Hydrogen sulphide is a gas which readily disolves in water. When released by say turning on tap the disolved gas escapes from the water to become a gas again. The first indication of the presence of Hydrogen sulphide is the noxious odour. In most cases Hydroge...
The two main types of filters work either on the principle of surface, or depth. Surface (screen ) filtration uses a straining technique similar to a sieve, whereby anything small enough to pass through the screen does, while larger items are trapped on the su...
The Earth has been filtering water naturally through the Hydrologic cycle since rainfall began. The continuous cycle whereby water falls from the sky in the form of rainfall, through percolation where the water passes through the soil and substrate to join the...
