This work studies the feasibility to employ a combination of volcanic ash (natural waste) with different raw materials in production geopolymers: fly and mining tailing (considered hazardous solid waste), natural pozzolan, metakaolin. study compares properties geopolymers based on ash, metakaolin, relation 1:1 addition NaOH 15M Na2SiO3 as alkali activators. FTIR XRD assays mechanical tests were...

The study of Technosols development, spatial distribution and physicochemical characteristics is becoming more important in the Anthropocene Era. aim present was to assess soil features potential heavy metal release risk soils developed on different mine tailing types after waste disposal derived from mining activity Central Italy. Soils were analyzed for their morphological, physical chemical ...

Sulfide minerals (mainly FeS2) contained in lead-zinc tailings are easy to be acidified the air. The acidification mechanism is that tailing sand generates sulfuric acid and sulfate under catalysis of oxidant, water oxygen. acidic liquid generated by reaction will continue react with metal oxides form an insoluble precipitate.In order reveal corresponding changes chemical properties physical du...

Tailing incorporation into mortars has been the subject of much research in recent years. Despite this, most these studies did not investigate harmful effects resulting from exposure such to an environment containing aggressive agents. This work investigated perlite tailing addition cement CP V-ARI MAX and hydrated lime. The raw materials were subjected chemical characterization (X-ray fluoresc...

Jajarm Alumina Plant, the only Alumina powder producer in Iran, generates 500,000 tons of red mud annually. The commonest method for final disposal of red mud in Iran is Tailing dam which is neither cost-effective nor environmentally-friendly. The main objective of this study is to evaluate the possibility of red mud recovery to be used for stabilization of loose soils. Red mud samples have bee...

Sulfide lead resources are being depleted and the exploitation of carbonate lead deposits is now the main focus of lead mining. Cerussite, PbCO3, is majorly discarded to tailing damps because it is difficult to be processed by flotation in lead concentration units. This paper not only investigates the optimization of cerussite flotation, but it also proposes a model for predict...

When the wind turbine pitch system is in operation, due to strong coupling of internal structure system, it difficult accurately locate fault only relying on prior knowledge. And when using data-driven contribution graph method for location, influence variable, value non-fault variable will become larger, which cause a tailing effect and misdiagnosis. In this paper, multiblock kernel principal ...