Coagulation behavior of Al(13) aggregates
The coagulation behavior of Al(13) aggregates formed in coagulation of kaolin was investigated by small angle static light scattering (SASLS), solid-state (27)Al NMR and tapping mode atomic force microscope (TM-AFM). A kaolin suspension was coagulated by PACl containing high content of Al(13) polyca...
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| Veröffentlicht in: | Water research (Oxford) 2008-10, Vol.42 (16), p.4281 |
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| creator | Lin, Jr-Lin Chin, Ching-Ju M Huang, Chihpin Pan, Jill R Wang, Dongsheng |
| description | The coagulation behavior of Al(13) aggregates formed in coagulation of kaolin was investigated by small angle static light scattering (SASLS), solid-state (27)Al NMR and tapping mode atomic force microscope (TM-AFM). A kaolin suspension was coagulated by PACl containing high content of Al(13) polycation (PACl-Al(13)). The results indicated that Al(13) was predominant in destabilizing kaolin particles for PACl-Al(13) coagulation even though at alkaline pH (pH 10). At such high pH, Al(13) aggregates were observed when the dosage of PACl-Al(13) was increased. In addition, the mechanism of coagulation by PACl-Al(13) at alkaline pH was affected by dosage. When the dosage was insufficient, coagulation was caused by electrostatic patch, which led to compact flocs with high fractal dimension (D(f)). Interparticle bridging dominated the coagulation when the coagulant dosage approached the plateau of adsorption, which caused the looser flocs with low D(f). The in-situ AFM scanning in liquid system proved that the existence of linear Al(13) aggregates composed of a chain of coiled Al(13) in coagulation by PACl-Al(13) at a high dosage and alkaline pH. Meanwhile, several coiled Al(13) aggregates with various dimensions were observed at such condition. |
| doi_str_mv | 10.1016/j.watres.2008.07.028 |
| format | Article |
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A kaolin suspension was coagulated by PACl containing high content of Al(13) polycation (PACl-Al(13)). The results indicated that Al(13) was predominant in destabilizing kaolin particles for PACl-Al(13) coagulation even though at alkaline pH (pH 10). At such high pH, Al(13) aggregates were observed when the dosage of PACl-Al(13) was increased. In addition, the mechanism of coagulation by PACl-Al(13) at alkaline pH was affected by dosage. When the dosage was insufficient, coagulation was caused by electrostatic patch, which led to compact flocs with high fractal dimension (D(f)). Interparticle bridging dominated the coagulation when the coagulant dosage approached the plateau of adsorption, which caused the looser flocs with low D(f). The in-situ AFM scanning in liquid system proved that the existence of linear Al(13) aggregates composed of a chain of coiled Al(13) in coagulation by PACl-Al(13) at a high dosage and alkaline pH. Meanwhile, several coiled Al(13) aggregates with various dimensions were observed at such condition.</description><identifier>ISSN: 0043-1354</identifier><identifier>DOI: 10.1016/j.watres.2008.07.028</identifier><identifier>PMID: 18715607</identifier><language>eng</language><publisher>England</publisher><subject>Adsorption ; Aluminum - chemistry ; Aluminum Silicates - chemistry ; Hydrogen-Ion Concentration ; Kaolin - chemistry ; Magnetic Resonance Spectroscopy ; Microscopy, Electron, Scanning ; Water Pollutants, Chemical - chemistry</subject><ispartof>Water research (Oxford), 2008-10, Vol.42 (16), p.4281</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,778,782,27911,27912</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18715607$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lin, Jr-Lin</creatorcontrib><creatorcontrib>Chin, Ching-Ju M</creatorcontrib><creatorcontrib>Huang, Chihpin</creatorcontrib><creatorcontrib>Pan, Jill R</creatorcontrib><creatorcontrib>Wang, Dongsheng</creatorcontrib><title>Coagulation behavior of Al(13) aggregates</title><title>Water research (Oxford)</title><addtitle>Water Res</addtitle><description>The coagulation behavior of Al(13) aggregates formed in coagulation of kaolin was investigated by small angle static light scattering (SASLS), solid-state (27)Al NMR and tapping mode atomic force microscope (TM-AFM). A kaolin suspension was coagulated by PACl containing high content of Al(13) polycation (PACl-Al(13)). The results indicated that Al(13) was predominant in destabilizing kaolin particles for PACl-Al(13) coagulation even though at alkaline pH (pH 10). At such high pH, Al(13) aggregates were observed when the dosage of PACl-Al(13) was increased. In addition, the mechanism of coagulation by PACl-Al(13) at alkaline pH was affected by dosage. When the dosage was insufficient, coagulation was caused by electrostatic patch, which led to compact flocs with high fractal dimension (D(f)). Interparticle bridging dominated the coagulation when the coagulant dosage approached the plateau of adsorption, which caused the looser flocs with low D(f). The in-situ AFM scanning in liquid system proved that the existence of linear Al(13) aggregates composed of a chain of coiled Al(13) in coagulation by PACl-Al(13) at a high dosage and alkaline pH. Meanwhile, several coiled Al(13) aggregates with various dimensions were observed at such condition.