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      Factores de mayor influencia en la adsorción de metales pesados por biomasa seca de Kluyveromyces Marxianus CCEBI 2011 Translated title: The most influential factors on the adsorption of heavy metals by dry biomass the K luyveromyces Marxianus CCEBI 2011

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          Abstract

          En este trabajo se determinaron los factores de mayor influencia sobre la capacidad de adsorción que tiene la biomasa seca de Kluyveromyces marxianus CCEBI 2011 sobre la eficiencia de remoción de cobre (II), zinc (II) y manganeso (II) presentes en las aguas de la Laguna Azul del Cobre de Santiago de Cuba . Para l os experimentos de adsorción se utilizaron 0,25 g .L -1 de biomasa, 3 niveles de pH (4,4; 5,0 y 6,2), así como 3 niveles de concentraciones de los metales cobre (II), zinc (II) y manganeso (II) y cinco tiempos de contacto (15, 30, 45, 60 y 90 min). Las concentraciones de los metales fueron determinadas por Espectroscopia ó ptica de e misión a tómica mediante Plasma de Acoplamiento Inductivo (ICP-AES) en el Laboratorio “Elio Trincado” de la Empresa Geominera Oriente. De los 3 niveles de pH estudiados, el de mejor comportamiento fue de 6,2. Los ensayos a las concentraciones estudiadas mostraron diferencias significativas en los porcentajes de remoción, evidenciándose un mejor comportamiento a concentraciones inferiores, obteniéndose para cobre (II), zinc (II) y manganeso (II) porcentajes de remoción de 74,0 %; 98,8 % y 55% en concentraciones de 25, 2 y 10 mg.L -1 , respectivamente. La biomasa seca de Kluyveromyces marxianus CCEBI 2011 fue capaz de remover en un 51,8, 22,7 y 13,6 % el cobre (II), zinc (II) y manganeso (II) respectivamente, presentes en aguas de la Laguna Azul del Cobre, valores de remoción inferiores a los logrados con soluciones sintéticas. Los resultados evidencian la influencia del pH en el proceso de adsorción.

          Translated abstract

          In this work, the most influential factors on the adsorption capacity of the dry biomass of Kluyveromyces marxianus CCEBI 2011 were determined on the removal efficiency of copper (II), zinc (II), and manganese (II) present in the waters of Laguna Azul del Cobre in Santiago de Cuba. Adsorption experiments used 0.25 gL -1 of biomass, 3 pH levels (4.4, 5.0 and 6.2), as well as 3 levels of copper (II), zinc metal concentrations (II) and manganese (II) and five contact times (15, 30, 45, 60 and 90 min). The concentrations of the metals were determined by ICP in the "Elio Trincado" Laboratory of the Geominera Oriente Company. Of the 3 pH levels studied, the one with the best performance was of 6.2. The tests at the studied concentrations showed significant differences in the percentages of removal, showed a better behavior at lower concentrations, obtaining for copper (II), zinc (II), and manganese (II) removal rates of 74,0 %; 98,8 % and 55% in concentrations of 25, 2 and 10 mg.L -1 , respectively. The dry biomass of Kluyveromyces marxianus CCEBI 2011 was able to remove by 52, 23 and 14% copper (II), zinc (II) and manganese (II) respectively, present in waters of the Laguna Azul del Cobre, removal values ??lower than those achieved with synthetic solutions. The results show the influence of pH in the adsorption process.

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          Interactions of metal ions with chitosan-based sorbents: a review

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            Biosorption of lead, copper and cadmium by biomass of Pseudomonas aeruginosa PU21

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              Biosorption of chromium, copper, manganese and zinc by Pseudomonas aeruginosa AT18 isolated from a site contaminated with petroleum.

              The study describes the sorption of Cr, Cu, Mn and Zn by Pseudomonas aeruginosa AT18 isolated from a site contaminated with petroleum and heavy metals. The concentrations studied were 50, 49, 60 and 70 (mg L(-1)) for Cr, Cu, Mn and Zn, respectively. The solution pH and ionic strength were very important factors in the metal biosorption performance and the biosorption capacity of P. aeruginosa AT18 for Cr3+,Cu2+, Mn2+ and Zn2+. In aqueous solution, the biosorption increased with increasing pH in the range 5.46-7.72. The results obtained in the experimental assays show that P. aeruginosa AT18 has the capacity for biosorption of the metallic ions Cr3+, Cu2+ and Zn2+ in solutions, although its capacity for the sorption of manganese is low (22.39 mg Mn2+/g of biomass) in comparison to the Cr3+, Cu2+ and Zn2+ ions, as shown by the individual analyses. However, 20% of the manganese was removed from an initial concentration of 49.0 mg L(-1), with a Qm value similar to that obtained in solutions containing mixtures of Cr3+, Cu2+, Mn2+and Zn2+. The chromium level sorbed by P. aeruginosa AT18 biomass was higher than that for Cu, Mn and Zn, with 100% removal in the pH range 7.00-7.72 and a Qm of 121.90-200.00 mg of Cr3+/g of biomass. The removal of Cr, Cu and Zn is also a result of precipitation processes.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rtq
                Tecnología Química
                RTQ
                Universidad de Oriente (Santiago de Cuba, , Cuba )
                2224-6185
                August 2018
                : 335-345
                Affiliations
                [04] orgnameUniversidad de Oriente, Santiago de Cuba orgdiv1Centro de Estudios de Biotecnología Industrial (CEBI)
                [01] Santiago de Cuba orgnameEmpresa GEOCUBA Oriente Sur magda@ 123456santiago.geocuba.cu
                [02] orgnameUniversidad de Oriente, Santiago de Cuba orgdiv1Facultad de Ingeniería Química y Agronomía (FIQA) Cuba
                [03] orgnameUniversidad de Oriente, Santiago de Cuba orgdiv1Facultad de Ciencias Naturales y Exactas (FCNE) Cuba
                Article
                S2224-61852018000200011
                fe6af815-42a3-44b4-b044-b098c5c19d4c

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : November 2017
                : March 2018
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 20, Pages: 11
                Product

                SciELO Cuba


                Laguna Azul del Cobre,Kluyveromyces marxianus,Bioadsorción,heavy metals,Bioadsorption,metales pesados

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