... its raw material is coal 2.suitable for making face mask,respirator,and so on the raw material of activated carbon ... strong adsorption role.such as Benzenes,NHa,formaldehyde,VOC gas,set of filter dust,impurity particles and chemical adsorption dissociate the ... adsorption character,which is widely used in chemical industry,pharmacy,Paint,pesticides and other heavily polluting industries.also can be used ...