Combining material characterization with single and multi-oxyanion adsorption for mechanistic study of chromate removal by cationic hydrogel
Cationic hydrogel with magnetic property was synthesized via radical polymerization and its removal capacity of chromate from contaminated water was found to be 200 mg/g.Using Fourier transform infrared spectroscopy（FT-IR） study,the mechanism of chromate removal by hydrogel was found to be non-speci...
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| Veröffentlicht in: | Journal of environmental sciences (China) 2011-01, Vol.23 (6), p.1004-1010 |
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| creator | Lo, Irene M.C. Yin, Ke Tang, Samuel C.N. |
| description | Cationic hydrogel with magnetic property was synthesized via radical polymerization and its removal capacity of chromate from contaminated water was found to be 200 mg/g.Using Fourier transform infrared spectroscopy（FT-IR） study,the mechanism of chromate removal by hydrogel was found to be non-specific adsorption,mainly due to ion exchange,as evidenced by the positively charged functional group,trimethyl ammonium-N＋（CH3）3,in the monomer.Verifications were accordingly determined by testing di？erent oxyanion adsorption onto the hydrogel.The results of the chromate adsorption experiments illustrated that the amount of chromate adsorbed was nearly equal to that of the chloride released from the hydrogel,which is part of the evidence for ion exchange.Single and multi-oxyanion adsorption experiments were also performed,and it was demonstrated that ion removal was species independent,but charge dependent,another characteristic of the ion exchange process.It was found that the same Langmuir model can be applied to best fit the findings of single and multi-oxyanion adsorption,which further indicates the mechanism of chromate removal is attributed to ion exchange.In view of the above,the background anions compete for adsorption sites with chromate,evidenced by inhibitive chromate removal in the presence of background electrolytes in the batch studies,further echoing the ion exchange mechanism. |
| doi_str_mv | 10.1016/S1001-0742(10)60507-4 |
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All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c477t-642542ae2e8a3e4aa070945b6880ebc72c3ce6833545dbea7c05e3a1a99048623</citedby><cites>FETCH-LOGICAL-c477t-642542ae2e8a3e4aa070945b6880ebc72c3ce6833545dbea7c05e3a1a99048623</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/85265X/85265X.jpg</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S1001-0742(10)60507-4$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,782,786,3552,27931,27932,46002</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22066224$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lo, Irene M.C.</creatorcontrib><creatorcontrib>Yin, Ke</creatorcontrib><creatorcontrib>Tang, Samuel C.N.</creatorcontrib><title>Combining material characterization with single and multi-oxyanion adsorption for mechanistic study of chromate removal by cationic hydrogel</title><title>Journal of environmental sciences (China)</title><addtitle>Journal of Environmental Sciences</addtitle><description>Cationic hydrogel with magnetic property was synthesized via radical polymerization and its removal capacity of chromate from contaminated water was found to be 200 mg/g.Using Fourier transform infrared spectroscopy（FT-IR） study,the mechanism of chromate removal by hydrogel was found to be non-specific adsorption,mainly due to ion exchange,as evidenced by the positively charged functional group,trimethyl ammonium-N＋（CH3）3,in the monomer.Verifications were accordingly determined by testing di？erent oxyanion adsorption onto the hydrogel.The results of the chromate adsorption experiments illustrated that the amount of chromate adsorbed was nearly equal to that of the chloride released from the hydrogel,which is part of the evidence for ion exchange.Single and multi-oxyanion adsorption experiments were also performed,and it was demonstrated that ion removal was species independent,but charge dependent,another characteristic of the ion exchange process.It was found that the same Langmuir model can be applied to best fit the findings of single and multi-oxyanion adsorption,which further indicates the mechanism of chromate removal is attributed to ion exchange.In view of the above,the background anions compete for adsorption sites with chromate,evidenced by inhibitive chromate removal in the presence of background electrolytes in the batch studies,further echoing the ion exchange mechanism.</description><subject>Adsorption</subject><subject>anions</subject><subject>Anions - chemistry</subject><subject>Cations - chemistry</subject><subject>Chromates - chemistry</subject><subject>electrolytes</subject><subject>Fourier transform infrared spectroscopy</subject><subject>hydrocolloids</subject><subject>Hydrogels - chemistry</subject><subject>ion exchange</subject><subject>magnetic hydrogel</subject><subject>magnetic properties</subject><subject>mechanism</subject><subject>oxyanion</subject><subject>polymerization</subject><subject>sorption isotherms</subject><subject>Water Pollutants, Chemical - chemistry</subject><subject>water pollution</subject><subject>Water Purification - methods</subject><subject>凝胶相</subject><subject>去除机理</subject><subject>材料特性</subject><subject>氧离子</subject><subject>离子交换过程</subject><subject>离子吸附</subject><subject>铬酸盐</subject><subject>阳离子</subject><issn>1001-0742</issn><issn>1878-7320</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkstu1DAUhiMEoqXwCEDYcFkEjh07TlYIjbhJlViUrq0T52TGo8Ru7aRleAYeGmdm2m1Xvn3n_4_9O8teMvjIgFWfLhgAK0AJ_p7BhwokqEI8yk5ZrepClRwep_kdcpI9i3ELAEKCfJqdcA5Vxbk4zf6t_NhaZ906H3GiYHHIzQYDmmXxFyfrXX5rp00eEzNQjq7Lx3mYbOH_7NAtx9hFH672ZO9DPlIScDZO1uRxmrtd7vukGfxikAca_U0yaXe52asnarPrgl_T8Dx70uMQ6cVxPMsuv339vfpRnP_6_nP15bwwQqmpqASXgiNxqrEkgQgKGiHbqq6BWqO4KQ1VdVlKIbuWUBmQVCLDpgFRV7w8y94edG_R9ejWeuvn4JKj3lLUxIExqICpBL47gFfBX88UJz3aaGgY0JGfo26gZKJmkj1I1qm3RikhEykPpAk-xkC9vgp2xLDTDPQSrd5Hq5fclq19tFqkuldHh7kdqbuvussyAa8PQI9e4zrYqC8v0l0kAGfJvUnE5wNB6XFvLAUdjSVnqLOBzKQ7bx9s4s2x-Y136-v0Je77KGsmRHIr_wOO7clL</recordid><startdate>20110101</startdate><enddate>20110101</enddate><creator>Lo, Irene M.C.