CN-118699048-B - Waste tire geotechnical structure and benzene permeation prevention treatment method thereof

Abstract

The invention discloses a waste tire geotechnical structure and a benzene permeation prevention treatment method thereof, the treatment method comprises the following steps of sterilizing a waste mask, dissolving ZnCl 2 in HCl, adding pretreated activated carbon, oscillating and stirring, enabling ZnCl 2 solution to enter the activated carbon, drying to constant weight, activating the activated carbon at 850-900 ℃ by using nitrogen to obtain ZnCl 2 modified activated carbon, binding a plurality of waste masks together, wrapping ZnCl 2 modified activated carbon between adjacent waste masks, fixing the waste masks on a geogrid, enabling an outer non-woven fabric of each waste mask to face the waste tire, enabling an inner non-woven fabric to face the geogrid, rolling the ZnCl 2 modified activated carbon in a tread pattern groove of the waste tire, and fixing the bottom end of the geogrid by using a lock catch. The invention effectively solves the potential hazard generated when the junked tires are applied to geotechnical applications, expands the application field of the junked tires, and reduces the pollution generated when the junked tires are applied to soil.

Inventors

• MA BIN
• WANG LIYAN
• ZHU RONGHUI
• WANG SHUO
• WU SILIN
• WU TAO
• JIANG MINGRUI
• GE XIN
• Tan borui

Assignees

• 江苏科技大学

Dates

Publication Date

20260505

Application Date

20240531

Claims (10)

1. 1. The benzene permeation prevention treatment method applied to the waste tire geotechnical structures is characterized by comprising the following steps of: Step one, sterilizing the waste mask, and expanding the surface to form a super-hydrophobic layer; dissolving ZnCl 2 in HCl, adding pretreated activated carbon, oscillating and stirring to enable ZnCl 2 solution to fully enter an inner hole of the activated carbon, drying to constant weight, and activating the activated carbon with nitrogen at 850-900 ℃ to obtain ZnCl 2 modified activated carbon; Binding a plurality of waste masks together, and wrapping ZnCl 2 modified activated carbon between adjacent waste masks; And fourthly, fixing the object obtained in the third step on a geogrid, wherein the outer non-woven fabric of the waste mask faces to the waste tires, the inner non-woven fabric faces to the geogrid, and ZnCl 2 modified activated carbon is rolled in tread pattern grooves of the waste tires.
2. 2. The benzene permeation prevention treatment method for the waste tire geotechnical structures, which is disclosed in claim 1, is characterized in that in the first step, the waste mask is disinfected by soaking the waste mask in NaOH and ethanol solution for 1-3 hours, wherein the mass percentage of NaOH in the NaOH and ethanol solution is 10-12wt%.
3. 3. The method for treating the surface of the mask by using the alkane solvent for surface expansion, which is characterized in that the alkane solvent is removed by low-temperature volatilization.
4. 4. The method for preventing benzene penetration of a waste tire geotechnical structure according to claim 1, wherein in the second step, the activated carbon is walnut sand or bagasse.
5. 5. The method for preventing benzene penetration of a waste tire geotechnical structure according to claim 1, wherein in the second step, the activated carbon is pretreated by cutting the activated carbon into small pieces, washing the small pieces with distilled water for a plurality of times to remove impurities, oscillating the small pieces on a shaking table at 110-120 rpm and 20-30 ℃ for 3-4 hours, washing the activated carbon with deionized water until the pH value is unchanged, and drying the small pieces until the weight is constant.
6. 6. The method for preventing benzene penetration of a waste tire geotechnical structure according to claim 1, wherein in the second step, the mass-volume ratio of ZnCl 2 , HCl and activated carbon is 50 g:50 mL:8~10 g.
7. 7. The method for treating the waste tire geotechnical structures with benzene permeation prevention according to claim 1, wherein in the third step, a plurality of waste masks are stuck or sewn together at the vertical leather strips.
8. 8. The method for treating the waste tire geotechnical structures with benzene permeation prevention according to claim 1, wherein in the third step, the plurality of waste masks are removed to form gaps, and the mask strips are penetrated through the gaps and bound together.
9. 9. The method for preventing benzene permeation in a waste tire geotechnical structure according to claim 1, wherein the waste mask is a disposable medical mask, and the outer layer non-woven fabric is corrugated.
10. 10. A waste tire geotechnical structure based on improvement of waste masks and activated carbon is characterized in that the benzene permeation prevention treatment method of the waste tire geotechnical structure is adopted, the waste tire geotechnical structure comprises waste tires, geogrids and waste mask layers, znCl 2 modified activated carbon is rolled in tread pattern grooves of the waste tires, the waste mask layers are formed by binding a plurality of waste masks together, znCl 2 modified activated carbon is arranged in the waste mask layers, and non-woven fabrics at the outer layers of the waste masks face the waste tires, and non-woven fabrics at the inner layers face the geogrids.

