Metal-Induced Production of a Novel Bioadsorbent Exopolysaccharide in a Native Rhodotorula mucilaginosa from the Mexican Northeastern Region
There is a current need to develop low-cost strategies to degrade and eliminate industrially used colorants discharged into the environment. Colorants discharged into natural water streams pose various threats, including: toxicity, degradation of aesthetics and inhibiting sunlight penetration int...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science
2016
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| Online Access: | http://eprints.uanl.mx/14841/1/57.pdf |
| _version_ | 1824414159557623808 |
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| author | González Garza y Barrón, María Teresa Barboza Pérez, Daniel Vázquez Rodríguez, Augusto García Gutiérrez, Domingo Ixcóatl Zárate Kalfópulos, Xristo Cantú Cárdenas, María Elena Urraca Botello, Ludwing Ilytch Lopez Chuken, Ulrico Javier Trevino Torres, Alberto Ludovico Cerino Córdova, Felipe de Jesús Medina Ruiz, Pavel Villarreal Chiu, Juan Francisco Morones Ramírez, José Rubén |
| author_facet | González Garza y Barrón, María Teresa Barboza Pérez, Daniel Vázquez Rodríguez, Augusto García Gutiérrez, Domingo Ixcóatl Zárate Kalfópulos, Xristo Cantú Cárdenas, María Elena Urraca Botello, Ludwing Ilytch Lopez Chuken, Ulrico Javier Trevino Torres, Alberto Ludovico Cerino Córdova, Felipe de Jesús Medina Ruiz, Pavel Villarreal Chiu, Juan Francisco Morones Ramírez, José Rubén |
| author_sort | González Garza y Barrón, María Teresa |
| collection | Repositorio Institucional |
| description | There is a current need to develop low-cost strategies to degrade and eliminate industrially
used colorants discharged into the environment. Colorants discharged into natural water
streams pose various threats, including: toxicity, degradation of aesthetics and inhibiting
sunlight penetration into aquatic ecosystems. Dyes and colorants usually have complex aromatic
molecular structures, which make them very stable and difficult to degrade and eliminate
by conventional water treatment systems. The results in this work demonstrated that
heavy metal-resistant Rhodotorula mucilaginosa strain UANL-001L isolated from the northeast
region of Mexico produce an exopolysaccharide (EPS), during growth, which has colorant
adsorption potential. The EPS produced was purified by precipitation and dialysis and
was then physically and chemically characterized by Scanning Electron Microscopy, Fourier
Transform Infrared Spectroscopy, and chemical elemental analysis. Here, the ability of the
purified EPS produced to adsorb methylene blue (MB), which served as a model colorant, is
studied. MB adsorption by the EPS is found to follow Langmuir Adsorption Isotherm kinetics
at 25°C. Further, by calculating the Langmuir constant the adsorption capabilities of the EPS
produced by the Rhodotorula mucilaginosa strain UANL-001L is compared to that of other
adsorbents, both, microbially produced and from agroindustrial waste. The total adsorption
capacity of the EPS, from the Rhodotorula mucilaginosa strain UANL-001L, was found to be
two-fold greater than the best bioadsorbents reported in the literature. Finally, apart from
determining which heavy metals stimulated EPS production in the strain, the optimal conditions
of pH, heavy metal concentration, and rate of agitation of the growing culture for EPS production, was determined. The EPS reported here has the potential of aiding in the efficient
removal of colorants both in water treatment plants and in situ in natural water streams. |
| format | Article |
| id | eprints-14841 |
| institution | UANL |
| language | English |
| publishDate | 2016 |
| publisher | Public Library of Science |
| record_format | eprints |
