Activated charcoal has traditionally been used for healing purposes for more than 3,000 years. It is a carbon based substance that is very porous with the ability to attract and bind toxins in water based environments. For this reason activated charcoal is used to aid in human health by detoxifying the body of harmful substances and relieving symptoms of nausea, gastrointestinal upset, inflammation and even reducing cholesterol.coal activated carbon pellets 
A recent chemical explosion in 2008 along the Songhua River in China contaminated the supplied drinking water for more than 10 million people in a city called Harbin. Significant quantities of the toxic chemical benzene was released in which the Chinese government acted quickly to filter the toxin from the water with activated charcoal. Successfully, the activated charcoal cleaned the benzene out of the river and prevented fatalities from contaminated drinking water.
Charcoal’s Remarkable Absorbency:
Lacking the presence of oxygen, charcoal is produced from exposing coconut husk or wood to high heat and burning it to produce millions of pores in the charcoal debris. Through Van der Waals forces or London dispersion forces, this activated substance is able to hold toxic debris and liquid.
In fact, activated charcoal can take in outside materials weighing more than 100 times its own weight. The inner surface of charcoal is about 200 to 300m2/g coal which approximates roughly into the area that spans a football field for every 2 grams of activated charcoal. When used properly, activated charcoal is a powerful detoxifier which can eliminate toxins not only from water but from the air and human body.
Notice the adjective used to describe activated charcoal. It is able to “adsorb” foreign materials as opposed to “absorb”. Sponges can absorb liquids and are then squeezed right back out. Substances which adsorb matter actually hold and bind the toxins at a molecular level within so that they are unable to escape. This interaction of impurities with the charcoal prevents their release.granular activated charcoal