Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes)
The existence of water hyacinth proliferation in wetlands of the Canal del Dique (Department of Bolívar, Colombia) causes environmental problems because there is no final disposal of these. Therefore, it is necessary to study alternatives for its use. The objective of the study was to evaluate the behavior of the aquatic hyacinth as an adsorbent of Cr (VI) (VI) and Hg (II) (II) in a synthetically prepared solution. The lignocellulosic material was dried at 80°C for 24 h to remove moisture; then crushed and sieved with meshes of different particle sizes; characterized by elemental analysis to check for the presence of cellulose, hemicellulose, and lignin, as well as by Fourier Transform Infrared Spectrometry to verify the existence of functional groups responsible for the adsorption process. It was found that the best particle size was 1 mm, with a removal percentage of 73,4 and 79,3% for Cr (VI) and Hg (II), respectively. When establishing the adsorption kinetics, it was verified that the elimination percentage increases with time up to 5,5 h of contact with the Hg (II) solution and 3,8 h with the Cr (VI) solution.
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Digital revista |
| Language: | eng |
| Published: |
Universidad del Cauca -Facultad de ciencias Agrarias
2020
|
| Online Access: | https://revistas.unicauca.edu.co/index.php/biotecnologia/article/view/1563 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
rev-bsaa-co-article-1563 |
|---|---|
| record_format |
ojs |
| institution |
UNICAUCA CO |
| collection |
OJS |
| country |
Colombia |
| countrycode |
CO |
| component |
Revista |
| access |
En linea |
| databasecode |
rev-bsaa-co |
| tag |
revista |
| region |
America del Sur |
| libraryname |
Biblioteca de la UNICAUCA de Colombia |
| language |
eng |
| format |
Digital |
| author |
Tejada Tobar, Candelaria Paz Astudillo, Isabel Cristina Acevedo Correa, Diofanor Espinosa Fortich, María López Badel, Cristina |
| spellingShingle |
Tejada Tobar, Candelaria Paz Astudillo, Isabel Cristina Acevedo Correa, Diofanor Espinosa Fortich, María López Badel, Cristina Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes) |
| author_facet |
Tejada Tobar, Candelaria Paz Astudillo, Isabel Cristina Acevedo Correa, Diofanor Espinosa Fortich, María López Badel, Cristina |
| author_sort |
Tejada Tobar, Candelaria |
| title |
Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes) |
| title_short |
Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes) |
| title_full |
Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes) |
| title_fullStr |
Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes) |
| title_full_unstemmed |
Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes) |
| title_sort |
adsorción de cromo (vi) y mercurio (ii) en solución utilizando jacinto (eichhornia crassipes) |
| description |
The existence of water hyacinth proliferation in wetlands of the Canal del Dique (Department of Bolívar, Colombia) causes environmental problems because there is no final disposal of these. Therefore, it is necessary to study alternatives for its use. The objective of the study was to evaluate the behavior of the aquatic hyacinth as an adsorbent of Cr (VI) (VI) and Hg (II) (II) in a synthetically prepared solution. The lignocellulosic material was dried at 80°C for 24 h to remove moisture; then crushed and sieved with meshes of different particle sizes; characterized by elemental analysis to check for the presence of cellulose, hemicellulose, and lignin, as well as by Fourier Transform Infrared Spectrometry to verify the existence of functional groups responsible for the adsorption process. It was found that the best particle size was 1 mm, with a removal percentage of 73,4 and 79,3% for Cr (VI) and Hg (II), respectively. When establishing the adsorption kinetics, it was verified that the elimination percentage increases with time up to 5,5 h of contact with the Hg (II) solution and 3,8 h with the Cr (VI) solution. |
