Dosing method suitable for chemical oxidation remediation of polluted sites
A technology of chemical oxidation and oxidation repair, applied in the field of soil pollution control, can solve the problems of incomplete reaction of sodium persulfate, poor soil mixing uniformity, low pollutant removal rate, etc., to achieve simple structure, improve suitability, and ensure uniformity sexual effect
Active Publication Date: 2021-06-04
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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Problems solved by technology
In-situ mixing of large volumes of soil often has problems such as poor soil mixing uniformity and insufficient response of chemicals.
At the same time, the free radicals produced by the activation of sodium persulfate react quickly with organic pollutants, and during the activation process, the OH- in the soil medium is continuously consumed, the pH condition in the environment tends to be neutral, and the oxidation reaction tends to stop. There may be some problems such as incomplete reaction of sodium persulfate in the soil, or low removal rate of pollutants
Method used
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Embodiment Construction
[0024] The features of the present invention and other relevant features are described in further detail below in conjunction with the accompanying drawings through the embodiments, so as to facilitate the understanding of those skilled in the art:
[0025] Such as Figure 1-6 , the marks 1-6 in the figure are respectively:
[0026] Car body 1, crawler type walking base 11, vehicle frame 12, power unit 13, first mechanical arm 14, first hydraulic telescopic rod 15, second mechanical arm 16, second hydraulic telescopic rod 17, front end connector 18, the first Three mechanical arms 19; drug injection storage pumping device 2, drug storage bin 21, drug storage bin 22, crawler type walking base 23, injection metering sensor 24, flow control valve 25, pressure controller 26, high pressure pump 27; Drug pipeline 3, flexible pipeline 31, drug injection lumen 32; stirring injection head 4, rotary tillage and soil cutting cutter head 41, drug injection head 42, drug heating device 43...
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The invention discloses a medicament dosing method suitable for chemical oxidation restoration of polluted sites, which comprises the following steps: dividing the construction area into several restoration units on the plane and dividing it into upper and lower polluted soil layers in depth; Groove the surface and add surfactant; excavate the upper contaminated soil layer in the remediation unit, and use the stirring nozzle on the shallow in-situ stirring equipment to sequentially add alkaline activator and oxidative remediation agent to the lower contaminated soil layer Afterwards, use the excavator to backfill the upper contaminated soil layer, and add and stir the basic activator and oxidation repair agent in the upper contaminated soil layer according to the method in the lower contaminated soil layer; complete the injection and stirring of each repair unit in turn Work; during the maintenance period, add alkaline activator to the soil several times according to the pH monitoring data. The invention has the advantages that: the chemical oxidation remediation agent is added in units and layers in the polluted soil and stirred in situ, thereby ensuring the uniformity of stirring and mixing.
Description
technical field [0001] The invention belongs to the technical field of soil pollution control, and in particular relates to a method for adding chemicals suitable for chemical oxidation restoration of polluted sites. Background technique [0002] With the rapid development of industrialization in our country, the soil environment is constantly being endangered by various pollutions. The main causes of soil pollution are the leakage of toxic and harmful substances in industrial production, the illegal discharge of sewage, the stacking and dumping of domestic garbage, the use of agricultural chemical fertilizers and pesticide residues. Soil pollution not only endangers the safety of the ecological environment, but may also affect human health through various channels. With the development and construction of cities and towns and the promulgation and implementation of various laws and regulations, the demand for remediation and treatment of contaminated soil will increase. ...
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IPC IPC(8): B09C1/08
CPCB09C1/08B09C2101/00
Inventor 王蓉张亚娇宋晓光李韬
Owner SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST