Method for repairing arsenic-polluted soil by using zeolite-based mineral repairing material
A remediation material and soil remediation technology, applied in the field of arsenic-contaminated soil remediation, can solve problems such as environmental pollution, harm to human health, and aggravation of arsenic soil pollution, and achieve the effects of improving environmental safety, non-biological toxicity, and improving stabilization effect.
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Embodiment 1
[0033] A method for remediating arsenic-contaminated soil using zeolite-based mineral remediation materials, comprising the following steps:
[0034] S101. Preparation of zeolite-based mineral restoration materials
[0035] Included by mass percentage: 2.37% potassium oxide, 7.39% lithium oxide, 0.62% magnesium oxide, 0.037% manganese oxide, 2.36% sodium oxide, 0.021% phosphorus pentoxide, 71.76% silicon dioxide, 0.27% titanium dioxide, the balance It is zeolite composite microsphere; present embodiment is basically the same as embodiment 1, and its difference is that potassium oxide, lithium oxide, magnesium oxide, manganese oxide, sodium oxide, phosphorus pentoxide, dioxide Silicon and titanium dioxide are mixed and pressed to form mixed particles with a particle size of 2mm, and then the mixed particles are mixed with zeolite composite microspheres to obtain a zeolite-based mineral restoration material. The mixed particles made by mixing the above ratio can significantly im...
Embodiment 2
[0047] This embodiment is basically the same as Embodiment 1, except that in the step S102, the zeolite-based mineral restoration material is first mixed with sulfur iron, and then added to the arsenic-contaminated soil;
[0048] Wherein, the mixing method is: adding sulfur iron to the zeolite-based mineral restoration material drop by drop, stirring continuously during the dropping process, after the sulfur iron and the zeolite-based mineral restoration material are mixed, statically Set aside for 12 minutes; adding drop by drop and standing at low temperature can fully mix sulfur iron and zeolite-based mineral restoration materials, thereby improving the stabilization effect of sulfur iron and zeolite-based mineral restoration materials on arsenic-contaminated soil.
Embodiment 3
[0050] This embodiment is basically the same as Embodiment 1, except that in the step S103, two sets of graphite electrodes are inserted after stirring and mixing, and a DC electric field is formed in the arsenic-contaminated soil through the two sets of graphite electrodes, wherein, the The applied voltage of the above-mentioned DC electric field is 750mV; the applied voltage of the above-mentioned DC electric field can effectively improve the stabilization rate of heavy metals such as arsenic in arsenic-contaminated soil by mixed particles and zeolite composite microspheres; Applying it can effectively promote the remediation effect of arsenic-contaminated soil and improve the stabilization effect on arsenic-contaminated soil, and the application of DC electric field will not cause secondary pollution to arsenic-contaminated soil.
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