| publisher |
Universidad del Cauca -Facultad de ciencias Agrarias |
| publishDate |
2020 |
| url |
https://revistas.unicauca.edu.co/index.php/biotecnologia/article/view/1563 |
| work_keys_str_mv |
AT tejadatobarcandelaria adsorciondecromoviymercurioiiensolucionutilizandojacintoeichhorniacrassipes AT pazastudilloisabelcristina adsorciondecromoviymercurioiiensolucionutilizandojacintoeichhorniacrassipes AT acevedocorreadiofanor adsorciondecromoviymercurioiiensolucionutilizandojacintoeichhorniacrassipes AT espinosafortichmaria adsorciondecromoviymercurioiiensolucionutilizandojacintoeichhorniacrassipes AT lopezbadelcristina adsorciondecromoviymercurioiiensolucionutilizandojacintoeichhorniacrassipes AT tejadatobarcandelaria adsorptionofchromeviandmercuryiiinsolutionusinghyacintheichhorniacrassipes AT pazastudilloisabelcristina adsorptionofchromeviandmercuryiiinsolutionusinghyacintheichhorniacrassipes AT acevedocorreadiofanor adsorptionofchromeviandmercuryiiinsolutionusinghyacintheichhorniacrassipes AT espinosafortichmaria adsorptionofchromeviandmercuryiiinsolutionusinghyacintheichhorniacrassipes AT lopezbadelcristina adsorptionofchromeviandmercuryiiinsolutionusinghyacintheichhorniacrassipes AT tejadatobarcandelaria adsorcaodecromioviemercurioiiemsolucaoutilizandohiacitoeichhorniacrassipes AT pazastudilloisabelcristina adsorcaodecromioviemercurioiiemsolucaoutilizandohiacitoeichhorniacrassipes AT acevedocorreadiofanor adsorcaodecromioviemercurioiiemsolucaoutilizandohiacitoeichhorniacrassipes AT espinosafortichmaria adsorcaodecromioviemercurioiiemsolucaoutilizandohiacitoeichhorniacrassipes AT lopezbadelcristina adsorcaodecromioviemercurioiiemsolucaoutilizandohiacitoeichhorniacrassipes |
| _version_ |
1763178388945633280 |
| spelling |
rev-bsaa-co-article-15632021-03-10T23:04:12Z Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes) Adsorption of chrome (VI) and mercury (II) in solution using hyacinth (Eichhornia crassipes) Adsorção de crómio (VI) e mercúrio (II) em solução utilizando hiácito (Eichhornia crassipes) Tejada Tobar, Candelaria Paz Astudillo, Isabel Cristina Acevedo Correa, Diofanor Espinosa Fortich, María López Badel, Cristina Biomasa residual Adsorcion Metales pesados Modelo de Freundlich Eichhornia crassipes Residual Biomass Adsorption Heavy Metals Freundlich model Eichhornia crassipes Biomassa residual Adsorção Metais pesados Modelo de Freundlich Eichhornia crassipes The existence of water hyacinth proliferation in wetlands of the Canal del Dique (Department of Bolívar, Colombia) causes environmental problems because there is no final disposal of these. Therefore, it is necessary to study alternatives for its use. The objective of the study was to evaluate the behavior of the aquatic hyacinth as an adsorbent of Cr (VI) (VI) and Hg (II) (II) in a synthetically prepared solution. The lignocellulosic material was dried at 80°C for 24 h to remove moisture; then crushed and sieved with meshes of different particle sizes; characterized by elemental analysis to check for the presence of cellulose, hemicellulose, and lignin, as well as by Fourier Transform Infrared Spectrometry