On the strength and character of alumino-humic flocs
The paper describes the size, density and strength of flocs gained from a humic acid suspension coagulated with aluminium sulphate over a range of dose and pH. Flocs were generated on a continuous flow basis in an oscillatory mixer. Particle size measurements were gained using CCTV and image analysi...
Gespeichert in:
| Veröffentlicht in: | Water science and technology 1999, Vol.40 (9), p.81-88 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 88 |
|---|---|
| container_issue | 9 |
| container_start_page | 81 |
| container_title | Water science and technology |
| container_volume | 40 |
| creator | BACHE, D. H RASOOL, E MOFFAT, D MCGILLIGAN, F. J |
| description | The paper describes the size, density and strength of flocs gained from a humic acid suspension coagulated with aluminium sulphate over a range of dose and pH. Flocs were generated on a continuous flow basis in an oscillatory mixer. Particle size measurements were gained using CCTV and image analysis. From this, a maximum floc size (d95) was identified. A second series of experiments examined the floc sizes of the bulk precipitate alone under equivalent conditions. It was found that the overall floc sizes of the two suspensions were broadly similar, suggesting that the floc strength was dominated by a common bonding mechanism irrespective of the presence of the humic colloids. Some features of the size distribution in response to dose and pH were attributed to the influence of surface charge. Upper floc sizes were proportional to the Kolmogorov length (η) with d95/η ∼1. For typical levels of mixing, the floc strength was estimated to be on the order of 0.1 N m−2. By analysing the breakage kinetics in energy terms and relating the strength to the density of individual floc, a physically-based structural model was developed to explain the response of the floc size to the prevailing state of mixing. |
| doi_str_mv | 10.1016/S0273-1223(99)00643-5 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_17683877</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>17456248</sourcerecordid><originalsourceid>FETCH-LOGICAL-c285t-741f7fff91ba5e74991cb2b2ccd6a58bd19f40628cce21b2056416bd3706c5c23</originalsourceid><addsrcrecordid>eNqNkEtLxDAYRYMPcGb0JwgFRXRRzZd3ljL4goFZqOuQpomdodOOSbvw39t5oODK1d2ce-EehM4B3wIGcfeKiaQ5EEKvtb7BWDCa8wM0Aq1FriUlh2iMscKMCqX0ERr98CdonNISYywpwyPE5k3WVT5LXfTNR1dltikzV9loXedj1obM1v1q0bR5NYTLQt26dIqOg62TP9vnBL0_PrxNn_PZ_Ollej_LHVG8yyWDIEMIGgrLvWRagytIQZwrheWqKEEHhgVRznkCBcFcMBBFSSUWjjtCJ-hqt7uO7WfvU2dWi-R8XdvGt30yIIWiSsp_gIwLwtQAXvwBl20fm-GEAc0oZUoMMUF8R7nYphR9MOu4WNn4ZQCbjX-z9W82Po3WZuvf8KF3uV-3ydk6RNu4RfotgyQSNP0Gh7uA4w</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1943348694</pqid></control><display><type>article</type><title>On the strength and character of alumino-humic flocs</title><source>EZB Electronic Journals Library</source><creator>BACHE, D. H ; RASOOL, E ; MOFFAT, D ; MCGILLIGAN, F. J</creator><contributor>Oedegaard, H</contributor><creatorcontrib>BACHE, D. H ; RASOOL, E ; MOFFAT, D ; MCGILLIGAN, F. J ; Oedegaard, H</creatorcontrib><description>The paper describes the size, density and strength of flocs gained from a humic acid suspension coagulated with aluminium sulphate over a range of dose and pH. Flocs were generated on a continuous flow basis in an oscillatory mixer. Particle size measurements were gained using CCTV and image analysis. From this, a maximum floc size (d95) was identified. A second series of experiments examined the floc sizes of the bulk precipitate alone under equivalent conditions. It was found that the overall floc sizes of the two suspensions were broadly similar, suggesting that the floc strength was dominated by a common bonding mechanism irrespective of the presence of the humic colloids. Some features of the size distribution in response to dose and pH were attributed to the influence of surface charge. Upper floc sizes were proportional to the Kolmogorov length (η) with d95/η ∼1. For typical levels of mixing, the floc strength was estimated to be on the order of 0.1 N m−2. By analysing the breakage kinetics in energy terms and relating the strength to the density of individual floc, a physically-based structural model was developed to explain the response of the floc size to the prevailing state of mixing.