File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1061/(ASCE)0733-9372(2008)134:5(369)
- Scopus: eid_2-s2.0-42549172325
- WOS: WOS:000255418000006
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Characterization of the flocculation process from the evolution of particle size distributions
Title | Characterization of the flocculation process from the evolution of particle size distributions |
---|---|
Authors | |
Keywords | Coagulation Flocculation Imaging Techniques Particle Size Distribution Particles Water Treatment |
Issue Date | 2008 |
Publisher | American Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.html |
Citation | Journal of Environmental Engineering, 2008, v. 134 n. 5, p. 369-375 How to Cite? |
Abstract | A flocculator-imaging system was developed to characterize the dynamics of particle size distribution (PSD) during flocculation. The system consisted of a flocculator coupled with an external flow-through cell for observation and photography, a microscopic charge-coupled device video recorder with backlighting, and an image analyzer. This nonintrusive side-stream setup was used to record the evolution of the PSD to determine the flocculation dynamics of three types of particle systems: Clean kaolin, kaolin coated with natural organic matter (NOM), and the kaolin/NOM system after ozonation. In addition to the PSD measurement, the potential, NOM reduction, and turbidity removal after the jar test of flocculation and sedimentation were determined for the particle systems at various alum dosages. The results of the -potential analysis and the PSD measurement indicated that flocculation takes place rapidly to form highly porous aggregates when the particle surface charge is fully neutralized. The adsorption of NOM on the particle surface stabilized the particles considerably, and thus hindered the flocculation process. Sweep flocculation using a much higher alum dosage was an effective means of process enhancement for the removal of particulates and associated organic matter. Ozonation of the kaolin/NOM solution, however, did not appear to have any positive effect on particle destabilization and flocculation. It is argued that ozonation produced more acidic functional groups in the NOM on kaolin, which increased the surface charge density and hence the stability of the particles in softer water. © 2008 ASCE. |
Persistent Identifier | http://hdl.handle.net/10722/150451 |
ISSN | 2023 Impact Factor: 1.6 2023 SCImago Journal Rankings: 0.475 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Li, XY | en_US |
dc.contributor.author | Zhai, X | en_US |
dc.contributor.author | Chu, HP | en_US |
dc.contributor.author | Zhang, J | en_US |
dc.date.accessioned | 2012-06-26T06:04:52Z | - |
dc.date.available | 2012-06-26T06:04:52Z | - |
dc.date.issued | 2008 | en_US |
dc.identifier.citation | Journal of Environmental Engineering, 2008, v. 134 n. 5, p. 369-375 | en_US |
dc.identifier.issn | 0733-9372 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/150451 | - |
dc.description.abstract | A flocculator-imaging system was developed to characterize the dynamics of particle size distribution (PSD) during flocculation. The system consisted of a flocculator coupled with an external flow-through cell for observation and photography, a microscopic charge-coupled device video recorder with backlighting, and an image analyzer. This nonintrusive side-stream setup was used to record the evolution of the PSD to determine the flocculation dynamics of three types of particle systems: Clean kaolin, kaolin coated with natural organic matter (NOM), and the kaolin/NOM system after ozonation. In addition to the PSD measurement, the potential, NOM reduction, and turbidity removal after the jar test of flocculation and sedimentation were determined for the particle systems at various alum dosages. The results of the -potential analysis and the PSD measurement indicated that flocculation takes place rapidly to form highly porous aggregates when the particle surface charge is fully neutralized. The adsorption of NOM on the particle surface stabilized the particles considerably, and thus hindered the flocculation process. Sweep flocculation using a much higher alum dosage was an effective means of process enhancement for the removal of particulates and associated organic matter. Ozonation of the kaolin/NOM solution, however, did not appear to have any positive effect on particle destabilization and flocculation. It is argued that ozonation produced more acidic functional groups in the NOM on kaolin, which increased the surface charge density and hence the stability of the particles in softer water. © 2008 ASCE. | en_US |
dc.language | eng | en_US |
dc.publisher | American Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.html | en_US |
dc.relation.ispartof | Journal of Environmental Engineering | en_US |
dc.rights | Journal of Environmental Engineering. Copyright © American Society of Civil Engineers. | - |
dc.subject | Coagulation | en_US |
dc.subject | Flocculation | en_US |
dc.subject | Imaging Techniques | en_US |
dc.subject | Particle Size Distribution | en_US |
dc.subject | Particles | en_US |
dc.subject | Water Treatment | en_US |
dc.title | Characterization of the flocculation process from the evolution of particle size distributions | en_US |
dc.type | Article | en_US |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-9372&volume=134&spage=369&epage=375&date=2008&atitle=Characterization+of+flocculation+dynamics+from+the+evolution+of+particle+size+distributions | - |
dc.identifier.email | Li, XY: xlia@hkucc.hku.hk | en_US |
dc.identifier.email | Chu, HP: hiupingchu@yahoo.com | - |
dc.identifier.authority | Li, XY=rp00222 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1061/(ASCE)0733-9372(2008)134:5(369) | en_US |
dc.identifier.scopus | eid_2-s2.0-42549172325 | en_US |
dc.identifier.hkuros | 149605 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-42549172325&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 134 | en_US |
dc.identifier.issue | 5 | en_US |
dc.identifier.spage | 369 | en_US |
dc.identifier.epage | 375 | en_US |
dc.identifier.isi | WOS:000255418000006 | - |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Li, XY=26642887900 | en_US |
dc.identifier.scopusauthorid | Zhai, XD=11640497900 | en_US |
dc.identifier.scopusauthorid | Chu, HP=36870373000 | en_US |
dc.identifier.scopusauthorid | Zhang, JJ=24081952200 | en_US |
dc.identifier.issnl | 0733-9372 | - |