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Preparation method of biomass long-acting heavy metal passivator

A heavy metal passivation agent and biomass technology, applied in the field of soil remediation, can solve the problems of poor metal passivation effect, limited adsorption capacity, short effective time of passivation agent, etc., to neutralize soil acidity, increase soil fertility, Mitigates the effect of poisoning on plants

Active Publication Date: 2020-07-10
江苏和合环保集团有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the common pure biomass metal passivation agent has limited adsorption capacity and will fail after adsorption saturation, resulting in a short effective time of passivation agent and poor metal passivation effect. Therefore, a long-term heavy metal passivation agent for biomass is invented. The preparation method has positive significance to the field of soil remediation technology

Method used

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  • Preparation method of biomass long-acting heavy metal passivator
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Examples

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preparation example Construction

[0028] (1) Preparation of concentrated syrup: take sugarcane and put it into a pulverizer to pulverize it, then squeeze the juice with a juice extractor, filter and separate and remove the filter residue to obtain sugarcane juice, put the obtained sugarcane juice into a rotary evaporator, Rotary evaporation at ℃ for 1 to 2 hours to obtain concentrated syrup, set aside;

[0029] (2) Preparation of biomass sugar adhesive: mix cornstarch with the above-mentioned concentrated syrup and deionized water according to the mass ratio of 1:5:8, put it into a beaker, and use a stirrer at a speed of 200-300r / min After stirring for 10-15 minutes, use a rotary evaporator to concentrate at 70-80°C for 30-40 minutes to obtain a biomass sugar adhesive for later use;

[0030] (3) Preparation of prefabricated passivating agent: Weigh rice husks and put them in a sintering furnace for sintering, collect the rice husk ash produced after sintering, mix the obtained rice husk ash and calcium carbona...

example 1

[0034] (1) Preparation of concentrated syrup: Weigh sugarcane and put it into a pulverizer to crush it, squeeze it with a juicer, filter and separate and remove the filter residue to obtain sugarcane juice, put the obtained sugarcane juice into a rotary evaporator, and heat it at 50°C After rotary steaming and concentrating for 1 hour, the concentrated syrup was obtained and set aside;

[0035](2) Preparation of biomass sugar adhesive: mix cornstarch with the above-mentioned concentrated syrup and deionized water according to the mass ratio of 1:5:8, put it into a beaker, and stir it with a stirrer at a speed of 200r / min for 10min Finally, use a rotary evaporator to concentrate at 70°C for 30 minutes to obtain a biomass sugar adhesive for subsequent use;

[0036] (3) Preparation of prefabricated passivator: Weigh rice husks and put them in a sintering furnace for sintering, collect the rice husk ash produced after sintering, mix the obtained rice husk ash and calcium carbonate...

example 2

[0040] (1) Preparation of concentrated syrup: Weigh sugarcane and put it into a pulverizer to pulverize it, squeeze it with a juicer, filter and separate and remove the filter residue to obtain sugarcane juice, put the obtained sugarcane juice into a rotary evaporator, and heat it at 55°C After rotary steaming and concentrating for 2 hours, the concentrated syrup was obtained and set aside;

[0041] (2) Preparation of biomass sugar adhesive: mix cornstarch with the above-mentioned concentrated syrup and deionized water according to the mass ratio of 1:5:8, put it into a beaker, and stir it with a stirrer at a speed of 250r / min for 13min Finally, use a rotary evaporator to concentrate at 75°C for 35 minutes to obtain a biomass sugar adhesive for subsequent use;

[0042] (3) Preparation of prefabricated passivator: Weigh rice husks and put them in a sintering furnace for sintering, collect the rice husk ash produced after sintering, mix the obtained rice husk ash and calcium car...

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Abstract

The invention relates to a preparation method of a biomass long-acting heavy metal passivator, and belongs to the technical field of soil remediation. The method comprises the following steps: firstly, taking sugarcanes rich in sugar as a raw material, performing juice squeezing to obtain sugarcane juice, and concentrating the sugarcane juice to obtain concentrated syrup; mixing corn starch with the concentrated syrup to obtain a biomass sugar adhesive; then, sintering rice husks as a raw material, and mixing the rice husk ash with calcium carbonate for reaction to obtain a prefabricated passivator; mixing the biomass sugar adhesive with bacillus subtilis to obtain bacteria-containing adhesive; and finally, bonding the prefabricated passivator by utilizing the bacteria-containing adhesive,granulating the prefabricated passivator, and performing drying to obtain the biomass long-acting heavy metal passivator. The passivator prepared by the method has the advantages of good passivatingeffect and long passivating time, and has a promising application prospect.

Description

technical field [0001] The invention relates to a preparation method of a biomass long-acting heavy metal passivator, belonging to the technical field of soil remediation. Background technique [0002] At present, soil heavy metals are irreversible and cannot be degraded. In farmland soil, they not only lead to the decline of soil fertility and crop yield, but also accumulate in organisms through the food chain, posing a serious threat to human health. According to the characteristics of heavy metals and the status of soil pollution, soil heavy metal pollution remediation methods can be divided into two categories: one is to remove heavy metals from soil by physical, chemical or biological methods, so that their concentration in the soil is close to or reaches the soil background value, although the effect of this method is good, but the cost is high; the second is to use the in-situ immobilization technology to add a suitable passivator to the soil to cause a series of adso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00C09K109/00
CPCC09K17/40C09K2101/00C09K2109/00
Inventor 孙乃明
Owner 江苏和合环保集团有限公司
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