Cargando…
Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials
Massive amounts of industrial and agricultural water around the world are polluted by various types of contaminants that harm the environment and affect human health. Alginic acid is a very versatile green polymer used for heavy metal adsorption due to its availability, biocompatibility, low cost, a...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658144/ https://www.ncbi.nlm.nih.gov/pubmed/34885338 http://dx.doi.org/10.3390/ma14237187 |
_version_ | 1784612660692647936 |
---|---|
author | Râpă, Maria Ţurcanu, Anca Andreea Matei, Ecaterina Predescu, Andra Mihaela Pantilimon, Mircea Cristian Coman, George Predescu, Cristian |
author_facet | Râpă, Maria Ţurcanu, Anca Andreea Matei, Ecaterina Predescu, Andra Mihaela Pantilimon, Mircea Cristian Coman, George Predescu, Cristian |
author_sort | Râpă, Maria |
collection | PubMed |
description | Massive amounts of industrial and agricultural water around the world are polluted by various types of contaminants that harm the environment and affect human health. Alginic acid is a very versatile green polymer used for heavy metal adsorption due to its availability, biocompatibility, low cost, and non-toxic characteristics. The aim of this paper was to prepare new low-cost hybrid composite beads using sodium alginate with treated montmorillonite and kaolin for the adsorption of copper (Cu) cations. Modified and unmodified clays were investigated by studying their morphology and elemental composition, functional groups, and mean particle size and particle size distribution. The characterization of alginate/clay hybrid composite beads was carried out by evaluating surface morphology (by scanning electron microscopy, SEM), crystallinity (by X-ray diffraction, XRD), and point of zero charge (pH(pzc))(Zeta Potential Analyzer). Batch adsorption experiments of alginate/clay hybrid composite beads investigated the effect of metal concentration in the range of 1–4 mg L(−1) on Cu(II) removal, adsorption kinetic for maximum 240 min, and Langmuir and Freundlich adsorption isotherms by using atomic absorption spectrometry. The pseudo-second-order kinetic model best fitted the adsorption for alginate/montmorillonite beads (R(2) = 0.994), while the diffusion process was predominant for montmorillonite/kaolin beads (R(2) = 0.985). The alginate/clay hybrid materials best fitted the Langmuir isotherm model. |
format | Online Article Text |
id | pubmed-8658144 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-86581442021-12-10 Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials Râpă, Maria Ţurcanu, Anca Andreea Matei, Ecaterina Predescu, Andra Mihaela Pantilimon, Mircea Cristian Coman, George Predescu, Cristian Materials (Basel) Article Massive amounts of industrial and agricultural water around the world are polluted by various types of contaminants that harm the environment and affect human health. Alginic acid is a very versatile green polymer used for heavy metal adsorption due to its availability, biocompatibility, low cost, and non-toxic characteristics. The aim of this paper was to prepare new low-cost hybrid composite beads using sodium alginate with treated montmorillonite and kaolin for the adsorption of copper (Cu) cations. Modified and unmodified clays were investigated by studying their morphology and elemental composition, functional groups, and mean particle size and particle size distribution. The characterization of alginate/clay hybrid composite beads was carried out by evaluating surface morphology (by scanning electron microscopy, SEM), crystallinity (by X-ray diffraction, XRD), and point of zero charge (pH(pzc))(Zeta Potential Analyzer). Batch adsorption experiments of alginate/clay hybrid composite beads investigated the effect of metal concentration in the range of 1–4 mg L(−1) on Cu(II) removal, adsorption kinetic for maximum 240 min, and Langmuir and Freundlich adsorption isotherms by using atomic absorption spectrometry. The pseudo-second-order kinetic model best fitted the adsorption for alginate/montmorillonite beads (R(2) = 0.994), while the diffusion process was predominant for montmorillonite/kaolin beads (R(2) = 0.985). The alginate/clay hybrid materials best fitted the Langmuir isotherm model. MDPI 2021-11-25 /pmc/articles/PMC8658144/ /pubmed/34885338 http://dx.doi.org/10.3390/ma14237187 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Râpă, Maria Ţurcanu, Anca Andreea Matei, Ecaterina Predescu, Andra Mihaela Pantilimon, Mircea Cristian Coman, George Predescu, Cristian Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials |
title | Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials |
title_full | Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials |
title_fullStr | Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials |
title_full_unstemmed | Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials |
title_short | Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials |
title_sort | adsorption of copper (ii) from aqueous solutions with alginate/clay hybrid materials |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658144/ https://www.ncbi.nlm.nih.gov/pubmed/34885338 http://dx.doi.org/10.3390/ma14237187 |
work_keys_str_mv | AT rapamaria adsorptionofcopperiifromaqueoussolutionswithalginateclayhybridmaterials AT turcanuancaandreea adsorptionofcopperiifromaqueoussolutionswithalginateclayhybridmaterials AT mateiecaterina adsorptionofcopperiifromaqueoussolutionswithalginateclayhybridmaterials AT predescuandramihaela adsorptionofcopperiifromaqueoussolutionswithalginateclayhybridmaterials AT pantilimonmirceacristian adsorptionofcopperiifromaqueoussolutionswithalginateclayhybridmaterials AT comangeorge adsorptionofcopperiifromaqueoussolutionswithalginateclayhybridmaterials AT predescucristian adsorptionofcopperiifromaqueoussolutionswithalginateclayhybridmaterials |