to verify the existence of functional groups responsible for the adsorption process. It was found that the best particle size was 1 mm, with a removal percentage of 73,4 and 79,3% for Cr (VI) and Hg (II), respectively. When establishing the adsorption kinetics, it was verified that the elimination percentage increases with time up to 5,5 h of contact with the Hg (II) solution and 3,8 h with the Cr (VI) solution. La existencia de proliferación de Jacinto acuático en los humedales del Canal del Dique (Bolívar-Colombia) causa problemas ambientales por no existir una disposición final de estos. Por lo tanto, es necesario estudiar alternativas para su uso. El objetivo del estudio fue evaluar el comportamiento del Jacinto acuático como adsorbente de cromo (VI) y mercurio (II) en una solución preparada sintéticamente. El material lignocelulósico se secó a 80°C durante 24 h para eliminar la humedad; luego se trituró y tamizó con mallas de diferentes tamaños de partículas; se caracterizó mediante análisis elementales para comprobar la presencia de celulosa, hemicelulosa y lignina, así como mediante espectrometría de infrarrojos por transformada de Fourier para verificar la existencia de grupos funcionales responsables del proceso de adsorción. Se encontró que el mejor tamaño de partícula era de 1 mm, con un porcentaje de remoción de 73,4 y 79,3% para el cromo y el mercurio, respectivamente. Al establecer la cinética de adsorción se comprobó que el porcentaje de eliminación aumenta con el tiempo hasta 5,5 h de contacto con la solución de mercurio y 3,8 h con la solución de cromo. A existência de proliferação de jacintos de água nas zonas húmidas do Canal del Dique (Bolívar) causa problemas ambientais porque não há disposição final dos mesmos. Portanto, é necessário estudar alternativas para o seu uso. O objetivo do estudo foi avaliar o comportamento do jacinto aquático como adsorvente de cromo (VI) e mercúrio (II) em uma solução sinteticamente preparada. O material lignocelulósico foi seco a 80°C durante 24 h para remover a humidade; depois triturado e peneirado com malhas de diferentes tamanhos de partículas; caracterizado pela análise elementar para verificar a presença de celulose, hemicelulose e lignina, bem como pela Espectrometria de Infravermelhos por Transformada de Fourier para verificar a existência de grupos funcionais responsáveis pelo processo de adsorção. Verificou-se que o melhor tamanho de partícula era de 1 mm, com uma percentagem de remoção de 73,4 e 79,3% para o crómio e o mercúrio, respectivamente. Ao estabelecer a cinética de adsorção verificou-se que a percentagem de eliminação aumenta com o tempo até 5,5 h de contacto com a solução de mercúrio e 3,8 h com a solução de crómio. Universidad del Cauca -Facultad de ciencias Agrarias 2020-07-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unicauca.edu.co/index.php/biotecnologia/article/view/1563 10.18684/bsaa.v19.n1.2021.1563 Biotechnology in the Agricultural and Agroindustrial Sector; Vol. 19 No. 1 (2021): January to June; 54-65 Biotecnología en el Sector Agropecuario y Agroindustrial; Vol. 19 Núm. 1 (2021): Enero a Junio; 54-65 1909-9959 1692-3561 eng https://revistas.unicauca.edu.co/index.php/biotecnologia/article/view/1563/1461 /*ref*/YU, HAIHAO; DONG, XIANRU; YU, DAN; LIU, CHUNHUA; FAN, SHUFENG. Effects of eutrophication and different water levels on overwintering of Eichhornia crassipes at the northern margin of its distribution in China. Frontiers in plant science, v. 10, 2019, p. 1–11. /*ref*/TEJADA-TOVAR, CANDELARIA; PAZ-ASTUDILLO, ISABEL; VILLABONA-ORTÍZ, ÁNGEL; ESPINOSA-FORTICH, MARÍA; LÓPEZ-BADEL, CRISTINA