Method for remedying heavy metal contaminated soil through organic phosphorus and inorganic phosphorus materials
A technology for contaminated soil and heavy metals, applied in the restoration of contaminated soil, etc., can solve the problems of low removal and repair efficiency, easy residual sodium ions, poor leaching effect, etc., to reduce heavy metal pollution, reduce pollution, and purify good effect
Active Publication Date: 2020-05-01
重庆市固体废物管理服务中心有限公司
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Problems solved by technology
[0006] Although this chemical washing repair method overcomes the existing Na 2 The method of leaching heavy metal-contaminated soil with EDTA solution is expensive, produces more filtrate, and is troublesome for follow-up treatment. However, using Na 2 EDTA solution washes heavy metal soil, sodium ions are likely to remain in the soil, and Na 2 The leaching effect of EDTA solution on heavy metal ions such as copper, nickel and chromium in heavy metal soil is poor, and the removal effect and repair efficiency are not high
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preparation example 1
[0042] Preparation Example 1: Prepare 0.4kg of dodecyltrimethylammonium chloride into a 4% solution, add 4kg of rock wool fibers and 1.2kg of 7% polyferric sulfate solution, ultrasonically oscillate for 20min, filter with suction, and place Dry at 60°C for 8 hours to obtain modified rock wool fibers.
preparation example 2
[0043] Preparation Example 2: Prepare 0.6kg of dodecyltrimethylammonium chloride into a 4.5% solution, add 4.5kg of rock wool fibers and 1.4kg of 7.5% polyferric sulfate solution, ultrasonically vibrate for 25 minutes, and filter with suction. Dry at 70°C for 7 hours to obtain modified rock wool fibers.
preparation example 3
[0044] Preparation Example 3: Prepare 0.8kg of dodecyltrimethylammonium chloride into a 5% solution, add 5kg of rock wool fibers and 1.5kg of 8% polyferric sulfate solution, ultrasonically oscillate for 30min, filter with suction, and place Dry at 80°C for 6 hours to obtain modified rock wool fibers.
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The invention discloses a method for remedying heavy metal contaminated soil through organic phosphorus and inorganic phosphorus materials, and relates to the technical field of heavy metal contaminated soil governing The method includes the following steps: S1, removing impurities; S2, soil extraction: putting the contaminated soil particles into soil multi-element ex-situ remediation equipment,and adding an extracting solution with the mass ratio of the contaminated soil particles to the extracting eluent being (1-2):(3-5); S3, passivation: mixing the contaminated soil particles and a soilremediation agent, adding water, and maintaining the mixture for 7-20 d after uniform stirring, wherein the mass ratio of the contaminated soil particles to the soil remediation agent to the water is0.3-0.5:1.3-1.5:2; and S4, improvement treatment: adding a soil improvement agent into the contaminated soil particles with uniform mixing, wherein the mass ratio of the contaminated soil particles tothe soil improvement agent is 1:0.4-0.6. The method for remedying the heavy metal contaminated soil through the organic phosphorus and inorganic phosphorus materials has the advantages of having a good removal effect and a good remediation effect on heavy metal ions such as copper ions, nickel ions and chromium ions.
Description
technical field [0001] The invention relates to the technical field of heavy metal polluted soil treatment, more specifically, it relates to a method for repairing heavy metal polluted soil with organic phosphorus and inorganic phosphorus materials. Background technique [0002] With the continuous development of modern agriculture, the problem of soil pollution is becoming more and more serious. Among them, heavy metals are more stable than other pollutants in the soil, and are not easy to transform and be used by microorganisms, forming the characteristics of accumulation in the soil. The heavy metals referred to in environmental pollution mainly refer to mercury, cadmium, lead, metalloid arsenic with significant biological toxicity, and toxic heavy metal pollutants such as zinc, copper, cobalt, nickel, tin, vanadium, etc. The mobility of heavy metal pollutants in soil It is very small, not easy to leach with water, not degraded by microorganisms, enter the human body thro...
Claims
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IPC IPC(8): B09C1/02B09C1/08B09C1/00B09C1/10
CPCB09C1/00B09C1/02B09C1/08B09C1/10B09C1/105
Inventor 陈其思彭鹏席海苏
Owner 重庆市固体废物管理服务中心有限公司