Phosphorus Immobilization in Manure-impacted Soil with Aluminum-based Drinking Water Treatment Residual PDF Download
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Author: Michael Miyittah-Kporgbe
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Increased WTR rates can largely overcome soluble organics impacts and negate the need for massive soil horizon mixing. Al-WTR can be an effective soil amendment to reduce P loss from manure-impacted soil when the WTR is made to contact soluble P in the soil profile. Soluble P not in direct contact with the WTR is unaffected by WTR and is subject to leaching loss.
Author: Michael Miyittah-Kporgbe
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Increased WTR rates can largely overcome soluble organics impacts and negate the need for massive soil horizon mixing. Al-WTR can be an effective soil amendment to reduce P loss from manure-impacted soil when the WTR is made to contact soluble P in the soil profile. Soluble P not in direct contact with the WTR is unaffected by WTR and is subject to leaching loss.
Author: Thomas J. Rew
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Incorporation of Al-WTR to a depth of 10 cm decreased SP concentrations in subsurface flow and leachate by 37 and 11%, respectively. However, with incorporation of Al-WTR to a depth of 20 cm, both subsurface flow and leachate SP concentrations were reduced by approximately 90%. The incorporated Al-WTR reduced soil water-extractable P (WEP) by approximately 70%. However, Mehlich-1 P concentrations were not affected by the incorporation of Al-WTR in the soil. Care must be taken to ensure complete incorporation of Al-WTR throughout the P-impacted layer, as Al-WTR is only effective in reducing SP concentrations when it is in contact with the impacted soil. Shoot and root growth of stargrass were not adversely affected by the Al-WTR applied at a rate of 2.5% of soil weight.
Author: Collin Thomas Lane
Publisher:
ISBN:
Category : Cattle
Languages : en
Pages : 142
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Author: Julie Lauter Driscoll
Publisher:
ISBN:
Category :
Languages : en
Pages :
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The SPSC values increased on plots with WTR even after heavy loads of P were applied and some remained high enough that additional P should be retained. Potential nitrification rates increased with higher WTR application rates, indicating no adverse effects occurred on soil microbial populations because of WTR application. Groundwater SRP concentrations decreased with the addition of WTR by 78% in the surface applied treatments. There were no differences in SRP concentrations among the incorporated treatments which was likely a temporary result of the tilling process. Forage yield, crude protein and neutral detergent fiber were not affected by WTR application. Tissue Al did not increase and tissue calcium and magnesium uptake was not restricted. Tissue P decreased as WTR application rate increased. Tissue P levels were higher in the incorporated treatments than the surface applied treatments. However, tissue levels did not fall below the bahiagrass limiting value (0.15%). Based on this study, the use of WTRs is recommended as an amendment to soils with low P retention capacities that have been heavily impacted with P or will receive high amounts of P e.g., a dairy sprayfield.
Author: Xinde Cao
Publisher:
ISBN:
Category : Lead
Languages : en
Pages : 112
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Book Description
Lab tests and a field demonstration were conducted to evaluate the feasibility and effectiveness of immobilizing metals in contaminated soils using phosphate. Phosphate was more effective for Pb immobilization than for Zn, Cu, and Cd. The formation of insoluble pyromorphite-like minerals was responsible for Pb immobilization, whereas Zn, Cu, and Cd immobilization may be attributed to the coprecipitation and surface complexation mechanisms. The most efficient formation of pyromorphite-like minerals was found at pH 3 and at an application rate of 4 P/Pb. Soil acidification was necessary to dissolve soil Pb carbonates and to make them readily available for the formation of pyromorphite-like minerals. Therefore, a two-step phosphate amendment was applied at a contaminated site in which the soil was first acidified with H3PO4, and Ca(H2PO4)2 or phosphate rock was then added. Phosphate effectively induced transformation of soil Pb from the non-residual to the residual fraction, with residual Pb increase by up to 55%. Modeling indicated that lead phosphate minerals controlled Pb2+ activities in the P-treated soils. Phosphate treatments significantly reduced Pb uptake by Stenotaphrum secundatum. A mixture of H3PO4 and phosphate rock yielded the best overall results for in situ Pb immobilization, with less soil pH change and less phosphorus leaching.
Author: Konstantinos Christos Makris
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
ABSTRACT: Drinking-water treatment residuals (WTRs) are amorphous metal hydroxides with significant phosphorus (P) retention capacities, and offer significant potential to cost-effectively control soluble P losses in P-impacted sandy soils. The long-term stability of WTR-immobilized P, however, is unknown and is of major concern to regulatory agencies. We studied the sorption/desorption capacities, kinetics, and mechanisms involved in the reaction of P with three Fe-based and four Al-based WTRs.
Author: James Earl Hyde
Publisher:
ISBN:
Category :
Languages : en
Pages : 114
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Book Description
Author: Jaime Mejias-Bassaletti
Publisher:
ISBN:
Category : Phosphorus in agriculture
Languages : en
Pages :
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Book Description
Author: Christian Schaum
Publisher: IWA Publishing
ISBN: 1780408358
Category : Science
Languages : en
Pages : 592
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Book Description
This comprehensive book provides an up-to-date and international approach that addresses the Motivations, Technologies and Assessment of the Elimination and Recovery of Phosphorus from Wastewater. This book is part of the Integrated Environmental Technology Series.
Author: Pedro A. Sanchez
Publisher: Cambridge University Press
ISBN: 1107176050
Category : Business & Economics
Languages : en
Pages : 685
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Book Description
Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
