Bamboo Charcoal Sticks (For Water Filtration)
Bamboo Charcoal Sticks are sold by the ounce and shipped in paper packaging.
1 ounce = about 3-4 pieces
1 ounce should last about 1 month
How to Use:
1. Rinse, boil for 5 minutes, and dry in the sun.
2. Add to a one-liter of tap water. We recommend 3 pieces per liter of water. Add more pieces for larger containers.
3. Let stand for 1 hour and drink! Your charcoal should last around 4 weeks depending on quality of your tap water. Add used bamboo charcoal to compost or garden.
Does it work?
Bamboo charcoal adsorbs tap water impurities as they attach to the porous surface area within the bamboo charcoal. Tests indicate that bamboo charcoal removes chlorine, chloride, phosphorus, ammonia, toluene (alcohol), nitrogen, chloramine (ammonia and chlorine compound added to water to kill pathogens), and even toxins like pesticides that can seep into tap water. Bamboo charcoal adsorbs solids and gases, but not pathogens, so we don't recommend relying on bamboo charcoal to filter creek water while hiking.
Compared to wooden charcoal, bamboo charcoal has high adsorptive power and contains many mineral components (especially potassium, calcium and silicic acid). The surface area of bamboo charcoal is 300 square meter per gram and the adsorption power is ten times that of wooden charcoal.
A test conducted by the Division of Forest Management (Kagoshima Prefecture, Japan) in 2004, found that the pH value of bamboo charcoal-purified water changes from acidic to alkaline when bamboo is carbonized at a high heat. The study found that the surface area for volatile organic compound (VOC) adsorption is maximized at 800 degrees Celsius, which is the heat that we use for carbonizing Miyabi Bamboo Charcoal. In addition, the study stated that the "best" carbonizing temperature for reducing residual chlorine in tap water was 800 degrees Celsius.