Risultati di ricerca
4 giorni fa · The green energy transition requires rare earth elements (REE) for the permanent magnets used in electric cars and wind turbines. REE extraction and beneficiation are chemically intensive and highly damaging to the environment. We investigated the use of eggshell waste as a sustainable alternative sorbent for the capture and separation of REE from aqueous solutions. Hen eggshell calcite was ...
20 ore fa · The Albian–Aptian Goru Formation represents a fluvio-deltaic reservoir in both the Central and Southern Indus Basin, Pakistan. Using high-resolution core data, this study provides comprehensive insights into the depositional environment and its role in influencing reservoir heterogeneities in the studied formation. The sedimentological investigations demonstrate five lithofacies, namely, (i ...
1 giorno fa · The dissolution indicators show slight rises in dissolution at the base of the ETM2, albeit differently for different proxies (Figure 4a and Tables S4 and S5 in Supporting Information S1). Overall fragmentation is low with values of ∼11%, increasing to 40% and 58% close to the onset of the ETM2 CIE but preceding its peak.
4 giorni fa · He et al. [127] studied the dissolution behavior and porous kinetics of limonitic laterite during nitric acid atmospheric leaching. The results show that the leaching behavior of Fe and Ni is consistent, and the dissolution of goethite is a progressive disintegration process from the outside to the interior.
1 giorno fa · Within Earth's crust, iridium is found at highest concentrations in three types of geologic structure: igneous deposits (crustal intrusions from below), impact craters, and deposits reworked from one of the former structures.
3 giorni fa · Soil EC ~ 0.1 - 16 dS/m • Indicator of soil salinity (EC high), and the leaching (EC low). Measuring salts in soil In the laboratory Reliable, easy to do, and quick e..g. using probe (units dS/m or S/cm ) EC measured in different ways: EC e = the EC of extract of a saturated paste of soil sample; EC 1:5 1:5 soil:water suspension.
3 giorni fa · Department of Earth Sciences. News. Read more. ‘Missing’ sea sponge fossils discovered. 5 June 2024. The discovery, published in Nature, opens a new window on early animal evolution At first glance, the simple, spikey sea sponge is no creature of mystery. No brain. No gut. No problem dating them back 700 million years.
