荧光偏振法测定苝与富勒酸的结合常数

建立了用荧光偏振法研究苝和富勒酸之间的相互作用的方法． 结果表明， 苝和富勒酸之间的相互作用强烈． 本方法的一个优点是不经分离既可测定荧光物的结合常数

Study on environmental fates of polynuclear aromatic hydrocarbons in contaminated coastal sediment

本文在现场情况下 ,研究了自然条件下受污染海岸带沉积物中的 7种多环芳烃(PolynuclearAromaticHydrocarbons ,简称PAHs)的解吸动力学行为 .结果表明 ,7种PAHs的解吸动力学行为可以用二元模型描述 .文中并将所得数据与文献报道的数据进行了比较 .The desorption behaviours of seven polynuclear aromatic hydrocarbons (PAHs) in contaminated coastal sediment have been studied under field. Total sedimentary concentrations of acenaphthene, benzo(a)anthracene, benzo(k)fluoranthene, benzo(a)pyrene, chrysene, fluoranthene and naphthalene were followed after the contaminated sediment samples had been translocated to a pristine coastal environment. The desorption kinetics of these PAHs were found to be describable by a two compartment model. The field desorption data were compared to other laboratory based sorption desorption kinetic data in the literature and were found to be in accordance with results obtained via mesocosm approach involving direct extraction of desorbed PAHs from the aqueous phase. However, when compared to results generated by conventional gas stripping desorption technique, the field desorption rates were at least an order of magnitude smaller.国家自然科学基金!资助项目 (2 99770 16 ) ;; 福建省自然科学基金!资助项目 (D9910 0 0 8) ;; 教育部重点项目!(99180 ) ;; 香港城市