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Degradable dust inhibitor for inhibiting and controlling air suspended particulate matters in urban public space

A technology of air suspension and dust suppressant, applied in climate change adaptation, other chemical processes, chemical instruments and methods, etc., can solve problems such as limited means, and achieve the effect of improving effect and flexible environmental adaptability

Inactive Publication Date: 2019-02-12
SHANDONG ACADEMY OF PHARMACEUTICAL SCIENCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it mainly deals with the gas treatment of concentrated industrial emissions, and decontaminates by improving the gasoline and oil products of motor vehicles, while the methods for non-centralized urban gas pollution sources are limited.
[0012] In short, there is no dust suppressant suitable for densely populated spaces such as cities that can safely contact human bodies, green belts, soil, vehicles and buildings. It can directly drop suspended particulate matter in the air, and is safe and environmentally friendly A renewable long-acting dust suppressant that bonds and consolidates floating dust on the surface and corrects gas pollution

Method used

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  • Degradable dust inhibitor for inhibiting and controlling air suspended particulate matters in urban public space
  • Degradable dust inhibitor for inhibiting and controlling air suspended particulate matters in urban public space
  • Degradable dust inhibitor for inhibiting and controlling air suspended particulate matters in urban public space

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Preparation of dust suppressant

[0031] 1. Solution type dust suppressant

[0032]Weigh natural high molecular polymers with different molecular weights according to Table 1-3, add a small amount of ethanol to help disperse evenly, and dissolve with water, and prepare solutions with corresponding mass concentrations, and adjust the pH of the final solution to 5-8 if necessary:

[0033] For Dust Suppressant No. 4, weigh 0.03 g of polyglutamic acid with a molecular weight of 4000 kDa, add 2 mL of ethanol and stir to disperse without agglomeration, then add 98 mL of 0.01 mM pH7.4 PBS buffer solution while stirring to achieve complete dissolution , that is;

[0034] For Dust Suppressant No. 6, weigh 0.5 g of pullulan with a molecular weight of 200 kDa, add 5 mL of ethanol and stir to disperse without agglomeration, then add about 95 mL of water to dissolve completely while stirring, and obtain it;

[0035] Dust suppressant No. 10, weigh 0.1 g of chitosan with a...

Embodiment 2

[0046] Example 2 Corrosion test of dust suppressant

[0047] Take representative metals, plastics, stones, glass, etc. to make discs with a diameter of about 5 cm and a thickness of 0.1 cm. Different materials were soaked separately. Three pieces of the same material were soaked in 200 mL of dust suppressant solution for 72 hours. After taking them out, they were rinsed with distilled water to remove loose corrosion products, wiped dry or blown dry with cold wind, and weighed the material pieces before and after soaking. Mass, take the average value of 3 slices to calculate the corrosion rate.

[0048] Corrosion rate = (mass before immersion - mass after immersion) / (sample area × test period)

[0049] Mass before immersion (g); Mass after immersion (g); Sample area (m 2 ); test period (h)

[0050] Referring to the corrosion grade of aluminum alloy materials, the corrosion rate is 0.003-0.031 g / m 2 When h is a corrosion-resistant aluminum alloy, the corrosion resistance i...

Embodiment 3

[0054] Example 3 In vitro test of skin irritation of dust suppressant

[0055] Choose EpiSkin TM The human skin model kit was pre-cultured according to the operation method in the manual, and 5% SDS (positive control) and 10 μL of the dust suppressant to be tested were applied to the surface of the artificial skin respectively. After acting for 15 minutes, the test substance was removed, and the incubation was continued for 42 hours. Cell viability was detected by MTT assay. Compared with the control group, skin cell activity > 50% indicates that the test substance is not irritating, and skin cell activity ≤ 50% indicates that the test substance is irritating.

[0056] Table 5 Skin irritation test of dust suppressant

[0057]

[0058] The results are shown in Table 5: the skin cell activity of the dust suppressant in Example 1 was >50%, and no obvious skin irritation was seen.

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Abstract

The invention provides a degradable dust inhibitor for inhibiting and controlling air suspended particulate matters in an urban public space. The degradable dust inhibitor comprises a natural macromolecular polymer, wherein the natural macromolecular polymer is selected from one or a combination of more of polyglutamic acid, xanthan gum, hyaluronic acid, hyalurate, chitosan, Pulullan, thermal gelsand gellan gum or a combination of one or a combination of the polyglutamic acid, xanthan gum, hyaluronic acid, hyalurate, chitosan, Pulullan, thermal gels and gellan gum and polyamino acid. The degradable dust inhibitor of the invention contains no inorganic salt or chemical synthetic surfactant, can contact the human body, and is safe and harmless to the human beings, noncorrosive to the treelawn, materials such as metal, rubber and the like as well as infrastructures such as buildings, vehicles and the like, and pollution-free to the environment.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a degradable dust suppressant for suppressing and controlling air suspended particles in urban public spaces. Background technique [0002] Particulate matter is an important source of air pollution. Suspended particulate matter in the air is divided into total suspended particulate matter (TSP), inhalable particulate matter (PM10) and fine particulate matter (PM2.5), with equivalent diameters ≤100, 10 and 2.5 μm, respectively. Most of the large particles in TSP are deposited in the nasopharynx, and about 80% of them are PM10, which can enter the deep part of the respiratory tract, and PM2.5, which accounts for about half of PM10, is deposited in the alveoli. These suspended particles can cause diseases such as the respiratory system and form economic and social burdens. Therefore, for densely populated cities, the air pollution hazards caused by particulate matter are part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/22
CPCC09K3/22Y02A30/60
Inventor 凌沛学刘飞张兰英陈勉陈磊孙康张晓元郝荣华袁超张天娇张秀华张林军袁丹丹
Owner SHANDONG ACADEMY OF PHARMACEUTICAL SCIENCES
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