Sorption of pentachlorophenol on pine bark

• Tipo: Artigo em Revista Científica Internacional
• Data: 2005

Autores

Bras, I (Autor) Outra; Lemos, L (Autor) Outra; Alves, A (Autor) FEUP; Pereira, MFR (Autor) FEUP

Revista

Título: Chemosphere

Vol. 60

Páginas: 1095-1102

ISSN: 0045-6535

Editora: Elsevier

Indexação

ISI Web of Knowledge - 45 Citações

ISI Web of Science

Scopus - 55 Citações

COMPENDEX

Classificação Científica

FOS: Ciências exactas e naturais > Ciências da terra e ciências do ambiente

Outras Informações

ID Authenticus: P-000-20M

DOI: 10.1016/j.chemosphere.2004.12.064

Abstract (EN): The minimization of pentachlorophenol (PCP) transport in the environment driven by industrial wastewater discharges can be accomplished by sorption in natural, available and low cost by-products like pine bark. Taking into account that PCP is a chemical which behaviour is highly dominated by the surrounding features, this work intended to evaluate the sorption kinetics and equilibrium parameters according to the pH and temperature as well as the pine bark particle size. The PCP uptake by pine bark showed to be faster in the initial phase followed by a slower process, being 24 h the suitably time to reach the sorption equilibrium in the range of pH studied. The neutral PCP species showed to have higher binding capacity to pine bark than the anionic PCP, which was reflected in a decrease in the distribution coefficient (K-d) of the linear sorption isotherm with the increase of solution pH from 2 to 7. On the other hand, between 10 degrees C and 35 degrees C, the temperature does not seem to play a significant role in the PCP sorption by pine bark, while the sorbent size is a key parameter to enhance the overall process.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8