Browsing Civil Engineering (Scholarly Articles) by Author "Healy, Mark G."
Now showing items 61-80 of 122
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Impacts of zeolite, alum and polyaluminium chloride amendments mixed with agricultural wastes on soil column leachate, and CO2 and CH4 emissions.
Murnane, John G.; Fenton, Owen; Healy, Mark G. (Elsevier, 2017-11-02)This study aimed to quantify leaching losses of nitrogen (N), phosphorus (P) and carbon (C), as well as carbon dioxide (CO2) and methane (CH4) emissions from stored slurry and from packed soil columns surface applied with ... -
Implications of applied best management practice for peatland forest harvesting
Finnegan, Joanne; Regan, John T.; Healy, Mark G. (Elsevier (ScienceDirect), 2013-12-20)Elevated levels of nutrients and suspended sediment (SS), and changes to other environmental parameters, are frequently associated with forestry harvesting (clearfelling) operations, and are indicative of the potentially ... -
Incidental phosphorus and nitrogen loss from grassland plots receiving chemically amended dairy cattle slurry.
Brennan, Raymond B.; Healy, Mark G. (Elsevier, 2012-09)Chemical amendment of dairy cattle slurry has been shown to effectively reduce incidental phosphorus (P) losses in runoff; however, the effects of amendments on incidental nitrogen (N) losses are not as well documented. ... -
Influence of soil phosphorus status, texture, pH and metal content on the efficacy of amendments to pig slurry in reducing phosphorus losses
O’ Flynn, Cornelius J.; Fenton, Owen; Wall, David; Brennan, Raymond B.; McLaughlin, Mike J.; Healy, Mark G. (Wiley, 2017-12-13)Cost effective strategies for using chemically amended organic fertilizers need to be developed to minimize nutrient losses in surface and groundwater. Coupling specific soil physical and chemical characteristics with ... -
An integrated assessment of nitrogen source, transformation and fate within an intensive dairy system to inform management change.
Clagnan, Elisa; Thornton, Steven F.; Rolfe, Stephen A.; Wells, Naomi S.; Knoeller, Kay; Murphy, John; Tuohy, Patrick; Daly, Karen; Healy, Mark G.; Ezzati, Golnaz; von Chamier, Julia; Fenton, Owen (Public Library of Science, 2019-07-23)From an environmental perspective optimised dairy systems, which follow current regulations, still have low nitrogen (N) use efficiency, high N surplus (kg N ha-1) and enable ad-hoc delivery of direct and indirect reactive ... -
An integrated connectivity risk ranking for phosphorus and nitrogen along agricultural open ditches to inform targeted and specific mitigation management
Opoku, D. G.; Healy, Mark G.; Fenton, Owen; Daly, K.; Condon, T.; Tuohy, Patrick (Frontiers Media, 2024-02-19)On dairy farms with poorly drained soils and high rainfall, open ditches receive nutrients from different sources along different pathways which are delivered to surface water. Recently, open ditches were ranked in terms ... -
Investigating the suitability of synthetic envelopes as an alternative or complement to stone aggregate in clay-textured soils in Ireland
Byrne, Ian; Healy, Mark G.; Fenton, Owen; Tuohy, Patrick (Elsevier, 2022-12-21)In Ireland, agricultural landscapes dominated by high rainfall and poorly drained soils have high densities of in-field pipe drains surrounded by stone aggregate envelopes. Unlike other countries, there is limited availability ... -
An investigation into the growth of lolium perenne L. and soil properties following soil amendment with phosphorus-saturated bauxite residue
Cusack, Patricia B.; Healy, Mark G.; Callery, Oisín; Di Carlo, Elisa; Ujaczki, Éva; Courtney, Ronan (Springer, 2022-04-07)Industrial by-products, such as bauxite residue, may be used to treat phosphorus (P)-enriched water and wastewater. Once fully saturated, they may be reused as P fertilisers. This study aimed to investigate the effectiveness ... -
Management and rehabilitation of peatlands: the roles of water chemistry, hydrology, policy, and emerging monitoring methods to ensure informed decision making
Monteverde, S.; Healy, Mark G.; O'Leary, D.; Daly, E.; Callery, O. (Elsevier, 2022-04-03)As the world's most abundant source of terrestrial carbon, peatlands provide numerous ecosystem services, including habitat biodiversity and freshwater quality. Land and water management practices in relation to peatlands, ... -
Metal concentrations in lime stabilised, thermally dried and anaerobically digested sewage sludges.
