Home electrolysis, or how to obtain alkaline water using ionisers

Electrolysis begins the process of creating ionised water. It occurs when voltage is applied to two electrodes and flows through electrolyte solutions.

Electrolysis occurs only in systems where there are substances with the ability to ionize, and thus to split into ions (cations and anions). Such electrolysis occurs in home ionizers. After applying electric current, water molecule (H2O) as well as salts dissolved in it, are broken apart. In general, ionizers contain a positive electrode (anode) and a negative electrode (cathode). Depending on what type of ioniser we have, there may be a different number of electrodes. Therefore, we should remember that there are two types of ionisers available: free-standing and flow-type (counter-top and under-counter) ionisers. Regardless of the type, both ones are characterised by the same effect that allows us to produce healthy ionised water – alkaline water to drink and acidic water to apply directly on our skin. What is different is just the impact of electricity on the water.

Free-standing ionisers look like electric kettles. In such ionisers, there are only two electrodes, one negative and one positive. The advantage of such ionisers is that we can move them wherever we want. In such devices, the production of ionised water takes a few minutes. There is a possibility to set various pH levels. This is what the working time of the ioniser depends on.

The structure of a free-standing ioniser is presented in the picture below:

Budowa jonizatora

However, in flow-type ionisers, the amount of electrodes varies. Usually there are 5,7 or 9 electrodes. This number determines the pH level of both alkaline and acidic water. In case of these ionisers, water is produced immediately. Flow-type ionisers can be divided into counter-top and under-counter devices. The former are mounted on the counter and perfectly match your kitchen due to their modern and unique design. The latter are installed in the sink cabinet, which makes them invisible. In both cases, these devices allow us to use ionised water immediately, since they are connected to the water tap. It’s worth mentioning that such ionisers are also equipped with water filtration systems in order to remove toxic compounds (heavy metals, fluorides, chloramines, etc.) from water. Some models also have a function which allows us to use the option of water filtration only. With such devices, scale will be less likely to accumulate at the bottom of the kettle while boiling water.

Water ionizer operating principle

After the ioniser is filled with water and electric power is switched on, electrolysis, or chemical separation of salts dissolved in the water, begins. Each salt contained in the water consists of alkaline and acidic parts. Metal ions and hydroxyl ions (OH) are accumulated around the negative cathode, whereas ions of acid residues and acid ions (H +) gather around the positive anode.

The diagram of water flow in the ioniser is illustrated below:

Schemat elektrolizy

Water electrolysis – is the division of water molecule H2O by direct current flowing through it. Two electrodes are used for this purpose. The negative one is a cathode K, and the positive one – anode A. During electrolysis, water molecules are split into positive acidic hydrogen ions (H+) and negative alkaline hydroxyl ions (OH-):

H2O = H+ + OH

The cathode attracts positive hydrogen ions, whereas the anode – negative hydroxyl ions. The same situation occurs with salts dissolved in the water.

It should be remembered that electrolysis occurs only in water containing metal salts. In case of distilled water or water from reverse osmosis systems, ionised water cannot be obtained. This is because both these types of water lack minerals (mineral salts). Of course, special mineralising filters can be used, but this is pointless. Electrolysis can be easily conducted by using normal tap water.

Water ioniser – small laboratory at home

In order to produce ionised water, electrolysis must be conducted. However, you don’t need to have access to a professionally equipped chemical laboratory. Just bet on advanced water ioniser – a small device allowing you to obtain ionised water at home.

With an ioniser, you can prepare the healthiest, clean and effective ionised water in a really short time. This is due to the special construction of the device, which acts as a miniature chemical laboratory. A free-standing ioniser designed to produce clean ionised water consists of:

  • The ioniser head with two built-in electrodes and a control panel,
  • The main vessel – into which the light electrode (cathode) is inserted, and
  • A removable vessel – into which the black electrode (anode) is inserted.

Electric current flowing through the water triggers the process of electrolysis, which results in the accumulation of hydroxyl ions around the cathode and hydrogen ions around the anode. Within a few minutes, alkaline water suitable for drinking will appear in the main vessel, and acidic water for external use – in the removable vessel. Some models also allow us to produce silver water known for its bactericidal properties.


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