What is residual chlorine and how harmful is residual chlorine? you know

1. What is the main way of disinfection and sterilization of tap water at present? Answer: China's current tap water purification method: chlorine gas sterilization; tap water purification method in developed countries and regions in the world: ultraviolet and ozone technology sterilization. 2. What is Chlorine? Answer: Chlorine gas is yellow-green, has a strong suffocating odor, and is poisonous. It is a strong oxidant, which can form phosgene in contact with carbon dioxide, which can be liquefied into liquid chlorine under high pressure, with a density of 2.48kg/m3, a melting point of -102°C, and a boiling point of -34.6°C. Soluble in water, alcohol and ether, its aqueous solution is called hydrochloric acid. Why is chlorine added to tap water? Answer: Tap water should be a kind of hygienic and safe drinking water, but due to environmental pollution, harmful substances such as bacteria in the water will grow in large numbers. In order to inhibit and kill the bacteria in the water, chlorine is added in the process of water treatment. What harm does tetrachloride do to the human body? Answer: Chlorine gas is seriously harmful to the human body. It can irritate the eyes, nose, throat and upper respiratory tract. It can cause acute pulmonary edema and pneumonia. When the concentration is high, it can paralyze the respiratory center and cause"lightning death". Long-term inhalation of low-concentration chlorine will cause chronic poisoning, resulting in a large number of free radicals in the body and accelerating the aging of the human body. The main symptoms are rhinitis, chronic bronchitis, emphysema, liver cirrhosis, atherosclerosis, and even cancer. When chlorine is added to water, it can dry out your hair, break it, split ends, bleach your skin, peel off layers of skin and produce itchy psoriasis allergies. When chlorine is heated, it reacts with organic decay in water to produce carcinogens such as chloroform. What is the effect of water containing residual chlorine on washing vegetables, fruits, grains, etc.? Answer: Chlorine will destroy nutrients such as vitamins and minerals in vegetables, fruits and grains, and seriously affect the absorption of nutrients by the human body. How does hexachlorine enter the human body? Answer: Chlorine used in tap water is easily and quickly absorbed by any oxidized surface with capillary pores such as skin, nostrils, mouth, lungs, hair, eyes, meat, vegetables, fruits and vegetables. Why is heptachlor easily absorbed through human skin? Answer: Because the surface of human skin is covered with pores and sweat glands, residual chlorine can easily enter through these tiny pores and be absorbed by human skin at the moment of contact with tap water. Eight long-term use of chlorine-containing water to bathe what harm? Answer: Take a bath with tap water containing residual chlorine. 40% of the total amount of chlorine in the bathroom is inhaled through the respiratory tract, and 30% is absorbed through the skin, which is 6-8 times the amount of chlorine that enters the human body through drinking. In mild cases, itching occurs. Over time, the cancer-causing rate will increase by 30% in middle age. Nine Why do you say that tap water is more harmful after it is boiled? Answer: Boil the tap water. After the chlorine is heated, it will react with organic decay in the water to produce carcinogens such as chloroform. The content of chloroform will increase by 3 to 4 times compared with tap water. If the residual chlorine cannot be removed, the coffee, tea or soup we drink every day will lead to the increase of carcinogens in our body after heating and boiling. What diseases can be caused by drinking water containing residual chlorine for a long time? A: Symptoms such as heart disease, coronary atherosclerosis, anemia, bladder cancer, liver cancer, rectal cancer, high blood pressure, and allergies. What is the harm of residual chlorine to children? Answer: When bathing children with tap water, chlorine can cause dryness, breakage and bifurcation of the hair, as well as bleaching of the skin, exfoliation of the skin layer, and extremely itchy psoriasis allergies. When chlorine interacts with organic matter, such as sweat, nitrogen trichloride is formed in the surrounding air, which can easily damage the eyes and throat. When chlorine is inhaled into the lungs through the airways, it damages the respiratory cells (Clara cells), which can lead to asthma and emphysema. What is the harm of twelve residual chlorine to pregnant women? Answer: Pregnant women drinking tap water containing chlorine for a long time will affect the growth of the fetal heart and lungs, which may lead to arrhythmia, heart failure, and lung dysfunction in newborns. What harm does thirteen residual chlorine do to the elderly? Answer: It can lead to atherosclerosis, heart failure, arteriosclerosis, heart disease, bladder cancer, liver cancer, rectal cancer, and high blood pressure.