Speciation and Ammonia-Induced Precipitation of Neptunium and Uranium Ions.

The pH evolution and corresponding changes in the UV-Vis-NIR absorption spectra of oxygenated neptunium (NpO and NpO) and uranyl ions (UO) in nitric acid are investigated during titration with an aqueous NH solution. The speciation and precipitation regimes between acidic (pH 1.5) and alkaline (pH 10) conditions at room temperature are discussed to assess the suitability of Np(V) or Np(VI) in sol-gel conversion processes for fuel target fabrication.

Adsorption of dyes by ACs prepared from waste tyre reinforcing fibre. Effect of texture, surface chemistry and pH.

This paper compares the importance of the texture and surface chemistry of waste tyre activated carbons in the adsorption of commercial dyes. The adsorption of two commercial dyes, Basic Astrazon Yellow 7GLL and Reactive Rifafix Red 3BN on activated carbons made up of reinforcing fibres from tyre waste and low-rank bituminous coal was studied. The surface chemistry of activated carbons was modified by means of HCl-HNO3 treatment in order to increase the number of functional groups.

Creating the cannabis user: a post-structuralist analysis of the re-classification of cannabis in the United Kingdom (2004-2005).

In January 2004 the British government announced that cannabis would be reclassified from Classes B to C, taking into account its level of harmfulness for human health and considering the penalties for possession and supplying. It was argued by the Government, that cannabis reclassification would save some resources and stop the criminalisation of otherwise law-abiding citizens. One year later, in 2005 the discussion about cannabis reclassification shifted from the argument about efficiency in the use of resources toward a debate about the effects of cannabis on mental health.