Retention of toxic chromium from aqueous phase by H₃PO₄-activated lignin: Effect of salts and desorption studies
In this study, the feasibility of using H₃PO₄-activated lignin for hexavalent chromium adsorption has been investigated. The composite of activated lignin was characterized using FTIR, XRD and SEM with EDAX analysis. It was observed that the pH had a strong effect on the adsorption capacity; adsorpt...
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| Veröffentlicht in: | Desalination 2011-07, Vol.274 (1-3), p.64-73 |
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| container_title | Desalination |
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| creator | Albadarin, Ahmad B Al-Muhtaseb, Ala'a H Walker, Gavin M Allen, Stephen J Ahmad, Mohammad N.M |
| description | In this study, the feasibility of using H₃PO₄-activated lignin for hexavalent chromium adsorption has been investigated. The composite of activated lignin was characterized using FTIR, XRD and SEM with EDAX analysis. It was observed that the pH had a strong effect on the adsorption capacity; adsorption of Cr(VI) was more favorable at acidic pH with maximum uptake at pH 2. The adsorption equilibrium data were best represented by Koble–Corrigan isotherm. The monolayer sorption capacity obtained from the Langmuir model was found to be 77.85mg/g. Adsorption showed pseudo-second order rate kinetics and the process involving the rate-controlling step is complex as it involves both film and intraparticle diffusion processes. The NaOH desorbing agent was able to release approximately 84% of metal ions. Thermodynamic parameters showed that the sorption process is exothermic and non-spontaneous. The overall Cr(VI) retention on the activated lignin surface perhaps includes both the physical adsorption of Cr(VI) and the consequent reduction of Cr(VI) to Cr(III). |
| doi_str_mv | 10.1016/j.desal.2011.01.079 |
| format | Article |
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The composite of activated lignin was characterized using FTIR, XRD and SEM with EDAX analysis. It was observed that the pH had a strong effect on the adsorption capacity; adsorption of Cr(VI) was more favorable at acidic pH with maximum uptake at pH 2. The adsorption equilibrium data were best represented by Koble–Corrigan isotherm. The monolayer sorption capacity obtained from the Langmuir model was found to be 77.85mg/g. Adsorption showed pseudo-second order rate kinetics and the process involving the rate-controlling step is complex as it involves both film and intraparticle diffusion processes. The NaOH desorbing agent was able to release approximately 84% of metal ions. Thermodynamic parameters showed that the sorption process is exothermic and non-spontaneous. The overall Cr(VI) retention on the activated lignin surface perhaps includes both the physical adsorption of Cr(VI) and the consequent reduction of Cr(VI) to Cr(III).</description><subject>Activated</subject><subject>Adsorption</subject><subject>Applied sciences</subject><subject>Chemical engineering</subject><subject>Chromium</subject><subject>desalination</subject><subject>desorption</subject><subject>Diffusion rate</subject><subject>Exact sciences and technology</subject><subject>heat production</subject><subject>lignin</subject><subject>metal ions</subject><subject>Pollution</subject><subject>Reduction</subject><subject>salts</subject><subject>Sorption</subject><subject>sorption isotherms</subject><subject>Surface chemistry</subject><subject>toxicity</subject><issn>0011-9164</issn><issn>1873-4464</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNo9kM9qGzEQxkVJoE7SJ-ihuoSc1pVWu9KqtxDSumBISeqzGOuPI7NeOZIckqvbJ_WTVBuHwsAwzG--mfkQ-kzJlBLKv66nxibopzWhdEpKCPkBTWgnWNU0vDlBE1I6laS8-YjOUlqXspaMTVC-t9kO2YcBB4dzePEa68cYNn63wa5kDE87G3YJbx8hWbx8xbPD_s-vu8P-bwU6-2fI1uDerwY_fMO3zlmdR6lyTk4YBoPLaSFu31akvDPepgt06qBP9tN7PkeL77e_b2bV_O7Hz5vreaUZa3O1FEwb07ZCg-NE1lRIw8GCWDLWyMa0nWnBaqCWc91xpqFdatZYWruWAgV2jq6OutsYyhcpq41P2vY9DONLqhO8ZoLRrpDsSOoYUorWqW30G4ivihI1WqzW6s1iNVqsSAkhy9Tluz4kDb2LMGif_o_WDe1kLUfuy5FzEBSsYmEWD0WoJYRIQjrJ_gEFV4q7</recordid><startdate>20110701</startdate><enddate>20110701</enddate><creator>Albadarin, Ahmad B</creator><creator>Al-Muhtaseb, Ala'a H</creator><creator>Walker, Gavin M</creator><creator>Allen, Stephen J</creator><creator>Ahmad, Mohammad N.M</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>20110701</creationdate><title>Retention of toxic chromium from aqueous phase by H₃PO₄-activated lignin: Effect of salts and desorption studies</title><author>Albadarin, Ahmad B ; Al-Muhtaseb, Ala'a H ; Walker, Gavin M ; Allen, Stephen J ; Ahmad, Mohammad N.M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c335t-b73cdd557caf6092179d6aea7b33494d58d5aeca1e66c863ca5bc34e12f51a1a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Activated</topic><topic>Adsorption</topic><topic>Applied sciences</topic><topic>Chemical engineering</topic><topic>Chromium</topic><topic>desalination</topic><topic>desorption</topic><topic>Diffusion rate</topic><topic>Exact sciences and technology</topic><topic>heat production</topic><topic>lignin</topic><topic>metal ions</topic><topic>Pollution</topic><topic>Reduction</topic><topic>salts</topic><topic>Sorption</topic><topic>sorption isotherms</topic><topic>Surface chemistry</topic><topic>toxicity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Albadarin, Ahmad B</creatorcontrib><creatorcontrib>Al-Muhtaseb, Ala'a H</creatorcontrib><creatorcontrib>Walker, Gavin M</creatorcontrib><creatorcontrib>Allen, Stephen J</creatorcontrib><creatorcontrib>Ahmad, Mohammad N.M</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Desalination</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Albadarin, Ahmad B</au><au>Al-Muhtaseb, Ala'a H</au><au>Walker, Gavin M</au><au>Allen, Stephen J</au><au>Ahmad, Mohammad N.M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Retention of toxic chromium from aqueous phase by H₃PO₄-activated lignin: Effect of salts and desorption studies</atitle><jtitle>Desalination</jtitle><date>2011-07-01</date><risdate>2011</risdate><volume>274</volume><issue>1-3</issue><spage>64</spage><epage>73</epage><pages>64-73</pages><issn>0011-9164</issn><eissn>1873-4464</eissn><coden>DSLNAH</coden><abstract>In this study, the feasibility of using H₃PO₄-activated lignin for hexavalent chromium adsorption has been investigated. The composite of activated lignin was characterized using FTIR, XRD and SEM with EDAX analysis. It was observed that the pH had a strong effect on the adsorption capacity; adsorption of Cr(VI) was more favorable at acidic pH with maximum uptake at pH 2. The adsorption equilibrium data were best represented by Koble–Corrigan isotherm. The monolayer sorption capacity obtained from the Langmuir model was found to be 77.85mg/g. Adsorption showed pseudo-second order rate kinetics and the process involving the rate-controlling step is complex as it involves both film and intraparticle diffusion processes. The NaOH desorbing agent was able to release approximately 84% of metal ions. Thermodynamic parameters showed that the sorption process is exothermic and non-spontaneous. The overall Cr(VI) retention on the activated lignin surface perhaps includes both the physical adsorption of Cr(VI) and the consequent reduction of Cr(VI) to Cr(III).</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.desal.2011.01.079</doi><tpages>10</tpages></addata></record> |
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| subjects | Activated Adsorption Applied sciences Chemical engineering Chromium desalination desorption Diffusion rate Exact sciences and technology heat production lignin metal ions Pollution Reduction salts Sorption sorption isotherms Surface chemistry toxicity |
| title | Retention of toxic chromium from aqueous phase by H₃PO₄-activated lignin: Effect of salts and desorption studies |
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