Reuse of sustainable materials for xylenol orange dye and copper (II) ion ammoniacal removal

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:206

Article

Garrudo-Guirado, M. I.¹  Blanco-Flores, A.^2,3  Toledo-Jaldin, H. P.⁴  Sanchez-Mendieta, V.⁵  Vilchis-Nestor, A. R.⁵ 

[1] Univ Tecnol Jose Antonio Echeverria, Fac Ingn Quim, Calle 114,Entre 119 & 127, Havana 19390, Cuba

[2] Tecnol Estudios Super Tianguistenco, Div Ingn Mecan, Carretera Tenango La Marquesa Km 22, Santiago Tianguistenco 52650, Estado De Mexic, Mexico

[3] Univ Autonoma San Luis Potosi, Inst Met, Lomas Secc 2a, Ave Sierra Leona 550, San Luis Potosi 78210, Mexico

[4] Univ Autonoma Estado Mexico, Fac Quim, Paseo Colon & Tollocan S-N, Toluca 50180, Estado De Mexic, Mexico

[5] UAEM UNAM, Ctr Conjunto Invest Quim Sustentable, Carretera Toluca,Atlacomulco Km 14-5, Toluca 50000, Estado De Mexic, Mexico

关键词: Adsorption;    Vitreous tuff;    Solid waste;    Discontinuous systems;   

DOI  :  10.1016/j.jenvman.2017.11.074

来源: Elsevier

【 摘 要 】

Water pollution caused by heavy metals and organic compounds is an environmental problem with negative impact, making the restoration of water quality a priority. In this paper, the adsorption of xylenol orange dye (XO) on vitreous tuff mineral (VT) was studied. It was established that the adsorption capacity of VT was 45.17 mg/g. The removal was carried out by interactions between active sites on the surface of the material and the functional groups of the dye. The solid waste obtained from this process (VTXO) was reused as adsorbent material for Cu removal in the form of the complex Cu-NH3 because this process was done in an ammoniacal medium. It was found that the adsorption capacity of this new material was 33.09 mg/g. In a previous research, VT mineral was used to remove crystal violet (CV) instead of XO. The solid waste of this last process (VTCV) was also applied for Cu-NH3 removal, in order to compare the adsorption capacity of VT after the adsorption of two different kinds of dyes. The adsorption capacity of VTXO was lower than that of VTCV (71.23 mg/g). In both processes, adsorption kinetic was well described by a chemical adsorption onto a heterogeneous surface. The equilibrium time for XO removal was 50 min and 80 min for Cu-NH3. The experimental design stated that the maximum adsorption capacity was reached when the initial concentration was 6400 mg/L and the solid-liquid ratio was 10 g/L. The system that requires the least amount of adsorbent was the counter flow batch. Finally, it was possible to estimate the behavior of the system on a higher scale. This research provides an efficient and economical alternative to treat water contaminated with dyes and cooper in an ammoniacal medium using the same material in both processes, one after the other. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

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