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Composite soil passivating agent

A passivating agent and soil technology, applied in the direction of soil conditioning materials, restoration of polluted soil, fertilizer mixture, etc., can solve the problems of poor removal effect of heavy metal ions, etc., and achieve small particle size, easy absorption, high reactivity Effect

Inactive Publication Date: 2018-06-08
郭舒洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: Aiming at the problem that traditional soil passivation agents have poor removal effect on heavy metal ions, a composite soil passivation agent is provided

Method used

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  • Composite soil passivating agent

Examples

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Effect test

example 1

[0019] Put the steel slag in a steel slag grinder and pass it through a 300-mesh sieve to obtain steel slag powder. Put the steel slag powder and sulfuric acid with a mass fraction of 50% in a No. 1 beaker at a speed of 500r / min. , stirred and mixed for 60 minutes to obtain a mixed solution, and then filtered the mixed solution to obtain a filter residue, and then washed the filter residue with deionized water for 5 times, then placed the washed filter residue in an oven, and dried it at a temperature of 110°C until Constant weight, obtains modified steel slag powder; In parts by weight, 100 parts of deionized water, 6 parts of Bacillus pasteurianus, 15 parts of glycerol, 10 parts of ethylene glycol are placed in No. 2 beakers, and at a speed of 500r Under the condition of stirring and mixing for 40 minutes, the bacteria liquid of Bacillus pasteuriani was obtained; put the gum arabic powder and water into the No. Move the No. 3 beaker into a magnetic stirrer with digital displ...

example 2

[0021]Steel slag is placed in a steel slag grinder to pulverize, and a 300-mesh sieve is passed to obtain steel slag powder; in parts by weight, 100 parts of deionized water, 6 parts of Bacillus pasteurianus, 15 parts of glycerin, and 10 parts of ethylene glycol are placed in 2 In the No. 3 beaker, under the condition of rotating speed of 500r / min, stir and mix for 40 minutes to obtain the Bacillus pasteurian bacteria liquid; add the gum arabic powder and water into the No. 3 beaker according to the mass ratio of 1:100, and stir and mix with a glass rod for 30 minutes Finally, let it stand for swelling for 4 hours, then move the No. 3 beaker into a magnetic stirrer with digital display speed measurement and constant temperature, and heat and stir to dissolve for 50 minutes at a temperature of 100 ° C and a speed of 500 r / min to obtain gum arabic solution; Using a dropping funnel, add 30 parts of octenyl succinic anhydride dropwise to a three-necked flask containing 40 parts of ...

example 3

[0023] Put the steel slag in a steel slag grinder and pass it through a 300-mesh sieve to obtain steel slag powder. Put the steel slag powder and sulfuric acid with a mass fraction of 50% in a No. 1 beaker at a speed of 500r / min. , stirred and mixed for 60 minutes to obtain a mixed solution, and then filtered the mixed solution to obtain a filter residue, and then washed the filter residue with deionized water for 5 times, then placed the washed filter residue in an oven, and dried it at a temperature of 110°C until Constant weight to obtain modified steel slag powder; add gum arabic powder and water into the No. 3 beaker at a mass ratio of 1:100, stir and mix with a glass rod for 30 minutes, let it stand for swelling for 4 hours, and then move the No. 3 beaker into the digital display to measure the speed With a constant temperature magnetic stirrer, at a temperature of 100°C and a rotating speed of 500r / min, heat and stir to dissolve for 50 minutes to obtain gum arabic; Add ...

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Abstract

The invention discloses a composite soil passivating agent, belonging to the technical field of heavy metal contaminated soil remediation. The composite soil passivating agent is prepared through thefollowing steps: crushing steel slag, carrying out sieving so as to obtain steel slag powder, mixing the steel slag powder and sulfuric acid with a mass ratio of 1: (30-50) under stirring, and carrying out filtering, washing and drying so as to obtain modified steel slag powder; dropwise adding octenyl succinic anhydride into an Arabic gum liquid, carrying out a reaction under stirring so as to obtain a first mixed solution, dropwise adding a sodium hydroxide solution into the first mixed solution, adjusting a pH value of the first mixed solution, carrying out heating and a reaction under stirring so as to obtain a second mixed solution, dropwise adding hydrochloric acid into the second mixed solution, and adjusting a pH value of the second mixed solution so as to obtain a modified Arabicgum liquid; and subjecting the modified steel slag powder, a Bacillus pasteurii solution, urea, the modified Arabic gum liquid, citric acid, malic acid, Carbomer, phospholipid and a protein liquid tomixing under stirring so as to obtain the composite soil passivating agent. The composite soil passivating agent provided by the invention has excellent heavy metal removal effect.

Description

technical field [0001] The invention discloses a composite soil passivator, which belongs to the technical field of remediation of heavy metal polluted soil. Background technique [0002] With the development of industry, soil heavy metal pollution has brought a great threat to the human living environment. Common remediation technologies for heavy metal-contaminated soil mainly include physical remediation, chemical remediation, biological remediation, and agricultural regulation technologies. Among them, chemical passivation / immobilization technology is widely used due to its ability to quickly and significantly reduce the bioavailability and toxicity of heavy metals. Passivation technology mainly relies on passivating agents to reduce the mobility and bioavailability of heavy metals in soil, but cannot remove heavy metals from soil, but exists in soil in a more stable form. Therefore, targeted selection of one or more passivators with high efficiency and long-term stabi...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08
Inventor 郭舒洋殷连海张淼
Owner 郭舒洋
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