**2.1 Generation of ozone**

*Textile Industry and Environment*

processing of textiles is investigated.

4.New technologies in wet processing (enzymatic processes, ultrasound, ultraviolet, plasma and ozone technologies, dyeing in CO2-containing environment, etc.).

In this chapter, the use of ozone as some ecofriendly production method in wet

Ozone is a strong oxidant agent, which can be produced synthetically, as well as is being naturally available in the atmosphere. Ozone layer behaves like a shield against ultraviolet radiation. Because it absorbs UVB and UVC light during the cycle (**Figure 1**) of formation and destruction of ozone in the atmosphere

Christian Schönbein described "ozein" odor during electrolysis of water in 1839. Thomas Andrews found out that ozone was formed only by oxygen in 1856. In 1863, Soret defined the relationship between oxygen and ozone. He determined that 3 volumes of oxygen produce 2 volumes of ozone. Ozone is thermodynamically unstable and spontaneously reverts to oxygen (**Figure 2**). It dissolves very quickly in pure water and respects for Henry's law. Ozone immediately reacts with inorganic and organic substances dissolved in biological water generating a variety of

3.Reuse of water.

**2. Ozone**

[6–8].

free radicals [9, 10].

**14**

**Figure 2.**

**Figure 1.**

*Cycle of formation and destruction of ozone [8].*

*Ozone molecule [6, 11].*

Ozone must be generated "in situ" because it is very reactive gas and cannot be stored and transported to anywhere. So, it has to be generated [3]. The basic methods for generating ozone artificially are below [5–7, 9, 12–15]:

