Nano composite material graphene oxide for heavy metal adsorption
Single layer graphene oxide thickness: thickness:0.8-1.5nm,Length:0.6-2um,
Graphene oxide is a kind of carbon nano material with similar structure to carbon nanotube.contrast to activated carbon, carbon nanotubes and graphene materials for low concentration wastewater containing lead adsorption ability, graphene oxide adsorption lead ability arrives 800 mg/g, far higher than that of activated carbon 60 to 120 mg/g. At the same time, graphene oxide has extremely strong regeneration, can repeat adsorption.
why does Graphene oxide have such a strong adsorption capacity to heavy metals? For two reasons: one is the graphene oxide is a single atomic layer thickness nanometer materials with the two-dimensional structure, the specific surface area is up to 2600 square metres per gram theoretically, of all the carbon nanotube it is the biggest; The second is that in the process of the preparation of graphene oxide, in its surface a large amount of active groups are formed such as carboxyl, carbonyl, hydroxyl, epoxy group, etc. Therefore,graphene oxide has the most basic elements of excellent adsorbent need : enough large specific surface area and high enough density of surface functional groups.
Use of nano graphene oxide materials can low the lead-acid battery industry wastewater emission concentration from 100-1000 ppb to 1-10 PPB, and lead recovery rate increased to 95% - 99%, lead environmental emissions lower to 90% than the existing technology. The reporter understands, the results can effectively promote the cadmium, nickel, arsenic, copper, chromium, radioactive elements and other heavy metal pollution system, has the very considerable economic benefits and social benefits.
