This paper presents an experimental study on the dissolution kinetics and solvent extraction of total gold from Ijero-ekiti (Nigeria) gold ore deposit by hydrochloric acid leaching followed by extraction with Tributylphosphate (TBP) in kerosene. The leaching investigation showed that the gold ore dissolution in HCl solution increases with increasing acid concentration, temperature and with decr...

Determination of potential contaminants elements in food packing films arising from contact with acidic aqueous foods was undertaken by inductively coupled plasma optical emission spectrometry (ICP OES) in accordance with DIN EN 1186-1. Test sections from plastic films were totally immersed in 3% w/v CH3COOH used as the food simulant. Testing was conducted under three conditions: (1) 10 days at...

Animal manures are suspected to be a major source of nitrate leaching due their low nitrogen use efficiency (NUE) by crops. However, actual measurements from animal manure under field conditions scarce. In an on-farm trial in Switzerland over 2.5 years, we used 15 N labelling trace the fate cattle slurry soil-plant system and test whether more was leached than mineral fertiliser. The experiment...