Ethylenediaminetetraacetate functionalized MgFe layered double hydroxide/biochar composites for highly efficient adsorptive removal of lead ions from aqueous solutions
The application of layered double hydroxides (LDHs) of MgFe and its composites with biochar of Eucalyptus camdulensis (Eb) and ethylenediaminetetraacetic acid (EDTA) was explored in a batch study to mitigate toxic lead ions (Pb2+) from synthetic wastewater solutions. SEM images revealed that MgFe/LD...
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| Veröffentlicht in: | PloS one 2022-03, Vol.17 (3), p.e0265024-e0265024 |
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| creator | Amin, M T Alazba, A A Shafiq, M |
| description | The application of layered double hydroxides (LDHs) of MgFe and its composites with biochar of Eucalyptus camdulensis (Eb) and ethylenediaminetetraacetic acid (EDTA) was explored in a batch study to mitigate toxic lead ions (Pb2+) from synthetic wastewater solutions. SEM images revealed that MgFe/LDH composites with Eb were successfully formed, while FTIR spectra confirmed the successful adsorption of Pb2+ onto the MgFe/LDH and composite adsorbents. Batch equilibrium was attained after 60 min, then the adsorption capacity gradually increased. An increase in adsorption capacity (and a 60% decrease in the percentage removal) was observed by increasing the initial Pb2+ concentration, and the highest value was 136 mg g-1 for MgFe/LDH-Eb_EDTA. A 50-60% increase in both the adsorption capacities and percent removal was seen in the pH range of 2-6. The second-order kinetic model had a nearly perfect fitting, suggesting that chemisorption was the mechanism controlling adsorption. The Langmuir isotherm model best presented the adsorption data, suggesting that the Pb2+ adsorption was monolayer, and predicted a better affinity between the adsorbent surface and absorbed Pb2+ for MgFe/LDH-Eb_EDTA in comparison to the other two adsorbents. The D-R isotherm suggested that the adsorption system was physical based on E values for all three adsorbents, while the Temkin isotherm model suggested that Pb2+ adsorption was heterogeneous. Finally, the Sips and R-P isotherms predicted that the adsorption of Pb2+ on the surface of the adsorbents was homogeneous and heterogeneous. |
| doi_str_mv | 10.1371/journal.pone.0265024 |
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SEM images revealed that MgFe/LDH composites with Eb were successfully formed, while FTIR spectra confirmed the successful adsorption of Pb2+ onto the MgFe/LDH and composite adsorbents. Batch equilibrium was attained after 60 min, then the adsorption capacity gradually increased. An increase in adsorption capacity (and a 60% decrease in the percentage removal) was observed by increasing the initial Pb2+ concentration, and the highest value was 136 mg g-1 for MgFe/LDH-Eb_EDTA. A 50-60% increase in both the adsorption capacities and percent removal was seen in the pH range of 2-6. The second-order kinetic model had a nearly perfect fitting, suggesting that chemisorption was the mechanism controlling adsorption. The Langmuir isotherm model best presented the adsorption data, suggesting that the Pb2+ adsorption was monolayer, and predicted a better affinity between the adsorbent surface and absorbed Pb2+ for MgFe/LDH-Eb_EDTA in comparison to the other two adsorbents. The D-R isotherm suggested that the adsorption system was physical based on E values for all three adsorbents, while the Temkin isotherm model suggested that Pb2+ adsorption was heterogeneous. Finally, the Sips and R-P isotherms predicted that the adsorption of Pb2+ on the surface of the adsorbents was homogeneous and heterogeneous.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0265024</identifier><identifier>PMID: 35239747</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Acetic acid ; Activated carbon ; Adsorbents ; Adsorption ; Adsorptivity ; Analysis ; Aqueous solutions ; Biology and Life Sciences ; Charcoal ; Chemical properties ; Chemisorption ; Composite materials ; Composition ; Contamination ; Cummingtonite ; Drinking water ; Earth Sciences ; Ecology and Environmental Sciences ; Edetic Acid ; Efficiency ; Ethylenediaminetetraacetic acid ; Ethylenediaminetetraacetic acids ; Eucalyptus ; Fresh water ; Heavy metals ; Hydroxides ; Ions ; Isotherms ; Kinetics ; Lead ; Measurement ; Medicine and Health Sciences ; Physical Sciences ; Research and Analysis Methods ; Surface chemistry ; Toxicity testing ; Wastewater ; Water ; Water Pollutants, Chemical - analysis ; Water treatment</subject><ispartof>PloS one, 2022-03, Vol.17 (3), p.e0265024-e0265024</ispartof><rights>COPYRIGHT 2022 Public Library of Science</rights><rights>2022 Amin et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2022 Amin et al 2022 Amin et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c692t-d3511e85c582260f8799b13e9bf3f2afcaac43f3aff4722bf0c7ccea1f337133</citedby><cites>FETCH-LOGICAL-c692t-d3511e85c582260f8799b13e9bf3f2afcaac43f3aff4722bf0c7ccea1f337133</cites><orcidid>0000-0001-8283-9958</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8893710/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8893710/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,2096,2915,23845,27901,27902,53766,53768,79343,79344</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/35239747$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>Bhatnagar, Amit</contributor><creatorcontrib>Amin, M T</creatorcontrib><creatorcontrib>Alazba, A A</creatorcontrib><creatorcontrib>Shafiq, M</creatorcontrib><title>Ethylenediaminetetraacetate functionalized MgFe layered double hydroxide/biochar composites for highly efficient adsorptive removal of lead ions from aqueous solutions</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>The application of layered double hydroxides (LDHs) of MgFe and its composites with biochar of Eucalyptus camdulensis (Eb) and ethylenediaminetetraacetic acid (EDTA) was explored in a batch study to mitigate toxic lead