@Article{VieiraArLuFaCaSoÁv:2022:UnAcDi,
               author = "Vieira, Kely R. M. and Arce, G. L. A. F. and Luna, C. M. R. and 
                         Facio, V. O. and Carvalho J{\'u}nior, J. A. and Soares Neto, 
                         Tur{\'{\i}}bio Gomes and {\'A}vila, I.",
          affiliation = "{Universidade Estadual Paulista (UNESP)} and {Universidade 
                         Estadual Paulista (UNESP)} and {Universidade Estadual Paulista 
                         (UNESP)} and {Universidade Estadual Paulista (UNESP)} and 
                         {Universidade Estadual Paulista (UNESP)} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)} and {Universidade Estadual Paulista 
                         (UNESP)}",
                title = "Understanding the acid dissolution of Serpentinites (Tailings and 
                         waste rock) for use in indirect mineral carbonation",
              journal = "South African Journal of Chemical Engineering",
                 year = "2022",
               volume = "40",
                pages = "154--164",
                month = "Apr.",
             keywords = "Dissolution, Mineral carbonation, Serpentinite, Taguchi, Tailings, 
                         Waste rock.",
             abstract = "Solid carbonates can be formed by indirect mineral carbonation 
                         using the pH swing method for CO2 storage. It occurs at low 
                         temperatures and pressures in four stages: acid dissolution, 
                         purification, carbonation, and recovery. Although acid dissolution 
                         requires short reaction time that favors the extraction of 
                         reactive metals, lack of knowledge about the effects of 
                         temperature, acid concentration and particle size on metal 
                         extraction reveals that it is a critical stage of indirect mineral 
                         carbonation. In order to employ mining waste for indirect mineral 
                         carbonation, acid dissolution of serpentinites, tailings (SERP-GO) 
                         and waste rock (SERP-MG) were investigated, and their performances 
                         were compared. A Taguchi experiment design was used to assess the 
                         parameters that influence the acid dissolution process. 
                         Hydrochloric acid was used in acid dissolution for Mg and Fe 
                         extraction from both, SERP-GO and SERP-MG, and the process 
                         parameters (temperature, acid concentration, particle size and 
                         excess acid) were evaluated for 2 h of reaction. According to 
                         signal-to-noise ratio analysis of the Taguchi method, the 
                         optimized condition for Mg extraction of both samples was at 70 
                         °C, 4 M HCl, 69 \μm and twice the excess acid. The results 
                         indicated that of Mg and Fe extraction from de samples was more 
                         efficient for SERP-GO (71% and 85%) than SERP-MG (33% and 31%). 
                         Based on these findings, it was possible to have a better 
                         understanding of the factors affecting the dissolution of 
                         serpentinite tailings, to develop a more effective process for the 
                         use of mining waste in the indirect mineral carbonation process.",
                  doi = "10.1016/j.sajce.2022.02.005",
                  url = "http://dx.doi.org/10.1016/j.sajce.2022.02.005",
                 issn = "1026-9185",
             language = "en",
           targetfile = "vieira_2022_understanding.pdf",
        urlaccessdate = "29 jun. 2024"
}