Modified nano zero-valent iron-bio-based composite functional material as well as preparation method and application thereof

Abstract

The invention discloses a modified nano zero-valent iron-bio-based composite functional material as well as a preparation method and an application thereof. The modified nano zero-valent iron-bio-based composite functional material comprises vulcanized nano zero-valent iron and a bio-based material, and the bio-based material is used as an adsorption carrier to load the vulcanized nano zero-valent iron; wherein the bio-based material comprises carbon microspheres and calcium alginate; and the vulcanized nano zero-valent iron is prepared from the following raw materials: ferric chloride hexahydrate and a vulcanizing agent. In the preparation process of the modified nano zero-valent iron-bio-based ternary composite material, vulcanized nano zero-valent iron is synthesized by utilizing a one-step method and is loaded on the surfaces of the carbon microspheres and the calcium alginate carrier, and solid loading and calcium alginate loading are combined; the sulfurized nano zero-valent iron material has larger specific surface area, high-efficiency adsorption performance, reduction performance and recovery potential, and can achieve the purpose of efficiently fixing cadmium and chromium pollution at the same time.

Description

technical field [0001] This application relates to the technical field of heavy metal pollution repair materials in environmental protection, in particular to a modified nanometer zero-valent iron-bio-based composite functional material and its preparation method and its application in cadmium and chromium pollution repair. Background technique [0002] Cadmium is recognized as highly toxic to organisms and humans, and has biological activity in terrestrial and aquatic organisms. Due to its high toxicity and strong bioaccumulation, cadmium is listed as the first class of carcinogens. Compared with other heavy metals, cadmium is more soluble and mobile, leading to its uptake by plants, subsequent transport and accumulation in different edible plant parts, and finally enrichment in human body. Rice is an important food crop that supplies 3.5 billion people in the world, and most of the food chain contamination caused by cadmium may originate from this crop. Excessive cadmium ...

AI Technical Summary

Problems solved by technology

[0018] At present, nano-zero-valent iron-bio-based materials are widely used in the removal of heavy metal pollution and some organic pollutants in the laboratory simulation environment and have achieved good results. However, the application of this material to real polluted water and soil heavy metal pollution remediation research relatively few reports

The above-mentioned methods are difficult to achieve the goal of pollution remediation, and there are still some defects, which cannot solve the actual remediation problems in engineering applications.

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