Application of chemical precipitation, metallic exchange and Fenton´s reagent in photographic wastewaters treatment

Authors

  • Maria Crisitna Rizk UEM
  • Marcelino Luiz Gimenes UEM
  • Ervim Lenzi UEM

DOI:

https://doi.org/10.4025/actascitechnol.v29i1.82

Keywords:

remoção de prata, degradação da matéria orgânica, tratamento de efluentes, processos quí­micos, reagente Fenton

Abstract

Photographic, graphic and radiographic wastewaters contain, in its composition, silver and organic compounds that confer a high organic content. Those wastewaters are, commonly, treated for silver removal, but the organic matter also needs to be reduced, since the chemical oxygen demand (COD) is close to 120,000 mg O2 L-1.Therefore, the objective of this work is to study some processes capable of reducing the silver and COD photographic wastewaters concentrations. The precipitation with sodium sulfide (Na2S) and sodium chloride (NaCl), metallic replacement and advanced oxidation with Fenton´s reagent were studied The results showed that the Na2S precipitation and metallic replacement promoted the best silver removal, close to 100%, and the COD removal was around 10%. The experiments with NaCl did not promote satisfactory silver and COD removal and the Fenton´s reagent removed 40 and 70% of COD and silver concentrations, respectively.

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Author Biography

Maria Crisitna Rizk, UEM

Possui graduação em Engenharia Quí­mica pela Universidade Estadual de Maringá (2001) , especialização em Gestao da Qualidade em Alimentos pela Universidade Estadual de Londrina (2003) e mestrado em Engenharia Quí­mica pela Universidade Estadual de Maringá (2004) . Atualmente é Professor Substituto da Universidade Estadual Paulista "Júlio de Mesquita Filho". Tem experiência na área de Engenharia Quí­mica , com ênfase em Tecnologia Quí­mica. Atuando principalmente nos seguintes temas: Tratamento de resí­duos, Digestão anaeróbia, Biogás, Purificação de biogás. Currí­culo Lattes

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Published

2007-12-18

How to Cite

Rizk, M. C., Gimenes, M. L., & Lenzi, E. (2007). Application of chemical precipitation, metallic exchange and Fenton´s reagent in photographic wastewaters treatment. Acta Scientiarum. Technology, 29(1), 29–35. https://doi.org/10.4025/actascitechnol.v29i1.82

Issue

Vol. 29 No. 1 (2007)

Section

Chemical Engineering

License

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