| More attention has been paid to environmental protection issues and water quality with the extensive environmental pollution, especially the shortage and pollution of water resource. Polycyclic aromatic hydrocarbons (PAHs) are an important type of persistent organic pollutants, and widely distributed in the environment. They not only induce skin cancer but also lung cancer. This thesis analyzes the pollution situation of PAHs, and the benzo[a]pyrene are analyzed in this thesis, and the adsorption method is used to deal with naphthalene in water.Solid-phase microextraction (SPME) is a novel solvent-free extraction technique that integrates extraction, concentration and sample introduction in a single step. It is simple, convenient, rapid and highly sensitive. Therefore, SPME has been successfully applied to preconcentration and determination of various analytes from different foods and samples involved environmental, biological and pharmaceutical coupled to gas chromatography (GC), high performance liquid chromatography (HPLC) or capillary electrophoresis (CE). The fiber coating is its active site contacting analytes of interest. The property of the coating determines the extraction capacity, sensitivity, selectivity and the results of analysis. For these reasons, the hot issues of SPME technology are currently concentrated on the investigation of novel fiber coatings to improve the extraction efficiency and extend the applications of SPME. With the development of these novel coatings, the SPME technique has a wide application in extraction and separation.Since the first report on the synthesis of the novel M41S silica mesoporous materials (particularly MCM-41) by Mobil researchers in1992, much attention has been paid to these materials. Subsequently, variously mesoporous materials had been successfully synthesized such as SBA-15, MSU and PMOs. For these reasons, a study on mesoporous materials has become one of frontier fields in chemistry, physics and materials science. Thus, as a novel inorganic or inorganic/organic functional material, the materials have potential applications in the many fields. In this thesis, a novel method was developed using an etched stainless steel wire as a fiber of SPME coupled with HPLC. Then, we prepared a series of organo-functionlized mesoporous silicas of MCM-41via a post-grafting methed. Functionalized mesoporous materials have been widely used as sorbents.The thesis consists of four parts:In Chapter1, the theory of PAHs and SPME are introduced briefly. The advances in SPME technique and the development of fiber coatings are reviewed. The synthesis, characterization and applications of mesoporous materials are summarized.In Chapter2, a novel method was developed for the determination of trace B[a]p in environmental water samples using an etched stainless steel wire as a fiber of SPME coupled with HPLC in this thesis. Several important parameters influencing the extraction efficiency of B[a]p were optimized. The proposed method is simple, efficient and sensitive was suitable for the determination of trace B[a]p in environmental water samples.In Chapter3, MCM-41has been successfully synthesized use CTAB as templates under a certain temperature, organ-functionlized groups are prepared by post-grafiting method, using trimethylchorosilane as silylation reagents. The samples were characterized by fourier transform infrared (FT-IR), small-angle x-ray diffractometer (SAXRD), transmission electron microscope (TEM), scanning electron micrography (SEM), thermogravimetry analysis (TGA) and N2adsorption-desorption.In Chapter4, M-MCM-41was used as adsorbents. At the same time, the effects of temperature, contact time and initial concentration on adsorption naphthalene were investigated. |
