| The coal chemical wastewater is a kind of organic wastewater with high concentration and hard to be degraded which produce in the coal chemical companies production process.Generally,it needs pretreatment,biochemical treatment and advanced treatment before it can reach emission or reuse standards.In the wastewater treatment process,there is no convenient and effective method for the detection and analysis of pollutants,especially PAHs.And in the advanced processing stage,there are still many problems that need to be solved urgently.In this paper,a series of experimental studies have been conducted on the above issues.In this paper,firstly we established a soild phase extraction-high performance liquid chromatography for the qualitative and quantitative analysis of PAHs in wastewater.The pretreatment and chromatographic conditions were also determined.And the 16 kinds of PAHs can be effectively enriched and separated for detection.The result shown that all of the 16 kinds of PAHs were detected,and the total amount reached 4.635?g/L.And the adsorption of polycyclic aromatic hydrocarbons by NDA-150 resin was the best among the four adsorbents.After adsorption of water into the resin,the total amount of16 kinds of PAHs in the water dropped to 0.892?g/L,which could meet the emission standards.In this paper,several resins were screened and determine the NDA-150 resin suitable for wastewater treatment.And the adsorption conditions were optimized,as follows:the dosage of NDA-150 resin is 1.8 g/100 ml?wet resin?,the original pH is maintained,the adsorption temperature is 298 K and the adsorption time is 10 h.After adsorption treatment,the removal rate of COD,chroma,ammonia nitrogen and volatile phenol were reached to 83.4%,70.1%,69.7%and 73.6%,respectively.And,he resin was regenerated with methanol solution at 313 K for 18 h,the regeneration rate could reach 90%.Finally,we usd A-phenolic and tri-block copolymers F127 prepared the ordered mesoporous carbon materials by the method of evaporation-induced self assembly.And the nitrogen adsorption-desorption experiments,XRD,TEM,Raman spectroscopy and XPS were used to measurements and analyze the materials.The result shown that the OMC which carbonized at 650°C exhibit ordered 2D hexagonal mesoporous structures with high degree of graphitization,high surface area(590.6 m2·g-1),appropriate pore size?mean diameter about 10 nm?and large mesoporous pore volume(0.512 cm3·g-1).The prepared OMCs show excellent adsorption properties for phenol effluent with removal efficiency of phenols of up to 92.3%.The adsorption experiment data demonstrate that the adsorption is multi-molecular layer adsorption.Meanwhile,the study of adsorption thermodynamics indicates that the adsorption process is a spontaneous,exothermic physical adsorption process.After the multi-stage adsorption of the actual wastewater by the OMC,the phenol content is lower than 0.5 mg/L which meet the emission standards.After thermal regeneration under 400°C for 5 h,the regeneration efficiency exceeded 90%. |
PDF Full Text Request