Adsorption of Pb2+, Cu2+ and Cd2+ by sulfhydryl modified chitosan beads
A chitosan-based bead was synthesized by crosslinking as well as sulfhydryl modification reaction and its removal ability of Pb2+, Cu2+ and Cd2+ was investigated. The test results showed that the crystal structure of chitosan was destroyed completely and the specific surface area was greatly increas...
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| Veröffentlicht in: | Carbohydrate polymers 2021-11, Vol.274, p.118622-118622, Article 118622 |
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| container_title | Carbohydrate polymers |
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| creator | Yang, Yuru Zeng, Lei Lin, Zongkun Jiang, Huabin Zhang, Aiping |
| description | A chitosan-based bead was synthesized by crosslinking as well as sulfhydryl modification reaction and its removal ability of Pb2+, Cu2+ and Cd2+ was investigated. The test results showed that the crystal structure of chitosan was destroyed completely and the specific surface area was greatly increased after modification. The adsorption of Pb2+, Cu2+ and Cd2+ by the beads was carried out at different pH, ionic strength, contact time and initial concentration and the maximum adsorption capacities were 273.7 mg/g, 163.3 mg/g and 183.1 mg/g, respectively. Furthermore, due to the large ion radius of Pb2+, its adsorption was seriously disturbed by other ions in the competitive adsorption process. Finally, the adsorption processes of Pb2+, Cu2+ and Cd2+ were well fitted by the Langmuir isotherm model and the pseudo second-order kinetics model, respectively. Combined with the results of X-ray photoelectron spectroscopy, chemical coordination is the main adsorption mechanism.
•Synthesis of DMSA-CS beads through crosslinking and sulfhydryl modification.•DMSA-CS beads have a good removeeffect on Pb2+, Cu2+ and Cd2+ in a wide pH range.•The adsorption processes were fitted by different isotherms and kinetic models. |
| doi_str_mv | 10.1016/j.carbpol.2021.118622 |
| format | Article |
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•Synthesis of DMSA-CS beads through crosslinking and sulfhydryl modification.•DMSA-CS beads have a good removeeffect on Pb2+, Cu2+ and Cd2+ in a wide pH range.•The adsorption processes were fitted by different isotherms and kinetic models.</description><identifier>ISSN: 0144-8617</identifier><identifier>EISSN: 1879-1344</identifier><identifier>DOI: 10.1016/j.carbpol.2021.118622</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Adsorption ; Chitosan ; Heavy metal ions ; Kinetics and isotherms ; Meso-23-dimercaptosuccinic acid</subject><ispartof>Carbohydrate polymers, 2021-11, Vol.274, p.118622-118622, Article 118622</ispartof><rights>2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c272t-5a4891fdfe90982ddbc500bdcdc80a7a49d191a8e543dd2210b0cce3edda476b3</citedby><cites>FETCH-LOGICAL-c272t-5a4891fdfe90982ddbc500bdcdc80a7a49d191a8e543dd2210b0cce3edda476b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.carbpol.2021.118622$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Yang, Yuru</creatorcontrib><creatorcontrib>Zeng, Lei</creatorcontrib><creatorcontrib>Lin, Zongkun</creatorcontrib><creatorcontrib>Jiang, Huabin</creatorcontrib><creatorcontrib>Zhang, Aiping</creatorcontrib><title>Adsorption of Pb2+, Cu2+ and Cd2+ by sulfhydryl modified chitosan beads</title><title>Carbohydrate polymers</title><description>A chitosan-based bead was synthesized by crosslinking as well as sulfhydryl modification reaction and its removal ability of Pb2+, Cu2+ and Cd2+ was investigated. The test results showed that the crystal structure of chitosan was destroyed completely and the specific surface area was greatly increased after modification. The adsorption of Pb2+, Cu2+ and Cd2+ by the beads was carried out at different pH, ionic strength, contact time and initial concentration and the maximum adsorption capacities were 273.7 mg/g, 163.3 mg/g and 183.1 mg/g, respectively. Furthermore, due to the large ion radius of Pb2+, its adsorption was seriously disturbed by other ions in the competitive adsorption process. Finally, the adsorption processes of Pb2+, Cu2+ and Cd2+ were well fitted by the Langmuir isotherm model and the pseudo second-order kinetics model, respectively. Combined with the results of X-ray photoelectron spectroscopy, chemical coordination is the main adsorption mechanism.