Description

Waste tire geotechnical structure and benzene permeation prevention treatment method thereof Technical Field The invention belongs to the field of environmental protection treatment, and particularly relates to a waste tire geotechnical structure and a benzene permeation prevention treatment method thereof. Background In order to apply the junked tire retaining wall to geotechnical applications (such as tire strip reinforced soil body, tire retaining wall supporting soil body and the like), the prior art is mainly aimed at the mechanical properties of junked tires, the overall properties of the tire retaining wall are optimized and innovated, but whether the junked tires damage soil determines whether the junked tires can be applied to practical geotechnical applications. Test data show that when the junked tires are applied to the underground water level, the junked tires cannot influence soil. When the junked tires are used under the underground water level, due to long-term soaking, a certain amount of benzene can be oozed out of the percolate of the junked tires and the water body to the soil body, and when the benzene leaks or is discharged into the soil, the permeation and migration easily occur, so that the soil is polluted. Benzene has toxic influence on the survival and activity of microorganisms in soil, damages the balance of a soil ecological system, reduces the fertility of the soil and the crop yield, and needs to take measures to solve the pathological problem of the waste tire retaining wall, eliminate the worry of masses on the pathological state of the waste tire retaining wall and expand the implementation field of the tire retaining wall. The benzene element has high degradation difficulty and is easy to be enriched in organisms. The long-term exposure of the skin and respiratory tract of the human body is stimulated to influence the function of blood cells and even cause leukemia. The existing junked tire retaining wall can generate benzene pollution in long-term use. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a benzene permeation prevention treatment method for the waste tire geotechnical structure, which is used for efficiently adsorbing benzene. The technical scheme is that the benzene permeation prevention treatment method applied to the waste tire geotechnical structures comprises the following steps of: Step one, sterilizing the waste mask, and expanding the surface to form a super-hydrophobic layer; Step two, znCl 2 is dissolved in HCl, pretreated activated carbon is added, after shaking and stirring, znCl 2 solution fully enters into an inner hole of the activated carbon, the activated carbon is dried to constant weight, and nitrogen is used for activating the activated carbon at 850-900 ℃ to obtain ZnCl 2 modified activated carbon, so that benzene absorption and energy dissipation of the activated carbon can be greatly enhanced; Binding a plurality of waste masks together, and wrapping ZnCl 2 modified activated carbon between adjacent waste masks; And fourthly, fixing the product obtained in the third step on a geogrid, wherein the outer non-woven fabric of the waste mask faces to the waste tires, the inner non-woven fabric faces to the geogrid, and ZnCl 2 modified activated carbon is rolled in tread pattern grooves of the waste tires, so that benzene elements exuded by the waste tires are further reduced. In the first step, the waste mask is disinfected by soaking the waste mask in NaOH and ethanol solution for 1-3 h, wherein the mass percent of the NaOH in the NaOH and ethanol solution is 10-12wt%, and oil stains and other pollutants on the surface are removed. The surface expansion uses alkane solvent to treat the mask surface, and then the alkane solvent is removed by low-temperature volatilization, and the alkane solvent is diethyl ether or petroleum ether. The waste mask can have the defects of improper germ treatment and easy virus transmission, and can be used in the next step after simple disinfection treatment is carried out. Further, in the second step, the activated carbon is walnut sand or bagasse. The pretreatment of the activated carbon is to cut the activated carbon into small blocks, wash the activated carbon with distilled water for a plurality of times to remove impurities, shake the activated carbon on a shaking table for 3-4 hours at 110-120 rpm and 20-30 ℃, wash the activated carbon with deionized water until the pH value is unchanged, and dry the activated carbon to constant weight. The mass volume ratio of ZnCl 2 to HCl to active carbon is 50g to 50mL to 8-10 g. The adsorption effect of the mask mainly comes from internal melt-blown cotton, and test tests and a plurality of groups of data are summarized to find that the waste mask still has a relatively high adsorption rate on benzene series (benzene, toluene and xylene), and can reach saturation at 10s, and the saturated adsorption quantity of the m