Engineered Mg-modified biochar-based sorbent for arsenic separation and pre-concentration
Abstract The utilization of biochar as a relatively efficient sorbent or stationary phase for the separation and preconcentration of a wide range of analytes represents an innovative approach in current sample pretreatment methods. Appropriate pre- and post-pyrolysis modification of the input precur...
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Nature Portfolio
2024-11-01
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| Accés en línia: | https://doi.org/10.1038/s41598-024-79446-4 |
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| author | Vladimír Frišták Kristína Beliančínová Lucia Polťáková Eduardo Moreno-Jimenéz Andrew R. Zimmerman Libor Ďuriška Ivona Černičková Haywood Dail Laughinghouse IV Martin Pipíška |
| author_facet | Vladimír Frišták Kristína Beliančínová Lucia Polťáková Eduardo Moreno-Jimenéz Andrew R. Zimmerman Libor Ďuriška Ivona Černičková Haywood Dail Laughinghouse IV Martin Pipíška |
| author_sort | Vladimír Frišták |
| collection | DOAJ |
| description | Abstract The utilization of biochar as a relatively efficient sorbent or stationary phase for the separation and preconcentration of a wide range of analytes represents an innovative approach in current sample pretreatment methods. Appropriate pre- and post-pyrolysis modification of the input precursor and pyrolysis product, respectively, allows targeted design of the physicochemical properties and sorption characteristics of the resulting sorbent. The present work deals with the preparation of pyrolysis materials based on unmodified cattail leaf biomass (BC) and its Mg-modified analogue (MgBC) by a slow pyrolysis process at 500 °C and a residence time of 1 h in a pyrolysis reactor. Physicochemical characterization of BC and MgBC carried out by pH, total C, N, surface size analysis (SSA), 13C NMR, SEM-EDX and XRD confirmed significant morphological and mineralogical differences between the prepared sorbents. By performing sorption experiments using a model anionic analyte (As) and application of Langmuir isotherm, we found that the predicted maximum sorption capacity of MgBC for As is 13.5-fold higher than that of BC. The sorption process of As by both sorbents is best described by the Sips adsorption isotherm (R2 ≥ 0.995) and a pseudo-nth order kinetic model (R2 ≥ 0.997). The optimum pH for As sorption by BC and MgBC sorbents is in the interval 5–6. The presence of competitive phosphate anions (equimolar concentration of 1:1) in the solution significantly reduces the sorption capacity of MgBC for As by 40% for BC by 70%. The presence of Cl- ions showed no significant effect on the sorption capacity of Bc and MgBC for As. Both sorbents were best recovered using 0.1 mol/L NaOH solution when the desorption efficiency for both sorbents was more than 95%. The MgBC sorbent showed 35% retention of As from the real sample in the model SPE column at a flow rate of 0.12 mL/s. Based on the obtained knowledge, it is evident that biochar-based sorbent prepared from Mg-modified precursor represents an effective sorbent for anionic forms of analytes and opens the possibility of its use also in preconcentration and separation techniques. |
| first_indexed | 2025-02-18T03:11:46Z |
| format | Article |
| id | doaj.art-b3940b11a8284964b51f59876fbcb09b |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2025-02-18T03:11:46Z |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj.art-b3940b11a8284964b51f59876fbcb09b2024-11-24T12:23:09ZengNature PortfolioScientific Reports2045-23222024-11-0114111310.1038/s41598-024-79446-4Engineered Mg-modified biochar-based sorbent for arsenic separation and pre-concentrationVladimír Frišták0Kristína Beliančínová1Lucia Polťáková2Eduardo Moreno-Jimenéz3Andrew R. Zimmerman4Libor Ďuriška5Ivona Černičková6Haywood Dail Laughinghouse IV7Martin Pipíška8Department of Chemistry, Faculty of Education, Trnava University in TrnavaDepartment of Chemistry, Faculty of Education, Trnava University in TrnavaDepartment of Chemistry, Faculty of Education, Trnava University in TrnavaDepartment of Agricultural and Food Chemistry, Faculty of Sciences, Universidad Autónoma de MadridDepartment of Geological Sciences, University of FloridaInstitute of Materials Science, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in BratislavaInstitute of Materials Science, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in BratislavaAgronomy Department, Fort Lauderdale Research and Education Center, University of Florida-IFASDepartment of Chemistry, Faculty of Education, Trnava University in TrnavaAbstract The utilization of biochar as a relatively efficient sorbent or stationary phase for the separation and preconcentration of a wide range of analytes represents an innovative approach in current sample pretreatment methods. Appropriate pre- and post-pyrolysis modification of the input precursor and pyrolysis product, respectively, allows targeted design of the physicochemical properties and sorption characteristics of the resulting sorbent. The present work deals with the preparation of pyrolysis materials based on unmodified cattail leaf biomass (BC) and its Mg-modified analogue (MgBC) by a slow pyrolysis process at 500 °C and a residence time of 1 h in a pyrolysis reactor. Physicochemical characterization of BC and MgBC carried out by pH, total C, N, surface size analysis (SSA), 13C NMR, SEM-EDX and XRD confirmed significant morphological and mineralogical differences between the prepared sorbents. By performing sorption experiments using a model anionic analyte (As) and application of Langmuir isotherm, we found that the predicted maximum sorption capacity of MgBC for As is 13.5-fold higher than that of BC. The sorption process of As by both sorbents is best described by the Sips adsorption isotherm (R2 ≥ 0.995) and a pseudo-nth order kinetic model (R2 ≥ 0.997). The optimum pH for As sorption by BC and MgBC sorbents is in the interval 5–6. The presence of competitive phosphate anions (equimolar concentration of 1:1) in the solution significantly reduces the sorption capacity of MgBC for As by 40% for BC by 70%. The presence of Cl- ions showed no significant effect on the sorption capacity of Bc and MgBC for As. Both sorbents were best recovered using 0.1 mol/L NaOH solution when the desorption efficiency for both sorbents was more than 95%. The MgBC sorbent showed 35% retention of As from the real sample in the model SPE column at a flow rate of 0.12 mL/s. Based on the obtained knowledge, it is evident that biochar-based sorbent prepared from Mg-modified precursor represents an effective sorbent for anionic forms of analytes and opens the possibility of its use also in preconcentration and separation techniques.https://doi.org/10.1038/s41598-024-79446-4BiocharAsSorptionPre-concentrationGreen chemistry |
| spellingShingle | Vladimír Frišták Kristína Beliančínová Lucia Polťáková Eduardo Moreno-Jimenéz Andrew R. Zimmerman Libor Ďuriška Ivona Černičková Haywood Dail Laughinghouse IV Martin Pipíška Engineered Mg-modified biochar-based sorbent for arsenic separation and pre-concentration Scientific Reports Biochar As Sorption Pre-concentration Green chemistry |
| title | Engineered Mg-modified biochar-based sorbent for arsenic separation and pre-concentration |
| title_full | Engineered Mg-modified biochar-based sorbent for arsenic separation and pre-concentration |
| title_fullStr | Engineered Mg-modified biochar-based sorbent for arsenic separation and pre-concentration |
| title_full_unstemmed | Engineered Mg-modified biochar-based sorbent for arsenic separation and pre-concentration |
| title_short | Engineered Mg-modified biochar-based sorbent for arsenic separation and pre-concentration |
| title_sort | engineered mg modified biochar based sorbent for arsenic separation and pre concentration |
| topic | Biochar As Sorption Pre-concentration Green chemistry |
| url | https://doi.org/10.1038/s41598-024-79446-4 |
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