Aprovechamiento del Jacinto de Agua (Eichhornia crassipes) para la síntesis de carboximetilcelulosa. Revista Cubana de Química, v. 30, n. 2, 2018, p. 211-221. /*ref*/ZHANG, QIAN; LUO, FANG-LI; DONG, BI-CHENG. Does species richness affect the growth and water quality of submerged macrophyte assemblages?. Aquatic botany, v. 153, 2019, p. 51-57. /*ref*/MARIMÓN-BOLÍVAR, WILFREDO; TEJEDA-BENÍTEZ, LESLY; HERRERA, ADRIANA-P. Removal of Hg (II) (II) from water using magnetic nanoparticles coated with amino organic ligands and yam peel biomass. Environmental nanotechnology, monitoring & management, v. 10, 2018, p. 486-493. /*ref*/TEJADA-TOVAR, CANDELARIA; VILLABONA-ORTÍZ, ÁNGEL; GONZÁLEZ-DELGADO, ÁNGEL-DARÍO; JIMÉNEZ-VILLADIEGO, MARÍA. Kinetics of Hg (II) and nickel adsorption using chemically pretreated cocoa (Theobroma cacao) husks. Transactions of the ASABE, v. 62, n. 2, 2019, p. 461-466. /*ref*/VILLABONA-ORTIZ, ÁNGEL; TEJADA-TOVAR, CANDELARIA; GONZÁLEZ-DELGADO, ÁNGEL;HERRERA-BARROS, ADRIANA; CANTILLO-ARROYO, GINA. Immobilization of lead and nickel ions from polluted yam peels biomass using cement-based solidification/stabilization technique. International Journal of Chemical Engineering, v. 2019, 2019, p. 8. /*ref*/DAI, YINGJIE; SUN, QIYA; WANG, WENSI; LU, LU; LIU, MEI; LI, JINGJING; YANG, SHENGSHU; SUNG, YUE; ZHANG, KEXIN; XU, JIAYI; ZHENG, WENLEI; HU, ZHAOYUE; YANG, YAHAN; GAO, YUEWEN; CHEN, YANJUN; ZHANG, ZU; GAO, FENG; ZHANG, YING. Utilizations of agricultural waste as adsorbent for the removal of contaminants: A review. Chemosphere, v. 211, 2018, p. 235–253. https://doi.org/10.1016/j.chemosphere.2018.06.179 /*ref*/GÓMEZ-AGUILAR, DORA-LUZ; RODRÍGUEZ-MIRANDA, JUAN-PABLO; ESTEBAN-MUÑOZ, JAVIER-ANDRÉS; BETANCUR, JHON-FREDY. Coffee Pulp: A sustainable alternative removal of Cr (VI) in wastewaters. Processes, v. 7, n. 7, 2019, p. 403. /*ref*/MANJULADEVI, M.; ANITHA, R.; MANONMANI, S. Kinetic study on adsorption of Cr (VI), Ni (II), Cd (II) and Pb (II) ions from aqueous solutions using activated carbon prepared from Cucumis melo peel. Applied water science, v. 8, n. 1, 2018, p. 36. https://doi.org/10.1007/s13201-018-0674-1 /*ref*/ASUQUO, EDIDIONG; MARTIN, ALASTAIR; NZEREM, PETRUS; SIPERSTEIN, FLOR; FAN, XIAOLEI. Adsorption of Cd (II) and Pb (II) ions from aqueous solutions using mesoporous activated carbon adsorbent: Equilibrium, kinetics and characterisation studies. Journal of environmental chemical engineering, v. 5, n. 1, 2017, p. 679-698. https://doi.org/10.1016/j.jece.2016.12.043 /*ref*/UL-HAQ, ATTA; SAEED, MUHAMMAD; ANJUM, SALMA; HUSSAIN-BOKHARI, TANVEER; USMAN, MUHAMMED; TUBBSUM, SAIQA. Evaluation of Sorption Mechanism of Pb (II) and Ni (II) onto Pea (Pisum sativum) Peels. Journal of oleo science, v. 66, n. 7, 2017, p. 735-743. /*ref*/VILLABONA-ORTÍZ, A.; TEJADA-TOVAR, C.N.; ORTEGA-TORO, R. Modelling of the adsorption kinetics of Cr (VI) (VI) using waste biomaterials. Revista Mexicana de Ingeniería Química, v. 19, n. 1, 2020, p. 401-408. /*ref*/AFROZE, SHARMEEN; SEN, TUSHAR-KANTI. A review on heavy metal ions and dye adsorption from water by agricultural solid waste adsorbents. Water, Air, & Soil Pollution, v. 229, n. 7, 2018, p. 225. /*ref*/PARLAYICI, ŞERIFE; PEHLIVAN, EROL. Comparative study of Cr (VI) removal by bio-waste adsorbents: equilibrium, kinetics, and thermodynamic. Journal of Analytical Science and Technology, v. 10, n. 1, 2019, p.15. /*ref*/ROMERO-CANO, LUIS A.; GARCÍA-ROSERO, HELENA; GONZALEZ-GUTIERREZ, LINDA V.; BALDENEGRO-PÉREZ, LEONARDO A.; CARRASCO-MARÍN, FRANCISCO. Functionalized