caa a22 4500 445880821 CHVBK 20180317145542.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s00604-010-0531-x doi (NATIONALLICENCE)springer-10.1007/s00604-010-0531-x Comparative study of 17β-estradiol removal from aqueous solutions using pine bark and almond shell as adsorbents [Elektronische Daten] [Fernando Braga, Sandra Pinto, Maria Antunes] We have investigated the adsorption of the endocrine disruptor 17ß-estradiol (E2) on pine bark and almond shell. These traditional Portuguese agro-forestry by-products were milled, sieved into different particle size fractions and submitted to two different kinds of treatment. Adsorption experiments were conducted in batch system at room temperature and at pH 4.75 and 6.80, respectively, for pine bark and almond shell. E2 was more effectively adsorbed on 100 to 150μm particles of both sorbents. Pine bark washed with hot water and pine bark treated with formaldehyde showed higher percentage of adsorption than any other material tested at doses of 5.0g L−1. The adsorption was of comparable efficiency in case of almond shells at doses of around 20g L−1. In this case, the percentage of adsorption was found to be 88 and 90% for the sorbents treated with formaldehyde or washed with hot water. The adsorption isotherms were found to fit a Freundlich equation, with correlation coefficients (R2) between 0.904 and 0.998. The sorption coefficient (KF) ranged from 0.03 to 29.9 (mg1−1/n L1/n g−1). The differences observed among the adsorption capacities are discussed in terms of physico-chemical characterization of the materials. Figure (a) % adsorption as function of pine bark mass. pH = 4.75, [E2] = 1.0 mg L-1 for P(+), P(-), Pw(+) and Pt(+), [E2] = 3.0 mg L-1 for Pw(-) and Pt(-), solution volume: 50 mL, 25°C, contact time: 72 hours (b) % adsorption as function of almond shell mass. pH = 6.80, [E2] = 1.0 mg L -1 for all sorbents, solution volume: 50 mL, 25°C, contact time: 72 hours Springer-Verlag, 2010 17β-Estradiol nationallicence Adsorption nationallicence Pine bark nationallicence Almond shell nationallicence Braga Fernando Department of Chemistry and CQVR, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5001-801, Vila Real, Portugal aut Pinto Sandra Department of Chemistry and CQVR, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5001-801, Vila Real, Portugal aut Antunes Maria Department of Chemistry and CQVR, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5001-801, Vila Real, Portugal aut Microchimica Acta Springer Vienna 173/1-2(2011-04-01), 111-117 0026-3672 173:1-2<111 2011 173 604 https://doi.org/10.1007/s00604-010-0531-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-010-0531-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Braga Fernando Department of Chemistry and CQVR, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5001-801, Vila Real, Portugal aut NATIONALLICENCE 700 1- Pinto Sandra Department of Chemistry and CQVR, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5001-801, Vila Real, Portugal aut NATIONALLICENCE 700 1- Antunes Maria Department of Chemistry and CQVR, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5001-801, Vila Real, Portugal aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 173/1-2(2011-04-01), 111-117 0026-3672 173:1-2<111 2011 173 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer