naa a22 4500 51074995X CHVBK 20180411083101.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11270-013-1599-9 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1599-9 Valuation of Unmodified Rice Husk Waste as an Eco-Friendly Sorbent to Remove Mercury: a Study Using Environmental Realistic Concentrations [Elektronische Daten] [Luciana Rocha, Cláudia Lopes, J. Borges, A. Duarte, E. Pereira] The present work explores the sorption capacity of an inexpensive and highly available agricultural waste, rice husk, to remove mercury using realistic concentrations of this metal. The efficiency of the process was evaluated for two initial Hg(II) concentrations, one representing the maximum value for Hg discharges from industrial sectors (0.05mgL−1), and the other ten times higher. A very small amount of rice husk (0.25 and 0.50gL−1) was able to reduce the Hg(II) levels in more than 80% for an initial concentration of 0.05mgL−1 and in more than 90% for 0.50mgL−1, corresponding to residual concentrations of Hg(II) of 0.048 and 0.009mgL−1, respectively. The biosorvent was reused in further cleaning treatments, maintaining the efficiency and high performance. The sorption kinetics of the Hg-rice husk system is well fitted by the Elovich model and the diffusion models suggested that, depending on the initial Hg(II) concentrations, the sorption process can be controlled by intraparticle diffusion or by both film and intraparticle diffusion. The equilibrium data are well described by the linear isotherm and the distribution coefficient found was 36.1Lg−1. Springer Science+Business Media Dordrecht, 2013 Mercury nationallicence Rice husk nationallicence Waste nationallicence Remediation nationallicence Contaminated waters nationallicence Rocha Luciana Department of Chemistry/CESAM, University of Aveiro, 3810-193, Aveiro, Portugal aut Lopes Cláudia Department of Chemistry/CESAM, University of Aveiro, 3810-193, Aveiro, Portugal aut Borges J. Álvaro Alves Borges, Lda, Alto Brenha-Brenha, 3080-437, Figueira da Foz, Portugal aut Duarte A. Department of Chemistry/CESAM, University of Aveiro, 3810-193, Aveiro, Portugal aut Pereira E. Department of Chemistry/CESAM, University of Aveiro, 3810-193, Aveiro, Portugal aut Water, Air, & Soil Pollution Springer Netherlands 224/7(2013-07-01), 1-18 0049-6979 224:7<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1599-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1599-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rocha Luciana Department of Chemistry/CESAM, University of Aveiro, 3810-193, Aveiro, Portugal aut NATIONALLICENCE 700 1- Lopes Cláudia Department of Chemistry/CESAM, University of Aveiro, 3810-193, Aveiro, Portugal aut NATIONALLICENCE 700 1- Borges J. Álvaro Alves Borges, Lda, Alto Brenha-Brenha, 3080-437, Figueira da Foz, Portugal aut NATIONALLICENCE 700 1- Duarte A. Department of Chemistry/CESAM, University of Aveiro, 3810-193, Aveiro, Portugal aut NATIONALLICENCE 700 1- Pereira E. Department of Chemistry/CESAM, University of Aveiro, 3810-193, Aveiro, Portugal aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/7(2013-07-01), 1-18 0049-6979 224:7<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer