Mercury removing wallpaper for workshops of high mercury industry and preparation method thereof

An industry and workshop technology, applied in the field of non-woven wallpaper and its preparation, which can solve problems such as harming the atmospheric environment and human health.

Active Publication Date: 2017-06-30
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many Hg-involving industry workshops, the concentration of Hg vapor is very high, and there is still no effective method to reduce the emission of mercury vapor into the a

Method used

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  • Mercury removing wallpaper for workshops of high mercury industry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of sponge loaded with nano-selenium

[0028] (1) First disperse 6.4g of dopamine hydrochloride in 5L of deionized water, stir evenly, and stir and react with a constant temperature magnetic stirrer at 25°C for 6 hours. After a period of reaction, the solution in the beaker changes from colorless to brown. Turn into black again, obtain polydopamine aqueous solution;

[0029] (2) After obtaining the polydopamine aqueous solution of 12.5L, add 2 long 60cm, wide 50cm, the sponge of thick 0.5cm and 2 long 50cm, wide 40cm, thick 0.5cm sponge (the total volume of sponge is 5dm 3 ), soaked at 25°C for 1 hour, after a period of time, the solution turns from black to brown;

[0030] (3) Add sodium selenite crystals to the 1L polydopamine aqueous solution that has been added to the sponge so that the initial molar weights of sodium selenite are 0.001mol (0.174g), 0.003mol (0.522g), and 0.005mol (0.87g) , with 40w ultrasonic treatment for 30 minutes to disperse sodium...

Embodiment 2

[0032] Example 2 Preparation of non-woven wallpaper containing loaded nano-selenium sponge layer

[0033] First cut out 4 pieces with a length of 60cm and a width of 50cm with a weight of 80g / m 3 Polypropylene spunbonded non-woven fabric, and then cut out 4 pieces with a length of 50cm and a width of 40cm with a weight of 80g / m 3 Polypropylene spun-bonded non-woven fabric, stick the non-woven fabric to the two sides of the above two pieces of 60cm long, 50cm wide, 0.5cm thick and 2 pieces of 50cm long, 40cm wide, 0.5cm thick nano selenium sponge with double-sided tape , that is, the non-woven wallpaper containing the nano-selenium loading layer is obtained.

Embodiment 3

[0034] Embodiment 3 Concrete detection method and the evaluation of removing mercury vapor effect:

[0035] First paste 2 pieces of non-woven wallpaper with a length of 60cm, a width of 50cm, and a thickness of 0.5cm and two pieces of non-woven wallpaper containing unloaded nano-selenium sponge with a length of 50cm, a width of 40cm, and a thickness of 0.5cm to an initial concentration of 20000ng / m 3 The four walls of the glass box whose length, width and height are 0.6m, 0.5m, and 0.4m respectively, and then use a mercury meter to continuously measure the change of mercury vapor concentration in the glass box every 1s for 10 minutes, and obtain the concentration of mercury vapor over time. Change curve L1, use Microcal Origin 8.0 software to integrate and calculate the area S surrounded by curve L1 L1 , the area is the reduced mercury vapor content of the glass box whose length, width and height are 0.6m, 0.5m, and 0.4m respectively within 10 minutes.

[0036] Then 2 pieces ...

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Abstract

The invention discloses mercury removing wallpaper for workshops of high mercury industry and a preparation method thereof, the mercury removing wallpaper is prepared as follows: dispersing dopamine hydrochloride in deionized water, stirring evenly, completely reacting at room temperature to obtain a polydopamine water solution; adding a sponge into the polydopamine water solution for impregnation to obtain an impregnation mixture; dispersing sodium selenite in the impregnation mixture, stirring evenly, adding ascorbic acid, stirring for reacting completely, taking the treated sponge out, and drying to obtain a nano-selenium-supported sponge; wrapping the surface of the sponge with a non-woven fabric to obtain the mercury removing wallpaper; nano selenium prepared by a chemical synthesis method is attached to a sponge layer, and the gaseous mercury adsorption capability of the mercury removing wallpaper is simply and efficiently developed. The high-efficiency mercury removal efficiency of the mercury removing wallpaper is 97%-99% or so when the initial mercury concentration is 20000-30000ng / m<3>, and the mercury removing wallpaper has great social and economic benefits.

Description

technical field [0001] The invention relates to a mercury-removing wallpaper used in high-mercury industry workshops, in particular to a non-woven wallpaper containing a nano-selenium sponge layer and a preparation method thereof. Background technique [0002] Mercury (Hg, also known as mercury), is a highly toxic element that is extremely harmful to the human body. The famous Japanese Minamata disease incident in history was caused by Hg poisoning. Therefore, Hg has become a highly toxic pollutant for priority control. [0003] Hg is widely used in various industries, such as chemical industry, electrical industry, metallurgical casting, medical industry, military industry and other industries. In many Hg-involving industry workshops, the concentration of Hg vapor is very high, and there is still no effective method to reduce the emission of mercury vapor into the atmosphere from mercury-involving industry workshops, which inevitably produces mercury vapor pollution, whic...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/602B01J20/26B01J20/28033
Inventor 潘响亮易昌毓郑诗仪
Owner ZHEJIANG UNIV OF TECH
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