Andreas Gondikas

Andreas Gondikas
National and Kapodistrian University of Athens | uoa · Faculty of Geology and Geoenviromment

PhD

About

32
Publications
8,071
Reads
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2,301
Citations
Additional affiliations
December 2018 - present
National and Kapodistrian University of Athens
Position
  • Group Leader
January 2018 - present
AXIA Innovation
Position
  • Project Manager
September 2016 - December 2017
University of Gothenburg
Position
  • PostDoc Position

Publications

Publications (32)
Article
Full-text available
Anthropogenic particles at the micro- and nano-scale are posing risks to human health and the ecosystem. Engineered nanomaterials, micro- and nano-plastics, soot, road and tire wear are a few prominent examples of particles that are either intentionally manufactured or incidentally produced and released into the environment. Analytical developments...
Article
Full-text available
Almost three-quarters of known volcanic activity on Earth occurs in underwater locations. The presence of active hydrothermal vent fields in such environments is a potential natural hazard for the environment, society, and economy. Despite its importance for risk assessment and risk mitigation, the monitoring of volcanic activity is impeded by the...
Chapter
Engineered nanomaterials (ENMs), i.e., man-made particles having at least one dimension smaller than 100 nm, have found their way into the environment. Parallel to the efforts to elucidate the possible harmful effects of ENMs, techniques have been developed to monitor environmental ENM concentrations. This chapter discusses the techniques that can...
Article
Full-text available
Coastal seas and oceans receive engineered nanoparticles that are released from nano-enabled consumer and industrial products and incidental nanoparticles that are formed as byproducts of combustion and friction. The marine environment is often perceived as a rapid sink for particles, because of the high salinity promoting the attachment between pa...
Article
Full-text available
Almost three quarters of known volcanic activity on Earth occurs in underwater locations. The presence of active hydrothermal vent fields in such environments is a potential natural hazard for the environment, the society, and the economy. Despite its importance for risk assessment and risk mitigation, monitoring of the activity is impeded by the r...
Article
Full-text available
Heteroaggregation of engineered nanoparticles (ENPs) with suspended particulate matter (SPM) ubiquitous in natural waters often dominates the transport behaviour and overall fate of ENPs in aquatic environments. In order to provide meaningful exposure predictions and support risk assessment for ENPs, environmental fate and transport models require...
Article
Nanoenabled products (NEPs) have numerous outdoor uses in construction, transportation or consumer scenarios, and there is evidence that their fragments are released in the environment at low rates. We hypothesized that the lower surface availability of NEPs fragment reduced their environmental effects with respect to pristine nanomaterials. This h...
Article
Full-text available
Background/aim: Androgen deprivation therapy is usually in the initial phase a successful treatment for prostate cancer but eventually most patients develop androgen-independent metastatic disease. This study investigated if manganese (Mn) reduces viability of prostate cancer via induction of apoptosis. Materials and methods: The prostate cancer...
Article
Detecting and quantifying nanoparticles (NPs) in complex environmental matrices, and distinguishing between natural nanoparticles (NNPs) and engineered nanoparticles (ENPs) that often exhibit very similar properties, requires reliable and sensitive analytical tools that are both time-efficient and cost-efficient. Titanium dioxide (TiO2) NPs, for in...
Article
The life cycle of nanoscale pigments in plastics may cause environmental or human exposure by various release scenarios. We investigated spontaneous and induced release with mechanical stress during/after simulated sunlight and rain degradation of polyethylene (PE) with organic and inorganic pigments. Additionally, primary leaching in food contact...
Article
Full-text available
The affinity between nano-scale zero-valent iron (nano-ZVI) and mineral surfaces hinders its mobility, and hence its delivery into contaminated aquifers. We have tested the hypothesis that the attachment of poly(acrylic acid)-coated nano-ZVI (PAA-nano-ZVI) to mineral surfaces could be limited by coating such surfaces with sodium (Na) humate prior t...
Article
Full-text available
High Ca concentrations in complex matrices such as river waters often hamper detection of titanium nanomaterials (TiO2 NPs) by single particle inductively coupled plasma mass spectrometry (spICPMS), because of isobaric interferences of ⁴⁸Ca on the most abundant Ti isotope (⁴⁸Ti). Several approaches were used to reduce this interference while measur...
Article
The discrimination of engineered nanoparticles (ENPs) from the natural geogenic background is one of the preeminent challenges for assessing their potential implications. At low ENP concentrations, most conventional analytical techniques are not able to take advantage of inherent differences (e.g. in terms of composition, isotopic signatures, eleme...
Article
Full-text available
For drug delivery, characterization of liposomes regarding size, particle number concentrations, occurrence of low-sized liposome artefacts and drug encapsulation are of importance to understand their pharmacodynamic properties. In our study, we aimed to demonstrate the applicability of nano Electrospray Gas-Phase Electrophoretic Mobility Molecular...
Article
Full-text available
Liposomes are biodegradable nanoparticle vesicles consisting of a lipid bilayer encapsulating an aqueous core. Entrapped cargo material is shielded from the extra-vesicular medium and sustained release of encapsulated material can be achieved. However, application of liposomes as nano-carriers demands their characterization concerning size and size...
