Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/1200
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Harris, Willie G. | - |
dc.contributor.author | O'Connor, George A. | - |
dc.contributor.author | Obreza, Thomas A. | - |
dc.contributor.author | Elliott, Herschel A. | - |
dc.contributor.author | Makris, Konstantinos C. | - |
dc.date.accessioned | 2015-03-19T09:24:19Z | - |
dc.date.accessioned | 2015-12-02T09:03:06Z | - |
dc.date.available | 2015-03-19T09:24:19Z | - |
dc.date.available | 2015-12-02T09:03:06Z | - |
dc.date.issued | 2005-06-01 | - |
dc.identifier.citation | Environmental Science & Technology, 2005, Volume 39, Issue 11, Pages 4280-4289 | en_US |
dc.identifier.issn | 15205851 | - |
dc.identifier.uri | https://hdl.handle.net/20.500.14279/1200 | - |
dc.description.abstract | Drinking-water treatment residuals (WTRs) are nonhazardous materials that can be obtained free-of-charge from drinking-water treatment plants to reduce soluble phosphorus (P) concentrations in poorly P sorbing soils. Phosphorus sorption capacities of WTRs can vary 1-2 orders of magnitude, on the basis of short-term equilibration times (up to 7 d), but studies dealing with long-term (weeks to months) P retention by WTRs are lacking. Properties that most affect long-term P sorption capacities are pertinent to the efficacy of WTRs as amendments to stabilize P in soils. This research addressed the long-term (up to 80 d) P sorption/desorption characteristics and kinetics for seven WTRs, including the influence of specific surface area (SSA), porosity, and total C content on the overall magnitude of P sorption by seven WTRs. The data confirm a strong but variable affinity for P by WTRs. Aluminum-based WTRs tended to have higher P sorption capacity than Fe-based WTRs. Phosphorus sorption with time was biphasic in nature for most samples and best fit to a second-order rate model. The P sorption rate dependency was strongly correlated with a hysteretic P desorption, consistent with kinetic limitations on P desorption from micropores. Oxalate-extractable Al + Fe concentrations of the WTRs did not effectively explain long-term (80 d) P sorption capacities of the WTRs. Micropore (CO 2-based) SSAs were greater than BET-N2 SSAs for most WTRs, except those with the lowest (<80 g kg-1) total C content. There was a significant negative linear correlation between the total C content and the CO2/N2 SSA ratio. The data suggest that C in WTRs increases microporosity, but reduces P sorption per unit pore volume or surface area. Hence, variability in C content confounds direct relations among SSA, porosity, and P sorption. Total C, N2-based SSA, and CO 2-based SSAs explained 82% of the variability in the long-term P sorption capacities of the WTRs. Prediction of long-term P sorption capacities for different WTRs may be achieved by taking into account the three proposed variables. | en_US |
dc.format | en_US | |
dc.language.iso | en | en_US |
dc.relation.ispartof | Environmental Science & Technology | en_US |
dc.rights | © American Chemical Society | en_US |
dc.subject | Drinking-water treatment residuals (WTR) | en_US |
dc.subject | Nonhazardous materials | en_US |
dc.subject | Phosphorus sorption | en_US |
dc.subject | Specific surface area (SSA) | en_US |
dc.title | Physicochemical properties related to long-term phosphorus retention by drinking-water treatment residuals | en_US |
dc.type | Article | en_US |
dc.collaboration | University of Texas | en_US |
dc.collaboration | University of Florida | en_US |
dc.collaboration | Pennsylvania State University | en_US |
dc.subject.category | Earth and Related Environmental Sciences | en_US |
dc.journals | Subscription | en_US |
dc.review | Peer Reviewed | en |
dc.country | United States | en_US |
dc.subject.field | Natural Sciences | en_US |
dc.publication | Peer Reviewed | en_US |
dc.identifier.doi | 10.1021/es0480769 | en_US |
dc.dept.handle | 123456789/54 | en |
dc.relation.issue | 11 | en_US |
dc.relation.volume | 39 | en_US |
cut.common.academicyear | 2005-2006 | en_US |
dc.identifier.spage | 4280 | en_US |
dc.identifier.epage | 4289 | en_US |
item.fulltext | No Fulltext | - |
item.languageiso639-1 | en | - |
item.grantfulltext | none | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
crisitem.journal.journalissn | 1520-5851 | - |
crisitem.journal.publisher | American Chemical Society | - |
crisitem.author.dept | Department of Rehabilitation Sciences | - |
crisitem.author.faculty | Faculty of Health Sciences | - |
crisitem.author.orcid | 0000-0001-5251-8619 | - |
crisitem.author.parentorg | Faculty of Health Sciences | - |
Appears in Collections: | Άρθρα/Articles |
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