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Iron humate-microbe composite soil pollution repairing agent and preparation method thereof

A technology of iron humic acid and composite restoration, which is applied in soil conditioning materials, chemical instruments and methods, fertilizer mixtures, etc., to achieve the effects of small environmental risks, low production costs, and low production costs

Active Publication Date: 2016-03-09
HUNAN MEIXINLONG ECOLOGICAL ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the iron-reducing bacteria-mineral composite bacterial agent in the patent application CN101586094A, the ternary composite repair agent has higher electron transfer efficiency and organic pollution repair efficiency, but iron oxide and humus are two different types of exogenous electrons. There is still a lot of room for improvement in the efficiency of its cooperation with iron-reducing bacteria to promote the degradation of pollutants.

Method used

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  • Iron humate-microbe composite soil pollution repairing agent and preparation method thereof
  • Iron humate-microbe composite soil pollution repairing agent and preparation method thereof
  • Iron humate-microbe composite soil pollution repairing agent and preparation method thereof

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preparation example Construction

[0037] A preparation method of a binary composite restoration agent of iron humate and humus-reducing bacteria, comprising the steps of:

[0038] S1: extract humic acid;

[0039]S2: preparing iron humate;

[0040] S3: strains cultured in shake flasks;

[0041] S4: fermenting and preparing bacterial agent;

[0042] S5: Mix to form a repairing agent.

[0043] The preparation of the binary composite restoration agent is carried out by using the above method, which specifically includes:

[0044] Step 1 Extraction of humic acid: Add 100g of raw materials rich in humic acid such as peat soil, lignite or weathered coal into 150-200ml of 0.1-0.15M NaOH solution, extract at 150-200rmp for 12-24h, and extract at 4000-6000g Centrifuge for 10-20min for solid-liquid separation; add 150-200ml of 0.1-0.15M NaOH to the solid phase again, extract at 150-180rmp for 12-24h, repeat this step 2-4 times; combine the liquid phases extracted multiple times , and then add 1-3M HCl to acidify to ...

Embodiment 1

[0050] Preparation of peat soil ferric humate and Shewanella putrefaction complex organic pollution remediation agent

[0051] (1) Humic acid extraction: add 100g of peat soil to 150ml of 0.15M NaOH solution, extract at 150rmp for 24h, and centrifuge at 6000g for 10min to separate the solid from the liquid; The liquid phases were combined, and then acidified by adding 2M HCl until the pH was 1.92 to obtain a flocculent precipitate, which was lyophilized and set aside.

[0052] (2) Preparation of humic acid iron: adding 1.5g of extracted humic acid to 500ml concentration of 0.02M Na 4 P 2 o 7 In the solution, after fully mixing, centrifuge at 14000g for 15min to separate the solid phase and discard the solid phase precipitate; add 7.5mM Fe(SO 4 )·7H 2 O, adjust the pH of the mixed solution to 7.0; then put the mixed solution in a polypropylene plastic container, keep it at 35°C for 5 days, then centrifuge at 15,000g for 20 minutes, discard the liquid phase, and the obtained...

Embodiment 2

[0058] Preparation of compound organic pollution remediation agent of peat soil iron humate and Comamonas korean

[0059] (1) Humic acid extraction: Add 100g of peat soil to 200ml of 0.1M NaOH solution, extract at 200rmp for 12h, centrifuge at 6000g for 15min for solid-liquid separation; The liquid phases were combined, and then acidified by adding 3M HCl until the pH was 1.84 to obtain a flocculent precipitate, which was lyophilized and set aside.

[0060] (2) Preparation of humic acid iron: adding 2g of extracted humic acid to 1000ml concentration of 0.012M Na 4 P 2 o 7 In the solution, after fully mixing, centrifuge at 12000g for 20min to separate the solid phase and discard the solid phase precipitate; add 6mM Fe(SO 4 )·7H 2 O, adjust the pH of the mixed solution to 7.0; then put the mixed solution in a polypropylene plastic container, keep it at 30°C for 7 days, then centrifuge at 15,000g for 20 minutes, discard the liquid phase, and the obtained precipitate is ferric...

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Abstract

The invention discloses an iron humate-microbe composite soil pollution repairing agent and a preparation method thereof. The composite repairing agent is composed of iron humate and humus reducing bacterium, wherein the humus reducing bacterium is shewanella putrefaciens or South Korea comamonas; each millimeter of composite repairing agent comprises 0.002 to 0.01 gram of iron humate, the number of humus reducing bacterium in each millimeter of composite repairing agent is more than 10<8>CFU; the iron humate is a complex prepared from humic acid and Fe(SO4).7H2O; the preparation method of the composite repairing agent comprises the following steps: extracting humic acid, preparing iron humate, culturing bacterium strains in a shake flask, carrying out fermentation to prepare inoculant, and mixing to prepare the repairing agent. Compared with the prior art, the provided repairing agent can be used to repair soil polluted by organic compounds, and has the advantages of good repairing effect, quick repairing speed, low production cost, simple and convenient preparation method, and easiness for large scale production.

Description

technical field [0001] The invention relates to the field of soil treatment and restoration, in particular to a soil pollution restoration agent compounded with iron humate and microorganisms and a preparation method thereof. Background technique [0002] Due to the large-scale use of pesticides and fertilizers and the large-scale discharge of pollutants such as petroleum, polycyclic aromatic hydrocarbons, and organic chlorine, the problem of organic soil pollution in my country is serious. The 2014 "National Soil Pollution Survey Bulletin" pointed out that the over-standard rates of the three types of organic pollutants in my country's soils were 0.5%, 1.9%, and 1.4%, respectively; the most serious over-standard soil types were mainly It is arable land and forest land, as well as heavily polluting enterprise land, industrial waste land, industrial parks, solid waste centralized treatment and disposal sites, oil production areas, etc. In addition, according to the survey res...

Claims

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Application Information

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IPC IPC(8): C09K17/00C09K101/00
Inventor 王继红余震周顺桂王跃强
Owner HUNAN MEIXINLONG ECOLOGICAL ENVIRONMENTAL PROTECTION TECH
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