Zobrazeno 1 - 10
of 111
pro vyhledávání: '"MARIA HARJA"'
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
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:
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
Autor:
Marinela Bărbuţă, Maria Harja
Publikováno v:
Bulletin of the Polytechnic Institute of Jassy: Constructions, Architechture Section, Vol LIV (LVIII), Iss 3, Pp 13-22 (2008)
Polymer concrete is a composite material realized with resin and aggregates. In the present study the epoxy resin was used for binding the aggregates. In the composition were introduced near the fly ash, used as filler, the cellulose fibers. The mech
Externí odkaz:
https://doaj.org/article/03fa9d5dd9e54912ab722fd3c8c587c4
Autor:
Maria Harja Ioniţă, Marinela Bărbuţă
Publikováno v:
Bulletin of the Polytechnic Institute of Jassy: Constructions, Architechture Section, Vol LIV (LVIII), Iss 2, Pp 53-60 (2008)
In the paper are presented the results of some experimental researches concerning polymer mortars and concretes realized of epoxy resin, silica fume and crushed aggregates. The mechanical characteristics of hardened concrete were determined. The sili
Externí odkaz:
https://doaj.org/article/bce54d57174c459e8b3f5ba1e91bff9a
Researches in material oxides offers solutions in a variety of fields including environment, energy production and storage, biotechnology, medicine and healthcare, electronics, etc. Nanomaterials have concerned attention in recent decades due to thei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f62fcb52f8d09cd0a2198d583edee38
Autor:
Lidia Favier, null Andrei-Ionuț Simion, Raluca Maria Hlihor, Ildikó Fekete-Kertész, Mónika Molnár, Maria Harja, Christophe Vial
Publikováno v:
Journal of Environmental Management
Journal of Environmental Management, 2023, 328, pp.116928. ⟨10.1016/j.jenvman.2022.116928⟩
Journal of Environmental Management, 2023, 328, pp.116928. ⟨10.1016/j.jenvman.2022.116928⟩
International audience; Heterogeneous photocatalysis has been increasingly investigated during the past years and has been recognized as a promising technique for clean and safe water purification. The current study exploits the advantage of this tec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e32034be7a4ebeadd184a156ba749d99
https://hal.science/hal-03927490
https://hal.science/hal-03927490
Autor:
Nicolae Apostolescu, Ramona Elena Tataru Farmus, Maria Harja, Mihaela Aurelia Vizitiu, Corina Cernatescu, Claudia Cobzaru, Gabriela Antoaneta Apostolescu
Publikováno v:
Materials; Volume 16; Issue 2; Pages: 850
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://explore.openaire.eu/search/publication?articleId=doi_dedup___::84a31a4fa58d90b3ee88df27f3d516ed