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dc.contributor.authorO'Flynn, Cornelius J.*
dc.contributor.authorHealy, Mark G.*
dc.contributor.authorWilson, Paul*
dc.contributor.authorHoekstra, Nyncke J.*
dc.contributor.authorTroy, Shane M.*
dc.contributor.authorFenton, Owen*
dc.date.accessioned2013-08-06T09:00:55Z
dc.date.available2013-08-06T09:00:55Z
dc.date.issued01/09/2013
dc.identifier.citationCornelius J. O’ Flynn, Mark G. Healy, Paul Wilson, Nyncke J. Hoekstra, Shane M. Troy, Owen Fenton. Chemical amendment of pig slurry: control of runoff related risks due to episodic rainfall events up to 48 h after application. Environmental Science and Pollution Research, 2013, 20(9), 6019-6027. DOI: 10.1007/s11356-013-1630-0en_GB
dc.identifier.issn0944-1344
dc.identifier.urihttp://hdl.handle.net/11019/410
dc.descriptionpeer-revieweden_GB
dc.description.abstractLosses of phosphorus (P) from soil and slurry during episodic rainfall events can contribute to eutrophication of surface water. However, chemical amendments have the potential to decrease P and suspended solids (SS) losses from land application of slurry. Current legislation attempts to avoid losses to a water body by prohibiting slurry spreading when heavy rainfall is forecast within 48 h. Therefore, in some climatic regions, slurry spreading opportunities may be limited. The current study examined the impact of three time intervals (TIs; 12, 24 and 48 h) between pig slurry application and simulated rainfall with an intensity of 11.0±0.59 mm h-1. Intact grassed soil samples, 1 m long, 0.225 m wide and 0.05 m deep, were placed in runoff boxes and pig slurry or amended pig slurry was applied to the soil surface. The amendments examined were: (1) commercial-grade liquid alum (8% Al2O3) applied at a rate of 0.88:1 [Al/total phosphorus (TP)] (2) commercial-grade liquid ferric chloride (38% FeCl3) applied at a rate of 0.89:1 [Fe/TP] and (3) commercial-grade liquid poly-aluminium chloride (10 % Al2O3) applied at a rate of 0.72:1 [Al/TP]. Results showed that an increased TI between slurry application and rainfall led to decreased P and SS losses in runoff, confirming that the prohibition of land-spreading slurry if heavy rain is forecast in the next 48 h is justified. Averaged over the three TIs, the addition of amendment reduced all types of P losses to concentrations significantly different (p<0.05) to those from unamended slurry, with no significant difference between treatments. Losses from amended slurry with a TI of 12 h were less than from unamended slurry with a TI of 48 h, indicating that chemical amendment of slurry may be more effective at ameliorating P loss in runoff than current TI-based legislation. Due to the high cost of amendments, their incorporation into existing management practices can only be justified on a targeted basis where inherent soil characteristics deem their usage suitable to receive amended slurry.en_GB
dc.description.sponsorshipIrish Research Council for Science, Engineering and Technology (IRCSET) - EMBARK Scholarshipen_GB
dc.language.isoenen_GB
dc.publisherSpringeren_GB
dc.relation.ispartofseriesEnvironmental Science and Pollution Research;vol. 20
dc.subjectPig slurryen_GB
dc.subjectRunoffen_GB
dc.subjectP sorbing amendmentsen_GB
dc.subjectNitrates Directiveen_GB
dc.subjectWater Framework Directiveen_GB
dc.subjectPhosphorusen_GB
dc.subjectSuspended solidsen_GB
dc.titleChemical amendment of pig slurry: control of runoff related risks due to episodic rainfall events up to 48 h after applicationen_GB
dc.typeArticleen_GB
dc.identifier.rmis6440
dc.identifier.doihttp://dx.doi.org/10.1007/s11356-013-1630-0
dc.contributor.sponsorIrish Research Council for Science, Engineering and Technology
refterms.dateFOA2018-01-12T07:23:41Z


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