Fiona Regan

Fiona Regan
Dublin City University | DCU · School of Chemical Sciences

PhD

About

163
Publications
38,192
Reads
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3,173
Citations
Additional affiliations
January 2007 - present
January 2006 - present
January 2003 - December 2012
Dublin City University

Publications

Publications (163)
Article
[Please note that the article can be freely downloaded from https://authors.elsevier.com/c/1fW0wB8ccuoOJ before September 20, 2022 ] In order to move forward in the acceptance of a novel contaminant monitoring technique (Diffusive Gradients in Thin-films: DGT) for assessment of marine water bodies, sensu the WFD, an Inter-Laboratories Comparison (I...
Article
Please note that the article and supplementary material can be freely downloaded from : https://doi.org/10.1016/j.marpolbul.2022.113715 This study investigates the relationships among Ni, Cd and Pb's different chemical forms determined by different methodologies in coastal and transitional waters across a broad geographical scale. Concentrations w...
Article
Poly- and perfluoroalkyl substances (PFASs) are a group of synthetic organic surfactants that have become a global concern because of their toxicity and widespread presence in the aquatic environment and organisms globally. In this study, a new analytical method has been developed and validated for the analysis of 15 perfluorinated compounds in dif...
Article
This study aims at improving the knowledge on the effects of gas injection, bubbles sizes and contaminants on oxygen transfer in microbubble clouds. First the effects of gas injection on oxygen transfer are studied and linked to several parameters that change together with changes in flow rate, namely bubble sizes and rise velocities. Oxygen transf...
Article
Full-text available
Soil moisture is a key parameter of the climate system as it relates to plant transpiration and photosynthesis and impacts land–atmosphere interactions. Recent developments have seen an increasing number of electromagnetic sensors available commercially (EM) for soil volumetric water content (θ). Their use is constantly expanding, and they are beco...
Article
Full-text available
Water scarcity is increasingly a global cause of concern mainly due to widespread changes in climate conditions and increased consumptive water use driven by the exponential increase in population growth. In addition, increased pollution of fresh water sources due to rising production and consumption of pharmaceuticals and organic chemicals will fu...
Article
A fully integrated lab-on-a-disc sensor for multi-sample phosphate detection based on the molybdenum blue method for the determination of soluble reactive phosphorus in surface waters is demonstrated. An adapted and simplified molybdenum blue method which eliminates a number of steps previously associated with the detection of phosphate in environm...
Article
Full-text available
This paper evaluates for the first time the spatial distribution of a wide group of organic (phthalates, nitro, aliphatic, halogen, aromatic, phenol and amino compounds) and inorganic pollutants along the Liffey river in Dublin city. The work takes into account the effect of short-term weather conditions on the occurrence of these contaminants. The...
Article
Full-text available
This protocol was developed based on the knowledge acquired in the framework of the Interreg MONITOOL project (EAPA_565/2016) where extensive sampling campaigns were performed in transitional and coastal waters covering eight European countries. It provides detailed procedures and guidelines for the sampling of these waterbodies by concurrent colle...
Preprint
This good practice guide is focused on the DGT devices, which are the most widely used passive sampler for metals, covering the following aspects: ■ Principle ■ Handling passive sampling devices for metals ■ Estimation of appropriate field deployment time ■ A Good Practice Guide for the Use of DGTs ■ Passive sampling device preparation and assembly...
Poster
Full-text available
Materials immersed in water undergo a series of biological and chemical processes, resulting in the formation of complex layers with attached organism, known as biofouling. Biofouling In the aquatic environment shortens the life-time of immersed structures affecting the functioning and data quality of water Instrumentation. For a large percentage o...
Book
Full-text available
This document provides guidance on best practice for the use of Diffusive Gradient in Thin films (DGT) passive samplers devices in sampling of transitional and coastal waters for water quality monitoring. The methodology to be addressed in this guide was developed by the consortium of the European Union's Interreg MONITOOL Project in order to ensur...
Article
Full-text available
This study investigates water quality along the river Liffey in Dublin city with the help of citizen scientists, including the community of river users such as paddle boarders and those accessing the river from the bank. The primary objective was to evaluate water quality near sources of pollution observed by citizens, while filling data gaps for t...
Article
The current study evaluates the effect of seawater physico-chemical characteristics on the relationship between the concentration of metals measured by Diffusive Gradients in Thin films (DGT) passive samplers (i.e., DGT-labile concentration) and the concentrations measured in discrete water samples. Accordingly, Inductively Coupled Plasma Mass Spec...
Article
Full-text available
The composition of challenging matrices must be fully understood in order to determine the impact of the matrix and to establish suitable treatment methods. Rendering condensate wastewater is a complex matrix which is understudied. It is produced when the vapour from rendering facilities (heat processing of slaughterhouse waste material) is cooled...
Article
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Active pharmaceutical ingredients (APIs) are increasingly being identified as contaminants of emerging concern (CECs). They have potentially detrimental ecological human health impacts but are not currently subject to environmental regulation....
