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@Article{ArceSoa┴viLunCar:2017:LeOpMi,
               author = "Arce, Gretta Larissa Aurora Ferrufino and Soares Neto, 
                         Tur{\'{\i}}bio Gomes and {\'A}vila, I. and Luna, Carlos M. R. 
                         and Carvalho J{\'u}nior, Jo{\~a}o A.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Estadual 
                         Paulista (UNESP)} and {Universidade Estadual Paulista (UNESP)} and 
                         {Universidade Estadual Paulista (UNESP)}",
                title = "Leaching optimization of mining wastes with lizardite and brucite 
                         contents for use in indirect mineral carbonation through the pH 
                         swing method",
              journal = "Journal of Cleaner Production",
                 year = "2017",
               volume = "141",
                pages = "1324--1336",
             keywords = "Brucite, Iron, Leaching, Lizardite, Mineral carbonation, Mining 
                         waste.",
             abstract = "This study investigated the leaching process in order to maximize 
                         Mg and Fe extraction and to produce amorphous silica (SiO2) with 
                         high purity. For this, a mining waste identified as S-GO was 
                         employed; which is a serpentinite rock with high lizardite 1T and 
                         native brucite contents. A Taguchi Experiment Design was used in 
                         order to assess the parameters that influence the leaching process 
                         such as: granulometry, hydrochloric acid concentration (HCl), 
                         leaching temperature, and mass/volume ratio. Furthermore, 
                         thermogravimetric analysis (TGA) was done to understand the 
                         interrelation between the mineral structure and leaching 
                         performance. Results show that lizardite 1T-bearing serpentinite 
                         presents a low content of tetrahedral Al3+ and high octahedral 
                         Fe3+ contents on S-GO. Native brucite delayed the formation of a 
                         hydrated silica layer and improved dissolution of serpentines. For 
                         this, Mg and Fe extractions are efficient, reaching 88 ▒ 2% of Mg 
                         and Fe extracted during the first 30 min of reaction, under mild 
                         process conditions: stoichiometric mass/volume ratio, 1M HCl 
                         concentration, pressure of 1 bar, temperature of 100 ░C, and 300 
                         \μm particle size. On the other hand, an excess of acid 
                         improves Mg and Fe extraction by only 10 ▒ 5% for S-GO. Such 
                         characteristics reduce energetic penalties and costs involved on 
                         indirect mineral carbonation processes by the pH swing method.",
                  doi = "10.1016/j.jclepro.2016.09.204",
                  url = "http://dx.doi.org/10.1016/j.jclepro.2016.09.204",
                 issn = "0959-6526",
             language = "en",
           targetfile = "gretta-leaching.pdf",
        urlaccessdate = "24 nov. 2020"
}


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