Browsing College of Engineering and Informatics by Author "Healy, Mark G."
Now showing items 1-20 of 129
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Antimicrobial compounds (triclosan and triclocarban) in sewage sludges, and their presence in runoff following land application
Healy, Mark G.; Fenton, Owen; Cormican, Martin; Peyton, Dara P.; Ordsmith, N.; Kimber, K.; Morrison, Liam (Elsevier, 2017-04-28)The reuse of treated municipal sewage ( biosolids ) on land is an effective method to divert waste away from landfill and to use an alternative, low cost method of fertilisation. While legislation has mainly focused on the ... -
Appraisal and ranking of poly-aluminium chloride, ferric chloride and alum for the treatment of dairy soiled water
Mohamed, A.Y.A.; Siggins, Alma; Healy, Mark G.; Ó hUallacháin, Daire; Fenton, Owen; Tuohy, Patrick (Elsevier, 2020-04-29)Land spreading of dairy soiled water (DSW) may result in pollution of ground and surface waters. Treatment of DSW through sludge-supernatant separation using chemical coagulants is a potential option to reduce the negative ... -
Assessment of intermittently loaded woodchip and sand filters to treat dairy soiled water
Murnane, J. G.; Brennan, R. B.; Healy, Mark G. (IWA Publishing and Elsevier, 2016-07-31)Land application of dairy soiled water (DSW) is expensive relative to its nutrient replacement value. The use of aerobic filters is an effective alternative method of treatment and potentially allows the final effluent to ... -
An assessment of potential pesticide transmission, considering the combined impact of soil texture and pesticide properties: A meta-analysis
McGinley, John; Harmon O’Driscoll, Jenny; Healy, Mark G.; Ryan, Paraic C.; Mellander, Per Eric; Morrison, Liam; Callery, Oisin; Siggins, Alma (Wiley, 2022-02-22)Pesticides are widely employed as a cost-effective means of reducing the impacts of undesirable plants and animals. The aim of this paper is to develop a risk ranking of transmission of key pesticides through soil to ... -
Assessment of the hydraulic and filter performance of different drainage stone aggregates to elucidate an optimum size range for use in clay-textured soils
Byrne, Ian; Healy, Mark G.; Fenton, Owen; Tuohy, Patrick (Elsevier, 2023-01-18)On poorly drained grassland farms in Ireland, stone aggregates remain the only in-field drain envelope material used by contractors. A variety of aggregate sizes and lithologies are currently in use, but their performance ... -
Bioaccumulation of metals in ryegrass (Lolium perenne L.) following the application of lime stabilised, thermally dried and anaerobically digested sewage sludge.
Healy, Mark G.; Ryan, Paraic C.; Fenton, Owen; Peyton, Dara P.; Morrison, Liam (Elsevier ScienceDirect, 2016-05-09)The uptake and accumulation of metals in plants is a potential pathway for the transfer of environmental contaminants in the food chain, and poses potential health and environmental risks. In light of increased population ... -
Carbon and nitrogen dynamics and greenhouse gas emissions in constructed wetlands treating wastewaters: a review
Healy, Mark G. (2016-02-17)The removal efficiency of carbon (C) and nitrogen (N) in constructed wetlands (CWs) is very inconsistent and frequently does not reveal whether the removal processes are due to physical attenuation or whether the different ... -
Catalytic potential of selected metal ions for bioleaching, and potential techno-economic and environmental issues: a critical review
Pathak, Ashish; Morrison, Liam; Healy, Mark G. (Elsevier, 2017-01-06)Bioleaching is considered to be a low-cost, eco-friendly technique for leaching valuable metals from a variety of matrixes. However, the inherent slow dissolution kinetics and low metal leaching yields have restricted its ... -
Changes in the fractionation profile of Al, Ni and Mo during bioleaching of spent hydroprocessing catalysts with Acidithiobacillus ferrooxidans.
