What is lead?

by wfnblog on April 5, 2012

Atomic number 82 on the periodic table, lead is represented by “Pb” in the list of elements. Lead is a soft metal used in construction of buildings, manufacture of weights and various other industrial applications. Humans have been mining and using this heavy metal for thousands of years, poisoning themselves in the process. Although lead […]


What is chlorine?

by wfnblog on March 29, 2012

Atomic number 17 on the periodic table, chlorine is a naturally occurring element that is used extensively as a disinfectant in public water treatment plants to eliminate bacteria. Chlorine has been added to disinfect drinking water since the early twentieth century, making it possible to minimize more effectively the spread of waterborne diseases. Chlorine works […]


What is sediment?

by wfnblog on March 23, 2012

One simple definition of sediment is matter suspended in a liquid that will (given time) settle to the bottom. It is naturally occurring material that is broken down by weathering and erosion, and then transported elsewhere by various forces–in our case, water. It ranges from very fine silt through sand and dirt, and includes gravel, […]


What is a micron?

by wfnblog on March 14, 2012

Astoundingly, a micron (short for micrometer) is one-millionth of a meter. As such, it is also one thousand times smaller than a millimeter. Particles on this scale usually can’t be seen with your eyes. For example, the diameter of a human hair, which averages 75 microns wide, is very hard to discern without the use […]