Results 21 to 30 of about 31,093 (293)

Comparison of lead removal behaviors and generation of water-soluble sodium compounds in molten lead glass under a reductive atmosphere

open access: yesResults in Physics, 2018
We propose a method of reduction-melting at 1000 °C, using a sodium-based flux, to recover lead from cathode-ray tube funnel glass. To recover the added sodium from the treated glass, we combined a reduction-melting process with a subsequent annealing ...
Takashi Okada   +3 more
doaj   +1 more source

Weathering of stannite–kësterite [Cu2(Fe,Zn)SnS4] and the environmental mobility of the released elements [PDF]

open access: yesEuropean Journal of Mineralogy, 2022
The sulfidic waste dumps of the historical mining sites Giftkies and Kaňk (Czech Republic) have been exposed to a temperate climate over decades. This exposure generated low-pH conditions caused by metal sulfide decomposition.
P. Haase   +4 more
doaj   +1 more source

Halite and stable chlorine isotopes in the Zag H3-6 breccia [PDF]

open access: yes, 2004
Zag is an H3-6 chondrite regolith breccia within which we have studied 14 halite grains ?3mm. The purity of the associated NaCl-H2O brine is implied by freezing characteristics of fluid inclusions in the halite and EPMA analyses together with a lack of ...
Banks, D.A.   +3 more
core   +1 more source

Jarosite versus Soluble Iron-Sulfate Formation and Their Role in Acid Mine Drainage Formation at the Pan de Azúcar Mine Tailings (Zn-Pb-Ag), NW Argentina [PDF]

open access: yes, 2014
Secondary jarosite and water-soluble iron-sulfate minerals control the composition of acid mine waters formed by the oxidation of sulfide in tailings impoundments at the (Zn-Pb-Ag) Pan de Azúcar mine located in the Pozuelos Lagoon Basin (semi-arid ...
Alicia Kirschbaum   +5 more
core   +3 more sources

Effects of Funneliformis mosseae and Potassium Silicate on Morphological and Biochemical Traits of Onion Cultivated under Water Stress

open access: yesHorticulturae, 2022
Water stress negatively impacts the physiology of plants, affecting their growth and development. It is considered among the most important environmental factors responsible for reduced crop production.
Meenakshi Sharma   +2 more
doaj   +1 more source

Mineral carbonation of ceramic brick at low pressure and room temperature. A simulation study for a superficial CO2 store using a common clay as sealing material [PDF]

open access: yes, 2018
This research explores the possibilities of CO2 sequestration on ceramic bricks in a short time and at surface conditions. The experiment was carried out in a specially designed reaction chamber, filled with brick wastes and sealed with common clays. The
Aparicio Fernández, Patricia   +2 more
core   +1 more source

Improving the Protectiveness of 3-Mercaptopropyl-Trimethoxysilane Coatings on Bronze by Addition of Oxidic Nano- and Microparticles [PDF]

open access: yes, 2020
The protectiveness of coatings based on 3-mercaptopropyl-trimethoxysilane (PropS-SH) applied on bronze artworks was enhanced by investigating and tuning a variety of factors.
BALBO, Andrea   +4 more
core   +1 more source

Low CO2 emission cement from alkali-activated gravel wash mud and quartzite dust [PDF]

open access: yesMATEC Web of Conferences
High CO2 emissions and rising energy costs result in an increasing demand for innovative, environmentally friendly and energy-efficient construction materials. Gravel wash mud (GWM) is a widely available industrial by-product from gravel mining which may
Kukemilks Karlis, Wagner Jean-Frank
doaj   +1 more source

Les silicates alcalins, matière de base des mousses minérales isolantes. Etude bibliographique Alkaline Silicates, As a Basic Material for Insulating Mineral Foams. Bibliographie Study

open access: yesOil & Gas Science and Technology, 2006
Dans cette étude bibliographique, on décrit les méthodes d'obtention des silicates alcalins ainsi que leurs propriétés et les propriétés de leurs polymères en insistant sur l'influence du pH, de la concentration et de la température sur la polymérisation
Lesage J., Mergier N.
doaj   +1 more source

Study of Ceramic Slurries for Investment Casting with Ice Patterns [PDF]

open access: yes, 2004
Ice patterns generated by rapid freeze prototyping or a molding process can be used to make ceramic investment molds for metal castings. Due to the use of ice, the ceramic slurries must be poured around the pattern and cured at sub-freezing ...
Leu, Ming C., Liu, Qingbin
core   +1 more source

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