Polluted site peculiar smell control agent and preparation method thereof

Abstract

The invention discloses a polluted site peculiar smell control agent and a preparation method thereof. The peculiar smell control agent comprises the following components in percentage by weight: 10-20% of polyvinyl alcohol, 1-2% of soluble starch, 1-2% of ammonium chloride, 3-5% of sodium dodecyl benzene sulfonate, 1-3% of lauryl sodium sulfate, 1-2% of xanthan gum and the balance of water. The peculiar smell control agent integrates the advantages of a foaming agent and a liquid mulching film, a large amount of foam is generated firstly after spraying, soil and surrounding air can be quickly blocked, peculiar smell on the surface of the soil is inhibited from diffusing to the surrounding atmosphere, and a compact polymeric membrane structure is gradually formed on the surface of the soil under the action of a film-forming agent along with foam hole blasting disappearance; therefore, the peculiar smell control agent disclosed by the invention can quickly and enduringly inhibit diffusion of the peculiar smell of the polluted soil, has a relatively good control effect on the peculiar smell of the soil in a polluted site, and does not generate new pollution.

Description

technical field [0001] The invention relates to an odor control agent for polluted sites and a preparation method thereof, which belongs to the field of odor control for remediation of contaminated sites. Background technique [0002] During the excavation process of remediation of contaminated soil at organic polluted sites, volatile organic compounds, semi-volatile and other pollutants in the soil are easily diffused into the atmosphere and produce odors, causing secondary pollution of the atmospheric environment. [0003] At present, methods such as film covering and foam covering are often used to control the odor problem in the process of remediation of contaminated sites. HDPE film is usually used for film covering. This method cannot fundamentally solve the problem of the diffusion of polluting gases, but can only temporarily alleviate the diffusion rate of the gas. Moreover, the efficiency of laying HDPE membranes in large areas is low, and the discarded HDPE membran...

AI Technical Summary

Problems solved by technology

[0002] During the excavation process of remediation of contaminated soil at organic pollution sites, volatile organic compounds, semi-volatile and other pollutants in the soil are easily diffused into the atmosphere and produce odors, causing secondary pollution of the atmospheric environment

[0003] At present, methods such as film covering and foam covering are often used to control the odor problem in the process of remediation of contaminated sites. HDPE film is usually used for film covering. This method cannot fundamentally solve the problem of the diffusion of polluting gases, but can only temporarily alleviate the diffusion rate of the gas. Moreover, the efficiency of laying HDPE membranes in large areas is low, and the discarded HDPE membranes after use will also cause new pollution.

Spraying foam can temporarily isolate the polluted soil from the surrounding air and control the spread of odor. Due to the poor stability of the foam and short half-life, the foam duration is generally 6-12 hours. As the foam disappears, the odor control effect will also fail, and the odor cannot be removed for a long time. control

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