Comparison of three different leaching tests, each characterized by different conditions, e.g. liquid/solid ratio, pH, leachant, stirring conditions, duration time, has been performed within the activities of Analeach, financed by the European Union in the "Cooperation with third Countries" programme (INCO). The comparison was performed on four highly homogenized fly ash reference materials, of different origin, provided by the Joint Research Centre of Ispra. Seven different elements (Cd, Cr, Cu, Ni, Pb, V, and Zn) were considered in this study. The influence of the main experimental conditions and of the matrix on metal release was studied. Basic characterization of the materials was also performed.
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http://dx.doi.org/10.1007/s002160100988 | DOI Listing |
Front Bioeng Biotechnol
January 2025
Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, College and Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China.
Introduction: Diabetes mellitus often leads to bone metabolism disorders, hindering bone regeneration and delaying the healing of bone defects. β-Ecdysone, a plant-derived hormone known for its wide range of physiological activities, possesses hypoglycemic effects and promotes osteogenic differentiation. This study developed a composite PLGA slow-release scaffold loaded with β-ecdysone to enhance its bioavailability through topical administration and to investigate its potential to heal diabetic bone defects.
View Article and Find Full Text PDFEnviron Res
January 2025
School of Creative Science and Engineering, Faculty of Science and Engineering, Waseda University, Tokyo, 169-8050, Japan; Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka, 819-0395, Japan. Electronic address:
Layered double hydroxides (LDHs) can effectively stabilize Se oxyanions, yet the thermal stability of Se oxyanions incorporated into LDHs remains unclear. In this study, calcination products of three types of LDHs loaded with SeO or SeO were analyzed using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray absorption fine structure spectroscopy (XAFS) and leaching tests. It has been found that SeO can be reduced to SeO in the Fe-containing LDHs after calcination at temperatures above 450 °C.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
Department of Chemical Engineering Materials Environment, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy.
This study introduces a sustainable approach for enhancing the fire retardancy and smoke suppression of poly(lactic acid) (PLA) composites, contributing to addressing one of the major challenges in biocomposites that limits their application in various engineering fields, as automotive and construction sectors. Flax fibers (FF) were surface functionalized with a novel organic-inorganic hybrid flame retardant (FR), offering a sustainable bioinspired approach that mitigates potential mechanical properties impairment and FR leaching, which can cause environmental concerns and reduced composite durability. The process involves a three-step coating procedure.
View Article and Find Full Text PDFBiol Trace Elem Res
January 2025
Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi-6205, Bangladesh.
Bisphenol A (BPA) is a monomer of plastic that can leach into water from scratched containers when used for an extended period. Arsenic (As) is an environmental toxicant, and people are exposed to both arsenic and BPA through drinking water and through scratched plastic containers used in contaminated areas. However, the combined effects of As and BPA on locomotor performance and neurobehavioral changes are yet to be investigated.
View Article and Find Full Text PDFJ Environ Manage
January 2025
School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, PR China.
Compared with zero-valent iron, iron sulfide has more diverse reactive species and higher reductivity, but it is still prone to be gradually deactivated due to various passivation factors. In this study, a novel reductive material (BMMW@OA) was prepared by ball milling of mackinawite (MW) as raw material and oxalic acid (OA) as modifier, so as to simultaneously improve its reductivity and stability by continuous releasing reductive species and maintaining freshness of the material surface. The BMMW@OA (w/w of MW/OA = 4/1) effectively removed Cr(Ⅵ) from water with wide pH adaptability.
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