Study On Adsorbing Characters Of Naphthalene By Ionic Liquids Impregnated Resin

Because of a lack of effective ways to deal with the toxic organic pollutant, which are refractory pollutants from industrial wastewater, these entered the water to directly threat to human health and other biological survival. Polycyclic aromatic hydrocarbons (PAHs) are controled as a priority water pollutants, which play a carcinogenic, teratogenic , mutagenic role, and biological refractory by US. EPA and China National Environmental Monitoring Centre. PAHs are different concentration, Since PAHs come from refinery gas rectification plant, Coking Factory, high temperature incinerator, dyeing and printing wastewater, lime industry and many other industries. Environmental scientists study the environmental behavior of PAHs, toxicological and pollution control and have launched studies, and achieved certain results, all over the world. However, because of PAHs compounds with themselves characteristics, normal physical and chemical treatment are difficult to effectively remove completely from the pollution water. Additionally, the application of biochemical treatment purifies PAHs pollutants of water still in the exploratory stage. Therefore, to explore new ways of dealing with PAHs of wastewater are still of great value.Indoor temperature ionic liquids refer to a liquid state salt material near the temperatre, and often consist of Organic cation and inorganic anion, also known as RTMS. Ionic liquids prominent advantages are: the range of liquid temperature can reach a few hundred degrees with high stability, almost no vaporpressure, it won't pollute the environment by evaporation. It has well dissolved performance and could be recycled for many organic compounds, inorganic compounds. As a result of these unique nature, ionic liquids is expected to replace the traditional volatile organic solvent extraction to process for the industry, also it has a certain value in environmental governance.Taking into account the ionic liquids higher production costs, we should lower the loss of the use of the process .In this paperionic liquid will be fixed and will be combined with the resin used in a new type of adsorption materials - ionic liquids impregnated resin. Impregnating resin adsorption is the extraction of macroporous polymer carriers (polar and non-polar vector) to prepare to use of the extraction, desorption. It has both particles and liquid characteristics. Impregnating resin technology will combine solvent extraction with ion exchange adsorption of the two technologies .The similar technology apply to a column operation, it is higher than solvent extraction separation selectivity, equivalently to many times extraction, so separated efficiency is much higher than solvent extraction. The technology can continue to draw on solvent extraction and ion exchange in the field of latest achievements in the development of a new separation process. In order to better understand the effect of ionic liquids impregnated resin adsorption of PAHs naphthalene effect through static experiments in the laboratory. We studied the naphthalene to soak on the resin adsorption dynamics and the adsorption thermodynamics characteristics, and general adsorbent for naphthalene Adsorption characteristics of the comparision. We test the effects of temperature, pH, salinity and other factors on the process of ionic liquids impregnation resin adsorption, and decide the optimum conditions, explore the dissolution characteristics of ionic liquids in resin impregnated.Through this experimental study, we come to the following conclusions:1 Adsorption rate of artificial zeolite, activated alumina, activated carbon, AB-8 resin ,2:1impregnated resin, 5:1 impregnating resins, 10:1 and 20:1 impregnated resin for naphthalene is basically in line with classes formula of Bangham (R2> 0.9); By Kf of Bangham adsorption rate parameters, we can be judged adsorption velocity order: AB-8 resin>10:1 impregnating resin>20:1 impregnating resin>5:1 impregnating resin>2:1 impregnation tree> activated carbon> activated alumina > artificial zeolite. Adsorption rate is different, after 8h, all the adsorption processes have achieved a state of equilibrium, so static equilibrium is 8h time.2 The adsorption of artificial zeolite, activated alumina, activated carbon, AB-8 resin, 2:1 impregnated resin, 5:1 impregnated resin, 10:1 and 20:1 impregnated resin are very good and in line with Langmuir adsorption isotherm to adsorpt naphthalene; the adsorption capacity of Zeolite, activated alumina, activated carbon, AB-8 resin, 10:1 and 20:1 impregnated resin for naphthalene were 2.37,6.48,11.61,15.46,31.15,31.35 mg/g, the impregnated resin adsorption capacity to naphthalene are significantly larger than several other adsorption materials, impregnated resin of the content of the adsorption capacity has little influence in the ionic liquid. By the Kf of Freundlich sorption coefficient, we can judge the degree of adsorption capacity of the order: 10:1 impregnated resin> 20:1 impregnated resin> AB-8 resin> activated carbon> activated alumina> artificial zeolite.3 At different temperatures(15℃,20℃,25℃), pH(3,5,7,9), salinity(NaCl,KCl,CaCl2,Na2SO4)conditions, 10:1 impregnated resins adsorption for naphthalene are very good with Langmuir adsorption isotherm. The single factor Cycle Experiment shows: lower the temperature, lower pH value or increased salinity can reduce the dissolution from 10:1 impregnated resin process in the use of ionic liquids, lowered pH value or increase salinity can increase saturation adsorption capacity in 10:1 impregnated resin of naphthalene.4 By orthogonal experiment we determined that 10:1 impregnated resin adsorption of naphthalene is in the best conditions: T=30℃, pH=3, CNaCl=2000mg/L, the saturation adsorption is the largest, 66.67mg/g, respectively. The largest poor PH value R, 19.14, is the key factor to impact of the experimental results, followed by the concentration of NaCl, The minimum effect factor on the absorption is temperature.5 In the ionic liquid , naphthalene little affected dissolution of in 10:1 impregnated resin ,when the naphthalene concentration increased from 0 to 22.71 mg/L, adsorption the concentration of ionic liquid increased by about 2mg/L after impregnated resin, The result is that 10:1 impregnated resin can be used to deal with the waste water containing high concentrations of naphthalene. This experiment has opened a new researching Channel, and obtained new adsorbent - impregnated resin to remove the naphthalene from wastewater. At the same time, it will be determined to use in the effectiveness and feasibility of environmental governance in ionic liquids. It will provide a valuable experimental basis to further expand ionic liquids in the application of the environment.