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Small-angle X-ray scattering measurements for expanded fluid Se were carried out up to the semiconductor-metal transition region at high temperature and high pressure. A broad peak appears in the small-angle X-ray scattering profiles in the temperature range 1273 to 1773 K at 60 MPa, which suggests a correlation length of 50 Å . We fitted the patterns using a model function proposed by

For the adsorption of multiple organic compounds using activated carbon in aqueous systems, several useful models have been developed to describe the equilibrium relationship. One of the easy-to-use models was developed by Suzuki et al. and the model was extended to determine equilibrium parameters for each component simultaneously. The determination procedure required liquid mixtures at various initial concentrations. The industrial sample, however, is normally controlled at constant concentration and hence the determination procedure mentioned above was limited to be applied. In this study, simultaneous determination procedure of multi-component isotherm parameters from single sample was discussed theoretically and experimentally. Then, it was found that Freundlichtype parameters for each component dissolved in water could be obtained from constant composition solutions based on Ideal Adsorbed Solution Theory.

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