</description><subject>Adsorption</subject><subject>Aluminum - chemistry</subject><subject>Aluminum Silicates - chemistry</subject><subject>Hydrogen-Ion Concentration</subject><subject>Kaolin - chemistry</subject><subject>Magnetic Resonance Spectroscopy</subject><subject>Microscopy, Electron, Scanning</subject><subject>Water Pollutants, Chemical - chemistry</subject><issn>0043-1354</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNo1jrFOwzAUAD2AaCn8AUIZ6ZD02c-O7bGKKCBV6tK9eo6dkColkZ2C-HsqAcvddjrGHjgUHHi5OhZfNMWQCgFgCtAFCHPF5gASc45KzthtSkcAEALtDZtxo7kqQc_ZshqoPfc0dcNH5sI7fXZDzIYmW_dPHJcZtW0MLU0h3bHrhvoU7v-8YPvN8756zbe7l7dqvc1HJXVujRRUe2m4vxAJ0Vth0bpSyGBLCMK6ulaycdoJ8LIxYI33BPbyqUzABXv8zY5ndwr-MMbuRPH78L-MP_XcQTA</recordid><startdate>200810</startdate><enddate>200810</enddate><creator>Lin, Jr-Lin</creator><creator>Chin, Ching-Ju M</creator><creator>Huang, Chihpin</creator><creator>Pan, Jill R</creator><creator>Wang, Dongsheng</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope></search><sort><creationdate>200810</creationdate><title>Coagulation behavior of Al(13) aggregates</title><author>Lin, Jr-Lin ; Chin, Ching-Ju M ; Huang, Chihpin ; Pan, Jill R ; Wang, Dongsheng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p547-9842acd481dcd43a33d92939b624e960e29bcc54fb7b20d4f8098dda0913558e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Adsorption</topic><topic>Aluminum - chemistry</topic><topic>Aluminum Silicates - chemistry</topic><topic>Hydrogen-Ion Concentration</topic><topic>Kaolin - chemistry</topic><topic>Magnetic Resonance Spectroscopy</topic><topic>Microscopy, Electron, Scanning</topic><topic>Water Pollutants, Chemical - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lin, Jr-Lin</creatorcontrib><creatorcontrib>Chin, Ching-Ju M</creatorcontrib><creatorcontrib>Huang, Chihpin</creatorcontrib><creatorcontrib>Pan, Jill R</creatorcontrib><creatorcontrib>Wang, Dongsheng</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><jtitle>Water research (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lin, Jr-Lin</au><au>Chin, Ching-Ju M</au><au>Huang, Chihpin</au><au>Pan, Jill R</au><au>Wang, Dongsheng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Coagulation behavior of Al(13) aggregates</atitle><jtitle>Water research (Oxford)</jtitle><addtitle>Water Res</addtitle><date>2008-10</date><risdate>2008</risdate><volume>42</volume><issue>16</issue><spage>4281</spage><pages>4281-</pages><issn>0043-1354</issn><abstract>The coagulation behavior of Al(13) aggregates formed in coagulation of kaolin was investigated by small angle static light scattering (SASLS), solid-state (27)Al NMR and tapping mode atomic force microscope (TM-AFM). A kaolin suspension was coagulated by PACl containing high content of Al(13) polycation (PACl-Al(13)). The results indicated that Al(13) was predominant in destabilizing kaolin particles for PACl-Al(13) coagulation even though at alkaline pH (pH 10). At such high pH, Al(13) aggregates were observed when the dosage of PACl-Al(13) was increased. In addition, the mechanism of coagulation by PACl-Al(13) at alkaline pH was affected by dosage. When the dosage was insufficient, coagulation was caused by electrostatic patch, which led to compact flocs with high fractal dimension (D(f)). Interparticle bridging dominated the coagulation when the coagulant dosage approached the plateau of adsorption, which caused the looser flocs with low D(f). The in-situ AFM scanning in liquid system proved that the existence of linear Al(13) aggregates composed of a chain of coiled Al(13) in coagulation by PACl-Al(13) at a high dosage and alkaline pH. Meanwhile, several coiled Al(13) aggregates with various dimensions were observed at such condition.</abstract><cop>England</cop><pmid>18715607</pmid><doi>10.1016/j.watres.2008.07.028</doi></addata></record> |
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| ispartof | Water research (Oxford), 2008-10, Vol.42 (16), p.4281 |
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| language | eng |
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| source | MEDLINE; ScienceDirect Journals (5 years ago - present) |
| subjects | Adsorption Aluminum - chemistry Aluminum Silicates - chemistry Hydrogen-Ion Concentration Kaolin - chemistry Magnetic Resonance Spectroscopy Microscopy, Electron, Scanning Water Pollutants, Chemical - chemistry |
| title | Coagulation behavior of Al(13) aggregates |
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