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Manassis Mitrakas

Bio: Manassis Mitrakas is an academic researcher from Aristotle University of Thessaloniki. The author has contributed to research in topics: Adsorption & Water treatment. The author has an hindex of 24, co-authored 126 publications receiving 2149 citations.


Papers
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Journal ArticleDOI
20 Jan 2016
TL;DR: In this paper, a review summarizes the recent research in the field of inorganic engineered nanoparticles development with direct or potential interest for drinking water treatment. But, despite early encouraging results, nanoparticles meet a number of limitations to get promoted and become part of large-scale water treatment plants.
Abstract: This review summarizes the recent research in the field of inorganic engineered nanoparticle development with direct or potential interest for drinking water treatment. The incorporation of engineered nanoparticles into drinking water treatment technologies against the removal of heavy metals, microorganisms and organic pollutants appears as a very dynamic branch of nanotechnology. Nanoparticles owe their potential to the high specific surface area and surface reactivity compared to conventional bulk materials. Depending on the mechanism of uptake, nanoparticles can be designed to establish high selectivity against specific pollutants and provide the required efficiency for application. However, despite early encouraging results, nanoparticles meet a number of limitations to get promoted and become part of large-scale water treatment plants. The most important is their availability in the required large quantities and their efficiency to fulfil the strict regulations for drinking water consumption and environmental safety. Both deal with the particle preparation cost and the cost of treatment operation with respect to the increase in supplied water price for the consumers. Under this view, this work attempts to evaluate reported studies according to their possibility to meet the reliable requirements of water technology and also suggests an experimental approach to allow validation of tested nanoparticles.

190 citations

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TL;DR: In this article, the Fe-MgO core-shell morphology is proposed within the single-domain nanoparticle regime as an enhanced magnetically driven hyperthermia carrier and a theoretical universal estimation of hysteresis losses reveals the role of dipolar interactions on heating effiency.
Abstract: The Fe-MgO core-shell morphology is proposed within the single-domain nanoparticle regime as an enhanced magnetically driven hyperthermia carrier. The combinatory use of metallic iron as a core material together with the increased particle size (37–65 nm) triggers the tuning of dipolar interactions between particles and allows for further enhancement of their collective heating effi ciency via concentration control. A theoretical universal estimation of hysteresis losses reveals the role of dipolar interactions on heating effi ciency and outlines the strong infl uence of coupling effects on hyperthermia opening a novel roadmap towards multifunctional heat-triggered theranostics particles.

135 citations

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TL;DR: In this article, the authors used magnetite powder to produce large quantities of nanostructured particles for As(III) and As(V) adsorption. But the results showed that these particles had high specific surface area but limited adorption capacity.

109 citations

Journal ArticleDOI
TL;DR: Findings indicate that under specific conditions, pollution of water by Cr(VI) is favorable by a slow MnO2-catalyzed oxidation of soluble Cr(III) to Cr( VI) in which manganese products [Mn(III)/Mn (II)] are probably re-oxidized by oxygen.

104 citations

Journal ArticleDOI
TL;DR: High surface charge and the activation of an ion-exchange mechanism between SO(4)(2-) adsorbed in the Stern layer and arsenate ions were found to contribute to the increased adsorption capacity.

98 citations


Cited by
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Journal ArticleDOI
TL;DR: An attempt has been made in this paper to review As contamination, its effect on human health and various conventional and advance technologies which are being used for the removal of As from soil and water.

851 citations

Journal ArticleDOI
TL;DR: A comprehensive review on membrane fouling in ODMPs with a focus on the elaboration of the factors and mechanisms governing the fouling behavior is provided in this paper, where a general osmotic-resistance filtration model is presented to assist in the interpretation of the intrinsic interrelationships among those fouling factors and mechanism.

629 citations

Journal ArticleDOI
TL;DR: A fundamental understanding of the operando OER mechanism for highly active perovskite catalysts is provided, which significantly differs from design principles based on ex situ characterization techniques.
Abstract: The growing need to store increasing amounts of renewable energy has recently triggered substantial R&D efforts towards efficient and stable water electrolysis technologies. The oxygen evolution reaction (OER) occurring at the electrolyser anode is central to the development of a clean, reliable and emission-free hydrogen economy. The development of robust and highly active anode materials for OER is therefore a great challenge and has been the main focus of research. Among potential candidates, perovskites have emerged as promising OER electrocatalysts. In this study, by combining a scalable cutting-edge synthesis method with time-resolved X-ray absorption spectroscopy measurements, we were able to capture the dynamic local electronic and geometric structure during realistic operando conditions for highly active OER perovskite nanocatalysts. Ba0.5Sr0.5Co0.8Fe0.2O3-δ as nano-powder displays unique features that allow a dynamic self-reconstruction of the material's surface during OER, that is, the growth of a self-assembled metal oxy(hydroxide) active layer. Therefore, besides showing outstanding performance at both the laboratory and industrial scale, we provide a fundamental understanding of the operando OER mechanism for highly active perovskite catalysts. This understanding significantly differs from design principles based on ex situ characterization techniques.

601 citations

Journal ArticleDOI
TL;DR: A broad overview of magnetic hyperthermia addressing new perspectives and the progress on relevant features such as the ad hoc preparation of magnetic nanoparticles, physical modeling of magnetic heating, methods to determine the heat dissipation power of magnetic colloids including the development of experimental apparatus and the influence of biological matrices on the heating efficiency is presented in this article.
Abstract: Nowadays, magnetic hyperthermia constitutes a complementary approach to cancer treatment. The use of magnetic particles as heating mediators, proposed in the 1950s, provides a novel strategy for improving tumor treatment and, consequently, patient's quality of life. This review reports a broad overview about several aspects of magnetic hyperthermia addressing new perspectives and the progress on relevant features such as the ad hoc preparation of magnetic nanoparticles, physical modeling of magnetic heating, methods to determine the heat dissipation power of magnetic colloids including the development of experimental apparatus and the influence of biological matrices on the heating efficiency.

545 citations

Journal ArticleDOI
TL;DR: Spinel ferrite (SF) magnetic materials are an important class of composite metal oxides containing ferric ions and having the general structural formula M 2+ Fe 2 3+ O 4.

523 citations