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Soil heavy metal repair reduction technology

Country/Region china
Company Shanghai Duoke Energy TechnologyCo., Ltd
Categories Gas Purification System
ICP License Issued by the Chinese Ministry
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    Soil heavy metal repair reduction technology

    Soil restoration is the transfer, absorption and drop of physical, chemical and biological methods.

    The main technical principle of the main technology

    The pollutant in the solution and the transformation of the soil can be reduced to the acceptable level or the toxic and harmful pollutant into harmless material. Fundamentally said that the principle of contaminated soil remediation technology to include: (1) change pollutants in the soil of existence form, or the same soil binding mode, reduce the in the environment of migration and biological can use; (2) reduce the concentration of harmful substances in the soil.

    U.S. investment in contaminated soil remediation in the twentieth Century 90's has nearly $100000000000. The theory and technology of contaminated soil remediation have become the frontier of environmental science and technology research.. Soil remediation process is rather long, to solve the problem of soil pollution, need to have different discipline scientists such as pedology, agronomy, ecology, biogeochemistry, marine science and involving agriculture, forestry, fisheries and other related production units and government decision-making of joint efforts.

    The pollution of soil has threatened the sustainable use of land resources and the ecological security of agricultural products.. The affected by organic pollutants in the farmland has reached 36 million hectares, the types of pollutants including oil, polycyclic aromatic hydrocarbons, pesticides, organic chlorine; for oil exploitation caused serious oil pollution land area of 10000 hectares, oil refining industry also make large area of land is polluted; in Shenyang and Fushun petroleum wastewater irrigation area, surface and bottom soil PAHs are more than 600 mg / kg, causing serious pollution of crops and groundwater.

    National affected by the heavy metal pollution of land amounted to 20 million hectares, which seriously polluted the land of more than 70 million hectares, which 13 million hectares of land for cadmium content exceeded and are forced to abandon. Because of this, China's contaminated soil remediation research is undergoing a transition from laboratory to practical stage, which is about to enter a fast and comprehensive management period.


    1, thermodynamic repair technology, the use of heat conduction, heat blankets, hot wells or hot walls, etc., or heat radiation, radio waves heating and other pollution soil remediation.

    2. The thermal desorption technology of the pyrolysis and absorption of organic matter from the soil heated to the organic boiling point of the organic matter, so that the organic matter in the soil can be separated into the gaseous state and then separated..

    3 and incineration, incineration of contaminated soil in the incinerator, the harmful substances of high molecular weight? Volatile and semi volatile, broken down into low molecular of flue gas after dust removing, cooling and purification treatment of flue gas to achieve the discharge standards.

    4, landfill method, the waste as a mud sludge applied into the soil through fertilization, irrigation, adding lime and regulation of soil nutrition, moisture and pH value to keep the contaminants in the upper layer of soil aerobic degradation. Soil pH and humidity can be detected by soil acidity, and soil EC was detected by soil EC, and the effect of soil amelioration was viewed..

    Detection of soil pH

    5, chemical leaching, with can promote soil dissolved contaminants or migration of chemical / biological chemical solvent under the action of gravity or by the hydraulic pressure drive leaching liquid is injected into the contaminated soil, and then the containing pollutants solution is extracted out from the soil, into the line of separation and wastewater treatment technology.

    6, composting using traditional composting method, accumulation of soil pollution, pollutants and organic matter, rice straw, wheat straw, wood chips, wood and bark manure mixed together, relying on the composting process in the role of microorganisms in soil degradation of refractory organic pollutants.

    7, phytoremediation, using agricultural technology improve the soil on plant growth adverse chemical and physical constraints, to prepare the ground for planting, and the optimization of planting plants and Rhizosphere Microorganism directly or indirectly, volatile, separation, degradation of pollutants, restore to build natural ecological environment and vegetation landscape.

    8, permeable reactive barrier is a kind of in situ processing technology, in the shallow layer of soil and groundwater, build a of permeability, containing the walls of reaction materials, water pollution through the wall in reactions where the contaminants and wall material occurs physical and chemical reaction was purified.

    9, bioremediation, using biological, especially microbial degrad

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