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Biological black carbon treating agent for absorbing and curing cadmium and lead in water body polluted by heavy metals and preparation method thereof

A bio-black carbon and heavy metal technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of occupying large land resources, air pollution, etc., and achieve low cost and easy operation simple effect

Active Publication Date: 2012-02-15
南京农业大学资产经营有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional landfilling, incineration and other methods of disposal not only occupy a large amount of land resources, but also cause air pollution

Method used

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  • Biological black carbon treating agent for absorbing and curing cadmium and lead in water body polluted by heavy metals and preparation method thereof
  • Biological black carbon treating agent for absorbing and curing cadmium and lead in water body polluted by heavy metals and preparation method thereof
  • Biological black carbon treating agent for absorbing and curing cadmium and lead in water body polluted by heavy metals and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] 1. Production process of bio-black carbon

[0057] Straw biomass or domestic waste waste material-fruit peel and banana residue, air-dried or air-dried (water content less than 20%wt), oxygen-limited pyrolysis below 550°C, see figure 1 , to obtain bio-black carbon, whose basic properties are slightly alkaline, organic carbon content >47% wt, loose, ash content <21% wt. (Biological residues, sawdust, corn stalks, rice stalks, nut shells, coconut shells, bark, paper scraps or animal manure can be made into black carbon after heating, so no more details are given)

[0058] 2. Manufacturing process of bio-black carbon particles

[0059] Weigh 1g of sodium alginate and add it to 100mL of deionized water, heat and dissolve at 90°C, add 20g of bio-black carbon over 20 mesh after the sodium alginate solution is cooled, stir well, add medical plastic needle tube, slowly drop into the solution containing 2% CaCl 2 solution, after curing for 1 hour, rinse with deionized water ...

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Abstract

The invention discloses a biological black carbon treating agent for absorbing and curing cadmium and lead in a water body polluted by heavy metals and a preparation method thereof. The preparation method comprises the following steps of: (1) collecting, namely collecting agricultural organic wastes; (2) air-drying, namely air-drying the agricultural organic wastes; (3) carbonizing, namely carbonizing the agricultural organic wastes at the temperature of 300-500 DEG C to obtain biological black carbon; (4) smashing, namely grinding and screening the biological black carbon; (5) modifying, namely adding the screened biological black carbon into a 12wt% sodium alginate solution and uniformly stirring; (6) granulating, namely dropping the biological black carbon-sodium alginate solution obtained in the step (5) into a 2wt% CaCl2 solution, curing and cleaning the mixture by using deionized water, thus obtaining biological black carbon granules; and (7) putting the biological black carbon granules obtained in the step (6) into a drying oven to dry the biological black carbon granules at the temperature of 40-60 DEG C until the biological black carbon granules are constant in weight. The biological black carbon treating agent can effectively absorb and remove the heavy metals, namely cadmium and lead, from the polluted water body, and simultaneously can fully use the agricultural organic waste resources.

Description

[0001] technical field [0002] The invention belongs to the technical field of water environment safety and resource reuse, and in particular relates to a biological black carbon treatment agent for absorbing and solidifying cadmium and lead in heavy metal polluted water and a preparation method thereof. Background technique [0003] Heavy metal pollution is one of the most harmful water pollution problems. It is highly toxic, difficult to be metabolized in the environment, easy to be enriched by organisms, and has the characteristics of biomagnification. It not only pollutes the water environment, but also seriously threatens human beings and aquatic organisms. Survive. The problem of heavy metal pollution in my country's water is very prominent, and the pollution of the bottom of rivers and lakes is as high as 80.1% [Zhou Huaidong, Peng Wenqi, et al. Water Environment and Water Environment Restoration.—Beijing: Chemical Industry Press, 2005.3]. In 2003, the pollution lev...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
Inventor 卞荣军潘根兴李恋卿崔立强
Owner 南京农业大学资产经营有限公司
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