sirri island is one of the most important islands in iran where contains massive amounts of crude oil reservoirs and is a crude oil exporting and storage spot. petroleum sludge wastes produced by the refineries are deposited in outdoor 2-ha open pits. 30 sludge samples from different depot locations were conducted in 3-time intervals and mixed with each other to form one homogenized sample. the...

The main aim of this work was to test the ability an amino acid (i.e. glycine) leach cobalt from Li ion batteries (LiBs). process parameters namely temperature, pulp density and concentration glycine were optimized for maximizing leaching efficiency cathodic material. Response surface methodology (RSM) applied determining experimental conditions instead using traditional one factor at a time (O...

In this work, thealkaline roasting and sulfuric acid leaching processes were employed to extract vanadium from the magnetite ore of Saghand mine in central Iran. The response surface methodology based on the central composite design model was applied to optimize the parameters involved in the processes. The studied roasting parameters were temperature (900-1100 °C), sodium carbonate percentage ...