Aminated cellulose as a versatile adsorbent for batch removal of As(V) and Cu(II) from mono- and multicomponent aqueous solutions

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:576

Article

Pereira, Amanda Raimundi¹  Soares, Liliane Catone¹  Teodoro, Filipe Simoes¹  Cota Elias, Megg Madonyk¹  Dias Ferreira, Gabriel Max¹  Leal Savedra, Ranylson Marcello²  Siqueira, Melissa Fabiola²  Martineau-Corcos, Charlotte⁴  Mendes da Silva, Luis Henrique³  Prim, Damien⁴  Alves Gurgel, Leandro Vinicius¹ 

[1] Univ Fed Ouro Preto, Inst Biol & Exact Sci ICEB, Dept Chem, Grp Phys Organ Chem GPOC, Campus Morro do Cruzeiro, BR-35400000 Ouro Preto, MG, Brazil

[2] Univ Fed Ouro Preto, Inst Biol & Exact Sci ICEB, Dept Phys, Grp Mol Simulat Mat MoISMat LabSimCo, Campus Morro do Cruzeiro, BR-35400000 Ouro Preto, MG, Brazil

[3] Univ Fed Vicosa, Dept Chem, Grp Colloidal & Macromol Green Chem, Av PH Rolfs S-N, BR-36570000 Vicosa, MG, Brazil

[4] Univ Versailles St Quentin En Yvelines, Inst Lavoisier Versailles UMR CNRS 8180, 45 Ave Etats Unis, F-78035 Versailles, France

关键词: Cellulose;    C-13 solid-state nuclear magnetic resonance;    Arsenic;    Copper;    Competitive adsorption;    Isothermal titration calorimetry;   

DOI  :  10.1016/j.jcis.2020.04.129

来源: Elsevier

【 摘 要 】

A bioadsorbent (CEDA) capable of adsorbing As(V) and Cu(II) simultaneously was prepared by tosylation of microcrystalline cellulose (MC) and nucleophilic substitution of the tosyl group by ethylenediamine. MC, tosyl cellulose, and CEDA were characterized by elemental C, H, N, and S analysis, infrared spectroscopy, and C-13 solid-state nuclear magnetic resonance spectroscopy. The adsorption of As(V) and Cu (II) on CEDA was evaluated as a function of solution pH, contact time, and initial solute concentration. The maximum adsorption capacities of CEDA for As(V) and Cu(II) were 1.62 and 1.09 mmol g(-1), respectively. The interactions of As(V) and Cu(II) with CEDA were elucidated using thermodynamic parameters, molecular quantum mechanics calculations, and experiments with ion exchange of Cd(II) by Cu(II), and As(V) by SO42. Adsorption enthalpies were determined as a function of surface coverage of the CEDA, using isothermal titration calorimetry, with Delta H-ads degrees values of -32.24 +/- 0.07 and -93 +/- 2 kJ mol(-1) obtained for As(V) and Cu(II), respectively. The potential to reuse CEDA was evaluated and the interference of other ions in the adsorption of As(V) and Cu(II) was investigated. Multi-component experiments showed that Cd(II), Co(II), Ni(II), and Pb(II) did not interfere in the adsorption of Cu(II), while SO42 inhibited As(V) adsorption. (C) 2020 Elsevier Inc. All rights reserved.

【 授权许可】

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