Explanipedia

Enhancing phosphorus recovery from poultry litter ash through microwave-assisted thermochemical treatment for improving its solubility Open

Ario Fahimi, Mark S. Massa, Elsayed Mousa, Guozhu Ye, Georgeta Predeanu , et al. · 2025

This study explores for the first time the P recovery from poultry litter ash (PLA) using microwave-assisted thermochemical treatment, aiming to improve its bioavailability for utilization as a fertilizer. PLA samples, originating from lay…

Component Identification of Solid Biomass Fuels Using Reflected Light Microscopy: Interlaboratory Study 2 Open

Agnieszka Drobniak, María Mastalerz, Zbigniew Jelonek, Iwona Jelonek, Menandro N. Acda , et al. · 2025

Variation in the Composition of Municipal Solid Waste Incineration Ash Open

Bruno Valentim, Alexandra Guedes, Iwona Kuźniarska‐Biernacka, Joana Dias, Georgeta Predeanu · 2024

Unlike municipal solid waste bottom ash (MSWBA), fly ash (MSWFA) is landfilled due to its toxicity. However, MSWFA may also be a source of elements. Ash samples collected from a Portuguese MSW incinerator from different locations and over …

Graphitization: Microstructural and microtextural transformations of residual char from international coal combustion ash Open

Ana Cláudia Santos, Charlotte Badenhorst, Barbara Białecka, Ignacio Cameán, Alexandra Guedes , et al. · 2024

Natural graphite is a critical raw material and its substitution in some applications will contribute to reduce its supply risk. Coal ash, which is still produced in high amounts, contains a carbonaceous solid residue (char) that may be a …

Adsorption of Brilliant Green Dye onto a Mercerized Biosorbent: Kinetic, Thermodynamic, and Molecular Docking Studies Open

Andra-Cristina Enache, Corneliu Cojocaru, Petrişor Samoilă, V. Ciornea, Roxana Apolzan , et al. · 2023

This study reports the valorization of pistachio shell agricultural waste, aiming to develop an eco-friendly and cost-effective biosorbent for cationic brilliant green (BG) dye adsorption from aqueous media. Pistachio shells were mercerize…

Thermal and Viscoelastic Responses of Selected Lignocellulosic Wastes: Similarities and Differences Open

Daniela Ioniţă, Mariana Cristea, Susana Felicia Cosmulescu, Georgeta Predeanu, Valeria Harabagiu , et al. · 2023

Woody lignocellulosic biomasses comprise the non-edible parts of fruit trees. In recent years, the exploitation of this biomass has been widening in order to mitigate environmental issues. At the same time, this waste could be transformed …

An Eco-Friendly Modification of a Walnut Shell Biosorbent for Increased Efficiency in Wastewater Treatment Open

Andra-Cristina Enache, Petrişor Samoilă, Corneliu Cojocaru, Roxana Apolzan, Georgeta Predeanu , et al. · 2023

Herein, we report the performance of some low-cost biosorbents developed by environment-friendly modification of walnut shells. Two types of biosorbents were prepared by ecological modification of walnut shell surfaces: (1) biosorbents obt…

Thermal Maturity and Kerogen Type of Badenian Dispersed Organic Matter from the Getic Depression, Romania Open

Maria Doina Ghiran, Mihai Emilian Popa, Izabela Mariş, Georgeta Predeanu, Ștefania Gheorghe , et al. · 2023

The aim of this study is to evaluate the thermal maturity of Upper Badenian (Middle Miocene) petroleum source rocks of the Getic Depression, Romania, and to characterize the dispersed organic matter using organic petrography associated wit…

Green Synthesis of Advanced Carbon Materials Used as Precursors for Adsorbents Applied in Wastewater Treatment Open

Georgeta Predeanu, Valerica Slăvescu, Marius Florin Drăgoescu, Niculina Mihaela Bălănescu, Alexandru Fiti , et al. · 2023

Huge amounts of vegetable waste, mainly resulting from the food industry, need large areas for storage, as they could cause hazardous environmental impact, leading to soil and water pollution or to CO2 emissions during accidental incinerat…

Hydrothermal nitrogen doping of anthracene oil-derived activated carbons for wide voltage asymmetric capacitors Open

Agata Moyseowicz, Zoraida González, Sonia Melendi-Espina, Beatriz Acevedo, Georgeta Predeanu , et al. · 2023

This work focused on the development of doping procedures to introduce nitrogen functionalities on an activated carbon derived from anthracene oil to be subsequently used on wide voltage asymmetric capacitors. For that, ammonia solution wa…

New Insights on Coal Char Graphitization: Microstructural and Microtextural Transformations Open

Ana Cláudia Santos, Charlotte Badenhorst, Barbara Białecka, Ignacio Cameán, Alexandra Guedes , et al. · 2023

Oxidized Biomass and Its Usage as Adsorbent for Removal of Heavy Metal Ions from Aqueous Solutions Open

