The idea behind using GAC as a filter for biological material is based on its porosity and surface properties. Molecules from viruses to macromolecules to polycellular organisms are able to be trapped by GAC. But using GAC with biological molecules supported on it can remove conventional pollutants; viruses can be immobilised via a GAC and metal combination.
In the second in a five part series on the applications of activated carbon, the use of activated carbon to sequester heavy metals is examined. Heavy metals, for example cadmium and lead, are notoriously difficult to remove from solution and there are serious consequences if these make their way into water courses, drinking water or the sea. Activated carbon is part of the solution.
The first in a five part series on the applications of activated carbon, desalination is discussed here. With certain parts of the world consistently suffering from a poor potable water supply, the concept of desalination is appealing. Contemporary methods for removing the salt from seawater are expensive and energy intensive. The use of activated carbon may help alleviate some of these concerns.
Desalination requires a lot of contaminants to be removed for it to be a viable process. Anthracite and process expanded clay can provide effective, long-term filtration solutions.
Magnetite is a common ore of iron, is the most magnetic of all the naturally occurring minerals in nature and has many uses and applications beyond the production of iron and steel.