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Preparation method and application of ecological modifier for farmland heavy metal contaminated soil

A technology for polluting soil and heavy metals, applied in the field of heavy metal pollution, can solve the problems of poor adsorption efficiency, low efficiency of heavy metal treatment, etc.

Pending Publication Date: 2022-05-31
ZHONGKAI UNIV OF AGRI & ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The raw materials used in existing improvers are relatively conventional, mostly carbon raw materials and other auxiliary inorganic ore soils to adsorb heavy metals, and the adsorption efficiency is poor; as Chinese patent document CN112694893A discloses an existing heavy metal-contaminated soil combination improver and repair heavy metal pollution The soil method, the combined improver is calculated according to the percentage of each component quality of the improver to the soil quality, including the following components: 1-2% organic fertilizer, 2% biochar, 1-2% medical stone, attapulgite 1-2%, phosphate fertilizer 2-3%; the composition raw material that provides in this document is simple, and processing heavy metal efficiency is low, based on this, the present invention provides a kind of preparation method of farmland heavy metal polluted soil ecological improver

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  • Preparation method and application of ecological modifier for farmland heavy metal contaminated soil
  • Preparation method and application of ecological modifier for farmland heavy metal contaminated soil

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preparation example Construction

[0038] A kind of preparation method of farmland heavy metal polluted soil ecological improver of the present embodiment comprises following raw materials in parts by weight:

[0039] Step 1: Add the modified oyster shell powder to the coating locking agent at a weight ratio of 1:3, stir at a speed of 100-300r / min for 45-55min at a stirring temperature of 75-85°C, and stir until the reaction is sufficient and the lock is obtained Adsorbent;

[0040] Step 2: send the locked adsorption matrix into a calciner for calcination for 20-30 minutes, the calcination temperature is 230-250 °C, after the calcination is completed, then perform ball milling treatment, and the ball mill passes through 20-100 mesh to obtain the adsorption ball milling agent;

[0041] Step 3: Add 5-10 parts of fulvic acid and 5-10 parts of humic acid to 60-80 parts of the adsorption ball milling agent. After fully mixing, add 1-5 parts of microbial agent, continue stirring until fully, and the stirring is compl...

Embodiment 1

[0063] A kind of preparation method of farmland heavy metal polluted soil ecological improver of the present embodiment comprises following raw materials in parts by weight:

[0064] Step 1: The modified oyster shell powder is added to the coating locking agent according to the weight ratio of 1:3, stirred at a speed of 100r / min for 45min, the stirring temperature is 75°C, and stirred until the reaction is sufficient to obtain a locked adsorbent;

[0065] Step 2: send the locked adsorption matrix into a calciner for calcination for 20 minutes, the calcination temperature is 230°C, after the calcination is completed, then perform ball milling treatment, and the ball mill passes through 20 meshes to obtain the adsorption ball milling agent;

[0066] Step 3: Add 5 parts of fulvic acid and 5 parts of humic acid to 60 parts of adsorption ball milling agent. After mixing thoroughly, add 1 part of microbial agent, continue stirring until fully, and obtain the improved primary product ...

Embodiment 2

[0088] A kind of preparation method of farmland heavy metal polluted soil ecological improver of the present embodiment comprises following raw materials in parts by weight:

[0089] Step 1: The modified oyster shell powder is added to the coating locking agent according to the weight ratio of 1:3, stirring at a speed of 300r / min for 55min at a stirring temperature of 85°C, and stirring until the reaction is sufficient to obtain a locking adsorbent;

[0090] Step 2: Send the locked adsorption matrix into a calciner for calcination for 30 minutes. The calcination temperature is 250°C. After the calcination is completed, perform ball milling treatment, and the ball mill passes through 100 meshes to obtain the adsorption ball milling agent;

[0091] Step 3: Add 10 parts of fulvic acid and 10 parts of humic acid to 80 parts of adsorption ball milling agent. After mixing thoroughly, add 5 parts of microbial agent and continue stirring until fully. After the stirring is completed, th...

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Abstract

The invention discloses a preparation method of an ecological modifier for farmland heavy metal contaminated soil, which comprises the following raw materials in parts by weight: step 1, adding modified oyster shell powder into a coating locking agent according to a weight ratio of 1: 3, stirring for 45-55 minutes at a rotating speed of 100-300r / min and a stirring temperature of 75-85 DEG C, and stirring until the reaction is sufficient to obtain a locking adsorption body; according to the soil ecological improver, the modified oyster shell powder and the coating locking agent are adopted to prepare a locking adsorption body, the inorganic performance of heavy metals in soil and the organic performance raw materials in the coating locking agent are combined by utilizing the characteristics of the locking adsorption body, and the activity of a cross-linked network body formed by matching acetaminophen and other active groups is better; furthermore, the soil is coated and locked, so that the modified oyster shell powder can conveniently adsorb heavy metals on the soil.

Description

technical field [0001] The invention relates to the technical field of heavy metal pollution, in particular to a preparation method and application of an ecological improver for farmland heavy metal polluted soil. Background technique [0002] The sources of soil heavy metal pollution in my country mainly include industrial site relocation, urban garbage, sewage irrigation, atmospheric deposition, and improper disposal of waste. Soil pollution has the characteristics of complex causes, wide range of pollution, and high cost of treatment. Therefore, the research on soil heavy metal pollution remediation technology has attracted much attention. At present, there have been a large number of reports on the remediation technology of soil heavy metal pollution at home and abroad, mainly including soil leaching method, bioremediation method, barrier landfill method and solidification-stabilization method. The remediation principles include two kinds: one is to change The form of ...

Claims

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Application Information

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IPC IPC(8): C09K17/40A01B79/02C09K101/00
CPCC09K17/40A01B79/02C09K2101/00
Inventor 俞龙生刘晖历军许铭宇田美玲林泽帆杜海珊张雷
Owner ZHONGKAI UNIV OF AGRI & ENG
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