Coagulation Coagulation is the process in which colloidal particles come together to form lager masses. Coagulation can be brought about by adding ions to neutralize the charges stabilizing the colloid. Ions with a high charge are particularly effective. Another example of ionic coagulation is in the formation of river deltas, which occurs when colloidal silt particles in rivers are coagulated by ions in sea water.
Heating is another way of coagulating certain colloids.
Coal Coal is a brown or black carbonaceous deposit derived from the accumulation and alteration of ancient vegetation, which originated largely in swamps or other moist environments. As the vegetation decomposed it formed layers of peat, which were subsequently buried. Under the increased pressure and the resulting higher temperatures the peat was transformed into coal. The by products of the production of coal gas are coal tar and Coke. Coal Tar Coal tar is a material obtained from the destructive distillation of coal in the production of coal gas.