Considering the BSSF steelmaking slag generated in a Brazilian steelwork, it would be worth to separate iron and calcium from it, with objective of increasing its content, or producing Fe2O3 CaO by selective precipitation cations aqueous solution. In this way, materials could produced used in-house, e.g., sintering plant. This possibility was explored through acid leaching for an industrial sam...

The rapid growth of technology has resulted in the deployment a large number interconnected devices, resulting wide range new societal services. Wireless sensor networks (WSNs) are promising which is faced with challenges operating nodes, information gathering, data transmission, and providing means to act different scenarios such as monitoring, surveillance, forest fire detection, many others ...

The discharge of septic tank effluent onto highly permeable soils may lead to nutrients entering the groundwater or flowing laterally from the site to pollute local streams. Seven domestic dwellings in a small village in northern New South Wales (NSW) were refurbished with new septic tank systems, and individual on-site land application systems were constructed to reduce the high risks of conta...

Most routing protocols designed for wireless sensor networks used the unit disk graph model (UGD) to represent the physical layer. This model does not take into account fluctuations of the radio signal. Therefore, these protocols must be improved to be adapted to a non-ideal environment. In this paper, we used the lognormal shadowing (LNS) model to represent a non-ideal environment. In this mod...

modern hydrometallurgical techniques have been adopted to produce high-purity gold. many extractants were used for the extraction of gold from various synthetic solutions from which dibutyl carbitol (dbc) had a unique superiority. kinetics of process was studied in this paper and the influence of several parameters such as stirring speed, agitation time, impeller type, interfacial area, [aucl4]...

A novel approach for recovering yttrium from high ferric and strong acidic sulphate leach solutions of deep-sea mud by stepwise extraction stripping has been developed. The results show that the first step N235+TBP system can extract H2SO4 well adjust raffinates to a desirable pH, while only iron was selectively co-extracted with negligible loss ions. organic solution be easily regenerated usin...

Efficient energy utilization and network life prolongation are primary objectives to be considered when designing a Wireless Sensor Network. Cluster-based routing protocols most suitable for achieving such goals. Energy Optimal Inter Cluster Head Distance (EOICHD) is cluster-based hierarchical protocol inspired by the Low-Energy Adaptive Clustering Hierarchy (LEACH) protocol. EOICHD resolves pr...