Project: "water of love and
nostalgia," "how important water for life"
1. Water love and nostalgia
Most of us when he got home, the first thing is to drink water, after a friend to play, then after greeting, an invitation to drink water.
Water for daily activities such as a lover, like a nostalgia can not ever forget.
the family is difficult, the water boiled, the wealthy, the bottled water, or filtered water directly from tap water ...
It is a country " sweet ", the existence of humans and creatures, aquatic life, thanks to the country," sweet ", while the rest live in the country thanks to" salty "water" brackish "
2. The role of water for life
Water is extremely important role for all of us.
- For the human body in the country accounted for 70% at birth and decreased to 60% at maturity, 85% the volume of the brain is made up of water. In the body of water acts as a solvent for chemical reactions in the body occurs. Water transport nutritional elements to the whole body. Air temperature in the sweat glands ...
- For Earth
Many of us think that countries accounted for 3/4 of the earth body that area. Why do we have to worry about lack of water? But did you know that 3/4 or 75% of water which contains 97% is salt water in the ocean, which we could not be used for daily purposes. That's not to mention the 99.7% of the 3% fresh water exists as ice and snow.
So only 0.3% of the other 3/4 is fresh water that we can use for domestic purposes his being, a rate too low, and forces us to know how to use smart water or suffer water shortages, and other factors are making the depletion of water resources, hazardous to the left of the river ground.
3. Water and clean water state
's water resources are finite natural resources, this resource has become increasingly important as the earth becomes hotter, the risk of water shortage resulting from the process of climate change, which causes key personnel from the open water, using water for economic development of humankind.
water has also become the cause of many conflicts, was the main subject of many international conferences, as resources nations must be a global consensus protection.
water resources are becoming less and less, but every day we are still always make it less by the accidental or intentional in using wasteful water and water pollution.
the industrial revolution has increased the productivity of labor, but the backward production technology has discharged a large amount of waste water, waste gas, waste, has made many sources natural water pollution.
for the remaining 0.3% of water on Earth's surface, including:
- underground water wells:
It smells like rotten eggs is due to H2S gas, the result of the decomposition of organic material inside land and dissolve into groundwater, fishy smell of iron and manganese ..
- surface water (rivers, lakes):
Yes smell of algae is due to the presence of algae and microorganisms, water often green ..
- Tap water, also known as local aquatic water, water:
It smells chemical disinfection (chlorine) residual in the water.
- water filtered or bottled water called:
there may be different flavors, smells will cause discomfort when using water. Depending on the type of flavor that appropriate treatment, such as using insecticide algae in ponds, coagulation sedimentation filtration, activated carbon adsorption, ...
4. Domestic water users in Vietnam, and the self-protection measures.
4.1. RO water purification technology
Many years ago, RO water purification technology was introduced to Vietnam and become indispensable devices for many families.
However, according to experts of chemistry, this is not necessarily good for health health.
Prof. Tran Hong Con - Faculty of Chemistry - University of Natural Sciences in Hanoi - said the need to use water filters in Vietnam because of the large water sources contaminated and whether the treated water plant but due to the migration process water pipe breaks lead to the reverse osmosis chemicals affect health, including arsenic.
arsenic is also an element in the human body, but only a allowing small amounts. Arsenic is a natural capital of Earth's crust, can occur in water, vegetables, food and humans in trace concentrations. This is a highly toxic, toxic mercury 4 times.
When human infection may have adverse impact on the circulatory system, nervous system. A person infected with arsenic slowly, every day a little, depending on the level of physical fitness that can be hair loss, nausea, weight loss, cancer, memory loss ...
In addition, the water supply was contaminated iron and other metals. Therefore the water purifier manufacturers have launched many water filtration products. However, for RO water purifier has a drawback that the water purifier pure water as a form of distilled water.
RO reverse osmosis technology are quite common in our country today. Its mechanism of action is just passing through, the rest keep all metal ions, chemicals, fungal cysts, the thàn
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