There will be acid rain in the next few days, why will it rain acid

According to the Shanxi Evening News on April 21, according to the International Meteorological Department, the current volcanic ash cloud continues to spread eastward and southward with the high-altitude jet stream, with no signs of weakening, and may even spread to Xinjiang and Northeast China in the next few days. Will volcanic ash from Europe come to China with the air current, how likely is acid rain, and will it cause cancer? To this end, the reporter of Huashang.com interviewed relevant experts and researchers.

Liu Yong, chief forecaster of the Shaanxi Provincial Meteorological Observatory, told a reporter from Huashang.com that he himself also noticed that there was news that the volcanic ash in Europe might spread to Xinjiang and Northeast China, and as a weather forecaster, he could not determine what substances were contained in the volcanic ash, he could only determine that if the volcanic ash contained harmful substances, then once the rain encountered this harmful substance would fall, "such as sandstorm weather rainfall, and what will pour on people is muddy water", whether it is acid rain, there is this possibility, but he himself can not be sure. The staff of the business department of the Shaanxi Provincial Environmental Monitoring Station said that whether it will come to China and the formation of acid rain that endangers human health is something that needs to be judged by integrating various factors, and it is inconvenient for the environmental department to make a judgment as far as the current information is concerned. According to the staff, the atmospheric monitoring data over Shaanxi are all in the monitoring stations of various cities for a period of time, and the main station has not yet been summarized.

However, such staff members also said that "this is not very likely". An unnamed professor in the Department of Environmental Science at Northwest University said in an interview with a reporter from China Business Network that the possibility of acid rain is very small. The professor said that he did not conduct sampling research and could only conduct a review and analysis at the macro level.

First of all, the total amount of ash emitted by Icelandic volcanoes is still very small relative to the entire atmospheric capacity. On the other hand, because it is far away from China, even if the volcanic ash can float over China, the concentration of harmful substances will be diluted after long-distance diffusion, and it will not have a harmful effect on the human body. Health experts: volcanic ash will not cause **cancer According to ** report, Zhang Tiankan, a well-known health expert, believes that the rumors on the Internet are an "April Fool's Day" farce.

He said that volcanic ash contains sulfides, but most of them only cause respiratory discomfort or infection, but from the epidemiological analysis, it has never been heard that it can cause cancer such as ** cancer, and volcanic ash is not directly related to cancer, and the news is insufficient. Oh.

The next few days will be clear and cloudy.

The rain we are familiar with is generally neutral, but there is a special kind of acidic rain, which is not only harmful to the human body, but also has great harm to agriculture, forestry and buildings, which is acid rain. The lower the pH value, the stronger the acidity, and the strong acid rain has been measured in Chongqing, China.

The main cause of acid rain is air pollution. Human production activities require the burning of coal and oil to provide heat energy, and these energy substances emit large amounts of sulfur dioxide and nitrogen oxides when burned. After these pollutants enter the atmosphere, a series of chemical reactions occur under the action of sunlight, water vapor and dust, forming fine particles of sulfuric acid, nitric acid or sulfate and nitrate, which are scattered in the air and fall when encountering precipitation, forming acid rain or acid snow.

At present, acid rain has become a recognized global environmental pollution problem. It will make the water of the lake acidic, which seriously endangers the living environment of aquatic animals; wilting trees and destroying forest vegetation; Changing soil structure, reducing soil fertility efficiency, and reducing crop yields; The materials of the building are corroded, and the ...... of cultural relics and monuments is seriously damagedTo solve this problem, we must optimize the energy mix, reduce pollutant emissions, and eliminate the harm of acid rain at its roots.

The cause of acid rain is a complex atmospheric chemical and atmospheric physical phenomenon. Acid rain contains a variety of inorganic and organic acids, most of which are sulfuric acid and nitric acid. The sulfur dioxide emitted from the combustion of coal in industrial production and civil life, the nitrogen oxides emitted from the combustion of petroleum and automobile exhaust gas, go through the "rain formation process in the clouds", that is, the water vapor condenses on the condensation nuclei such as sulfate and nitrate, and the liquid phase oxidation reaction occurs, forming sulfuric acid raindrops and nitric acid raindrops; It also goes through the "cloud scouring process", that is, the acid-containing raindrops continue to merge and adsorb other acid-containing raindrops and acid-containing gases in the process of descending, forming larger raindrops, and finally landing on the ground, forming acid rain.

Acid rain in our country is sulfuric acid rain.

Acid rain is mostly due to the combustion of fossil fuels

s→h2so4

S+O2 (ignition) SO2

SO2 + H2O H2SO3 (sulfurous acid).

2H2SO3+O2 2H2SO4 (sulfuric acid).

