Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Noemi-Raquel Checca-Huaman"'
Autor:
Juan A. Ramos-Guivar, Renzo Rueda-Vellasmin, Erich V. Manrique-Castillo, F. Mendoza-Villa, Noemi-Raquel Checca-Huaman, Edson C. Passamani
Publikováno v:
Polymers, Vol 16, Iss 11, p 1581 (2024)
Using a modified co-precipitation method, 11(2) nm γ-Fe2O3 nanoparticles functionalized with PSSNa [Poly(sodium 4-styrenesulfonate)] saloplastic polymer were successfully synthesized, and their structural, vibrational, electronic, thermal, colloidal
Externí odkaz:
https://doaj.org/article/f565a8584b4d433ea11b9ca165d78fcc
Publikováno v:
Applied Surface Science Advances, Vol 18, Iss , Pp 100489- (2023)
A novel magnetic composite of zeolite 5A and maghemite nanoparticles has been synthesized at 300 K and its lead removal properties from the Peruvian river Cumbaza were systematically studied. Its kinetic adsorption properties were investigated, and a
Externí odkaz:
https://doaj.org/article/be6d7268542e404493ced77896b5c1a7
Autor:
Juan A. Ramos-Guivar, Yacu V. Alca-Ramos, Erich V. Manrique-Castillo, F. Mendoza-Villa, Noemi-Raquel Checca-Huaman, Renzo Rueda-Vellasmin, Edson C. Passamani
Publikováno v:
Nanomaterials, Vol 14, Iss 9, p 785 (2024)
A novel magnetic composite made of Peruvian pyroclastic dust material decorated with maghemite nanoparticles was synthesized and characterized using a variety of analytic techniques. The 13 nm maghemite nanoparticles were grown on the pyroclastic dus
Externí odkaz:
https://doaj.org/article/e2fa116f44b24717afa6564b80885277
Autor:
F. Mendoza-Villa, Noemi-Raquel Checca-Huaman, Tainara L. G. Costa, Jair C. C. Freitas, Juan A. Ramos-Guivar
Publikováno v:
Toxics, Vol 12, Iss 4, p 252 (2024)
In this work, the synthesis and structural, thermal, vibrational, morphological, and electronic characterization of 2D-like pure graphene oxide (GO) and phosphorus-containing graphene oxide (GOP) sheets were investigated. The average thicknesses of G
Externí odkaz:
https://doaj.org/article/985466fb439c4e1cbe7c6c82090b65fc
Autor:
Miguel A. Vasquez-Caballero, Yamerson Canchanya-Huaman, Angie F. Mayta-Armas, Jemina Pomalaya-Velasco, Noemi-Raquel Checca-Huaman, Yéssica Bendezú-Roca, Juan A. Ramos-Guivar
Publikováno v:
Molecules, Vol 28, Iss 12, p 4596 (2023)
The adsorption characteristics of titanium dioxide nanoparticles (nano-TiO2) for the removal of Pb(II) from irrigation water were investigated in this work. To accomplish this, several adsorption factors, such as contact time and pH, were tested to a
Externí odkaz:
https://doaj.org/article/0eafe3dab3504e83890c8c6891d03888
Publikováno v:
Nanomaterials, Vol 13, Iss 10, p 1684 (2023)
Real water remediation is an important issue that requires the development of novel adsorbents with remarkable adsorption properties, permitting reusability. In this work, the surface and adsorption properties of bare magnetic iron oxide nanoparticle
Externí odkaz:
https://doaj.org/article/f31e345273fd4cb59c4966cf1a40f6c7
Autor:
Angie F. Mayta-Armas, Yamerson Canchanya-Huaman, Jemina Pomalaya-Velasco, Yéssica Bendezú-Roca, Noemi-Raquel Checca-Huaman, Juan A. Ramos-Guivar
Publikováno v:
Water, Vol 15, Iss 10, p 1892 (2023)
Zeolites 5A were obtained by ion exchange of a zeolite 4A, previously synthesized by the hydrothermal method from precursor kaolin, with the aim of removal As(V) from drinking water and Pb(II) from irrigation surface water. Zeolite 5A was characteriz
Externí odkaz:
https://doaj.org/article/323143d016bc49dcbaae683e79d02323
Publikováno v:
Nanomaterials, Vol 13, Iss 5, p 927 (2023)
In this work, the structural, vibrational, morphological, and colloidal properties of commercial 15.1 nm TiO2 nanoparticles (NPs) and nanowires (NWs, 5.6 thickness, 74.6 nm length) were studied with the purpose of determining their ecotoxicological p
Externí odkaz:
https://doaj.org/article/b3b33910ffbe40cca8429af253a7a09c
Autor:
Yacu Vicente Alca-Ramos, Noemi-Raquel Checca-Huaman, Enrique Arévalo-Gardini, Cesar O. Arévalo-Hernández, Juan A. Ramos-Guivar
Publikováno v:
Agriculture, Vol 13, Iss 3, p 599 (2023)
In search of efficient solutions for the treatment of contaminated soils and in favor of the sustainable development of agriculture, this work aimed at developing an efficient method that helps to directly overcome the contamination by nickel in soil
Externí odkaz:
https://doaj.org/article/f34fc6a21f0e461faae141cafd5d19b1
Autor:
Roberto Salazar-Rodriguez, Domingo Aliaga Guerra, Jean-Marc Greneche, Keith M. Taddei, Noemi-Raquel Checca-Huaman, Edson C. Passamani, Juan A. Ramos-Guivar
Publikováno v:
Nanomaterials, Vol 12, Iss 19, p 3516 (2022)
Fe-substituted YFexCr1−xO3 crystalline compounds show promising magnetic and multiferroic properties. Here we report the synthesis and characterization of several compositions from this series. Using the autocombustion route, various compositions (
Externí odkaz:
https://doaj.org/article/9eeebd3e9c9b412c9da8af7306833e26