| spelling | eprints-148412024-03-06T18:46:34Z http://eprints.uanl.mx/14841/ Metal-Induced Production of a Novel Bioadsorbent Exopolysaccharide in a Native Rhodotorula mucilaginosa from the Mexican Northeastern Region González Garza y Barrón, María Teresa Barboza Pérez, Daniel Vázquez Rodríguez, Augusto García Gutiérrez, Domingo Ixcóatl Zárate Kalfópulos, Xristo Cantú Cárdenas, María Elena Urraca Botello, Ludwing Ilytch Lopez Chuken, Ulrico Javier Trevino Torres, Alberto Ludovico Cerino Córdova, Felipe de Jesús Medina Ruiz, Pavel Villarreal Chiu, Juan Francisco Morones Ramírez, José Rubén There is a current need to develop low-cost strategies to degrade and eliminate industrially used colorants discharged into the environment. Colorants discharged into natural water streams pose various threats, including: toxicity, degradation of aesthetics and inhibiting sunlight penetration into aquatic ecosystems. Dyes and colorants usually have complex aromatic molecular structures, which make them very stable and difficult to degrade and eliminate by conventional water treatment systems. The results in this work demonstrated that heavy metal-resistant Rhodotorula mucilaginosa strain UANL-001L isolated from the northeast region of Mexico produce an exopolysaccharide (EPS), during growth, which has colorant adsorption potential. The EPS produced was purified by precipitation and dialysis and was then physically and chemically characterized by Scanning Electron Microscopy, Fourier Transform Infrared Spectroscopy, and chemical elemental analysis. Here, the ability of the purified EPS produced to adsorb methylene blue (MB), which served as a model colorant, is studied. MB adsorption by the EPS is found to follow Langmuir Adsorption Isotherm kinetics at 25°C. Further, by calculating the Langmuir constant the adsorption capabilities of the EPS produced by the Rhodotorula mucilaginosa strain UANL-001L is compared to that of other adsorbents, both, microbially produced and from agroindustrial waste. The total adsorption capacity of the EPS, from the Rhodotorula mucilaginosa strain UANL-001L, was found to be two-fold greater than the best bioadsorbents reported in the literature. Finally, apart from determining which heavy metals stimulated EPS production in the strain, the optimal conditions of pH, heavy metal concentration, and rate of agitation of the growing culture for EPS production, was determined. The EPS reported here has the potential of aiding in the efficient removal of colorants both in water treatment plants and in situ in natural water streams. Public Library of Science 2016 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/14841/1/57.pdf http://eprints.uanl.mx/14841/1.haspreviewThumbnailVersion/57.pdf González Garza y Barrón, María Teresa y Barboza Pérez, Daniel y Vázquez Rodríguez, Augusto y García Gutiérrez, Domingo Ixcóatl y Zárate Kalfópulos, Xristo y Cantú Cárdenas, María Elena y Urraca Botello, Ludwing Ilytch y Lopez Chuken, Ulrico Javier y Trevino Torres, Alberto Ludovico y Cerino Córdova, Felipe de Jesús y Medina Ruiz, Pavel y Villarreal Chiu, Juan Francisco y Morones Ramírez, José Rubén (2016) Metal-Induced Production of a Novel Bioadsorbent Exopolysaccharide in a Native Rhodotorula mucilaginosa from the Mexican Northeastern Region. PloS one, 11 (2). ISSN 1932-6203 doi:10.1371/journal.pone.0148430 |
| spellingShingle | González Garza y Barrón, María Teresa Barboza Pérez, Daniel Vázquez Rodríguez, Augusto García Gutiérrez, Domingo Ixcóatl Zárate Kalfópulos, Xristo Cantú Cárdenas, María Elena Urraca Botello, Ludwing Ilytch Lopez Chuken, Ulrico Javier Trevino Torres, Alberto Ludovico Cerino Córdova, Felipe de Jesús Medina Ruiz, Pavel Villarreal Chiu, Juan Francisco Morones Ramírez, José Rubén Metal-Induced Production of a Novel Bioadsorbent Exopolysaccharide in a Native Rhodotorula mucilaginosa from the Mexican Northeastern Region |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Metal-Induced Production of a Novel Bioadsorbent Exopolysaccharide in a Native Rhodotorula mucilaginosa from the Mexican Northeastern Region |
| title_full | Metal-Induced Production of a Novel Bioadsorbent Exopolysaccharide in a Native Rhodotorula mucilaginosa from the Mexican Northeastern Region |
| title_fullStr | Metal-Induced Production of a Novel Bioadsorbent Exopolysaccharide in a Native Rhodotorula mucilaginosa from the Mexican Northeastern Region |
| title_full_unstemmed | Metal-Induced Production of a Novel Bioadsorbent Exopolysaccharide in a Native Rhodotorula mucilaginosa from the Mexican Northeastern Region |
| title_short | Metal-Induced Production of a Novel Bioadsorbent Exopolysaccharide in a Native Rhodotorula mucilaginosa from the Mexican Northeastern Region |
| title_sort | metal induced production of a novel bioadsorbent exopolysaccharide in a native rhodotorula mucilaginosa from the mexican northeastern region |
| url | http://eprints.uanl.mx/14841/1/57.pdf |
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