How to treat lead contamination, the terrible lead contamination

Lead is toxic to most people. But do you know how serious the lead pollution is in our country right now? Moreover, the source of most of the lead pollution is hundreds of millions of ordinary incognito, which is our traditional tin foil used for rituals --- thousands of years.

The price of tin is about ten times the price of lead, so the tin foil used for sacrifice is in name only, but it is actually lead paper. In addition, the old ladies in the countryside all recognize that the ash burned by tin foil is yellow. They knew that lead oxide was yellow and tin oxide was gray.

Assuming that every Chinese uses one pound of sacrificial tin foil a year, then at least 500,000 tons of lead dust pollution will be discharged into nature every year. Twenty years is more than 10 million tons. In total, the United States has released more than 10 million tons of lead into the environment throughout its history of using leaded gasoline.

Unleaded gasoline is now used all over the world because everyone is aware of the dangers of lead contamination. But I think China is the only country in the world where there is no need to use unleaded gasoline. Even if we were to use all leaded gasoline now, only 100,000 tonnes of lead would be emitted into the environment each year.

Far less than the amount of foil emitted into nature by burning tin foil. Lead does not degrade, but only accumulates more and more, and will be enriched by animals and plants, and enter the human body through the food chain. The blood lead content of Chinese people today is 500 times higher than that of the ancients 1,000 years ago.

Why? Although the ancients also burned paper money, only a few people who had the money to burn tin foil were instructed. If everyone who realizes this, starting with themselves, you can burn paper money, but please don't burn tin foil.

Then you are doing good deeds and accumulating virtue, otherwise you are really doing evil, and the lack of virtue you have done will be retributed on yourself and on the heads of your children.

Lead-containing waste gas treatment techniques mainly include the following:

Heavy metal trap method: the use of various chemical agents or materials to adsorb or trap lead particles in lead-containing waste gases, such as activated carbon, zeolite, nanomaterials, etc.

Pickling method: the use of acidic solution to oxidize the lead in the lead-containing waste gas into water-soluble lead salt, so as to achieve the purpose of removing lead.

Activated oxidation method: through the action of oxidant, the lead reed state in the lead-containing waste gas is converted into water-soluble lead salt as early as possible, such as iron chloride method, ozone oxidation method, etc.

Membrane separation technology: Membrane filtration technology, reverse osmosis technology, etc., are used to separate the lead ions in the lead-containing waste gas from the waste gas to achieve the purpose of removing lead.

Pyrolysis reduction method: the lead-containing waste gas is reduced to metallic lead after heating at high temperature, and then used to form compound precipitation or direct ** with other metal ions at high temperature.

The above technologies need to select the appropriate treatment method according to the specific composition, concentration, treatment effect requirements and other factors of the exhaust gas, and carry out equipment design and commissioning. At the same time, attention should be paid to the safety protection of the environment and personnel in the process of handling to avoid accidents.