ions (Pb2+) from synthetic wastewater solutions. SEM images revealed that MgFe/LDH composites with Eb were successfully formed, while FTIR spectra confirmed the successful adsorption of Pb2+ onto the MgFe/LDH and composite adsorbents. Batch equilibrium was attained after 60 min, then the adsorption capacity gradually increased. An increase in adsorption capacity (and a 60% decrease in the percentage removal) was observed by increasing the initial Pb2+ concentration, and the highest value was 136 mg g-1 for MgFe/LDH-Eb_EDTA. A 50-60% increase in both the adsorption capacities and percent removal was seen in the pH range of 2-6. The second-order kinetic model had a nearly perfect fitting, suggesting that chemisorption was the mechanism controlling adsorption. The Langmuir isotherm model best presented the adsorption data, suggesting that the Pb2+ adsorption was monolayer, and predicted a better affinity between the adsorbent surface and absorbed Pb2+ for MgFe/LDH-Eb_EDTA in comparison to the other two adsorbents. The D-R isotherm suggested that the adsorption system was physical based on E values for all three adsorbents, while the Temkin isotherm model suggested that Pb2+ adsorption was heterogeneous. Finally, the Sips and R-P isotherms predicted that the adsorption of Pb2+ on the surface of the adsorbents was homogeneous and heterogeneous.</description><subject>Acetic acid</subject><subject>Activated carbon</subject><subject>Adsorbents</subject><subject>Adsorption</subject><subject>Adsorptivity</subject><subject>Analysis</subject><subject>Aqueous solutions</subject><subject>Biology and Life Sciences</subject><subject>Charcoal</subject><subject>Chemical properties</subject><subject>Chemisorption</subject><subject>Composite materials</subject><subject>Composition</subject><subject>Contamination</subject><subject>Cummingtonite</subject><subject>Drinking water</subject><subject>Earth Sciences</subject><subject>Ecology and Environmental Sciences</subject><subject>Edetic Acid</subject><subject>Efficiency</subject><subject>Ethylenediaminetetraacetic acid</subject><subject>Ethylenediaminetetraacetic acids</subject><subject>Eucalyptus</subject><subject>Fresh water</subject><subject>Heavy metals</subject><subject>Hydroxides</subject><subject>Ions</subject><subject>Isotherms</subject><subject>Kinetics</subject><subject>Lead</subject><subject>Measurement</subject><subject>Medicine and Health Sciences</subject><subject>Physical Sciences</subject><subject>Research and Analysis Methods</subject><subject>Surface chemistry</subject><subject>Toxicity testing</subject><subject>Wastewater</subject><subject>Water</subject><subject>Water Pollutants, Chemical - 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Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Amin, M T</au><au>Alazba, A A</au><au>Shafiq, M</au><au>Bhatnagar, Amit</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ethylenediaminetetraacetate functionalized MgFe layered double hydroxide/biochar composites for highly efficient adsorptive removal of lead ions from aqueous solutions</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2022-03-03</date><risdate>2022</risdate><volume>17</volume><issue>3</issue><spage>e0265024</spage><epage>e0265024</epage><pages>e0265024-e0265024</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>The application of layered double hydroxides (LDHs) of MgFe and its composites with biochar of Eucalyptus camdulensis (Eb) and ethylenediaminetetraacetic acid (EDTA) was explored in a batch study to mitigate toxic lead ions (Pb2+) from synthetic wastewater solutions. SEM images revealed that MgFe/LDH composites with Eb were successfully formed, while FTIR spectra confirmed the successful adsorption of Pb2+ onto the MgFe/LDH and composite adsorbents. Batch equilibrium was attained after 60 min, then the adsorption capacity gradually increased. An increase in adsorption capacity (and a 60% decrease in the percentage removal) was observed by increasing the initial Pb2+ concentration, and the highest value was 136 mg g-1 for MgFe/LDH-Eb_EDTA. A 50-60% increase in both the adsorption capacities and percent removal was seen in the pH range of 2-6. The second-order kinetic model had a nearly perfect fitting, suggesting that chemisorption was the mechanism controlling adsorption. The Langmuir isotherm model best presented the adsorption data, suggesting that the Pb2+ adsorption was monolayer, and predicted a better affinity between the adsorbent surface and absorbed Pb2+ for MgFe/LDH-Eb_EDTA in comparison to the other two adsorbents. The D-R isotherm suggested that the adsorption system was physical based on E values for all three adsorbents, while the Temkin isotherm model suggested that Pb2+ adsorption was heterogeneous. Finally, the Sips and R-P isotherms predicted that the adsorption of Pb2+ on the surface of the adsorbents was homogeneous and heterogeneous.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>35239747</pmid><doi>10.1371/journal.pone.0265024</doi><tpages>e0265024</tpages><orcidid>https://orcid.org/0000-0001-8283-9958</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Acetic acid Activated carbon Adsorbents Adsorption Adsorptivity Analysis Aqueous solutions Biology and Life Sciences Charcoal Chemical properties Chemisorption Composite materials Composition Contamination Cummingtonite Drinking water Earth Sciences Ecology and Environmental Sciences Edetic Acid Efficiency Ethylenediaminetetraacetic acid Ethylenediaminetetraacetic acids Eucalyptus Fresh water Heavy metals Hydroxides Ions Isotherms Kinetics Lead Measurement Medicine and Health Sciences Physical Sciences Research and Analysis Methods Surface chemistry Toxicity testing Wastewater Water Water Pollutants, Chemical - analysis Water treatment |
| title | Ethylenediaminetetraacetate functionalized MgFe layered double hydroxide/biochar composites for highly efficient adsorptive removal of lead ions from aqueous solutions |
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