Hydrometallurgical recovery of zinc and lead from electric arc furnace dust using mononitrilotriacetate anion and hexahydrated ferric chloride.

The purpose of this work was to study the feasibility at laboratory-scale of a new hydrometallurgical process for treating electric arc furnace dusts (EAFD). The proposed process is intended to extract zinc and lead from EAFD without destroying the iron oxides matrix. So, this material can be recycled by the steel industry.

Atlanto-axial dislocation due to ossiculum terminale persistens. Report of two cases treated by a new technique of posterior fusion.

Two cases of atlanto-axial dislocation due to ossiculum terminale of the odontoid process are reported. A new technique of posterior fusion with a Y-shaped plate is described. Embryological data, clinical features, and operative treatment of this unusual condition are discussed.