Fonseca, Bruna

Peralba, Maria do Carmo C. R.

Tavares, M. T.

Teixeira, Aline S.

Universidade do Minho: RepositoriUM

Book  of  Abstracts  of  the  10th  International  Chemical  and Biological Engineering Conference – CHEMPOR 2008 Integration of life sciences& engineering  919 Anthracene and lead adsorption on a Portuguese soil – competitive studies  Aline S. Teixeira1*, Bruna Fonseca1, Maria do Carmo C.R. Peralba2, Teresa Tavares1 1IBB-Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, University of Minho, 4710 - 057 Braga, Portugal 2Department of Inorganic Chemistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil  Key words: Anthracene, lead, soils, sorption isotherm   Abstract The environmental contamination by organic and inorganic chemicals has been, for a long time, one of the most common problems in soils and sediments.  Many organic chemicals, such as polycyclic aromatic hydrocarbons (HPAs) can persistent in soil environment for a long time (Sabljic, 2001). Due to the possibility of ring fusion at different positions, there are more than 100 HPAs that are recognized by IUPAC (Jacques et al., 2008).  Some inorganic elements like heavy metals are natural constituents of soils. Due to anthropogenic activities, significant changes occurred in the global account of these metals at the earth’s surface (Serrano et al., 2005). Anthracene and lead were selected as they can be found as co-contaminants in storm water (Lau and Stenstrom, 2005) or in petrochemical industries or oil refining products and waste. They can also result from incomplete combustion of organic substances as coal, oil, gas, wood and garbage (Jacques et al., 2007). Sorption is a key process controlling mobility, bioavailability, toxicity and fate of pollutants in soil (Chen, 2007). As a consequence, this study was conducted in order to assess the partitioning of anthracene and lead on a Portuguese soil, in single and competitive systems. A sample of a loamy sand soil was collected in Oporto, Portugal (41º25'15.58''N and 8º45'58.27''O) (Fonseca et al., 2008). Batch tests were performed in order to evaluate de adsorption kinetics and equilibria. For the equilibrium tests, single or multi solutions containing anthracene and/or lead with different concentrations, were prepared in 0.01 M CaCl2. Then they were added to 2 g of soil, and the systems were shaken at 100 rpm for 72 h, at room temperature. Kinetics was evaluated for contact times up to 72 h, after soil sample saturation and addition of stock solution. Lead concentration in the liquid phase was quantified by atomic absorption spectrometry (Spectra AA-400). After the addition of deuterated phenanthrene to the samples, anthracene was determined by gas chromatography – mass spectrometry (Varian 4000). The quantification of anthracene was performed using external standard calibration (Domine, 2007).  Kinetics and isotherm equations were fitted to experimental data in order to describe the adsorption process of the anthracene and lead, in competitive and non-competitive systems.   References Chen, D., Xing, B., Xie, W. (2007). Sorption of phenanthrene, naphthalene and o-xylene by soli organic matter fractions. Geoderma, 139, 329-335. Domine, F., Cincinelli, A., Bonnaud, E., Martellini, T., Picaud, S. (2007). Adsorption of phenanthrene on natural snow. Environ. Sci. Technol., 41, 6033-6038.                                                 * Corresponding author. Tel + 351‐932849611. E‐mail:teixeiraline@deb.uminho.pt Book  of  Abstracts  of  the  10th  International  Chemical  and Biological Engineering Conference – CHEMPOR 2008 Integration of life sciences& engineering  920 Fonseca, B., Maio, H., Quintelas, C., Tavares, T. (2007). Cr(VI) and Pb(II) adsorption on a Portuguese loamy sand soil. Sowetox Proceedings, Barcelona, Spain CD-rom. Jacques, R.J.S., Okeke, B., Bento, F.M., Peralba, M.C.R., Camargo, F.A.O. (2007). Characterization of a polycyclic aromatic hydrocarbon-degrading consortium from a petrochemical sludge landfarming site. Bioremediation Journal, 11(1), 1-11. Jacques, R.J.S., Okeke, B., Bento, F.M., Teixeira, A.S., Peralba, M.C.R., Camargo, F.A.O. (2008). Bioresource Technology, 99, 2637-2643. Lau, S., Stenstrom, M.K. (2005). Metals and HPAs adsorbed to street particles. Water Research, 39, 4083-4092. Sabljic, A. (2001). QSAR models for estimating properties of persistent organic pollutants required in evaluation of their environmental fate and risk. Chemosphere, 43, 363-375. Serrano, S., Garrido, F., Campbell, C.G., Garcia-Gonzalez, M.T. (2005). Competitive sorption of cadmium and lead in acid soils of Central Spain Geoderma, 124, 91-104.  

Anthracene and lead adsorption on a Portuguese soil : competitive studies

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Anthracene and lead adsorption on a Portuguese soil : competitive studies

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