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Preparation method of oil-heavy metal compound polluted salinized soil remediation improver

A compound pollution and soil remediation technology, applied in the direction of chemical instruments and methods, soil conditioning materials, fertilizer mixtures, etc., can solve the problems of soil oil pollution, polluted surface soil, etc., and achieve the effect of promoting plant growth, simple operation, and low cost

Active Publication Date: 2016-05-04
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the waste mud in most well sites of Changqing Oilfield in Shaanxi has been piled up without treatment to pollute the surface soil, and soil oil pollution is common in the mining area of ​​Momoge Wetland Oilfield in northwest Jilin, etc.

Method used

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  • Preparation method of oil-heavy metal compound polluted salinized soil remediation improver
  • Preparation method of oil-heavy metal compound polluted salinized soil remediation improver
  • Preparation method of oil-heavy metal compound polluted salinized soil remediation improver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Preparation of oil-heavy metal compound polluted salinized soil remediation improver

[0021] In the first step, the carbon black is in the form of black powder or granular powder after drying; the iodine adsorption value of carbon black (mg / g) is ≥ 800; the decolorization of methylene blue (ml) is ≥ 7-8; the pH value is 6-8; Moisture (%)≤10; Ash content (%)≤5. After carbon black is used in the sewage treatment of food processing industry, it is solid waste.

[0022] The second step, the preparation of highly efficient oil-degrading bacteria: two strains of bacteria, Bacillus subtillus and Sphingobacterium multivolum, were screened from the polluted soil near the oil production well in Shengli Oilfield, and the two strains were prepared at a ratio of 1:1. 8×10 10 Individual / ml compound strains;

[0023] The third step, compounding of improver: biogas residue is air-dried and crushed through a 10-mesh sieve, and compounded with carbon black, urea, and high-...

Embodiment 2

[0030] Example 2. Comparative test of formulations of petroleum-heavy metal compound polluted salinized soil remediation improver

[0031] Petroleum-heavy metal compound polluted salinized soil remediation improver formula of the present invention and comparative ratio formula scheme are as shown in table 2:

[0032] Table 2 formula scheme

[0033]

[0034] The impact of oil-heavy metal compound polluted salinized soil remediation improver of the present invention on tomato output is as shown in table 3, and comparative example 2 and the formula of the present invention are significantly higher than comparative example 1 to tomato output, consider that carbon black is beneficial in Heavy metals are passivated in the process of petroleum degradation, so the formula of the present invention is selected: air-dried biogas residue 88%+10% carbon black+2% urea+high-efficiency petroleum-degrading bacterial agent, among them.

[0035] The impact of table 3 improvers on tomato yiel...

Embodiment 3

[0037] Example 3: Effect Test of Petroleum-Heavy Metal Composite Pollution Salinized Soil Remediation Improver

[0038] The test plan is shown in Table 4:

[0039] Table 4 Experimental scheme of different modifiers

[0040]

[0041] Note: Ⅰ in the table means 0.2% petroleum-10mg·kg -1 Cd simulates petroleum-heavy metal compound polluted soil; Ⅱ represents 0.2% petroleum-100mg kg -1 Ni simulates petroleum-heavy metal compound polluted soil.

[0042] The test results are as follows:

[0043] 1. The influence of amendments on the activity of heavy metals in soil

[0044] Changes of available Cd and Ni content in the soil after adding amendments for 60 days Figure 1-2 shown. figure 1 and figure 2 In , the abscissa indicates the number of days of cultivation, and the ordinate indicates the content of available Cd and available Ni in the soil (mg / kg), respectively. figure 1 , figure 2 It shows that adding amendments can inhibit the activation of heavy metals in the pr...

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Abstract

The invention relates to a preparation method for an amendment used for restoration of petroleum-heavy metal combinedly-contaminated saline soil. The preparation method comprises the following steps: airing carbon black to obtain a black powder or particle; preparing 8*10<10> / ml of a composite strain from bacillus subtilis and sphingobacterium multivolume in a ratio of 1: 1; air drying a biogas residue, crushing the biogas residue, sieving the crushed biogas residue with a 10-mesh sieve and compounding the biogas residue with carbon black, urea and a high efficiency petroleum degrading bacterium according to a certain proportion; and carrying out flat-mold type extrusion and granulation to produce a cylindrical particle, rounding the cylindrical particle by using a rounding machine, then screening the particle with a vibrating screen, allowing the particle to enter into a cooler for cooling and then carrying out weighing and bagging. The amendment prepared by using the method provided by the invention can reduce activity of heavy metals in the degradation process of petroleum while realizing high efficiency degradation of petroleum hydrocarbons in soil by using the petroleum degrading bacterium, accelerates growth of plants grown in saline soil and promotes micro-biological degradation efficiency by using the plants. The method provides a highly efficient, economic and safe amendment for microbe-plant restoration of mild petroleum-heavy metal contaminated soil.

Description

Technical field: [0001] The invention relates to a preparation method of an in-situ repair and improvement agent applied to petroleum-heavy metal compound polluted salinized soil. Background technique: [0002] With the substantial increase in the demand for oil, the oil extraction industry has developed rapidly. The problem of oil pollution in the process of mining, transportation, storage, processing, etc. is quite prominent. As the world's largest oil producer and consumer, China has explored and developed more than 500 oil fields, and its annual oil output has exceeded 1×10 11 kg. Due to the relatively backward oil recovery technology and poor airtightness of major oilfields in the past few decades, coupled with relatively backward environmental protection measures, lack of pollution control and restoration technology, etc., the degree of petroleum pollution in my country's soil is much higher than that of developed countries, and presents a Accumulated and aggravated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/00
Inventor 成杰民陈雪兰高宪雯周伟王晓凤
Owner SHANDONG NORMAL UNIV
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