present, the method of heavy metals in the water mainly includes chemical precipitation, electric floating selection method, ion exchange method, membrane separation method, and adsorption method. T...

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Problems solved by technology

[0005]Hydroxyapatite is a surface active material, it has similar chemical composition and structure with biological hard tissue, has good biocompatibility and biological activity, is Better bioceramic material, but its mechanical properties are still insufficient. It is used to manufacture adsorption materials with special pore structure, and it is difficult to meet the damage tolerance of liquid through scouring.

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