Abstract Aggregation numbers were calculated based on measurements of the self-diffusion coefficients, effective hydrodynamic radii micelles and aggregates oxyethylated alkylphenols in aqueous solutions. On assumption that spherical are equal to lengths fully extended neonol molecules, limiting values aggregation corresponding spherically shaped calculated. The concentration temperature ranges ...

4-tert-Octylphenol (OP) is major degradations products of alkylphenol ethoxylates. These chemicals are found in the waste water and sludge of sewage treatment works and river sediments. Alkylphenols are also found in drinking water. Thus, alkylphenols are widely dispersed in the environment. Several alkylphenols, including 4tert-octylphenol have included altered sex hormone levels and hypothala...

We studied selected tissues from ewes and their lambs that were grazing pastures fertilized with either sewage sludge (treated) or inorganic fertilizer (control) and determined concentrations of alkylphenols and phthalates in these tissues. Mean tissue concentrations of alkylphenols were relatively low (< 10-400 microg/kg) in all animals and tissues. Phthalates were detected in tissues of both ...

Fast pyrolysis is an efficient technology to convert lignocellulosic biomass a liquid product. However, the high contents of oxygenated compounds and water hinder direct utilization oils. Here, we report upgrading concept obtain products with improved product properties enriched in valuable low molecular weight chemicals particularly alkylphenols. It entails two steps, viz. i) in-situ staged co...

OBJECTIVES To examine nonylphenol (NP) and 4-t-octylphenol (OP) concentrations and general water quality indicators along a river in the greater Tokyo area and to specify the distribution and origin of alkylphenols. METHODS Water was sampled from the Edogawa River, a main river in the greater Tokyo area, which is a source of public drinking water; and the Sakagawa River system, a tributary of...