The Study On Photolysis Of Chlorobenzenes In The Mine Environment Dissolved In Gemini Surfactants

Chlorobenzene compounds (CBs for short) belong to the aromatic chloride, and a class of persistent organic pollutants (Pops).CBs and derivatives in general can be used as chemical dyes, organic synthesis intermediates and organic solvents。Thus, in medicine, leather, electronics and other fields have a very wide application。It is reported that up to274,000tons monochlorobenzene was Produced by United States In1960.sLater, a large number of scholars, find that the chlorobenzenes pollutants make environment has been severely damaged, and even harmful to human health, many countries has been included as an environmental priority controlling detection pollutants. Even so, because chlorobenzenes pollutants are persistent and nondegradable,it can be detected in the place of the river and mining soil. More and more attention has been paid to finding a fast and efficient degradation of chlorobenzene contaminants.Gemini surfactants, a new class of surfactants, also known as the dimerization surfactants or twin-chain surfactants and so on, is similar with traditional surfactant in structure. There are also different.It is linked with two identical or similar to conventional surfactants by a spacer group in a hydrophilic head by chemical bonds. Therefore, it inherited the tradition of the fine nature of the surfactant. Because of its unique structure, its various aspects of performance far exceed the traditional surfactants. It Is also widely used in real life. It can be used as emulsifiers, solubilizer, disinfectants, controlling sewage and soil, tertiary oil recovery and so on.Based on a comprehensive understanding of domestic and foreign photodegradation, this paper studied CBs, in the Gemini surfactant solution of photodegradation reactionBy observing the degradation effects of chlorobenzene in different types of solution and analysis on the strengthening effect of Photodegradation in different chain lengths, different groups of Gemini surfactants, a variety of the Gemini surfactant solution were compared, two sets of experiments was chosen to comprise, a group is a degradation in the traditional surfactant solution, the other group placed in the dark. According to the experimental results, the reaction principle can be analyzed.In this study, the critical micelle concentration (CMC) of three kinds of the gemini type and a traditional type surfactant were determined to provide a theoretical basis for the strengthening effect. The experimental method using the maximum bubble pressure method to measure the critical micelle concentration (CMC)。Determination results as:EDDAB<EDOAB <PDDAB<PDOAB<H-003。 Chlorobenzene compounds in the Gemini surfactant solution can be decomposed effectively by UV. These experiments use the gas chromatography to detect the concentration of remaining CBs in each time period, analysis of its photodegradation. The following conclusions:1.The concentration of1,2,4-trichlorobenzene and1,2,4,5-tetrachloro-benzene in the residues of photodegradation of H-003solution is the highest, This shows that photodegradation in the Gemini surfactant solution compared with the traditional phase, is higher in the degradation rate and is more obvious in the effect of strengthening.2. The degradation rate of1,2,4-trichlorobenzene and1,2,4,5tetrachlorobenzene in EDDAB solution is lower than in DODMAB solution, which shows the performance impact of chain length on the the Gemini surfactant, thus affecting its role in the photodegradation reaction, and the performance of gemini surfactants.so the chain length might exist the optimal value.3. Compare of1,2,4-trichlorobenzene and dodecydimethy ammonium bronides1,2,4,5-tetrachlorobenzene in EDDAB solutions with C support base pairs solutions DODMAB in the degradation, the effect is insignificant, the specific process needs further experimental analysis.