Adsorption Characteristics of Stone-Bentonite Mixtures towards Zn: Equilibrium and Kinetic Tests
In the treatment of industrial polluted sites and the construction of landfill sites, anti-pollution barriers are usually used to prevent the diffusion of pollutants. In this paper, the adsorption characteristics of Zn ions by the rock-bentonite anti-pollution barrier were observed by means of stati...
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| Veröffentlicht in: | Processes 2021-04, Vol.9 (4), p.619 |
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| creator | Xu, Sifa Fu, Yajun Wei, Weiwei Li, Cuifeng Bian, Mengdan Wang, Zhe |
| description | In the treatment of industrial polluted sites and the construction of landfill sites, anti-pollution barriers are usually used to prevent the diffusion of pollutants. In this paper, the adsorption characteristics of Zn ions by the rock-bentonite anti-pollution barrier were observed by means of static equilibrium and dynamic adsorption tests. The experimental results showed that the adsorption of Zn by stone chips—bentonite was close to the nonlinear Freundlich and Langmuir models. When the concentration of Zn ion is constant, the adsorption capacity increases with the increase in temperature. At a certain temperature, the adsorption removal rate decreases with the increase in concentration. Further study found that the adsorption of Zn from mixed soil was mainly an ion exchange process, and the adsorption mode of Zn from mixed soil was controlled by both intra-particle diffusion and membrane diffusion. Zeta potential, X-ray diffraction (XRD) and The Fourier Transform Infrared spectroscopy (FTIR) showed that with the increase in concentration, the mixed soil adsorbed more metal ions, and the thickness of the double electric layer decreased. Moreover, the adsorption of Zn2+ by bentonite was mainly interlayer adsorption and ion exchange. As an anti-pollution barrier material, the mixed soil of stone chips -bentonite can prevent the diffusion of pollutants, which has certain reference significance for engineering construction. |
| doi_str_mv | 10.3390/pr9040619 |
| format | Article |
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In this paper, the adsorption characteristics of Zn ions by the rock-bentonite anti-pollution barrier were observed by means of static equilibrium and dynamic adsorption tests. The experimental results showed that the adsorption of Zn by stone chips—bentonite was close to the nonlinear Freundlich and Langmuir models. When the concentration of Zn ion is constant, the adsorption capacity increases with the increase in temperature. At a certain temperature, the adsorption removal rate decreases with the increase in concentration. Further study found that the adsorption of Zn from mixed soil was mainly an ion exchange process, and the adsorption mode of Zn from mixed soil was controlled by both intra-particle diffusion and membrane diffusion. Zeta potential, X-ray diffraction (XRD) and The Fourier Transform Infrared spectroscopy (FTIR) showed that with the increase in concentration, the mixed soil adsorbed more metal ions, and the thickness of the double electric layer decreased. Moreover, the adsorption of Zn2+ by bentonite was mainly interlayer adsorption and ion exchange. As an anti-pollution barrier material, the mixed soil of stone chips -bentonite can prevent the diffusion of pollutants, which has certain reference significance for engineering construction.</description><identifier>ISSN: 2227-9717</identifier><identifier>EISSN: 2227-9717</identifier><identifier>DOI: 10.3390/pr9040619</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Adsorption ; Bentonite ; Construction sites ; Diffusion ; Diffusion barriers ; Equilibrium ; Fourier transforms ; Infrared spectroscopy ; Interlayers ; Ion exchange ; Kinetics ; Landfill construction ; Metal ions ; Metals ; Particle diffusion ; Pollutants ; Pollution ; Pollution abatement ; Soil pollution ; Soils ; Static equilibrium ; Stone ; X-ray diffraction ; Zeta potential ; Zinc</subject><ispartof>Processes, 2021-04, Vol.9 (4), p.619</ispartof><rights>2021 by the authors. 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/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c252t-bf0f80aaca92e1bcac67f3fd860ae776be316f6d4ff63df354a003e56b50438b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Xu, Sifa</creatorcontrib><creatorcontrib>Fu, Yajun</creatorcontrib><creatorcontrib>Wei, Weiwei</creatorcontrib><creatorcontrib>Li, Cuifeng</creatorcontrib><creatorcontrib>Bian, Mengdan</creatorcontrib><creatorcontrib>Wang, Zhe</creatorcontrib><title>Adsorption Characteristics of Stone-Bentonite Mixtures towards Zn: Equilibrium and Kinetic Tests</title><title>Processes</title><description>In the treatment of industrial polluted sites and the construction of landfill sites, anti-pollution barriers are usually used to prevent the diffusion of pollutants. In this paper, the adsorption characteristics of Zn ions by the rock-bentonite anti-pollution barrier were observed by means of static equilibrium and dynamic adsorption tests. The experimental results showed that the adsorption of Zn by stone chips—bentonite was close to the nonlinear Freundlich and Langmuir models. When the concentration of Zn ion is constant, the adsorption capacity increases with the increase in temperature. At a certain temperature, the adsorption removal rate decreases with the increase in concentration. Further study found that the adsorption of Zn from mixed soil was mainly an ion exchange process, and the adsorption mode of Zn from mixed soil was controlled by both intra-particle diffusion and membrane diffusion. Zeta potential, X-ray diffraction (XRD) and The Fourier Transform Infrared spectroscopy (FTIR) showed that with the increase in concentration, the mixed soil adsorbed more metal ions, and the thickness of the double electric layer decreased. Moreover, the adsorption of Zn2+ by bentonite was mainly interlayer adsorption and ion exchange. As an anti-pollution barrier material, the mixed soil of stone chips -bentonite can prevent the diffusion of pollutants, which has certain reference significance for engineering construction.</description><subject>Adsorption</subject><subject>Bentonite</subject><subject>Construction sites</subject><subject>Diffusion</subject><subject>Diffusion barriers</subject><subject>Equilibrium</subject><subject>Fourier transforms</subject><subject>Infrared spectroscopy</subject><subject>Interlayers</subject><subject>Ion exchange</subject><subject>Kinetics</subject><subject>Landfill construction</subject><subject>Metal ions</subject><subject>Metals</subject><subject>Particle diffusion</subject><subject>Pollutants</subject><subject>Pollution</subject><subject>Pollution abatement</subject><subject>Soil pollution</subject><subject>Soils</subject><subject>Static equilibrium</subject><subject>Stone</subject><subject>X-ray diffraction</subject><subject>Zeta potential</subject><subject>Zinc</subject><issn>2227-9717</issn><issn>2227-9717</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNpNkD1PwzAYhC0EElXpwD-wxMQQeG3HTsJWovIhihgoC0twHFu4au3UdgT8e4KKELfcDY_upEPolMAFYxVc9qGCHASpDtCEUlpkVUGKw3_5GM1iXMOoirCSiwl6m3fRhz5Z73D9LoNUSQcbk1URe4Ofk3c6u9ZudJs0frSfaQg64uQ_ZOgifnVXeLEb7Ma2wQ5bLF2HH6zTYwFe6ZjiCToychP17Nen6OVmsarvsuXT7X09X2aKcpqy1oApQUolK6pJq6QShWGmKwVIXRSi1YwII7rcGME6w3guAZjmouWQs7JlU3S27-2D3w3jcrP2Q3DjZEM5A8IpKclIne8pFXyMQZumD3Yrw1dDoPn5sPn7kH0DSLBlPw</recordid><startdate>20210401</startdate><enddate>20210401</enddate><creator>Xu, Sifa</creator><creator>Fu, Yajun</creator><creator>Wei, Weiwei</creator><creator>Li, Cuifeng</creator><creator>Bian, Mengdan</creator><creator>Wang, Zhe</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>LK8</scope><scope>M7P</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20210401</creationdate><title>Adsorption Characteristics of Stone-Bentonite Mixtures towards Zn: Equilibrium and Kinetic Tests</title><author>Xu, Sifa ; Fu, Yajun ; Wei, Weiwei ; Li, Cuifeng ; Bian, Mengdan ; Wang, Zhe</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c252t-bf0f80aaca92e1bcac67f3fd860ae776be316f6d4ff63df354a003e56b50438b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Adsorption</topic><topic>Bentonite</topic><topic>Construction sites</topic><topic>Diffusion</topic><topic>Diffusion barriers</topic><topic>Equilibrium</topic><topic>Fourier transforms</topic><topic>Infrared spectroscopy</topic><topic>Interlayers</topic><topic>Ion exchange</topic><topic>Kinetics</topic><topic>Landfill construction</topic><topic>Metal ions</topic><topic>Metals</topic><topic>Particle diffusion</topic><topic>Pollutants</topic><topic>Pollution</topic><topic>Pollution abatement</topic><topic>Soil pollution</topic><topic>Soils</topic><topic>Static equilibrium</topic><topic>Stone</topic><topic>X-ray diffraction</topic><topic>Zeta potential</topic><topic>Zinc</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Xu, Sifa</creatorcontrib><creatorcontrib>Fu, Yajun</creatorcontrib><creatorcontrib>Wei, Weiwei</creatorcontrib><creatorcontrib>Li, Cuifeng</creatorcontrib><creatorcontrib>Bian, Mengdan</creatorcontrib><creatorcontrib>Wang, Zhe</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>ProQuest Biological Science Collection</collection><collection>Biological Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>Processes</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Xu, Sifa</au><au>Fu, Yajun</au><au>Wei, Weiwei</au><au>Li, Cuifeng</au><au>Bian, Mengdan</au><au>Wang, Zhe</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Adsorption Characteristics of Stone-Bentonite Mixtures towards Zn: Equilibrium and Kinetic Tests</atitle><jtitle>Processes</jtitle><date>2021-04-01</date><risdate>2021</risdate><volume>9</volume><issue>4</issue><spage>619</spage><pages>619-</pages><issn>2227-9717</issn><eissn>2227-9717</eissn><abstract>In the treatment of industrial polluted sites and the construction of landfill sites, anti-pollution barriers are usually used to prevent the diffusion of pollutants. In this paper, the adsorption characteristics of Zn ions by the rock-bentonite anti-pollution barrier were observed by means of static equilibrium and dynamic adsorption tests. The experimental results showed that the adsorption of Zn by stone chips—bentonite was close to the nonlinear Freundlich and Langmuir models. When the concentration of Zn ion is constant, the adsorption capacity increases with the increase in temperature. At a certain temperature, the adsorption removal rate decreases with the increase in concentration. Further study found that the adsorption of Zn from mixed soil was mainly an ion exchange process, and the adsorption mode of Zn from mixed soil was controlled by both intra-particle diffusion and membrane diffusion. Zeta potential, X-ray diffraction (XRD) and The Fourier Transform Infrared spectroscopy (FTIR) showed that with the increase in concentration, the mixed soil adsorbed more metal ions, and the thickness of the double electric layer decreased. Moreover, the adsorption of Zn2+ by bentonite was mainly interlayer adsorption and ion exchange. As an anti-pollution barrier material, the mixed soil of stone chips -bentonite can prevent the diffusion of pollutants, which has certain reference significance for engineering construction.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/pr9040619</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Adsorption Bentonite Construction sites Diffusion Diffusion barriers Equilibrium Fourier transforms Infrared spectroscopy Interlayers Ion exchange Kinetics Landfill construction Metal ions Metals Particle diffusion Pollutants Pollution Pollution abatement Soil pollution Soils Static equilibrium Stone X-ray diffraction Zeta potential Zinc |
| title | Adsorption Characteristics of Stone-Bentonite Mixtures towards Zn: Equilibrium and Kinetic Tests |
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