Why do water electrolyzers use two iron bars and two aluminum bars?

Working principle of water quality electrolyzer

The tester can not be used to evaluate the quality of mineral water, because when it is used to measure mineral water, minerals in the water may also have some chemical reactions with other pollutants in the water, which will bring misjudgment to users.

This instrument has positive and negative electrodes (one is an iron rod and the other is an aluminum rod), that is, two electrodes are introduced as electric fields. After the electrolyzer is electrified, under the action of current, the positive valence Fe3+ ions will be dissolved, and they will combine with the negative valence OH- ions in water to form water-insoluble Fe(OH)3 particles, which have strong coagulation and adsorption activities for colloidal particles in water, thus forming the adsorption and coagulation process for organic or inorganic substances in water.

At the same time, due to the action of current, metal particles, such as manganese, potassium and cobalt, which were originally dissolved in water, were reduced and gradually gathered to form metal clusters. Because the colors of different metal ions are different, color separation occurs.

Electrolytic water presents different colors, showing various impurities in the water.

Water electrolyzer

Yellow: dissolved acids, silicon compounds, organic minerals, molybdenum, silicon, fluoride and other organic substances; Green: arsenic, mercury, lead, copper and sodium.

Blue: bacteria, viruses, carcinogens, organophosphorus, etc. (fertilizers, detergents and pesticides).

Red: iron and rust, bacteria

White: lead, zinc, mercury, inorganic salt dirt.

Black: heavy metals (zinc, lead, copper, chromium, manganese, cadmium)

The water quality electrolyzer, also known as the solid precipitation accelerator, is a simple water quality detection method approved by the US Food and Drug Administration (F.D.A). It is used to basically determine the polluted water, which has important practical significance when it is necessary to check the purity of the water source, so that users can clearly and intuitively see the actual situation of their daily drinking water.