Production of tannin-based adsorbents and their use for arsenic uptake from water

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2018

Autores

H. A. M. Bacelo (Autor) Outra; Cidália Botelho (Autor) FEUP; S. C. R. Santos (Autor) Outra

Ata de Conferência Internacional

Título: WASTES - SOLUTIONS, TREATMENTS AND OPPORTUNITIES II

Páginas: 113-118

4th International Conference on Wastes - Solutions, Treatments and Opportunities

Univ Porto, Fac Engn, Porto, PORTUGAL, SEP 25-26, 2017

Indexação

ISI Web of Knowledge - 1 Citação

ISI Web of Science

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-00P-NK9

Abstract (EN): Tannins have been shown to be excellent candidates to produce biosorbents. These ubiquitous and inexpensive natural biopolymers are of easy extraction and conversion into insoluble matrices. Furthermore, it is somewhat easy to chemically modify a TBA (Tannin Based Adsorbent), in order to enhance its adsorption ability towards specific substances. In this work, a pine-tannin based adsorbent was modified with iron loading in order to assess its ability to uptake arsenic. Oxidation of the tannin gel prior to iron treatment was proven to be essential for the iron uptake. Moreover, the iron content of the tannin gel was shown to improve its affinity towards arsenic. It was achieved maximum adsorption capacities of 1.92 and 2.3 mg g(-1) of As(III) and As(V), respectively, at 20 degrees C and pH 3.5. Hence, the adsorbent here synthesized presents itself as a potential alternative for arsenic removal from aqueous solutions through adsorption.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6