Search results for "Leaching test"
showing 5 items of 5 documents
Historical mortars dating from OSL signal of fine grain fraction enriched in quartz
2013
Abstract In the last years the mortar dating through Optically Stimulated Luminescence (OSL) techniques has become a viable support for chronological estimations (date of construction or restoration episodes) of historical buildings. However, the dating of mortar has still open issues mainly regarding the assessment of the bleaching degree of quartz, the analysis of the OSL processes for this type of samples and the need to do appropriate tests for the most correct evaluation of the equivalent dose. This paper discusses the results obtained by OSL dating (blue diode stimulation) on the polymineral fine grain phase, enriched in quartz, extracted from lime mortar samples collected from differ…
Chromium liquid waste inertization in an inorganic alkali activated matrix: Leaching and NMR multinuclear approach
2015
A class of inorganic binders, also known as geopolymers, can be obtained by alkali activation of aluminosilicate powders at room temperature. The process is affected by many parameters (curing time, curing temperature, relative humidity etc.) and leads to a resistant matrix usable for inertization of hazardous waste. In this study an industrial liquid waste containing a high amount of chromium (≈ 2.3 wt%) in the form of metalorganic salts is inertized into a metakaolin based geopolymer matrix. One of the innovative aspects is the exploitation of the water contained in the waste for the geopolymerization process. This avoided any drying treatment, a common step in the management of liquid ha…
Determination of Water-Soluble Trace Elements in the PM10 and PM2.5 of Palermo Town (Italy)
2022
This study contributes to the current knowledge on the solubility of trace elements in the atmospheric particulate matter of the urban area of Palermo. Daily sample filters of PM10 and PM2.5 were collected in monitoring stations within and outside the urban area, characterized by variable traffic density. The bulk of compositions in PM10 and PM2.5 were determined by ICP-MS. The water-soluble trace elements (WSTE) and major ion components of particulate matter were determined by ICP-MS and ion chromatography, respectively. A significant difference in the metals content was observed between the samples taken in urban areas and those from suburban areas. The calculated enrichment factor highli…
The comparative research of leaching tests and the sequential chemical extraction based on the environmental risk assessment by a selected type of wa…
2020
The problem of the circulation of metal ions in the environment remains a current problem in view of the quality of received agricultural crops. The necessity of increasingly frequent use of alternative sources of biogenesis in the form of waste substances poses a threat of bringing significant amounts of heavy metals harmful to human health and life to soils. The article discusses a significant problem, which is the comparison of the results of the environmental impact assessment of waste obtained based on the implementation of legitimate leaching tests (the three-stage leachability test according to PN-Z-15009) with the results obtained from sequential chemical extraction tests according …
Comparative analysis of the evaluation of the influence of waste on the environment depending on the applied research method (on the example of brown…
2019
The problem of the migration of metal ions in the environment remains a current problem in light of the quality of obtained crops. The necessity of more and more frequent use of alternative sources of biogens in the form of waste substances, poses a threat of loading significant amounts of metals into the soil – including heavy metals harmful to human health and life. The article discusses a significant problem, namely the comparison of the results of the environmental impact of waste, obtained on the basis of legally authorized leaching tests (three-stage leaching test according to PN-EN 12457:2006), with results obtained from sequential chemical extraction (performed in 4-step chemical ex…