Use "decolouration|decolourations" in a sentence

1. Carbon and activated carbon for decolouration, absorption, filtration and purification purposes

2. Carbon and activated carbon for decolouration, absorption, filtration and purification purposes for wastewater, water, gases and air flows

3. Activated carbon filters (parts of machines or engines) for decolouration, absorption, filtration and purification of liquids and gases