Article
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Water monitoring sensors in industrial, municipal and environmental monitoring are advancing our understanding of science, aid developments in process automatization and control and support real-time decisions in emergency situations. Sensors are becoming smaller, smarter, increasingly specialized and diversified and cheaper. Advanced deployment pl...
Article
Full-text available
Efficient removal of nitrogen from wastewater is vital to ensure the safe keeping of waterways and their biota. Increased demand for meat supplies worldwide has led to increased wastewater production consisting of higher nitrogen levels. In order to reduce nitrogen treatment costs using biological denitrification, slaughterhouses need to start look...
Article
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Nannochloropsis sp. has received increased attention by researchers in recent years due to its complexity and abundance of lipid structures. The lipids of this microalgae species have been identified to contain large quantities of neutral lipids which are capable of producing raw materials for nutraceuticals, food additives and biofuels. The produc...
Article
Full-text available
Due to the growing threat of climate change, new advances in water quality monitoring strategies are needed now more than ever. Reliable and robust monitoring practices can be used to improve and better understand catchment processes affecting the water quality. In recent years the deployment of long term in-situ sensors has increased the temporal...
Article
Microcystins (MCs) are a group of highly potent cyanotoxins that are becoming more widely distributed due to increased global temperatures and climate change. Microcystin-leucine-arginine (MC-LR) is the most potent and most common variant, with a guideline limit of 1 μg/l in drinking water. We previously developed a novel avian single-chain fragmen...
Article
Full-text available
The imitation of natural systems to produce effective antifouling materials is often referred to as “biomimetics”. The world of biomimetics is a multidisciplinary one, needing careful understanding of “biological structures”, processes and principles of various organisms found in nature and based on this, designing nanodevices and nanomaterials tha...
Article
Full-text available
Hydrophobic membrane contactors represent a promising solution to the problem of recycling ammoniacal nitrogen (N-NH4) molecules from waste, water or wastewater resources. The process has been shown to work best with wastewater streams that present high N-NH4 concentrations, low buffering capacities and low total suspended solids. The removal of N-...
Article
Full-text available
A rapid quantitative method for 135 contaminants of emerging concern (CECs) in untreated wastewater enabled with direct injection liquid chromatography-tandem mass spectrometry is presented. All compounds were analysed within 5 min on a short biphenyl cartridge using only 10 µL of filtered sample per injection. Up to 76 compounds were monitored sim...
Article
Full-text available
Biological fouling, also called biofouling, is the undesirable formation of organisms on a surface immersed in water. When the exterior surface of an object such as a vessel is submerged in seawater for a prolonged period, micro and macro organisms usually accumulate on the surface. Biofilms are a set of microorganisms attached to a surface through...
Article
ColiSense, an early warning system developed for Escherichia coli detection, is assessed using environmental samples. The system relies on the detection of β-glucuronidase (GUS), a biomarker enzyme for E. coli. In contrast with other rapid GUS-based methods, ColiSense is the only method that uses 6-chloro-4-methyl-umbelliferyl-β-d-glucuronide (6-CM...
Article
Full-text available
Understanding hydrological processes in large, open areas, such as catchments, and further modelling these processes are still open research questions. The system proposed in this work provides an automatic end-to-end pipeline from data collection to information extraction that can potentially assist hydrologists to better understand the hydrologic...
Article
Passive sampling (PS) is a very useful approach for the monitoring of emerging contaminants in environmental matrices, showing greater sensitivity than can be achieved by current best practice - grab sampling - and is applicable to a wide variety of compounds. An EU Directive (2013/39/EC) has added substances to the existing Water Framework Directi...
Article
As nanotechnology has developed, the creation of nanostructured surfaces has garnered attention for their uses in sensing and catalysis applications. These are however often expensive, time-consuming, and difficult to produce. In contrast, this investigation is focused on the inexpensive, environmentally friendly and fast technique of Confined Atmo...
Conference Paper
Full-text available
Smart cities are getting essential to drive economic growth, increase social prospects and improve high-quality lifestyle for citizens. To meet the goal of smart cities, Information and Communications Technology (ICT) have a key role. The application of smart solutions will allow the cities to use ICT and big data to improve infrastructure and serv...
Article
Full-text available
Globally, the need for “on-site” algal-toxin monitoring has become increasingly urgent due to the amplified demand for fresh-water and for safe, “toxin-free” shellfish and fish stocks. Herein, we describe the first reported, Lab-On-A-Disc (LOAD) based-platform developed to detect microcystin levels in situ, with initial detectability of saxitoxin a...
Technical Report
Full-text available
http://www.epa.ie/pubs/reports/research/water/research243.html
Article
There is currently a gap in the use of centrifugal microfluidics in the field environmental sensing. This review provides therortical perspectives that have been demonstrated for applications in other domains...