Bogdan-Constantin Condurache, Corneliu Cojocaru, Petrişor Samoilă, Susana Felicia Cosmulescu, Georgeta Predeanu , et al. · 2022

Nowadays, very coarse wool fibers are considered waste biomass and are discarded at random or burned. Therefore, it is of actual interest to valorize coarse wool fibers as utile products. In this sense, we report herein an environmentally-…

Incineration of Aviary Manure: The Case Studies of Poultry Litter and Laying Hens Manure Open

Ario Fahimi, Elza Bontempi, Laura Fiameni, Alexandra Guedes, R.C. Guimarães , et al. · 2022

Phosphorous and Silica Recovery from Rice Husk Poultry Litter Ash: A Sustainability Analysis Using a Zero-Waste Approach Open

Laura Fiameni, Ario Fahimi, Claudio Marchesi, Giampiero Pasquale Sorrentino, Alessandra Zanoletti , et al. · 2021

Phosphate rocks are a critical resource for the European Union, and alternative sources to assure the future production of a new generation of fertilizers are to be assessed. In this study, a statistical approach, combined with a sustainab…

Graphene materials from microwave-derived carbon precursors Open

Zoraida González, Beatriz Acevedo, Georgeta Predeanu, Sorin Mircea Axinte, Marius-Florin Drăgoescu , et al. · 2021

Anthracene oil has been used as raw material for the production of carbon precursors via conventional and microwave technologies. Cokes with comparable characteristics have been obtained, suggesting that their structural order is primarily…

Simultaneous amorphous silica and phosphorus recovery from rice husk poultry litter ash Open

Laura Fiameni, Ahmad Assi, Ario Fahimi, Bruno Valentim, Karen Moreira , et al. · 2021

Rice husk poultry litter ash (RHPLA) is proposed as a valuable secondary source to recover phopshorus and amorphous silica in three steps.

Assessment of Graphitized Coal Ash Char Concentrates as a Potential Synthetic Graphite Source Open

Charlotte Badenhorst, Ana Cláudia Santos, Juan M. Lázaro‐Martínez, Barbara Białecka, Mihai Cruceru , et al. · 2020

Coal ash char concentrates from four countries (Portugal, Poland, Romania, and South Africa) were prepared, characterised, and graphitized under the scope of the Charphite project (Third ERA-MIN Joint Call (2015) on the Sustainable Supply …

Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III) Open

Magdalena Misz‐Kennan, J. Kus, Deolinda Flores, Claudio Ávila, Zeynep Büçkün , et al. · 2020

COMPARISON BETWEEN THE PROPERTIES OF BUILDING MATERIALS MANUFACTURED FROM BOTTOM ASH AND FLY ASH PART II. RESULTS AND DISCUSSIONS Open

Bruno Valentim, Lucica Anghelescu, Barbara Białecka, Bogdan Diaconu, Alexandra Guedes , et al. · 2019

Bottom ash resulting from combustion of low-quality lignite in Romanian coal-fired power plants contains significant amounts of unburned carbon. This large value is caused by many factors, such as the high humidity value of the raw coal de…

COMPARISON BETWEEN THE PROPERTIES OF BUILDING MATERIALS MANUFACTURED FROM BOTTOM ASH AND FLY ASH PART I. MATERIALS AND PROCEDURES Open

Bruno Valentim, Lucica Anghelescu, Barbara Białecka, Bogdan Diaconu, Alexandra Guedes , et al. · 2019

Bottom ash resulting from combustion of low-quality lignite in Romanian coal-fired power plants contains significant amounts of unburned carbon. This large value is caused by many factors, such as the high humidity value of the raw coal de…

Microwave heating as a novel route for obtaining carbon precursors from anthracene oil Open

Georgeta Predeanu, Sorin Mircea Axinte, Marius-Florin Drăgoescu, Zoraida González, Patricia Álvarez , et al. · 2019

Undifferentiated Inorganics in Coal Fly Ash and Bottom Ash: Calcispheres, Magnesiacalcispheres, and Magnesiaspheres Open

Bruno Valentim, Barbara Białecka, Paula Alexandra Gonçalves, Alexandra Guedes, R.C. Guimarães , et al. · 2018

During a study aiming to recover strategic elements and minerals from coal fly ash and bottom ash (RAREASH and CHARPHITE projects funded, respectively, by the 2nd ERA-MIN and 3rd ERA-MIN Programs of the European Union Commission), it was f…

Carbon materials from conventional/unconventional technologies for electrochemical energy storage devices Open

Zoraida González, Georgeta Predeanu, Sorin Mircea Axinte, JJ Fernández, Ioan Călinescu , et al. · 2017

In the last years our society has shown a growing interest on the development of both new sources of clean energy and advanced devices able to store it. In this context supercapacitors (SCs) and hybrid systems have emerged to cover the pow…

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