Total Chemical Reaction Equation:

S+O2 (ignition) SO2

2so2+2h2o+o2＝2h2so4

The oxides of nitrogen are dissolved in water to form acids:

Nitric acid) 2NO+O2 2NO2

3no2+h2o＝2hno3+no

Total Chemical Reaction Equation:

4no++2h2o+3o2＝4hno3

Total Chemical Reaction Equation:

4no2+2h2o+o2＝4hno3

When the sulfuric acid dioxide gas emitted from the coal-burning chimney or the nitrogen oxide flue gas emitted by the car rises to the sky, these acidic gases meet the water vapor in the sky, and sulfuric acid and nitric acid droplets are formed, which acidify the rainwater, and the rainwater that falls to the ground becomes acid rain. The burning of coal and oil is the main culprit of acid rain.

Chemical reaction process of acid rain formation:

1) Acid rain is partly carbon dioxide dissolved in rainfall.

CO2 + H2O H2CO3 (carbonic acid).

2) Acid rain is mostly due to the combustion of fossil fuels

S+O2 (ignition) SO2

SO2 + H2O H2SO3 (sulfurous acid).

2H2SO3+O2 2H2SO4 (sulfuric acid).

3) Nitrogen oxides dissolve in water to form acid: During thunderstorms and lightning, a small amount of nitrogen dioxide is often produced in the atmosphere.

N2 O2 (Lightning) = 2NO

2no+o2＝2no2

3NO2 + H2O = 2HNO3 (nitric acid) + NO(4) Acid rain reacts with marble:

CaCO3+H2SO3 CaSO3+H2O+CO2 CaSO3+SO2+H2O=Ca(HSO3)2(5) In addition, there are other acidic gases that are dissolved in water and cause acid rain.

A heavy industrial area with coal and oil as energy sources! Sulfuric acid rain is the main form in China, while nitric acid acid acid rain is used in Western countries.

According to the meteorological monitoring data in 2009, 96% of the precipitation in the urban area of Guangzhou is acidic, of which 77% of the precipitation is strong acid rain with a pH value less than that.

Conclusion: The Plant Physiology Laboratory of the College of Life Sciences of South China Agricultural University provided experimental equipment Chen Xuan assisted in the experiment, and Wang Heqi assisted in finding data and found that the rainfall measurement.

The average pH is.

It is indeed a strong acid rain.

But within the normal pH range of rainfall in Guangzhou.!

This information is a rumor, and it is completely implausible once in 750, and 77% of the rainfall in Guangzhou last year was around this pH.

Because most of the rainfall in Guangzhou is strong acid rain, which is harmful to the human body, it should be rained as little as possible at any time.

The rain under the Sichuan Basin is basically acid rain all the time, but it is just low, said the geography teacher of the first class.

Because human beings use a lot of fossil local liquid fuels, they produce a lot of carbon dioxide, and the rain is originally neutral, and there is a lot of carbon dioxide, and then it becomes acidic, and the pH is less than that, and the normal one should be close to 7, which is very bad for the environment, and similar to the greenhouse effect.

Acid rain refers to rain, snow, or other forms of precipitation with a pH less than that. [1] During the formation and fall of rain and snow, the silver wheel absorbs and dissolves sulfur dioxide, nitrogen oxides and other substances in the air, forming acidic precipitation with a pH below it. Acid rain is mainly caused by the anthropogenic release of large amounts of acidic substances into the atmosphere.

Acid rain in China is mainly formed by burning a large amount of coal with high sulfur content, mostly tung sulfate seepage rain, less nitrate rain, in addition, the exhaust gas emitted by various motor vehicles is also an important cause of acid rain. Some areas in China have become areas prone to acid rain, and the scope and extent of acid rain pollution have attracted people's close attention.

Forests eroded by acid rain.

What is Acid Rain? Distilled water is neutral and has no taste. lemon juice, orange juice has a sour taste; Vinegar has a greater sour taste, but they are both weak acids.

Baking soda has a slightly astringent alkaline taste; The caustic soda water is astringent and has a greater alkaline taste; Caustic soda (sodium hydroxide) is a base; Baking soda (sodium bicarbonate) is alkaline but belongs to the salt group. [2] Scientists have found that the size of the sour taste is related to the concentration of hydrogen ions in the aqueous solution; The alkaline smell is related to the concentration of hydroxide ions in the aqueous solution. Then an indicator is established: a negative value of the logarithm of the concentration of hydrogen ions, called pH.

Thus, the pH of pure water (distilled water) is 7; The more acidic, the lower the pH; The more alkaline, the higher the pH. Unpolluted rain and snow (pH is generally between 0-14) is neutral, with a pH close to 7; When the atmosphere is saturated with carbon dioxide, it is slightly acidic (water and carbon dioxide combine to form carbonic acid), and the rain with a pH of less than is called acid rain; Snow with a pH less than is called sour snow; The fog that pervades the high altitude mountains (such as Mount Emei) is called acid fog when the pH is less than that. There are several tools that can be used to test the pH of water:

Litmus reagent (phenolphthalein test solution) pH test paper (high accuracy, can test pH) pH meter (can measure more accurate pH).

A minimum of a few tens of minutes, a maximum of an hour and a half.