A lignosulfonate-modified graphene hydrogel with ultrahigh adsorption capacity for Pb(ii) removal. Issue 30 (13th July 2016)

• Record Type: Journal Article
• Authors: Li, Fengfeng; Wang, Xiluan; Yuan, Tongqi; Sun, Runcang
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 30(2016)
• Page Start: 11888
• Page End: 11896
• Publication Date: 2016-07-13
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta03779h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A high capacity, low cost, eco-friendly and recyclable adsorbent, a lignosulfonate-modified graphene hydrogel, is successfully synthesized via a one-step method. Abstract : A lignosulfonate-modified graphene hydrogel (LS-GH) for Pb(ii ) adsorption was synthesized through a one-step method. The three-dimensional (3D) porous architecture of the graphene hydrogel was functionalized by using lignosulfonate with diverse oxygen containing groups. Benefiting from a large specific surface area, multiple porosity and sufficient active sites, the LS-GH adsorbent exhibited ultrahigh adsorption capacity (1210 mg g −1 ) for Pb(ii ) removal, which was among the highest of previously reported Pb(ii ) adsorbents. Importantly, the free-standing and flexible LS-GH can be used as a column-packed device, providing an efficient pathway for the fast removal of Pb(ii ) with an ultrahigh adsorption capacity of 1308 mg g −1 within 40 min. The high capacity LS-GH adsorbent is low cost, eco-friendly and recyclable, which could be an attractive adsorbent for the purification of wastewater on a large scale.