Why the pH of water in the north is higher than in the south

Strictly speaking, the water in the south is soft and the water in the north is hard, and the main difference is that the south contains less minerals and the north contains more minerals.

The northern water is alkaline, so the pH is high.

The soil in the south has a higher iron content, so it is more acidic after flowing through the soil.

There are many reasons why one or two sentences are not clear, and it is best to ask a teacher or student.

1. Water quality differences:

Most of the water in the northern region is hard. It contains more calcium, magnesium and other minerals, and it is better to boil it before drinking it to avoid causing diarrhea (too good water quality can cause diarrhea).

The water sources in southern China are generally characterized by low turbidity, high algae, and micro-pollution.

Most of the water in the north is groundwater, and if it is boiled, it is still hard water and will not become soft water.

Most of the water in the south is in rivers and small rivers.

3. Different levels of pollution:

Compared with the south, the pollution turbidity of water sources in the north is low.

The average turbidity of water sources in 78 6 water sources in the south was below 50 ntu, the algae pollution in 63 6 water sources was serious, and the micro-pollution of water sources in 57 1 was gradually intensifying.

What is the difference between rural South and rural North?

The water in the north is the same as the water in the south, but when it comes to the mineral content of the water, it is different. The mineral composition of the water mainly comes from the mountains, the soil, the geology of the south and the north is different, the east and the west are different, whether it is groundwater, or above-ground water, most of them flow from west to east, the geology and soil in this process are different, so when you say the south and the north I contain different ingredients. If you go deeper, the ingredients in the water, including bacteria, beneficial and non-beneficial, as well as the pH of the water, etc.

The water in the south is large, so the water quality is relatively soft, and the water alkali contains less, which is different in the north, but the water in the north is also hundreds of meters underground, and the water is quite pure.

The northern region is very large, and the water in some places is not good (for example, some areas in Tianjin contain excessive fluoride), and some places have good water (for example, the groundwater near Yuquan Road in western Beijing is sweet and delicious), but most of the water in the northern region is hard water, which contains more calcium, magnesium and other minerals, and it is better to boil it before drinking, so as not to cause diarrhea (too good water quality can cause diarrhea). In addition, most of the water in the north is groundwater, and it is still hard water when boiled, and it will not become soft water.

The results show that the water sources in the southern region generally have the characteristics of low turbidity, high algae and micro-pollution According to statistics, the average turbidity of 78 6 water sources is below 50 ntu, 63 6 water sources are seriously polluted, and 57 1 water sources are gradually aggravated.

The main thing is water quality. The CA content of water quality in the north is relatively high, and the water quality in the south is relatively low, so the water quality in the north is commonly known as "hard", while the water quality in the south is "soft". Wash your face and hands with northern water, because of the large alkali content, it is rougher, while the southerners are more delicate.

Water is an indispensable substance in daily life and industrial and agricultural life. The quality of water quality directly affects human life and production. At present, much of the water used in the northern region is hard water, especially groundwater, which is very hard, which has a great impact on people's daily life and industrial and agricultural production.

Many industrial and agricultural sectors require soft water. In textile, printing and dyeing factories, hard water can cause stains on textiles when used to wash textiles, affecting the appearance and strength. Processing foods with hard water can cause protein precipitation and make it difficult to cook.

In winemaking, when the hardness of the water exceeds 4 °, the wine is cloudy and has a bad taste. Hard water also has an effect on pesticides, it will form precipitation with emulsifiers, reduce drug efficacy, and even produce pesticide damage.

Hard water also has a greater impact on the boiler. After the hard scale is formed in the boiler, the water in the boiler does not directly contact with the furnace wall, so that the heat can not be absorbed quickly, and the temperature of the furnace wall can reach more than 1000 degrees, and the appearance will form an oxide film that is easy to fall off, and serious oxidation corrosion will occur, resulting in a greatly shortened boiler life. In addition, when the scale is decomposed, a large amount of CO2 will be released, which will cause the scale to burst and fall off. When the furnace wall is at high temperature, once water seeps into the crack, the furnace wall is suddenly cooled down, and it is easy to burst.

Hard water also wastes fuel, and when the inner wall of the boiler is 1mm thick, it consumes 3%-5% more coal. In addition, hard water has an effect on the heat exchanger. In the exchanger pipeline, hard water will produce scale and obstruct the flow of water, and the heat exchange effect is poor and it is easy to produce corrosion under scale, pipe perforation, damage, material leakage and other adverse effects.

Hard water has a great impact on people's health. The survey found that people who drank mineral water for a long time found that they lived an average of three years longer than people living in similar conditions in the vicinity. However, it does not mean that the harder the water, the better, the relevant departments of the United States and Canada conducted a survey of people who drink soft water below 5 degrees all year round, and found that the cardiovascular mortality rate is as high as above.

Therefore, the relevant authorities in Canada stipulate that soft water cannot be used directly as drinking water. According to relevant information, it is best for people to drink water between 8 ° and 18 °, and not more than 25 °.

If hard water is drunk for a long time, it will lead to an increased incidence of kidney stones. Washing your face and bathing with hard water will form calcium and magnesium soap, which is sticky like gum and sticks to your face and dirt, making it difficult to get rid of dirt. The combination of calcium and magnesium ions in high-hardness water and sulfate will make the water produce a bitter and astringent taste, and will also make people's gastrointestinal dysfunction, such as temporary bloating, excessive gas, diarrhea and other phenomena.

The northern part of our country drinks groundwater with high hardness, so people who have lived in the south for a long time will have the so-called "water and soil adaptation" phenomenon at the beginning of the period of time in the north.

The water quality in the north is hard, and it takes a long time to drink, which is not very good for people's ** maintenance.

The water in the south is soft, so generally speaking, women in the south have a good skin tone and texture.

Of course, this is only a general situation, not absolute.

Water is soft water and hard water, and water that does not contain or contains a small amount of calcium and magnesium ions is called soft water, and vice versa is called hard water.