Article
The development of a centrifugal device for quantitative analysis of both chromium (III) and (VI) species in water is reported. ChromiSense is a colourimetric sensor system that has been applied to the measurement of chromium in spiked river water samples. For analysis, the sample is loaded into a reservoir on the disposable microfluidic disc, alon...
Article
The demand for autonomous sensors for unattended, continuous nutrient monitoring in water is rapidly growing with the increasing need for more frequent and widespread environmental pollution monitoring. Legislative bodies, local authorities and industries all require frequent water quality monitoring, however, this is time and labour intensive, and...
Article
Much research has been carried out on the analysis of chemical residue pollutants in the aquatic environment including drinking water, lakes, rivers, ground water, estuaries and coastal zones. However, few studies report the analysis of wastewater for the presence of chemical pollutants, including pesticides, even though this is an important issue...
Conference Paper
Globally, fresh and brackish water sources are constantly under treat of exposure to toxins. Two of the most prevalent toxins from fresh and brackish water blooms are the cyclic peptide toxins of the microcystin family, formed from cyanobacterial, and the kainic acid analog neurotoxin known as domoic acid. There is therefore a significant need for...
Conference Paper
The MariaBox project, funded by the European Commission (Contract 614088), is developing an autonomous, analytical device, based on novel biosensors, for monitoring chemical and biological pollutants in sea water. The device, currently at first prototype level, is suitable for installation in free floating devices, buoys or ships. The main, high-le...
Article
Full-text available
The influence of surface topography (surface relief) on biofouling and cell settlement has been widely examined in the search for novel marine antifouling materials. Effects of surface topography on biofilms are, however, most commonly reported for laboratory experiments only. Marine diatoms are a particularly problematic group of biofouling organi...
Article
Full-text available
Here we show an easy to synthesize superhydrophobic material using a solvent phase–separation process of poly vinyl chloride. It is found that solvents mixed in different ratios increase the dielectric value of the solvent and can be tuned to produce superhydrophobic PVC. The PVC solution is then spin-coated onto glass slides for characterization u...
Poster
Full-text available
A description of the capabilities of the optimised Confined Atmospheric Pulsed-laser (CAP) deposition process, showing various large-scale shapes and nanomorphologies for deposited films.
Article
Welcome to this Analytical Methods themed issue on microplastics in the environment, guest edited by Chelsea M. Rochman, Fiona Regan and Richard C. Thompson. The editors hope that this editorial will facilitate discussions that lead toward harmonized methods that are informed by hypotheses, and ultimately produce data that can be synthesized and us...
Article
Full-text available
Link to full paper: http://www.readcube.com/articles/10.1007/s41101-016-0014-y?author_access_token=xN-WhWPp5ewcrWUydsjV9fe4RwlQNchNByi7wbcMAY5JAGvbngbNSOZ9WNQNzu6eHoyO0IYCohxYYw5GmI74ZM-Z0WXOVBoYIBPod44JYrO_GlSiRGdDtdDQEZp3F7EFrYxxb4t6AqVFSvDUpr1P3w%3D%3D Risk indices have recently emerged as an effective and efficient tool in the area of water qu...
Article
To achieve active management of bathing areas and to reduce risk associated with the presence of fecal pollution, tests capable of rapid on-site assessment of microbiological water quality are required. A protocol for the recovery and detection of fecal pollution indicator bacteria, E. coli, using β-glucuronidase (GUS) activity was developed. The d...
Article
Fouling-release coatings typically rely on a mechanical shear force (usually generated by movement in the marine environment) to remove bio-matter. This is problematic in situations where the surface of interest will remain in a static state (e.g. marine sensors). Here we investigate the antifouling properties of textured surfaces of regular patter...
Article
A portable, compact, centrifugal microfluidic system for the in situ quantitation of phosphate in water is reported. The device uses the ascorbic acid method, a colourimetric absorbance based assay, for phosphate determination. The integrated system consists of two components; the disposable centrifugal microfluidic disc and the complementary syste...
Conference Paper
Full-text available
Accurately monitoring water levels at high special and temporal scale is the key element in every catchment or flood risk management system. Building, evaluating and testing hydrological models typically require years of high frequency datasets. Current water level monitoring systems are expensive and usually deployed sparsely throughout a catchme...
Conference Paper
Described here is a novel arrangement of electronically-actuated wax valves for "Lab-on-a-Disc" (LoaD) centrifugal microfluidic platforms. A LoaD platform, with an integrated silver screen-printed layer, operates via a battery-powered electronic system connected to a pattern of electrical leads which is screen printed on a PET layer. The disc also...
Article
Metals occur naturally in the environment and as constituents of the earth's crust. They have many uses and metals such as iron, copper, and zinc are widely used in industry. Elevated levels of metals in the environment also occur as a result of human activities (municipal, residential and traffic related). A list of 15 metals chosen for this study...
Article
Full-text available
A number of double-armed calix[4]arene compounds, with proline-derived spirolactam ligating groups on the lower rim, have been synthesised and investigated as extractants of toxic heavy metal ions from aqueous solution. Pedersen’s extraction technique was employed to determine the capability of these new 1,3-distal derived calix[4]arene spiroalacta...