Pathak, Ashish; Healy, Mark G.; Morrison, Liam (Taylor & Francis, 2018-06-05)Spent hydroprocessing catalysts are known to contain a variety of potentially toxic metals and therefore studies on the bioavailability and mobility of these metals are critical for understanding the possible environmental ... -
Characterization of separated pig manure composted with a variety of bulking agents at low initial C/N ratios
Troy, Shane M.; Healy, Mark G.; Kwapinski, Witold (2011)The aim of this study was to investigate the composting of separated pig manure solids with or without a variety of bulking agents at a low initial C/N ratio (12.5-23.3). Compost stability was investigated using an oxygen ... -
Chemical amendment of pig slurry: control of runoff related risks due to episodic rainfall events up to 48 hours after application.
O'Flynn, C.J.; Healy, Mark G. (2013)Losses 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 ... -
Comparison of a stratified and a single-layer laboratory sand filter to treat dairy soiled water from a farm-scale woodchip filter
Ruane, Eimear; Healy, Mark G. (Springer, 2014-04)Washing-down parlours and standing areas, following milking on dairy farms, produces dairy soiled water (DSW) that contains variable concentrations of nutrients. Aerobic woodchip filters can remove organic matter, nutrients ... -
Consequences of varied soil hydraulic and meteorological complexity on unsaturated zone time lag estimates.
Vero, S.E.; Healy, Mark G. (Elsevier, 2014-10-13)The true efficacy of a programme of agricultural mitigation measures within a catchment to improve water quality can be determined only after a certain hydrologic time lag period (subsequent to implementation) has elapsed. ... -
Constructed wetlands for the treatment of highway runoff.
Keating, E.; Healy, Mark G.; Rodgers, Michael (Nova Publishers, 2008-06-01)Highway surface runoff contains pollutants such as total suspended solids (TSS), hydrocarbons, de-icing salts, and heavy metals. Treatment methods for highway runoff include storage/treatment facilities, such as constructed ... -
Contrasting yield responses to phosphorus applications on mineral and organic soils from extensively managed grasslands: Implications for P management in high ecological status catchments
González Jiménez, José L.; Healy, Mark G.; Roberts, William M.; Daly, Karen (Wiley, 2018-09-13)Phosphorus (P) loss from grassland production is one of the main causes affecting high status water bodies in Europe. Soils with a high content in organic matter (OM), even if extensively managed, are particularly vulnerable ... -
Cyclic loading tests on sandstone and limestone shale aggregates used in unbound forest roads
Rodgers, Michael; Hayes, G; Healy, Mark G. (Elsevier, 2009)This study examined the performance of two aggregates subjected to cyclic loading in a large-scale test rig. The two aggregates examined were: (i) a sandstone from Co. Cork, Ireland and (ii) a limestone shale from Co. ... -
Cyclic loading tests on sandstone and limestone shale aggregates used in unbound forest roads.
Rodgers, Michael; Hayes, Gregory; Healy, Mark G. (Construction and Building Materials, 2009-06-01)This study examined the performance of two aggregates subjected to cyclic loading in a large-scale test rig. The two aggregates examined were: (i) a sandstone from Co. Cork, Ireland and (ii) a limestone shale from Co. ... -
Dairy processing sludge and co-products: a review of present and future re-use pathways in agriculture
Shi, W.; Healy, Mark G.; Ashekuzzaman, S.M.; Daly, K.; Leahy, J.J.; Fenton, Owen (Elsevier, 2021-06-22)The dairy industry is one of the largest global producers of wastewater and generates huge volumes of dairy processing sludge (DPS). There are two main types of DPS, lime-treated dissolved air floatation sludge and ... -
Denitrification of a nitrate-rich wastewater using various wood-based media materials
Rodgers, Michael; Mulqueen, John; Healy, Mark G. (2006)This laboratory study examined the use of various wood materials as a carbon source in horizontal flow filters to denitrify nitrate-nitrogen (NO3-N) from a synthetic wastewater. The filter materials were: sawdust ( Pinus ... -
Developing and validating a decision support tool for media selection to mitigate drainage waters
Ezzati, Golnaz; Healy, Mark G.; Christianson, Laura E.; Feyereisen, Gary; Thornton, Steven; Daly, Karen; Fenton, Owen (Elsevier, 2019-07-26)The nitrate nitrogen (NO3-N) and ammonium (NH4-N) and/or dissolved reactive phosphorus (DRP) load in drainage water from farms can be managed by reactive or biological media filters. The nutrient content of the drainage ...