</description><identifier>ISSN: 0273-1223</identifier><identifier>ISBN: 0080436889</identifier><identifier>ISBN: 9780080436883</identifier><identifier>EISSN: 1996-9732</identifier><identifier>DOI: 10.1016/S0273-1223(99)00643-5</identifier><identifier>CODEN: WSTED4</identifier><language>eng</language><publisher>Oxford: Pergamon Press</publisher><subject>Aluminium ; Aluminum ; Aluminum sulfate ; Applied sciences ; Bonding strength ; Breakage ; Closed circuit television ; Colloids ; Continuous flow ; Drinking water and swimming-pool water. Desalination ; Exact sciences and technology ; Humic acids ; Image analysis ; Image processing ; Kinetics ; Particle size distribution ; pH effects ; Pollution ; Size distribution ; Strength ; Surface charge ; Water treatment and pollution</subject><ispartof>Water science and technology, 1999, Vol.40 (9), p.81-88</ispartof><rights>2000 INIST-CNRS</rights><rights>Copyright IWA Publishing Nov 1999</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c285t-741f7fff91ba5e74991cb2b2ccd6a58bd19f40628cce21b2056416bd3706c5c23</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>309,310,314,780,784,789,790,4024,4050,4051,23930,23931,25140,27923,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1172719$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><contributor>Oedegaard, H</contributor><creatorcontrib>BACHE, D. H</creatorcontrib><creatorcontrib>RASOOL, E</creatorcontrib><creatorcontrib>MOFFAT, D</creatorcontrib><creatorcontrib>MCGILLIGAN, F. J</creatorcontrib><title>On the strength and character of alumino-humic flocs</title><title>Water science and technology</title><description>The paper describes the size, density and strength of flocs gained from a humic acid suspension coagulated with aluminium sulphate over a range of dose and pH. Flocs were generated on a continuous flow basis in an oscillatory mixer. Particle size measurements were gained using CCTV and image analysis. From this, a maximum floc size (d95) was identified. A second series of experiments examined the floc sizes of the bulk precipitate alone under equivalent conditions. It was found that the overall floc sizes of the two suspensions were broadly similar, suggesting that the floc strength was dominated by a common bonding mechanism irrespective of the presence of the humic colloids. Some features of the size distribution in response to dose and pH were attributed to the influence of surface charge. Upper floc sizes were proportional to the Kolmogorov length (η) with d95/η ∼1. For typical levels of mixing, the floc strength was estimated to be on the order of 0.1 N m−2. By analysing the breakage kinetics in energy terms and relating the strength to the density of individual floc, a physically-based structural model was developed to explain the response of the floc size to the prevailing state of mixing.</description><subject>Aluminium</subject><subject>Aluminum</subject><subject>Aluminum sulfate</subject><subject>Applied sciences</subject><subject>Bonding strength</subject><subject>Breakage</subject><subject>Closed circuit television</subject><subject>Colloids</subject><subject>Continuous flow</subject><subject>Drinking water and swimming-pool water. Desalination</subject><subject>Exact sciences and technology</subject><subject>Humic acids</subject><subject>Image analysis</subject><subject>Image processing</subject><subject>Kinetics</subject><subject>Particle size distribution</subject><subject>pH effects</subject><subject>Pollution</subject><subject>Size distribution</subject><subject>Strength</subject><subject>Surface charge</subject><subject>Water treatment and pollution</subject><issn>0273-1223</issn><issn>1996-9732</issn><isbn>0080436889</isbn><isbn>9780080436883</isbn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqNkEtLxDAYRYMPcGb0JwgFRXRRzZd3ljL4goFZqOuQpomdodOOSbvw39t5oODK1d2ce-EehM4B3wIGcfeKiaQ5EEKvtb7BWDCa8wM0Aq1FriUlh2iMscKMCqX0ERr98CdonNISYywpwyPE5k3WVT5LXfTNR1dltikzV9loXedj1obM1v1q0bR5NYTLQt26dIqOg62TP9vnBL0_PrxNn_PZ_Ollej_LHVG8yyWDIEMIGgrLvWRagytIQZwrheWqKEEHhgVRznkCBcFcMBBFSSUWjjtCJ-hqt7uO7WfvU2dWi-R8XdvGt30yIIWiSsp_gIwLwtQAXvwBl20fm-GEAc0oZUoMMUF8R7nYphR9MOu4WNn4ZQCbjX-z9W82Po3WZuvf8KF3uV-3ydk6RNu4RfotgyQSNP0Gh7uA4w</recordid><startdate>1999</startdate><enddate>1999</enddate><creator>BACHE, D. H</creator><creator>RASOOL, E</creator><creator>MOFFAT, D</creator><creator>MCGILLIGAN, F. J</creator><general>Pergamon Press</general><general>IWA Publishing</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QH</scope><scope>7UA</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FE</scope><scope>8FG</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>H96</scope><scope>H97</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>L.G</scope><scope>L6V</scope><scope>M0S</scope><scope>M1P</scope><scope>M7S</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>7TV</scope></search><sort><creationdate>1999</creationdate><title>On the strength and character of alumino-humic flocs</title><author>BACHE, D. H ; RASOOL, E ; MOFFAT, D ; MCGILLIGAN, F. J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c285t-741f7fff91ba5e74991cb2b2ccd6a58bd19f40628cce21b2056416bd3706c5c23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Aluminium</topic><topic>Aluminum</topic><topic>Aluminum sulfate</topic><topic>Applied sciences</topic><topic>Bonding strength</topic><topic>Breakage</topic><topic>Closed circuit television</topic><topic>Colloids</topic><topic>Continuous flow</topic><topic>Drinking water and swimming-pool water. Desalination</topic><topic>Exact sciences and technology</topic><topic>Humic acids</topic><topic>Image analysis</topic><topic>Image processing</topic><topic>Kinetics</topic><topic>Particle size distribution</topic><topic>pH effects</topic><topic>Pollution</topic><topic>Size distribution</topic><topic>Strength</topic><topic>Surface charge</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>BACHE, D. H</creatorcontrib><creatorcontrib>RASOOL, E</creatorcontrib><creatorcontrib>MOFFAT, D</creatorcontrib><creatorcontrib>MCGILLIGAN, F. J</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Aqualine</collection><collection>Water Resources Abstracts</collection><collection>ProQuest - Health & Medical Complete保健、医学与药学数据库</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>PML(ProQuest Medical Library)</collection><collection>Engineering Database</collection><collection>Earth, Atmospheric & Aquatic Science 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>Engineering collection</collection><collection>Pollution Abstracts</collection><jtitle>Water science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>BACHE, D. H</au><au>RASOOL, E</au><au>MOFFAT, D</au><au>MCGILLIGAN, F. J</au><au>Oedegaard, H</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>On the strength and character of alumino-humic flocs</atitle><jtitle>Water science and technology</jtitle><date>1999</date><risdate>1999</risdate><volume>40</volume><issue>9</issue><spage>81</spage><epage>88</epage><pages>81-88</pages><issn>0273-1223</issn><eissn>1996-9732</eissn><isbn>0080436889</isbn><isbn>9780080436883</isbn><coden>WSTED4</coden><abstract>The paper describes the size, density and strength of flocs gained from a humic acid suspension coagulated with aluminium sulphate over a range of dose and pH. Flocs were generated on a continuous flow basis in an oscillatory mixer. Particle size measurements were gained using CCTV and image analysis. From this, a maximum floc size (d95) was identified. A second series of experiments examined the floc sizes of the bulk precipitate alone under equivalent conditions. It was found that the overall floc sizes of the two suspensions were broadly similar, suggesting that the floc strength was dominated by a common bonding mechanism irrespective of the presence of the humic colloids. Some features of the size distribution in response to dose and pH were attributed to the influence of surface charge. Upper floc sizes were proportional to the Kolmogorov length (η) with d95/η ∼1. For typical levels of mixing, the floc strength was estimated to be on the order of 0.1 N m−2. By analysing the breakage kinetics in energy terms and relating the strength to the density of individual floc, a physically-based structural model was developed to explain the response of the floc size to the prevailing state of mixing.</abstract><cop>Oxford</cop><pub>Pergamon Press</pub><doi>10.1016/S0273-1223(99)00643-5</doi><tpages>8</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0273-1223 |
| ispartof | Water science and technology, 1999, Vol.40 (9), p.81-88 |
| issn | 0273-1223 1996-9732 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_17683877 |
| source | EZB Electronic Journals Library |
| subjects | Aluminium Aluminum Aluminum sulfate Applied sciences Bonding strength Breakage Closed circuit television Colloids Continuous flow Drinking water and swimming-pool water. Desalination Exact sciences and technology Humic acids Image analysis Image processing Kinetics Particle size distribution pH effects Pollution Size distribution Strength Surface charge Water treatment and pollution |
| title | On the strength and character of alumino-humic flocs |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T09%3A01%3A25IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=On%20the%20strength%20and%20character%20of%20alumino-humic%20flocs&rft.jtitle=Water%20science%20and%20technology&rft.au=BACHE,%20D.%20H&rft.date=1999&rft.volume=40&rft.issue=9&rft.spage=81&rft.epage=88&rft.pages=81-88&rft.issn=0273-1223&rft.eissn=1996-9732&rft.isbn=0080436889&rft.isbn_list=9780080436883&rft.coden=WSTED4&rft_id=info:doi/10.1016/S0273-1223(99)00643-5&rft_dat=%3Cproquest_cross%3E17456248%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1943348694&rft_id=info:pmid/&rfr_iscdi=true |