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carbon which could be produced from any carbonaceous material such as coal, lignite, wood, paddy husk, coir pith, coconut shell, etc. coconut shell is used for manufacturing activated carbon. coconut shell is carbonized by using pit, drum, destructive distillation method etc. uses shell based activated
carbon is extensively used in the process of refining and bleaching of vegetable oils and chemical solutions, water purification, recovery of solvents and other vapours, recovery of gold etc. it is used in gas masks and a wide range of filters for war gases and nuclear fall outs and for the removal...
http://www.hxcorp.com.vn/news/587-renewable-energy-activated-carbon-from-coconut-shell.html