</creator><creator>Yin, Ke</creator><creator>Tang, Samuel C.N.</creator><general>Elsevier B.V</general><general>Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>FBQ</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7TV</scope><scope>C1K</scope><scope>SOI</scope><scope>7X8</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope></search><sort><creationdate>20110101</creationdate><title>Combining material characterization with single and multi-oxyanion adsorption for mechanistic study of chromate removal by cationic hydrogel</title><author>Lo, Irene M.C. ; Yin, Ke ; Tang, Samuel C.N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c477t-642542ae2e8a3e4aa070945b6880ebc72c3ce6833545dbea7c05e3a1a99048623</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Adsorption</topic><topic>anions</topic><topic>Anions - chemistry</topic><topic>Cations - chemistry</topic><topic>Chromates - chemistry</topic><topic>electrolytes</topic><topic>Fourier transform infrared spectroscopy</topic><topic>hydrocolloids</topic><topic>Hydrogels - chemistry</topic><topic>ion exchange</topic><topic>magnetic hydrogel</topic><topic>magnetic properties</topic><topic>mechanism</topic><topic>oxyanion</topic><topic>polymerization</topic><topic>sorption isotherms</topic><topic>Water Pollutants, Chemical - chemistry</topic><topic>water pollution</topic><topic>Water Purification - methods</topic><topic>凝胶相</topic><topic>去除机理</topic><topic>材料特性</topic><topic>氧离子</topic><topic>离子交换过程</topic><topic>离子吸附</topic><topic>铬酸盐</topic><topic>阳离子</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lo, Irene M.C.</creatorcontrib><creatorcontrib>Yin, Ke</creatorcontrib><creatorcontrib>Tang, Samuel C.N.</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>AGRIS</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>MEDLINE - Academic</collection><collection>Wanfang Data Journals - Hong Kong</collection><collection>WANFANG Data Centre</collection><collection>Wanfang Data Journals</collection><collection>万方数据期刊 - 香港版</collection><collection>China Online Journals (COJ)</collection><collection>China Online Journals (COJ)</collection><jtitle>Journal of environmental sciences (China)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lo, Irene M.C.</au><au>Yin, Ke</au><au>Tang, Samuel C.N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Combining material characterization with single and multi-oxyanion adsorption for mechanistic study of chromate removal by cationic hydrogel</atitle><jtitle>Journal of environmental sciences (China)</jtitle><addtitle>Journal of Environmental Sciences</addtitle><date>2011-01-01</date><risdate>2011</risdate><volume>23</volume><issue>6</issue><spage>1004</spage><epage>1010</epage><pages>1004-1010</pages><issn>1001-0742</issn><eissn>1878-7320</eissn><abstract>Cationic hydrogel with magnetic property was synthesized via radical polymerization and its removal capacity of chromate from contaminated water was found to be 200 mg/g.Using Fourier transform infrared spectroscopy（FT-IR） study,the mechanism of chromate removal by hydrogel was found to be non-specific adsorption,mainly due to ion exchange,as evidenced by the positively charged functional group,trimethyl ammonium-N＋（CH3）3,in the monomer.Verifications were accordingly determined by testing di？erent oxyanion adsorption onto the hydrogel.The results of the chromate adsorption experiments illustrated that the amount of chromate adsorbed was nearly equal to that of the chloride released from the hydrogel,which is part of the evidence for ion exchange.Single and multi-oxyanion adsorption experiments were also performed,and it was demonstrated that ion removal was species independent,but charge dependent,another characteristic of the ion exchange process.It was found that the same Langmuir model can be applied to best fit the findings of single and multi-oxyanion adsorption,which further indicates the mechanism of chromate removal is attributed to ion exchange.In view of the above,the background anions compete for adsorption sites with chromate,evidenced by inhibitive chromate removal in the presence of background electrolytes in the batch studies,further echoing the ion exchange mechanism.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>22066224</pmid><doi>10.1016/S1001-0742(10)60507-4</doi><tpages>7</tpages></addata></record> |
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| ispartof | Journal of environmental sciences (China), 2011-01, Vol.23 (6), p.1004-1010 |
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| language | eng |
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| source | MEDLINE; Access via ScienceDirect (Elsevier); Alma/SFX Local Collection |
| subjects | Adsorption anions Anions - chemistry Cations - chemistry Chromates - chemistry electrolytes Fourier transform infrared spectroscopy hydrocolloids Hydrogels - chemistry ion exchange magnetic hydrogel magnetic properties mechanism oxyanion polymerization sorption isotherms Water Pollutants, Chemical - chemistry water pollution Water Purification - methods 凝胶相 去除机理 材料特性 氧离子 离子交换过程 离子吸附 铬酸盐 阳离子 |
| title | Combining material characterization with single and multi-oxyanion adsorption for mechanistic study of chromate removal by cationic hydrogel |
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