Preparation of macroscopic spherical porous carbons@carboxymethylcellulose sodium gel beads and application for removal of tetracycline. Issue 87 (6th September 2016)

• Record Type: Journal Article
• Authors: He, Jinsong; Dai, Jiangdong; Xie, Atian; Tian, Sujun; Chang, Zhongshuai; Yan, Yongsheng; Huo, Pengwei
• Is Part Of: RSC advances. Volume 6:Issue 87(2016)
• Page Start: 84536
• Page End: 84546
• Publication Date: 2016-09-06
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra14877h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : We report a new convenient macroscopic granular adsorbent for the removal of tetracycline from water by immobilizing porous carbons into carboxymethylcellulose sodium gel beads. Abstract : The development of practicable and retrievable adsorbents with high adsorption capacity is a technical imperative for water treatment. Herein, we reported a new convenient macroscopic granular adsorbent for the removal of tetracycline (TC) from water by immobilizing porous carbons (PCs) which were obtained via one-step in situ pyrolysis from ethylenediaminetetraacetic acid dipotassium salt dihydrate (EDTA-2K·2H2 O) into carboxymethylcellulose sodium (CMCS) gel beads utilising molecular cross-linking. A remarkable similarity can be observed between multivariant gel beads and EDTA-2K·2H2 O derived porous carbons (EPCs) according to the characterization results. The adsorption performance was evaluated using batch adsorption studies of TC in aqueous solution: the kinetic results could be fit well by a pseudo-second-order model and intraparticle diffusion was treated as the rate-controlling step; equilibrium adsorption data fitted well to the Langmuir adsorption isotherm yielding a maximum adsorption capacity of 136.9 mg g −1 at 298 K. Importantly, these results indicate that the as-prepared gel beads could be used as facile adsorbents in pharmaceutical wastewater treatment.