The Impact of Zeta Potential on the Physical Properties of Ferric−NOM Flocs
The physical properties of natural organic matter (NOM) flocs, such as size, growth rate, and strength, were investigated using a laser diffraction particle sizing device. Conditions were set such that varying carbon coagulant ratio and zeta potential could both be investigated. Results demonstrated...
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| Veröffentlicht in: | Environmental science & technology 2006-06, Vol.40 (12), p.3934-3940 |
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| creator | Sharp, Emma L Jarvis, Peter Parsons, Simon A Jefferson, Bruce |
| description | The physical properties of natural organic matter (NOM) flocs, such as size, growth rate, and strength, were investigated using a laser diffraction particle sizing device. Conditions were set such that varying carbon coagulant ratio and zeta potential could both be investigated. Results demonstrated a link between zeta potential and coagulation and flocculation performance, with the production of strong flocs and low residual concentrations when the zeta potential was minimized. The overall strength of the connection points within the floc were determined by a combination of steric interactions, polymer bridging, van der Waals forces, and electrostatic forces. Hence, both dose ratio and zeta potential are important in understanding floc properties. Floc growth was dominated by dose ratio, whereas the response to elevated shear was strongly related to zeta potential. The steady-state floc size was a combination of both factors. This allowed the continued development of a qualitative model in order to engineer optimal floc properties when coagulating NOM. |
| doi_str_mv | 10.1021/es051919r |
| format | Article |
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Conditions were set such that varying carbon coagulant ratio and zeta potential could both be investigated. Results demonstrated a link between zeta potential and coagulation and flocculation performance, with the production of strong flocs and low residual concentrations when the zeta potential was minimized. The overall strength of the connection points within the floc were determined by a combination of steric interactions, polymer bridging, van der Waals forces, and electrostatic forces. Hence, both dose ratio and zeta potential are important in understanding floc properties. Floc growth was dominated by dose ratio, whereas the response to elevated shear was strongly related to zeta potential. The steady-state floc size was a combination of both factors. This allowed the continued development of a qualitative model in order to engineer optimal floc properties when coagulating NOM.</description><identifier>ISSN: 0013-936X</identifier><identifier>EISSN: 1520-5851</identifier><identifier>DOI: 10.1021/es051919r</identifier><identifier>PMID: 16830564</identifier><identifier>CODEN: ESTHAG</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Carbon ; Drinking water and swimming-pool water. 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Sci. Technol</addtitle><description>The physical properties of natural organic matter (NOM) flocs, such as size, growth rate, and strength, were investigated using a laser diffraction particle sizing device. Conditions were set such that varying carbon coagulant ratio and zeta potential could both be investigated. Results demonstrated a link between zeta potential and coagulation and flocculation performance, with the production of strong flocs and low residual concentrations when the zeta potential was minimized. The overall strength of the connection points within the floc were determined by a combination of steric interactions, polymer bridging, van der Waals forces, and electrostatic forces. Hence, both dose ratio and zeta potential are important in understanding floc properties. Floc growth was dominated by dose ratio, whereas the response to elevated shear was strongly related to zeta potential. The steady-state floc size was a combination of both factors. This allowed the continued development of a qualitative model in order to engineer optimal floc properties when coagulating NOM.