Healy, Mark G.; Brennan, Raymond B.; Morrison, Liam (Elsevier ScienceDirect, 2015-11-25)Cognisant of the negative debate and public sentiment about the land application of treated sewage sludges ( biosolids ), it is important to characterise such wastes beyond current regulated parameters. Concerns may be ... -
A methodological framework to determine optimum durations for the construction of soil water characteristic curves using centrifugation
Vero, Sara E.; Healy, Mark G.; Henry, Tiernan; Creamer, Rachel E.; Ibrahim, Tristan G.; Forrestal, Patrick J.; Richards, Karl G.; Fenton, Owen (De Gruyter Open, 2016-12-30)During laboratory assessment of the soil water characteristic curve (SWCC), determining equilibrium at various pressures, is challenging. This study establishes a methodological framework to identify appropriate experimental ... -
Methodology for the location of a subsurface permeable reactive barrier for the remediation of point source pollution on an Irish farm
Healy, Mark G. (Teagasc, 2008-09)Nutrient loss from agricultural sources to water continues to be a national challenge. Diffuse pollution from agricultural sources is considered to be the primary cause of slight-to-moderate water pollution in Ireland, but ... -
Microplastics in sewage sludge: effects of treatment
Mahon, A.M.; O'Connell, B.; Healy, Mark G.; O’Connor, I.; Officer, R.; Nash, R.; Morrison, Liam (American Chemical Society, 2016-12-12)Waste Water Treatment Plants (WWTPs) are receptors for the cumulative loading of microplastics (MPs) derived from industry, landfill, domestic waste water and storm water. The partitioning of MPs through the settlement ... -
Mineral fertiliser equivalent value of dairy processing sludge and derived biochar using ryegrass (Lolium perenne L.) and spring wheat (Triticum aestivum)
Shi, W.; Healy, Mark G.; Ashekuzzaman, S. M.; Daly, K.; Fenton, Owen (Elsevier, 2022-08-20)As supply chains of chemical fertilisers become more precarious, raw or derived bio-based fertilisers (herein referred to as bio-fertilisers) from the dairy processing industry could be good alternatives. However, their ... -
Mitigating ammonia and greenhouse gas emissions from stored cattle slurry using agricultural waste, commercially available products and a chemical acidifier.
Kavanagh, Ian; Fenton, Owen; Healy, Mark G.; Burchill, William; Lanigan, Gary J.; Krol, Dominika J. (Elsevier, 2021-02-05)Bovine slurry and its subsequent storage are significant sources of ammonia (NH3) and greenhouse gases (GHGs). Chemical acidification of manures has been shown to significantly reduce these emissions. Waste products, derived ... -
Mitigation of ammonia and greenhouse gas emissions from stored cattle slurry using acidifiers and chemical amendments
Kavanagh, I.; Burchill, W.; Healy, Mark G.; Fenton, O.; Krol, D. J.; Lanigan, G. J. (Elsevier, 2019-07-28)Cattle and cow slurry storage is a significant source of agricultural greenhouse gas (GHG) and ammonia (NH3) emissions. While acidification has been demonstrated to significantly reduce these emissions, a knowledge gap ... -
Nitrate removal rate, efficiency and pollution swapping potential of different organic carbon media in laboratory denitrification bioreactors.
Healy, Mark G.; Ibrahim, Tristan; Lanigan, Gary; Serrenho, Ana; Fenton, Owen (Ecological Engineering, 2012-01-01)Laboratory denitrifying bioreactors, which use an organic carbon (C) rich media to enhance microbial reduction of nitrate (NO3-) to nitrogen (N) gases, are used worldwide to protect surface and groundwater. To highlight ... -
Nitrification in a vertically moving biofilm system
Rodgers, Michael; Healy, Mark G.; Prendergast, John (Elsevier, 2006-03)A laboratory continuous feed biofilm reactor, comprising a bulk fluid reactor, a biofilm plastic module, a feed tank, and pneumatic devices and controls, was operated for a total period of 257 days, including seeding time, ... -
Nitrification in a vertically moving biofilm system.
Rodgers, Michael; Healy, Mark G.; Prendergast, John (Journal of Environmental Management, 2006-06-01)A laboratory continuous feed biofilm reactor, comprising a bulk fluid reactor, a biofilm plastic module, a feed tank, pneumatic devices and controls, was operated for a total period of 257 days, including seeding time, to ... -
A novel hybrid coagulation-constructed wetland system for the treatment of dairy wastewater
Mohamed, A.Y.A.; Siggins, A.; Healy, Mark G.; Ó hUallacháin, D.; Fenton, O.; Tuohy, P. (Elsevier, 2022-07-29)Constructed wetlands (CWs) are a cost-effective and sustainable treatment technology that may be used on farms to treat dairy wastewater (DWW). However, CWs require a large area for optimal treatment and have poor long-term ...