A review on adsorption of graphene oxide and its composites for heavy metal ions in water

Gr aphene ox ide has attr acted w idespread attent ion in wat er treatment field as a new nanomaterial. Because of its larg e specific surface area, abundant ox yg en2co nta ining functional g roups, ex cellent hy dr ophilia, and unique physical str ucture, it can adsor b heavy metal ions f rom w ater and its adso rption capacity is better than many kinds o f common adsorbents. H ow ever, its st ructur e and pr operty hav e limited its develo pment in w ater tr eat ment field. This pr oblem can be solv ed by combining gr aphene ox ide and other materials to form g raphene ox ide composit es. This review intro duces the str ucture and pr operty o f g raphene ox2 ide, its adso rption mechanism fo r heavy meta l io ns in wat er and the influence factors. At the same time, this review summarizes the adsor ption mechanism of g raphene ox ide composit es for heav y metal ions in w ater and its deso rption and reg ener atio n abili2 ties. In additio n, it summarizes and predicts the applicatio n po tential o f g raphene o xide and its compo sites as adso rbents to re2 mo ve heav y metal io ns from wat er.

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