•Synthesis of DMSA-CS beads through crosslinking and sulfhydryl modification.•DMSA-CS beads have a good removeeffect on Pb2+, Cu2+ and Cd2+ in a wide pH range.•The adsorption processes were fitted by different isotherms and kinetic models.</description><subject>Adsorption</subject><subject>Chitosan</subject><subject>Heavy metal ions</subject><subject>Kinetics and isotherms</subject><subject>Meso-23-dimercaptosuccinic acid</subject><issn>0144-8617</issn><issn>1879-1344</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFkMFLwzAYxYMoOKd_gpCjMFuTNG3Tk4yiUxjoQc8hyZeyjK6pSSvsv7eju_su3zu89-D7IXRPSUoJLZ72qVFB975NGWE0pVQUjF2gBRVlldCM80u0IJTzRBS0vEY3Me7JpIKSBdqsIfrQD8532Df4U7PVI65HtsKqA1zDZPQRx7FtdkcIxxYfPLjGWcBm5wYfVYe1VRBv0VWj2mjvzneJvl9fvuq3ZPuxea_X28Swkg1JrrioaAONrUglGIA2OSEaDBhBVKl4BbSiSticZwCMUaKJMTazAIqXhc6W6GHe7YP_GW0c5MFFY9tWddaPUbJcFFWVkSKfovkcNcHHGGwj--AOKhwlJfIETu7lGZw8gZMzuKn3PPfs9Mevs0FG42xnLLhgzSDBu38W_gB6hXgp</recordid><startdate>20211115</startdate><enddate>20211115</enddate><creator>Yang, Yuru</creator><creator>Zeng, Lei</creator><creator>Lin, Zongkun</creator><creator>Jiang, Huabin</creator><creator>Zhang, Aiping</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20211115</creationdate><title>Adsorption of Pb2+, Cu2+ and Cd2+ by sulfhydryl modified chitosan beads</title><author>Yang, Yuru ; Zeng, Lei ; Lin, Zongkun ; Jiang, Huabin ; Zhang, Aiping</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c272t-5a4891fdfe90982ddbc500bdcdc80a7a49d191a8e543dd2210b0cce3edda476b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Adsorption</topic><topic>Chitosan</topic><topic>Heavy metal ions</topic><topic>Kinetics and isotherms</topic><topic>Meso-23-dimercaptosuccinic acid</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yang, Yuru</creatorcontrib><creatorcontrib>Zeng, Lei</creatorcontrib><creatorcontrib>Lin, Zongkun</creatorcontrib><creatorcontrib>Jiang, Huabin</creatorcontrib><creatorcontrib>Zhang, Aiping</creatorcontrib><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Carbohydrate polymers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yang, Yuru</au><au>Zeng, Lei</au><au>Lin, Zongkun</au><au>Jiang, Huabin</au><au>Zhang, Aiping</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Adsorption of Pb2+, Cu2+ and Cd2+ by sulfhydryl modified chitosan beads</atitle><jtitle>Carbohydrate polymers</jtitle><date>2021-11-15</date><risdate>2021</risdate><volume>274</volume><spage>118622</spage><epage>118622</epage><pages>118622-118622</pages><artnum>118622</artnum><issn>0144-8617</issn><eissn>1879-1344</eissn><abstract>A chitosan-based bead was synthesized by crosslinking as well as sulfhydryl modification reaction and its removal ability of Pb2+, Cu2+ and Cd2+ was investigated. The test results showed that the crystal structure of chitosan was destroyed completely and the specific surface area was greatly increased after modification. The adsorption of Pb2+, Cu2+ and Cd2+ by the beads was carried out at different pH, ionic strength, contact time and initial concentration and the maximum adsorption capacities were 273.7 mg/g, 163.3 mg/g and 183.1 mg/g, respectively. Furthermore, due to the large ion radius of Pb2+, its adsorption was seriously disturbed by other ions in the competitive adsorption process. Finally, the adsorption processes of Pb2+, Cu2+ and Cd2+ were well fitted by the Langmuir isotherm model and the pseudo second-order kinetics model, respectively. Combined with the results of X-ray photoelectron spectroscopy, chemical coordination is the main adsorption mechanism.
•Synthesis of DMSA-CS beads through crosslinking and sulfhydryl modification.•DMSA-CS beads have a good removeeffect on Pb2+, Cu2+ and Cd2+ in a wide pH range.•The adsorption processes were fitted by different isotherms and kinetic models.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.carbpol.2021.118622</doi><tpages>1</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Adsorption Chitosan Heavy metal ions Kinetics and isotherms Meso-23-dimercaptosuccinic acid |
| title | Adsorption of Pb2+, Cu2+ and Cd2+ by sulfhydryl modified chitosan beads |
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