</description><subject>Applied sciences</subject><subject>Carbon</subject><subject>Drinking water and swimming-pool water. Desalination</subject><subject>Exact sciences and technology</subject><subject>Ferric Compounds - chemistry</subject><subject>Flocculation</subject><subject>General purification processes</subject><subject>Organic Chemicals - chemistry</subject><subject>Particle Size</subject><subject>Physical properties</subject><subject>Pollution</subject><subject>Wastewaters</subject><subject>Water Pollutants, Chemical - chemistry</subject><subject>Water Purification - methods</subject><subject>Water treatment</subject><subject>Water treatment and pollution</subject><issn>0013-936X</issn><issn>1520-5851</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqF0VFrFDEQB_Agir1WH_wCsggW-rA6k2w22cdyerbQ2pOeUPoSstlZunVvcyZ7YL-Bz37EfpKm3NEDffApDPPjT2aGsTcIHxA4fqQIEiuswjM2Qckhl1riczYBQJFXorzaY_sx3gIAF6Bfsj0stQBZFhN2vrih7HS5sm7MfJtd02izuR9pGDvbZ37IxtSf39zFzqV6HvyKwthRfMQzCqFz97__fL04z2a9d_EVe9HaPtLr7XvAvs8-L6Yn-dnFl9Pp8VlupSjHvGiktoKTqutaCytdq9umcAUI6RqBteToJG-0qBuSlqoaBVCLgBVUVaNaccAON7mr4H-uKY5m2UVHfW8H8utoOAhdcc3_C7FQGrguE3z3F7z16zCkIUzaGXKluUzoaINc8DEGas0qdEsb7gyCebyEebpEsm-3get6Sc1OblefwPstsDHttg12cF3cOaWVUgjJ5RvXxZF-PfVt-GFKJZQ0i_ml-Xb1qbycimujd7nWxd0Q_37wAQzeqow</recordid><startdate>20060615</startdate><enddate>20060615</enddate><creator>Sharp, Emma L</creator><creator>Jarvis, Peter</creator><creator>Parsons, Simon A</creator><creator>Jefferson, Bruce</creator><general>American Chemical Society</general><scope>BSCLL</scope><scope>IQODW</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>7QO</scope><scope>7ST</scope><scope>7T7</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>SOI</scope><scope>7QH</scope><scope>7UA</scope></search><sort><creationdate>20060615</creationdate><title>The Impact of Zeta Potential on the Physical Properties of Ferric−NOM Flocs</title><author>Sharp, Emma L ; Jarvis, Peter ; Parsons, Simon A ; Jefferson, Bruce</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a536t-4d58a32e7bbb83a5cf8fd4c4035cd31b521c52d83bde5ae9b130ef1019099d7f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Applied sciences</topic><topic>Carbon</topic><topic>Drinking water and swimming-pool water. Desalination</topic><topic>Exact sciences and technology</topic><topic>Ferric Compounds - chemistry</topic><topic>Flocculation</topic><topic>General purification processes</topic><topic>Organic Chemicals - chemistry</topic><topic>Particle Size</topic><topic>Physical properties</topic><topic>Pollution</topic><topic>Wastewaters</topic><topic>Water Pollutants, Chemical - chemistry</topic><topic>Water Purification - methods</topic><topic>Water treatment</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sharp, Emma L</creatorcontrib><creatorcontrib>Jarvis, Peter</creatorcontrib><creatorcontrib>Parsons, Simon A</creatorcontrib><creatorcontrib>Jefferson, Bruce</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><collection>Aqualine</collection><collection>Water Resources Abstracts</collection><jtitle>Environmental science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sharp, Emma L</au><au>Jarvis, Peter</au><au>Parsons, Simon A</au><au>Jefferson, Bruce</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Impact of Zeta Potential on the Physical Properties of Ferric−NOM Flocs</atitle><jtitle>Environmental science & technology</jtitle><addtitle>Environ. Sci. Technol</addtitle><date>2006-06-15</date><risdate>2006</risdate><volume>40</volume><issue>12</issue><spage>3934</spage><epage>3940</epage><pages>3934-3940</pages><issn>0013-936X</issn><eissn>1520-5851</eissn><coden>ESTHAG</coden><abstract>The physical properties of natural organic matter (NOM) flocs, such as size, growth rate, and strength, were investigated using a laser diffraction particle sizing device. Conditions were set such that varying carbon coagulant ratio and zeta potential could both be investigated. Results demonstrated a link between zeta potential and coagulation and flocculation performance, with the production of strong flocs and low residual concentrations when the zeta potential was minimized. The overall strength of the connection points within the floc were determined by a combination of steric interactions, polymer bridging, van der Waals forces, and electrostatic forces. 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| subjects | Applied sciences Carbon Drinking water and swimming-pool water. Desalination Exact sciences and technology Ferric Compounds - chemistry Flocculation General purification processes Organic Chemicals - chemistry Particle Size Physical properties Pollution Wastewaters Water Pollutants, Chemical - chemistry Water Purification - methods Water treatment Water treatment and pollution |
| title | The Impact of Zeta Potential on the Physical Properties of Ferric−NOM Flocs |
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