Zobrazeno 1 - 10
of 132
pro vyhledávání: '"MARIA HARJA"'
Publikováno v:
Materials, Vol 17, Iss 16, p 3992 (2024)
The present study aimed to use geopolymer materials synthesized from different fly ashes, which are promising for the adsorption of copper ions from aqueous solutions. The characterization of fly ashes and prepared adsorbents was performed by energy-
Externí odkaz:
https://doaj.org/article/9fcb465526f542a0a5aaa68a32f23ce5
Publikováno v:
Journal of Composites Science, Vol 8, Iss 7, p 256 (2024)
Fiberglass is a waste generated in the construction materials industry, which is not dangerous for the environment, but long-term and very long-term storage is expensive. Finding a method of reuse as in creating a useful composite material led to the
Externí odkaz:
https://doaj.org/article/65139f270550407ea0f6bf26a5a005ec
Publikováno v:
Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, Vol 24, Iss 1, Pp 049-060 (2023)
The fly ash wastes (materials rich in silica, aluminum, and iron) could be advanced valorized by using as pozzolanic materials in the formulation of mortar and concrete. The partial hydrolysis of its, during alkali activation process, gel formation,
Externí odkaz:
https://doaj.org/article/379605229e1c46f39a5c67c88ddbfb82
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-18 (2022)
Abstract The Congo Red dye was removed from a simulated textile wastewater solution using fly ash from a local power plant. The characterisation of fly ash was studied in detail by SEM, EDX, XRD, FTIR, BET surface area and TGA techniques. The influen
Externí odkaz:
https://doaj.org/article/583d2d6e3a7e4da5a14947759789c9fc
Publikováno v:
Materials, Vol 16, Iss 17, p 5957 (2023)
Glass is a substance that is present in most houses since glass-based items are made and consumed in relatively high quantities. This has led to the buildup of glass in concerning quantities all over the world, which is a problem for the environment.
Externí odkaz:
https://doaj.org/article/d1f730fd91b247d497763f0ec9ddc4c4
Autor:
Gabriela BUEMA, Nicoleta LUPU, Horia CHIRIAC, Dumitru Daniel HEREA, Lidia FAVIER, Gabriela CIOBANU, Loredana FORMINTE (LITU), Maria HARJA
Publikováno v:
Journal of Applied Life Sciences and Environment, Vol 54, Iss 1(185), Pp 42-50 (2021)
The fly ash generated from a Romanian power plant was used as a starting material in this study. The aim of the study was to obtain a low cost material based on the treatment of fly ash with Fe3O4 for utilization as an adsorbent for cadmium ion remov
Externí odkaz:
https://doaj.org/article/90f7fa8aac764490ad6d24fae0c94f9f
Publikováno v:
Journal of Applied Life Sciences and Environment, Vol 54, Iss 1(185), Pp 70-76 (2021)
This work focused on the use of cellulose acetate polymer for the preparation of porous asymmetric membranes using a phase inversion process. These membranes were characterised by scanning electron microscopy, a bubble-point method and sorption measu
Externí odkaz:
https://doaj.org/article/fe09edb9a74a47c9a1d0d0239eb62a0f
Publikováno v:
Water, Vol 15, Iss 4, p 768 (2023)
This study aimed to analyse the bioaccumulation of heavy metal ions in plants of spontaneous flora. An urban area was established from which soil samples were taken and analyses were performed on the content of heavy metal ions. The soil samples were
Externí odkaz:
https://doaj.org/article/6dad8632dd9a49cd8dc4fec8963edb1b
Autor:
Nicolae Apostolescu, Ramona Elena Tataru Farmus, Maria Harja, Mihaela Aurelia Vizitiu, Corina Cernatescu, Claudia Cobzaru, Gabriela Antoaneta Apostolescu
Publikováno v:
Materials, Vol 16, Iss 2, p 850 (2023)
CeO2/ZnO-based photocatalytic materials were synthesized by the sol-gel method in order to establish heterojunctions that increase the degradation efficiency of some types of antibiotics by preventing the recombination of electron–hole pairs. The s
Externí odkaz:
https://doaj.org/article/74a0f498056448a7b3912f8a17bfd0bb
Publikováno v:
Magnetochemistry, Vol 8, Iss 10, p 125 (2022)
The effectiveness of a Fe3O4-loaded fly ash composite for the adsorption of Congo red dye was assessed in this work. The structure and properties of the magnetic adsorbent were established by scanning electron microscopy (SEM), energy dispersive spec
Externí odkaz:
https://doaj.org/article/5eb8445d1ae74a1fbdd74c9242291ea2