Biosorption of methylene blue and malachite green from single and binary solutions by Pinus pinaster bark
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| Format: | Artículo científico |
| Language: | en |
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Universidad del Bío Bío
2024
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| author | Khaoula Litefti |
| author_facet | Khaoula Litefti |
| contents | Biosorption of methylene blue and malachite green from single and binary solutions by Pinus pinaster bark Khaoula Litefti M. Sonia Freire Mostafa Stitou Julia González-Álvarez Agrociencias Bark adsorption wood veneer methylene blue Pinus pinaster Aiming to develop a sustainable separation process reducing the water pollution, in this work Pinus pinaster (cluster pine) bark from a wood veneer industry was used for methylene blue and malachite green removal from aqueous systems. For single adsorption, the influence of time (up 8 h), adsorbent dose (2,5 - 5 - 10 g·L-1), temperature (25 ºC - 40 ºC - 60 ºC), pH (2 - 4 - 6) and particle size (0,1 mm - 0,5 mm, 0,5 mm - 1 mm and 1,6 mm - 2 mm) on adsorption was investigated. To study the initial concentration effect on binary adsorption, different concentrations (0 - 5 - 25 - 50 mg·L-1) were used at 25 ºC, natural pH and a dose of 5 g·L-1. High efficiency was obtained at pH = 4 (natural pH), dose of 5 g·L-1 and particle size of 0,5 - 1 mm. Adsorption percentages higher than 70 % were reached in less than one hour, with removal almost complete at equilibrium in single systems, without temperature influence. Methylene blue was slightly better adsorbed by bark. In binary systems, dyes exhibited competitive adsorption, decreasing their removal, especially increasing the initial concentration of the other dye. Dyes adsorption followed the pseudo-second order kinetic model, whereas the Langmuir isotherm explained adsorption equilibria in mono-component systems. High adsorption capacities (41,7 mg·g-1 for malachite green and 50,0 mg·g-1 for methylene blue) were obtained at 40 ºC and natural pH indicating that pine bark can be effectively used as biosorbent. 2024 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48578772014 https://www.redalyc.org/journal/485/48578772014/ https://www.redalyc.org/journal/485/48578772014/html/ https://www.redalyc.org/journal/485/48578772014/48578772014.epub https://www.redalyc.org/journal/485/48578772014/movil 10.22320/s0718221x/2024.14 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.26 |
| format | Artículo científico |
| id | redalyc_48578772014 |
| institution | Redalyc |
| language | en |
| publishDate | 2024 |
| publisher | Universidad del Bío Bío |
| spellingShingle | Biosorption of methylene blue and malachite green from single and binary solutions by Pinus pinaster bark Khaoula Litefti Agrociencias Bark adsorption wood veneer methylene blue Pinus pinaster Biosorption of methylene blue and malachite green from single and binary solutions by Pinus pinaster bark Khaoula Litefti M. Sonia Freire Mostafa Stitou Julia González-Álvarez Agrociencias Bark adsorption wood veneer methylene blue Pinus pinaster Aiming to develop a sustainable separation process reducing the water pollution, in this work Pinus pinaster (cluster pine) bark from a wood veneer industry was used for methylene blue and malachite green removal from aqueous systems. For single adsorption, the influence of time (up 8 h), adsorbent dose (2,5 - 5 - 10 g·L-1), temperature (25 ºC - 40 ºC - 60 ºC), pH (2 - 4 - 6) and particle size (0,1 mm - 0,5 mm, 0,5 mm - 1 mm and 1,6 mm - 2 mm) on adsorption was investigated. To study the initial concentration effect on binary adsorption, different concentrations (0 - 5 - 25 - 50 mg·L-1) were used at 25 ºC, natural pH and a dose of 5 g·L-1. High efficiency was obtained at pH = 4 (natural pH), dose of 5 g·L-1 and particle size of 0,5 - 1 mm. Adsorption percentages higher than 70 % were reached in less than one hour, with removal almost complete at equilibrium in single systems, without temperature influence. Methylene blue was slightly better adsorbed by bark. In binary systems, dyes exhibited competitive adsorption, decreasing their removal, especially increasing the initial concentration of the other dye. Dyes adsorption followed the pseudo-second order kinetic model, whereas the Langmuir isotherm explained adsorption equilibria in mono-component systems. High adsorption capacities (41,7 mg·g-1 for malachite green and 50,0 mg·g-1 for methylene blue) were obtained at 40 ºC and natural pH indicating that pine bark can be effectively used as biosorbent. 2024 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48578772014 https://www.redalyc.org/journal/485/48578772014/ https://www.redalyc.org/journal/485/48578772014/html/ https://www.redalyc.org/journal/485/48578772014/48578772014.epub https://www.redalyc.org/journal/485/48578772014/movil 10.22320/s0718221x/2024.14 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.26 |
| title | Biosorption of methylene blue and malachite green from single and binary solutions by Pinus pinaster bark |
| topic | Agrociencias Bark adsorption wood veneer methylene blue Pinus pinaster |
| url | https://www.redalyc.org/articulo.oa?id=48578772014 https://www.redalyc.org/journal/485/48578772014/ https://www.redalyc.org/journal/485/48578772014/html/ https://www.redalyc.org/journal/485/48578772014/48578772014.epub https://www.redalyc.org/journal/485/48578772014/movil |