Publicação: CASTOR LEAF POWDER AS A BIOSORBENT FOR Cu(II) REMOVAL AND PRECONCENTRATION OF NATURAL WATER SAMPLES
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Gh Asachi Technical Univ Iasi
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
This paper describes the preparation and use of a low cost biosorbent made of castor leaves for the extraction of Cu(II) from an aqueous medium. The biosorbent was characterized by Fourier transform infrared spectroscopy (FTIR), surface area and pore diameter measurements. The results showed absorption bands of carboxylic and amide groups at 1738 and 1540 cm(-1), respectively, and the measured surface area was 1.3728 +/- 0.0160 m(2) g(-1), with predominance of microporous < 10.51 A. Quantitative extraction was achieved at pH above 4 and kinetic equilibrium was reached within 10 minutes. Isotherm adsorption data were adjusted to a modified Langmuir equation, yielding a Ns value of 0.321 mmol g(-1). The continuous flow system showed, after the optimization parameters, a 47-fold enrichment factor (preconcentration factor) when applied to standard and real water samples (Parana River and Tap water). The developed preconcentration method was validated against the certified reference material (CRM 1643e).
Descrição
Palavras-chave
castor plant leaves, copper extraction, natural river water, preconcentration
Idioma
Inglês
Como citar
Environmental Engineering And Management Journal. Iasi: Gh Asachi Technical Univ Iasi, v. 17, n. 1, p. 165-173, 2018.
