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Remediation method of heavy metal contaminated cultivated land

A remediation method and heavy metal technology, applied in the field of soil remediation, can solve the problems of poor remediation effect of heavy metal-contaminated soil, poor soil fertility, poor crop yield and quality, etc., to improve soil biological and physical and chemical properties, reduce effectiveness, The effect of increasing yield and quality

Inactive Publication Date: 2019-07-19
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, such as ineffective remediation of heavy metal-contaminated soil, poor crop yield and quality, poor soil fertility, etc., thereby providing a method for remediating heavy metal-contaminated cultivated land

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides a method for repairing cadmium-contaminated soil, which specifically includes the following steps,

[0034] The cadmium-contaminated soil to be repaired in this embodiment is the cadmium-contaminated farmland soil in a certain place in Hebei, the soil pH value is 8.41, the organic matter in this soil is 5.35g / kg, the total nitrogen is 0.32g / kg, and the available nitrogen is 8.8mg / kg , Available potassium is 59.3mg / kg, available phosphorus is 12.6mg / kg, and available cadmium content is 0.87mg / kg;

[0035]Determining the type and dosage of the improver: Take the above-mentioned cadmium-contaminated farmland soil sample in a certain place in Hebei, grind it finely after natural air-drying, pass through a 100-mesh sieve, and use the extraction agent extraction-inductively coupled plasma emission spectrometer to measure the effective content of cadmium in the soil. Among them, the extraction agent is 0.005mol / L DTPA; in the laboratory, the biochar am...

Embodiment 2

[0040] This embodiment provides a method for remediating lead-contaminated soil, which specifically includes the following steps,

[0041] The lead-contaminated soil to be repaired in this embodiment is the lead-contaminated farmland soil in a certain place in Shaanxi, the soil pH value is 7.98, the organic matter in this soil is 12.0g / kg, the total nitrogen is 0.7g / kg, and the available nitrogen is 12.82mg / kg , The available potassium is 105mg / kg, the available phosphorus is 10.2mg / kg, and the effective content of lead is 2.89mg / kg;

[0042] Determining the type and dosage of the improver: take the above-mentioned lead-contaminated farmland soil sample in a certain place in Shaanxi, grind it finely after natural air-drying, pass through a 100-mesh sieve, and use the leaching agent leaching-inductively coupled plasma emission spectrometer to measure the effective content of lead in the soil. Among them, the extraction agent is 0.005mol / L DTPA; in the laboratory, the biochar am...

Embodiment 3

[0047] This embodiment provides a method for repairing arsenic-contaminated soil, which specifically includes the following steps,

[0048] The arsenic-contaminated soil to be repaired in this example is the arsenic-contaminated rice field soil in a certain place in Hunan, the soil pH value is 5.64, the organic matter in the soil is 34.5g / kg, the total nitrogen is 1.4g / kg, and the available nitrogen is 15.5mg / kg , Available potassium is 75.1mg / kg, available phosphorus is 42.1mg / kg, and available arsenic content is 2.13mg / kg;

[0049] Determine the type and dosage of the amendment: take the above-mentioned arsenic-contaminated farmland soil sample in a certain place in Hunan, grind it finely after natural air-drying, pass through a 100-mesh sieve, and use the leaching agent-inductively coupled plasma emission spectrometer to measure the effective content of arsenic in the soil. Among them, the extraction agent is 0.5mol / L NaH 2 PO 4 ; In the laboratory FeSO 4 The improvement...

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Abstract

The invention belongs to the technical field of soil remediation, and particularly relates to a remediation method of heavy metal contaminated cultivated land, which comprises the following steps: firstly, deeply ploughing soil and uniformly mixing a heavy metal improver with the soil to improve the soil, and then fertilizing the soil. The method provided by the invention can remarkably reduce theeffectiveness of heavy metals in soil and reduce the influence of the heavy metals on the product quality, and can improve the soil fertility and increase the yield and quality of crops by adopting amode of planting green manure or applying an organic fertilizer.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for remediating cultivated land polluted by heavy metals. Background technique [0002] In the past 30 years, with the rapid development of social economy and high-intensity human activities, the amount of soil degraded by pollution in my country has increased day by day, the scope has continued to expand, and the deterioration of soil quality has intensified. According to the results of the national soil pollution survey, the over-standard rate of cultivated land soil points reached 19.4%, of which, the proportions of slightly, lightly, moderately and heavily polluted points were 13.7%, 2.8%, 1.8% and 1.1%, respectively. The area has reached 150 million mu, accounting for 7.4% of my country's total cultivated land area, resulting in direct economic losses of more than 10 billion yuan, such as production reduction, and 12 million tons of food contamin...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08B09C1/10A01B79/02
CPCB09C1/00B09C1/08B09C1/10B09C1/105A01B79/02B09C2101/00
Inventor 熊静郭丽莉王祺惠霂霖李书鹏陈有鑑阎思诺沈宗泽
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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