adsorbents prepared from fruit peels: Equilibrium, kinetic and thermodynamic studies for copper adsorption in aqueous solution. Journal of cleaner production, v. 162, 2017, p. 195-204. Ç /*ref*/NEGM, NABEL A.; ABD-EL-WAHED, MOHAMED; HASSAM, ABDEL-RAHMAN; ABOU-KANA, MARAM. Feasibility of metal adsorption using brown algae and fungi: Effect of biosorbents structure on adsorption isotherm and kinetics. Journal of Molecular Liquids, v. 264, 2018, p. 292-305. /*ref*/BATAGARAWA, SAMAILA-MUAZU; AJIBOLA, ALAYANDE-KEHINDE. Comparative evaluation for the adsorption of toxic heavy metals on to millet, corn and rice husks as adsorbents. Journal of Analytical and Pharmaceutical Research, v. 8, n. 3, 2019, p. 119-125. /*ref*/TEJADA-TOVAR, CANDELARIA; HERRERA-BARROS, ADRIANA; VILLABONA-ORTÍZ, ANGEL. Assessment of chemically modified lignocellulose waste for the adsorption of Cr (VI). Revista Facultad de Ingeniería, v. 29, n. 54, 2020, p. e10298-e10298. /*ref*/HERRERA-BARROS, ADRIANA; TEJADA-TOVAR, CANDELARIA; VILLABONA-ORTÍZ, ÁNGEL; GONZÁLEZ-DELGADO, ÁNGEL; REYES-RAMOS, ANA. Synthesis and characterization of cassava, yam and lemon peels modified with TiO2 nanoparticles. Contemporary Engineering Sciences, v. 11, n. 38, 2018, p. 1863–1871. /*ref*/TEJADA-TOVAR, CANDELARIA; VILLABONA-ORTÍZ, ANGEL; RUIZ-PATERNINA, ERIKA. Adsorción de Ni (II) por cáscaras de ñame (Dioscórea rotundata) y bagazo de palma (Elaeis guineensis) pretratadas. Revista Luna Azul, v. 42, 2016, p. 30-43. /*ref*/TEJADA-TOVAR, CANDELARIA; GALLO-MERCADO, JORGE; MOSCOTE, JEISON; VILLABONA, ÁNGEL; ACEVEDO-CORREA, DIOFANOR. Adsorción competitiva de plomo y niquel sobre cáscara de ñame y bagazo de palma en sistema continuo. Biotecnología en el Sector Agropecuario y Agroindustrial, v. 16, n. 1, 2018, p. 52-61. /*ref*/TEJADA, CANDELARIA; HERRERA, ADRIANA; RUIZ, ERIKA. Kinetic and isotherms of biosorption of Hg (II) using citric acid treated residual materials. Ingeniería y competitividad, v. 18, n. 1, 2016, p. 117-127. /*ref*/SINGH, KULBIR; ABDULLAHI, WAZIRI-SADIQ; RAM, CHHOTU. Removal of hmetals by Adsorption using agricultural based residue: A Review. Research Journal of Chemistry and Environment, v. 22, n. 5, 2018, p. 65–74. /*ref*/RODRIGUEZ-SOTO, K.X.; PIÑEROS-CASTRO, N.Y.; ORTEGA-TORO, R. Laminated composites reinforced with chemically modified sheets-stalk of Musa cavendish. Revista Mexicana de Ingeniería Química, v. 18, n .2, 2019, p. 749-758. /*ref*/ABDOLALI, ATEFEH; NGO, HUU-HAO; GUO, WENSHAN; ZHOU, JOHN L.; ZHANG, SHUANG; CHANG, SOON W.; NGUYEN, DINH-DUC; LUI, YI. Application of a breakthrough biosorbent for removing heavy metals from synthetic and real wastewaters in a lab-scale continuous fixed-bed column. Bioresource technology, v. 229, 2017, p. 78-87. /*ref*/KHALIFA, E. BEN; RZIG, B.; CHAKROUN, R.; NOUAGUI, H.; HAMROUNI, B. Application of response surface methodology for Cr (VI) removal by adsorption on low-cost biosorbent. Chemometrics and Intelligent Laboratory Systems, v. 189, 2019, p. 18-26. /*ref*/Yi, YUNHONG; LV, JUNLIANG; LIU, YI; WU, GONGQING Synthesis and application of modified Litchi peel for removal of hexavalent Cr (VI) from aqueous solutions. Journal of Molecular Liquids, v. 225, 2017, p. 28-33. /*ref*/NAIK, RADNEY-MOHAN; RATAN, S.; SINGH, I. Use of orange peel as an adsorbent for the removal of Cr (VI) from its aqueous solution. Indian Journal of Chemical Technology, v. 25, n. 3, 2018, p. 300–305. /*ref*/ROSALES, A.G.; RODRÍGUEZ, C.D.; BALLEN-SEGURA, M. Remoción de contaminantes y crecimiento del alga Scenedesmus sp. en aguas residuales