[Picture] The water electrolyzer places an electric field into the water and consists of positive and negative electrodes (iron rods and aluminum rods). After electricity is applied, positively charged + ions are released from the iron rods. It reacts with the negative electrolyte ions in the water to form water-insoluble metal clusters, and at the same time condenses and adsorbs colloids, organic matter, and inorganic matter in the water. And due to the action of electric current, metal particles originally dissolved in water, such as lead, arsenic, chromium, manganese, potassium, cobalt, etc., are reduced and gradually aggregate into metal clusters. Due to the different color rendering of different metal ions, colors are produced. of separation. So far, the known colors are as follows, for reference only:
Green: arsenic (arsenic), chloroform, tetrachloromethane, copper oxide, ferrous iron
Blue: bacteria, viruses, organophosphorus (fertilizers, detergents and pesticides), aluminum sulfate
Red: monovalent mercury, ferric iron
White: lead, zinc, mercury , asbestos, calcium, magnesium
Black: heavy metals (zinc, lead, mercury, copper, chromium, manganese, cadmium)
Yellow: dissolved oxygen, trace elements, organic minerals< /p>
Using water quality electrolyzers to turn tap water black and green, misleading consumers into thinking there is something wrong with the tap water. An electrolyzed water scam designed to promote water purifiers has gained notoriety in some cities. The reporter's investigation found that this kind of deception is currently tending to penetrate into rural areas. Recently, the Water Supply Company of Baoding City, Hebei Province has continued to receive consultation calls from rural residents in Gaoyang, Anxin and other counties in the city, asking whether there are problems with tap water. Relevant departments hope to use this newspaper to remind rural consumers to be wary of electrolyzed water scams.
Industrial and commercial officials told reporters that electrolysis of water is a trick used by unscrupulous traders to deceive people. The water quality electrolyzer has two sets of electrodes. Each set of electrodes consists of iron rods and aluminum rods. During the experiment, the electrodes were put into tap water and purified water respectively. After the electricity was turned on, the tap water began to become mixed and discolored, while the purified water did not change much. At this time, the scammer explained to the audience that these colored substances were harmful substances such as "pesticides", "viruses", and "heavy metals" to promote their water purifiers.
According to the water quality laboratory personnel of the water supply company, the calcium and magnesium plasma in tap water is an electrolyte. When the iron rod of the anode of the electrolyzer is placed in the tap water, the iron is electrolyzed to form ferric hydroxide (gray) and ferrous iron. ions (green), ferric oxide (reddish brown), ferric oxide (black); while purified water does not contain conductive calcium and magnesium ions, and no electrolysis reaction occurs, so purified water does not change color. If you experiment with mineral water, mineralized water or pure water with a little salt, the water will still change color.
In addition, some vendors use TDS meters to measure tap water and purified water. "TDS" is in English, and its meaning is total dissolved solids, that is, the total salts dissolved in water, so the meaning of "TDS" High or low does not represent the quality of water. [Picture] The reporter learned that due to market supervision by government departments and media exposure, electrolyzed water performers who have gradually gained notoriety in cities have moved their scams to remote counties and rural areas, mainly to older friends and people with lower education levels. Farmers explained that they take advantage of people's eagerness for health and low ability to detect scams to promote their products.
Yesterday, a Landside salesman came to sell a water purifier, which uses a water-quality electrolyzer to change the color of the water. He then claimed that tap water contains a lot of heavy metals and that for your health, please buy a water purifier. At first, I I also believed it. I checked online today and found out that this cannot prove the quality of the water at all. It can only prove that there are impurities in the water.
"Water quality electrolyzer" is actually an ordinary electrolysis device. Its usage principle is the same as that of electrolyzing water. similar. When electrolyzing water, after electricity is applied, the hydrogen ions in the solution are attracted by the cathode and move toward the cathode. They receive electrons at the cathode and are reduced, producing hydrogen gas. The hydroxide ions in the solution are attracted by the anode and move toward the anode. They lose electrons at the anode and are oxidized, producing oxygen. The anode of the "water electrolyzer" is an iron rod, and iron is more easily oxidized than hydroxide ions. The reaction at the anode continues to produce ferric iron, while the cathode continues to consume hydrogen ions. The hydroxide ions in the solution increase, and further react with the ferric iron ions produced at the anode to form iron hydroxide, which is the reddish-brown precipitate. . After chemical reactions between various metal ions and hydroxide ions, colored compounds are generated while bubbling. As we all know, divalent iron compounds are green and ferric iron compounds are reddish-brown
So why do you only get a light yellow solution when using purified water? Solutions can conduct electricity because there are ions in the solution that can move freely.
The greater the ion concentration, the stronger the conductivity. There are very few other ions in pure water, and the dissociation of water itself is very weak, so in the same experimental time, only a light yellow liquid is obtained, which is the color of ferric iron in the solution.
Therefore, the "water electrolyzer" experiment can only show that there are more ions in tap water than in pure water. Many trace elements in drinking water are also needed by the human body. Just because there are more ions in tap water, it does not mean that this water is polluted and harmful. While everyone is paying attention to water quality, don’t be fooled by the “water quality electrolyzer”