BACKGROUND Beryllium exposure occurs in aluminium smelters from natural contamination of bauxite, the principal source of aluminium. AIMS To characterize beryllium exposure in aluminium smelters and determine the prevalence rate of beryllium sensitization (BeS) among aluminium smelter workers. METHODS A population of 3185 workers from nine aluminium smelters owned by four different aluminiu...

Karst bauxite is a major source of aluminum and contains high concentrations trace elements such as Li, Ga, Sc, rare earth (REEs). It regarded potential non-conventional REE due to the increasing demand for REEs. This study provides new mineralogical geochemical evidence Lindai deposit in central Guizhou Province, aiming analyze genesis minerals reveal forms REEs occurring these deposits. The r...

Informal lending and savings institutions exist around the world, and often include regular door-to-door deposit collection of cash. Some banks have adopted similar services in order to expand access to banking services in areas that lack physical branches. Using a randomized control trial, we investigate determinants of participation in a deposit collection service and evaluate the impact of o...

In addition to patch-level attributes (i.e., area and isolation), the nature of land cover between habitat patches (the matrix) may drive colonization and extinction dynamics in fragmented landscapes. Despite a long-standing recognition of matrix effects in fragmented systems, an understanding of the relative impacts of different types of land cover on patterns and dynamics of species occurrenc...

Muhammad Tariq, Muhammad Mansoor Iqbal, Abdul Aziz*, Muhammad Shafiq Muhammad Sajid and Bashir Mohammad Department of Mining University of Engineering and Technology Lahore. Central Analytical Facility Division, PINSTECH, Islamabad Pakistan. Department of Construction Environment Engineering, Korea University of Science and Technology, 305-350, Daejeon, Korea. College of Chemistry, Beijing Norm...

A reliability analysis of a dumper machine is performed using the neural network model. A metaheuristic algorithm is applied for proper parameter selection for the neural network. A time series approach is applied in the reliability analysis to forecast the dumper’s future failure time. The time series analysis is performed using the neural network model, where the numbers of input variables fo...

The chemical and mineral compositions of bauxite recovered from the Severoonezhsk Bauxite Mine (Arkhangelsk region, Russia) were studied by XRD, ICP-OES, TG/DSC, SEM, TEM, Mössbauer spectroscopy. iron-containing minerals bauxites found to comprise alumogoethite (α-Fe1–xAlxOOH), alumohematite (α-(Fe1–xAlx)2O3), alumoakaganeite (β-Fe1–xAlxO(OH,Cl)), chromite (FeCr2O4). efficiency Fe extraction HC...