de curtiembres, comparación entre células libres e inmovilizadas. Ingeniería y Ciencia, v. 14, n. 28, 2018, p. 11-34. /*ref*/DOKE, KAILAS; KHAN, EJAZUDDIN. Equilibrium, kinetic and diffusion mechanism of Cr (VI) adsorption onto activated carbon derived from wood apple shell. Arabian journal of chemistry, v. 10, n. 1, 2017, p. S252-S260. /*ref*/ASUQUO, EDIDIONG; MARTIN, ALASTAIR. Sorption of cadmium (II) ion from aqueous solution onto sweet potato (Ipomoea batatas L.) peel adsorbent: characterisation, kinetic and isotherm studies. Journal of environmental chemical engineering, v. 4, n. 4, 2016, p. 4207-4228. /*ref*/KUPPUSAMY, SARANYA; THAVAMANI, PALANISAMI; MEGHARAJ, MALLAVARAPU; VENKATESWARLU, KADIYALA; LEE, YONG-BOK; NAIDU, RAVI. Oak (Quercus robur) acorn peel as a low-cost adsorbent for hexavalent Cr (VI) removal from aquatic ecosystems and industrial effluents. Water, Air & Soil Pollution, v. 227, n. 2, 2016, p. 62. /*ref*/LIANG, XIAOLIANG; WEI, GAOLING; XIONG, JUAN; TAN, FUDING; HE, HONGPING; QU, CHENCHEN; YIN, HUI; ZHU, JIANXI; ZHU, RUNLIANG; QIN, ZONGHUA; ZHANG, JING. Adsorption isotherm, mechanism, and geometry of Pb (II) on magnetites substituted with transition metals. Chemical Geology, v. 470, 2017, p. 132-140. /*ref*/ALI, ASHRAF; SAEED, KHALID; MABOOD, FAZAL. Removal of Cr (VI) (VI) from aqueous medium using chemically modified banana peels as efficient low-cost adsorbent. Alexandria Engineering Journal, v. 55, n. 3, 2016, p. 2933-2942. /*ref*/GARBA, ZAHARADDEEN; UGBAGA, NKOLE; ABDULLAHI, AMINA. Evaluation of optimum adsorption conditions for Ni (II) and Cd (II) removal from aqueous solution by modified plantain peels (MPP). Beni-Suef University Journal of Basic and Applied Sciences, v. 5, n. 2, 2016, p. 170-179. /*ref*/HU, XIAOLAN; XUE, YINGWEN; LIU, LINA; ZENG, YIFAN; LONG, LI. Preparation and characterization of Na 2 S-modified biochar for nickel removal. Environmental Science and Pollution Research, v. 25, n. 10, 2018, p. 9887-9895. /*ref*/SHEN, ZHENGTAO; ZHANG, YUNHUI; MCMILLAN, OLIVER; JIN, FEI; AL-TABBAA, ABIR. Characteristics and mechanisms of nickel adsorption on biochars produced from wheat straw pellets and rice husk. Environmental Science and Pollution Research, v. 24, n. 14, 2017, p. 12809-12819. /*ref*/SUDHA, R.; PREMKUMAR, P.; RAMASAMY, S. Comparative studies on the removal of Cr (VI) (VI) from aqueous solutions using raw and modified citrus limettioides peel. Indian Journal of Chemical Technology (IJCT), v. 25, n. 3, 2018, p. 255-265. /*ref*/LIN, CHAO; LUO, WENJUN; LUO, TIANTIAN; ZHOU, QI; LI, HAIFENG; JING, LURU. A study on adsorption of Cr (VI) by modified rice straw: Characteristics, performances and mechanism. Journal of cleaner production, v. 196, 2018, p. 626-634. /*ref*/KAR, SHANTI; EQUEENUDDIN, S.M. Adsorption of hexavalent Cr (VI) using natural goethite: isotherm, thermodynamic and kinetic study. Journal of the Geological Society of India, v. 93, n. 3, 2019, p. 285-292. /*ref*/ALLAHDIN, OSCAR; MABINGUI, JOSEPH; WARTEL, MICHEL; BOUGHRIET, ABDEL. Removal of Pb2+ ions from aqueous solutions by fixed-BED column using a modified brick: (micro) structural, electrokinetic and mechanistic aspects. Applied Clay Science, v. 148, 2017, p. 56-67. /*ref*/LEE, CHANG-GU; LEE, SOONJAE; PARK, JEONG-ANN; PARK, CHANHYUK; LEE, SANG-JEONG; KIM, SONG-BAE; AN, BYUNGRYUL; YUN, SEONG-TAEK; LEE, SANG-HYUP; CHOI, JAE-WOO. Removal of copper, nickel and Cr (VI) mixtures from metal plating wastewater by adsorption with modified carbon foam. Chemosphere, v. 166, 2017, p. 203-211. Derechos de autor 2020 Universidad del Cauca |