<b>Details of hydroxide ion utilization in the treatment of contaminated effluents with zinc</b> - doi: 10.4025/actascitechnol.v33i3.8379

Authors

  • Ervim Lenzi UEM
  • Vitor de Cinque Almeida UEM
  • Luzia Otilia Bortotti Favero UEM
  • Fernando Juliato Becker UEM

DOI:

https://doi.org/10.4025/actascitechnol.v33i3.8379

Keywords:

effluent treatment, heavy metal, zinc, hydroxide, lab effluent

Abstract

This work analyzed the treatment of effluent produced by an Atomic Absorption Spectrometer (AAS) containing the heavy metal zinc, utilizing the capacity of Zn2+ to react with hydroxide ion (HO-), forming Zn(OH) 2(ppt). The content was treated theoretically and experimentally. Theoretically, the thermodynamic parameters were assessed and the solubility of Zn(OH) 2(ppt) with pH variation was analyzed mathematically. Experimentally, the study analyzed the behavior of the Zn(OH) 2(ppt) aqueous solution and in natura solution of discarded effluent with the medium pH. The values of zinc concentration in the different situations were measured using AAS, flame modality, with detection limit (DL) 0.030 mg L-1. The results in the different situations of solution and medium pH for the minimum solubility of Zn(OH) 2(ppt), in mg L-1, were: theoretical value = 2.3; experimental value for the Zn(OH) 2(ppt) solution = 0.92; in natural effluent = 0.092, respectively. These values are in compliance with BRAZIL-Conama Resolution number 397/2008.

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Author Biographies

Ervim Lenzi, UEM

Dossui graduação em Quí­mica pela Universidade Federal de Santa Maria (1970), mestrado em Quí­mica (Quí­mica Analí­tica Inorgânica) pela Pontifí­cia Universidade Católica do Rio de Janeiro (1972) e doutorado em Quí­mica (Quí­mica Analí­tica Inorgânica) pela Pontifí­cia Universidade Católica do Rio de Janeiro (1980). Desde 1974 é professor da Universidade Estadual de Maringá - UEM. Em 1996 aposentou-se como Professor Titular da UEM. Prestou novo concurso na UEM reingressando como Professor Adjunto A. Atualmente é Professor Associado da Universidade Estadual de Maringá. Tem experiência na área de Quí­mica, com ênfase em Quí­mica Analí­tica, atuando principalmente nos seguintes temas: meio ambiente, metal pesado, poluição ambiental, poluição e solos Currí­culo Lattes

Vitor de Cinque Almeida, UEM

Profedssosr do Departamento de Quí­mica, Quí­mica analí­tica-ambiental

Luzia Otilia Bortotti Favero, UEM

Professora do Departamento de Quí­mica, área de Quí­mica analí­tica-ambiental

Fernando Juliato Becker, UEM

Acadêmico do Curso de Engenharia Quí­mica - Iniciação cientí­fica

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Published

2011-03-17

How to Cite

Lenzi, E., Almeida, V. de C., Favero, L. O. B., & Becker, F. J. (2011). <b>Details of hydroxide ion utilization in the treatment of contaminated effluents with zinc</b> - doi: 10.4025/actascitechnol.v33i3.8379. Acta Scientiarum. Technology, 33(3), 313–322. https://doi.org/10.4025/actascitechnol.v33i3.8379

Issue

Vol. 33 No. 3 (2011)

Section

Chemical Engineering

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