Poster
Full-text available
icpTOF enables the determination of elemental composition of single nanoparticles along with size and concentration. This unique property can be used for detection of nanoparticles in complex mixtures. For example, for studying the fate of engineered nanoparticles or tracing them in the environment.
Article
Full-text available
Regulatory efforts rely on nanometrology for the development and implementation of laws regarding the incorporation of engineered nanomaterials (ENMs) into industrial and consumer products. Copper is currently one of the most common metals used in the constantly developing and expanding sector of nanotechnology. The use of copper nanoparticles in p...
Article
Full-text available
Environmental exposure modeling has been used extensively in the last years to obtain estimates of environmental concentrations of engineered nanomaterials (ENMs). In this perspective piece, we explore the issues when aiming to validate modeled environmental concentrations and propose options for both modelers and analytical chemists on how to proc...
Article
The production and use of nanoparticles leads to the emission of manufactured or engineered nanoparticles into the environment. Those particles undergo many possible reactions and interactions in the environment they are exposed to. These reactions and the resulting behavior and fate of nanoparticles in the environment have been studied for decades...
Article
Die Produktion und Verwendung von Nanopartikeln haben zur Folge, dass synthetische Nanopartikel in die Umwelt freigesetzt werden, wo sie vielfältige Reaktionen und Wechselwirkungen eingehen können. Für natürlich vorkommende Nanopartikel (1–100 nm) und Kolloide (1–1000 nm) werden solche Reaktionen und das daraus resultierende Verhalten und der Verbl...
Article
Monitoring data are necessary for the future production of engineered nanomaterials and the development of regulations for nanomaterials. Therefore, it is necessary to develop methods that reliably detect and quantify nanomaterials in real-world systems at expectedly low concentrations. In this work we tested several methodological approaches to de...
Article
Tailings impoundment Slovinky (eastern Slovakia) was used for deposition of flotation sludge from processing of siderite-sulphidic ores and in the latest phase for the deposition of slag material from processing of Cu ores in Metallurgical plant Krompachy. The impoundment sediments contain high average concentrations of potentially toxic elements (...
Article
To study the effects of complex environmental media on silver nanoparticle (AgNP) toxicity, AgNPs were added to microcosms with freshwater sediments and two species of aquatic plants (Potamogeton diversifolius and Egeria densa), followed by toxicity testing with microcosm surface water. Microcosms were designed with four environmental matrices in o...
Article
To better understand their fate and toxicity in aquatic environments, we compared the aggregation and dissolution behavior of gum arabic (GA) and polyvinylpyrrolidone (PVP) coated Ag nanoparticles (NPs) in aquatic microcosms. There were four microcosm types: surface water; water and sediment; water and aquatic plants; or water, sediment, and aquati...
Article
The persistence of silver nanoparticles in aquatic environments and their subsequent impact on organisms depends on key transformation processes, which include aggregation, dissolution, and surface modifications by metal-complexing ligands. Here, we studied how cysteine, an amino acid representative of thiol ligands that bind monovalent silver, can...
Article
The rapidly increasing use of silver nanoparticles (Ag NPs) in consumer products and medical applications has raised ecological and human health concerns. A key question for addressing these concerns is whether Ag NP toxicity is mechanistically unique to nanoparticulate silver, or if it is a result of the release of silver ions. Furthermore, since...
Article
Nanoparticulate metal sulfides such as ZnS are important for the speciation of pollutant metals in sediments, wastewater effluent, and other sulfidic environments. In these settings, particles of ZnS are formed in the presence of natural organic acids such as humic substances, proteins and other biomolecules that will interfere with cluster growth...
Article
Mineral sulfide colloids and nanoparticles are important for the aquatic fate and transport of toxic metals such as zinc and mercury in anaerobic environments. The persistence of metal sulfides in the colloidal form is likely to depend on surface interactions with dissolved natural organic matter. In this work, we investigated the sorption of cyste...
Article
Mn is of toxicological concern because overexposure can lead to progressive, permanent neurodegenerative damage. Monomethyl-Mn-pentadienyl-tricarbonyl (MMT) is used as an anti-knock agent in fuel. Exhausted Mn compounds are absorbed in the lung and transported to the liver. Extended exposure causes an overflow of the liver with Mn species moving e....

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Projects (4)
Project
Due to their small size, nanoparticles are likely to diffuse in water and follow water currents, thus impacting large areas and living organisms. They may also pass through biological membranes and exhibit higher reactivities compared to bulkier structures of the same material. These features render nanoparticles a potential risk for the ecosystem and human health. On the other hand, naturally occurring nanoparticles have been present since the beginning of time, but due to the lack of instrumentation with the necessary resolution, their existence has been largely neglected. Recent advancements in analytical chemistry have revealed the world of nano to scientists, spurring the rapid advancement of nanotechnology. Our goal is on the one hand to improve our understanding on the formation and fate of naturally occurring nanoparticles and on the other hand to quantify the impact that nanotechnology may have on the natural environment.