نتایج جستجو برای: smelting
تعداد نتایج: 1730 فیلتر نتایج به سال:
Particulate Matter (PM(10)) has been one of the main air pollutants exceeding the ambient standards in most of the major cities in India. During last few years, receptor models such as Chemical Mass Balance, Positive Matrix Factorization (PMF), PCA-APCS and UNMIX have been used to provide solutions to the source identification and contributions which are accepted for developing effective and ef...
A comprehensive comparison of the levels and profiles of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) in fly ash samples from multiple industrial sources may help to prioritize sources and to understand discrepancies in profiles. In this study, PCDD/F data from 113 fly ash samples from 14 sources reported in previous studies were summarized and compared. The highest PCDD/F level...
Abstract The systematic investment and rearrangement of the unearthed artefacts Longtoushan Royal Cemetery Bohai Kingdom have provided a bunch new information for archaeometallurgy research on non-ferrous metal production. We synthesised latest discoveries several related mining/smelting sites urban relics making direct approach to chain copper production in this research. SEM-EDS p-XRF unveile...
The article deals with the problems of slags processing from copper-smelting production, both current production and those which had been accumulating over many years enterprises' activity in heaps (stale). There are data about possible methods slag processing. It is proposed a technology for joint stale Urals pyrite cinders (waste sulfuric acid) - smelting obtain poor matte, into copper precio...
Introduction The Harjavalta area (Figure 1) is one of the areas most seriously polluted by heavy metals in Finland. Copper smelting first started in 1945, and nickel smelting in 1959. The smelted ore concentrates contain sulphur, trace metals and arsenic. Although emissions of SO2 and heavy metals from the smelters have been strongly reduced in recent years (Figure 2), the topsoil of neighbouri...
The objective of this study was to evaluate stable Pb isotope signatures as a tracer for Pb contamination in Lake Andong. For Pb isotope analysis, we collected water and sediment from Lake Andong, particles in the air, soils, and stream water, mine tailings, sludge and wastewater from zinc smelting around lake Andong watershed. The results showed that Pb isotope ratios (Pb/Pb, Pb/Pb, and Pb/Pb)...
Lake Matano includes a complex of sites related to an iron-smelting industry that developed at the northeast tip South Sulawesi between 8th and 17th centuries AD. The include recently discovered underwater which possibly submerged because earthquake had occurred in region. An interesting finding each site is presence flaked artifacts from chert. This raises question what was role chert local tr...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید