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Control agent for peculiar smell of polluted site and preparation method thereof

A control agent and odor control technology, applied in the field of odor control agents and preparations in polluted sites, can solve the problems of complex spraying methods and short effective control time

Active Publication Date: 2021-05-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN111282987A discloses an inhibitor and its treatment method for controlling the odor of polluted soil. A odor inhibitor that can quickly form a film on the soil surface has been prepared, but its effective control time is short and the spraying method is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 1.0L of pure water, add 50g of carboxymethyl chitosan, 20g of β-cyclodextrin, 10g of sodium carboxymethylcellulose, and 20g of polyaspartic acid in sequence under continuous stirring. Add 60ml of glutaraldehyde solution with a concentration of 50% to the mixture, heat it to 70°C, and keep it warm for 2 hours to obtain the odor control agent.

[0016] Spray the control agent prepared in this embodiment evenly on the polluted soil containing toluene, ethyl acetate, and dimethyl disulfide for closed control. Another soil had the same levels of toluene, ethyl acetate, and dimethyl disulfide, but no odor control agent was used. After testing, the use of the odor control agent makes the total release flux of toluene, ethyl acetate and dimethyl disulfide drop by 92% within 14 days.

Embodiment 2

[0018] Take 1.0L of pure water, add 20g of carboxymethyl chitosan, 10g of β-cyclodextrin, 10g of sodium carboxymethylcellulose, and 20g of polyaspartic acid in succession under the condition of continuous stirring. Add 40 ml of glutaraldehyde solution with a concentration of 50% to the mixture, heat to 50° C., and keep the reaction for 2 hours to obtain the odor control agent.

[0019] Spray the control agent prepared in this embodiment evenly on the polluted soil containing toluene, ethyl acetate, and trichlorethylene for closed control. Another soil had the same levels of toluene, ethyl acetate, and trichlorethylene, but no odor control agent was used. After testing, the use of the odor control agent makes the total release flux of toluene, ethyl acetate and trichlorethylene drop by 88% within 14 days.

Embodiment 3

[0021] Take 1.0L of pure water, add 30g of carboxymethyl chitosan, 20g of β-cyclodextrin, 10g of sodium carboxymethylcellulose, and 20g of polyaspartic acid successively under the condition of continuous stirring. Add 70 ml of 50% glutaraldehyde solution to the solution, heat to 50° C., and keep it warm for 2 hours to obtain the odor control agent.

[0022] Spray the control agent prepared in this embodiment evenly on the polluted soil containing toluene, trichlorethylene, and dimethyl disulfide for closed control. Another soil had the same levels of toluene, trichlorethylene, and dimethyl disulfide, but no odor control agent was used. After testing, the use of the odor control agent makes the total release flux of toluene, trichlorethylene and dimethyl disulfide drop by 87% within 14 days.

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PUM

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Abstract

The invention discloses a control agent for peculiar smell of a polluted site and a preparation method thereof. The raw materials of the control agent comprise chitosan, cyclodextrin, cellulose ether, polyamino acid and a cross-linking agent. The raw materials are dispersed in water according to a certain ratio, and a cross-linking agent is added for a reaction to prepare a control agent product; and the control agent product is sprayed to the surface of a polluted site, and the components of the control agent infiltrate along soil pores and form a bonding body with soil, so peculiar smell substances in the soil are prevented from being volatilized to the atmosphere. The preparation method is simple, the raw materials are easy to obtain, cost is low, the effective action time for controlling the peculiar smell of the polluted soil is long, and the control agent is biodegradable and does not generate secondary pollution. The control agent disclosed by the invention can be used for treating the peculiar smell of the polluted site by spraying, and is convenient to operate.

Description

technical field [0001] The invention relates to the technical field of odor treatment and control in polluted sites, in particular to an odor control agent for polluted sites and a preparation method thereof. Background technique [0002] With the rapid development of cities and the needs of industrial upgrading, industrial sites outside the original city limits are gradually included in urban planning, and the soil of contaminated sites left over from the relocation of some petroleum refining, coking, organic chemical, and pesticide companies is rich in benzene series, chlorinated Hydrocarbons, sulfur, nitrogen and other odorous substances. These malodorous substances are continuously released into the atmosphere, affecting the air quality of the surrounding environment and the physical and mental health of the surrounding residents. Disturbing operations during the restoration of contaminated sites accelerates the release of odorous substances, further aggravating the odo...

Claims

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Application Information

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IPC IPC(8): C09K17/32C08J3/24C08L5/08C08L5/16C08L1/28C08L79/08
CPCC09K17/32C08J3/246C08J2305/08C08J2405/16C08J2401/28C08J2479/08C08J2379/08
Inventor 徐仲均刘鹏蒋梦云陈晓春王曙光
Owner BEIJING UNIV OF CHEM TECH
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