Results 41 to 50 of about 28,933 (187)

Understanding the operational problems and fouling characterization of RO membrane used for brackish water treatment via membrane autopsy

Water Science and Technology, 2021
An autopsy of spiral wound reverse osmosis (RO) membrane operated in brackish water treatment was conducted to understand the origin and extent of foulants and fouling mechanisms.
Cigdem Balcik
doaj   +1 more source

Amino- and thiol-modified microporous silicalite-1 and mesoporous MCM-48 materials as potential effective adsorbents for Pb(II) in polluted aquatic systems

Adsorption Science & Technology, 2018
Aluminum-free zeolite silicalite-1 and the ordered mesoporous silicates Mobile Crystalline Material No. 48 (MCM-48) were prepared and functionalized with 3-aminopropyltriethoxysilane (APTES) and 3-mercaptopropyltrimethoxysilane (MPTMS) for the ...
Abeer A Malhis, Sharif H Arar, Manar K Fayyad, Hamdallah A Hodali   +3 more
doaj   +1 more source

Distribution and spatial autocorrelation of physical-water attributes of an Oxisol

Revista Brasileira de Engenharia de Biossistemas, 2023
Spatial autocorrelation, which in this work was calculated using Moran's bivariate analysis, can be defined as the coincidence of similar values in nearby locations, or the absence of randomness of a variable due to its spatial distribution.
Job Teixeira de Oliveira, Rubens Alves de Oliveira, Gloria Milena Rojas Plazas, Sinomar Moreira Andrade, Fernando França da Cunha   +4 more
doaj   +1 more source

Chemical diffusion of fluorine in melts in the system Na2OAl2O3SiO2 [PDF]

, 1985
The volatilization of fluorine from three melts in the system Na2OAl2O3SiO2 has been investigated at 1 atm pressure and 1200–1400°C. The melts chosen have base compositions corresponding to albite, jadeite and a peraluminous melt with 75 mole % SiO2 ...
Al-Dulaimy, Angell, Arzi, Bailey, Barlow, Bond, Christiansen, Christopher M. Scarfe, Crank, Delaney, Dingwell, Donald B. Dingwell, Dunn, Eadington, Harris, Hofmann, Hunnold, Jambon, Karsten, Kogarko, Kovalenko, Kumar, Lanford, Magaritz, Manning, Navrotsky, Riebling, Seifert, Shaw, Shimizu, Smith, Taylor, Watson, Wayne Burnham, Winchell   +34 more
core   +1 more source

Destruction of massive fragments in protostellar disks and crystalline silicate production [PDF]

, 2011
We present a mechanism for the crystalline silicate production associated with the formation and subsequent destruction of massive fragments in young protostellar disks. The fragments form in the embedded phase of star formation via disk fragmentation at
Andrews, Baraffe, Boley, Boss, Cha, D'Alessio, Dullemond, Dunham, Durisen, Hallenbeck, Harker, Kemper, Machida, Mennella, Nayakshin, Takeuchi, Vorobyov, Vorobyov, Vorobyov, Vorobyov, Vorobyov, Watson   +21 more
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Characterization of Ancient Mortars from Minoan City of Kommos in Crete

Heritage, 2021
This work characterizes ancient mortars used in construction of the Bronze Age Minoan port at Kommos in Crete. The port dates from c. 1850 BCE with port facilities at the harbor and residences on the Central hillside and the Hilltop. A Greek, Phoenician,
Pagona-Noni Maravelaki, Antonis Theologitis, Meral Budak Unaler, Chrysi Kapridaki, Kali Kapetanaki, James Wright   +5 more
doaj   +1 more source

Structural Modification of KAISiO4 Minerals [PDF]

, 1997
Kalsilite, a polymorph of KAISiO4 is an end member of nepheline-kalsilite series and the mineral was syn-thesized by hydorhermal methods. The synthetic kalsilite is hexagonal, P63, with a=5.151(5), c=8.690(8) A.
Okamoto, Yasuhiko
core   +1 more source

HYDROTHERMAL SYNTHESIS AND CHARACTERIZATION OF VANADIUM SILICATE MOLECULAR SIEVES WITH ANALCIME, MAGEDIITE AND ZSM-11 STRUCTURE [PDF]

Journal of Sciences, Islamic Republic of Iran, 2002
Vanadium silicates such as V-Al-analcime, V-analcime, V-magediite and V-ZSM-11 were synthesized using vanadium pentoxide or vanadyl sulfates. Vanadium silicates with analcime structure with and without aluminum (V-Al-analcime, V-analcime) were prepared ...
doaj  

Removal of chromium from Enugu coal using HCl as leaching agent

Journal of Applied Sciences and Environmental Management, 2018
This study investigated the removal of chromium from Enugu Coal with HCL as the leaching agent under different conditions such as Leaching Time, particle size, acid concentration, and volume of leaching agent.
S.E. Okoro, N.L. Eneh, C.O. Asadu
doaj   +1 more source

A literature review of the latest trends and perspectives regarding alkali-activated materials in terms of sustainable development

Journal of Materials Research and Technology, 2023
The purpose of the paper was to analyze trends in the formation of alkali-activated materials (AAMs) produced from alternative starting materials to blast furnace slags and fly ash.
Agnieszka Ślosarczyk, Jan Fořt, Izabela Klapiszewska, Marta Thomas, Łukasz Klapiszewski, Robert Černý   +5 more
doaj   +1 more source