Why does the water in the swimming pool have color？
The main reason for the color of pool water is that the color of the water appears under the reflection of large area at the bottom of the pool. That is to say, the depth of the color of the water color is proportional to the size and depth of the pool bottom area. Under the same concentration of color developing substances in the water, the color of the large pool or deep pool will be darker and darker than that of the small pool or shallow pool, just like the green pool The reasons for the color change of water are summarized as follows:
1 Bloom: when the pool water is under heavy load, chlorine or ozone and other disinfectants are busy destroying and decomposing the shed organic matter of swimmers, so they have no time to take into account the green algae spores brought by falling dust. When the growth conditions (light, temperature, carbon dioxide, fertilizer) are suitable, they immediately divide and grow in stages, resulting in the water turning green. For example, in the hot summer thunderstorm, the rain turns the nitrogen in the air into nitrate, the main fertilizer of green algae, and washes it into the swimming pool, which is a typical example of green algae flooding the pool.
2. The content of non-ferrous minerals in the water is too high: temperature, mineral water source, no consideration of heating cost, or newly injected swimming pool. Due to the large amount of water injected, the concentration of heavy metals such as iron, copper or manganese in the water is high. When chlorine or ozone are added, the oxidation state will be formed and the pool water will have a strange color. In addition, if copper sulfate, aluminum sulfate or polyaluminum chloride are used, it is easy to form opaque blue such as copper hydroxide and copper carbonate or milky white such as aluminum hydroxide because the total alkalinity is not properly controlled.
3. Ejecta from the screening program: the contaminated particles in the pool water are accumulated and concentrated by the screening program, causing the displacement and loosening of the filter layer under certain specific factors, so that the dirt originally captured by the filter material penetrates through the filter layer to form dark green or black water to drag leakage and eject.
4. Primary color of disinfectant: chlorine in disinfectant is yellow green, and its molecular weight is low, so it is not easy to color in pool water, while bromine is reddish brown with high molecular weight, which is easy to appear dark green under the reflection and multiplication of pool water area. In addition, chlorine dioxide, because of its strong fluorescence yellow, is easy to produce local or whole pool yellow green water color. 5. Chlorine deficiency: when the pool water is under heavy load, the CT value of chlorine chemistry can not reflect the chlorine demand condition of the pool water immediately. When the oxidation-reduction potential (ORP) of the pool water drops rapidly to below 600 MV, the organic matter in the pool water will appear turbid due to emulsification. The composition of the colored pool water can be roughly distinguished as follows: brown water: dissolved metal iron. Blue green water: dissolves copper. Brown and manganese: dissolved black metal. Blue and white water: dissolve copper and aluminum. Green water: dissolves metals, copper, iron, green algae or chlorine dioxide. Black water: dissolves manganese metal or ejecta from screening program. White water: dissolve aluminum or lack chlorine.
According to the cost conditions supplemented with enzyme clarifier as the water saving program, the instructions are as follows:
● C: CL. The content of free residual chlorine was controlled. The DPD red test was used to replace the Oto yellow test to ensure that the free residual chlorine content in the pool water was more than 1.0 ppm.
●O：ORP。 If the potential of chlorine reduction is above 650mv, there is no need to control the oxidation potential of water.
●S：SI。 The water quality balance index is controlled to keep the positive orientation of the water quality balance index in the pool water to ensure that the total alkalinity in the water is more than 100ppm, so that the positive positioning of Si value is clear.
●T：TOR。 The circulation rate of pool water should be controlled to keep the loop filtration hardware in effective operation, so as to ensure that the best chemical conditions are carried out under the best physical filtration conditions.
Enzyme clarifier: assist the physical filter program to modify the over stable condition of the filter material to ensure the filtration efficiency; when the light irradiates the swimming pool water containing suspended solids in the water, the light will produce dispersion due to the reflected light beam between the particles, which will cause turbidity and coloration of the pool water. The reason why colored suspended particles are suspended in water is that they have the same electric charge and repel each other. They can neither settle down nor squeeze with the filter medium, so that they can not be removed by filtration, which is the so-called over stabilization.
In water treatment chemistry, there is a drug called stabilizer, commonly known as flocculant, which is used in swimming places It is called water purification project Cloacase clarifier is a more efficient natural clarifier developed for the special water quality of swimming pool. It is used to replace aluminum coagulant and polymer flocculant. It will not cause depression in the process of treatment. It has the characteristics of decomposability, fast speed and good effect. It can remove the strange color of pool water within 1.5 cycles of pool water and restore the pool water The restoration has bright blue.
2. Flotation: because of the characteristics of the water treatment massage pool, such as high water temperature, body fat and impact bubbles, the floating agent has the ability of bubble catching, and the Flotation (floating) principle can be achieved through the impact bubbles. The coloring matter such as grease and iron can be condensed to the surface of the water, and then cleaned by the water surface cleaner or the leaf net, in addition to the function of removing foam oil. It can improve the efficiency of the red, yellow, green and black colors of the pool water within an hour.
3. Emergency treatment of water quality balance: one of the main reasons for the strange color of the pond water, such as green, yellow, brown or black, is the high content of soluble chromogenic minerals in the water. When oxidizing bactericides such as chlorine or ozone are added at high total alkalinity, the oxidation of dissolved minerals will occur at the remote positive end of water quality balance, which will lead to the color of pool water.
According to the chemical behavior characteristics of water quality and the principle of water quality balance, cloba shuishen green water first aid agent can eliminate the color of pool water when it crosses the zero point of water quality balance and tends to the remote negative end. The chemical reaction color elimination mode of chlorba shuishen green water first aid agent is fast, convenient and effective. There is no sedimentation and complex chemical adjustment. The color development and elimination speed of the pool water can be completed within 10 minutes.
