SCN^- from desulphurization waste solution of cocking plant was separated by D241 anion exchange resin. When SCN＂ concentration of the waste liquid is O.116mg/ml, its dynamic exchange capability is 93.61mg/g resin. T...SCN^- from desulphurization waste solution of cocking plant was separated by D241 anion exchange resin. When SCN＂ concentration of the waste liquid is O.116mg/ml, its dynamic exchange capability is 93.61mg/g resin. The condition of use KOH as eluted solution to elute SCN^- is KOH concentration 0.5mol/L, flow velocity 60mi/h, with 60ml eluted solution can completely elute SCN＂ which exchanged from waste solution. Vaporized the eluted solution, obtain the KSCN crystal in which the concentration of SCN^- is 53.34%, converts to KSCN is 89.2%. SCN^- crystal was separate out from Na2SO3/KOH mixed solution. The relationship between the proportion of Na2S2O3/KOH, free liquids in crystal and the saturation solution volume when crystal appear, the content of KSCN in crystal： the ratio of K2S2O3/KSCN show direct ratio with the saturation solution volume when the crystal birth, r^2=0.9964; when the ratio of K2S2O3/KSCN is between 0.15 and 0.25, the content of SCN^- in the crystals grow with K2S2O3 content increases, the content of free liquids in crystal also along with it increase; When the ratio of Na2S2O3/KOH is 0.15, the content of SCN^- is 54.56%; convert to KSCN is 76.2%. When the ratio of K2S2O3/ESCN is 0.25, the content of SCN^- is 65.28%; convert to KSCN is 91.2%. When the ratio of K2S2O3/KSCN exceeds 0.25, the content of SCN^- in the crystals and the content of free liquids in crystal reduce when the ratio of K2S2O3/KSCN increase.展开更多
A new di-function adsorbent (JN-3) was prepared by sulfhydryl modified. Comparing with Amberlite XAD-4 and NDA-150, the equilibrium adsorption for phenol on the JN-3 from aqueous solutions was tested, perfect adsorpti...A new di-function adsorbent (JN-3) was prepared by sulfhydryl modified. Comparing with Amberlite XAD-4 and NDA-150, the equilibrium adsorption for phenol on the JN-3 from aqueous solutions was tested, perfect adsorption capacity was shown. Pb2+ can be also removed by JN-3 because of the chelate interaction between sulfhydryl groups and metal ions. This adsorbent could be used in removal of combine pollutants such as phenolic compounds and heavy metal ions from waste streams.展开更多
Understanding the roles of asphaltene and resin as natural surfactants existed in crude oil can enlighten contradicting reported results regarding interfacial tension(IFT) of crude oil/aqueous solution as a function o...Understanding the roles of asphaltene and resin as natural surfactants existed in crude oil can enlighten contradicting reported results regarding interfacial tension(IFT) of crude oil/aqueous solution as a function of salinity and ion type. In this way, this study is aimed to investigate the effect of these natural surface active agents on IFT of with special focus on SO4^2-anion and Mg^2+cation. Two different synthetic oil solutions of 8 wt% of the extracted asphaltene and resin dissolved in toluene are prepared, and then IFT values are measured. After that,the obtained results are compared with the IFT of intact crude oil in contact with the same saline solutions examined in the previous stage. The obtained results showed a synergistic effect of Na2SO4+ MgCl2 solution unlike the MgSO4+ MgCl2 and CaSO4+ MgCl2 solutions on IFT reduction of resin at MgCl2 concentration of 15000 mg·kg^-1. In summary, it is found that the affinity of asphaltene molecules towards the interface of oleic phase/ionic solution leads to higher IFT variation.展开更多
文摘SCN^- from desulphurization waste solution of cocking plant was separated by D241 anion exchange resin. When SCN＂ concentration of the waste liquid is O.116mg/ml, its dynamic exchange capability is 93.61mg/g resin. The condition of use KOH as eluted solution to elute SCN^- is KOH concentration 0.5mol/L, flow velocity 60mi/h, with 60ml eluted solution can completely elute SCN＂ which exchanged from waste solution. Vaporized the eluted solution, obtain the KSCN crystal in which the concentration of SCN^- is 53.34%, converts to KSCN is 89.2%. SCN^- crystal was separate out from Na2SO3/KOH mixed solution. The relationship between the proportion of Na2S2O3/KOH, free liquids in crystal and the saturation solution volume when crystal appear, the content of KSCN in crystal： the ratio of K2S2O3/KSCN show direct ratio with the saturation solution volume when the crystal birth, r^2=0.9964; when the ratio of K2S2O3/KSCN is between 0.15 and 0.25, the content of SCN^- in the crystals grow with K2S2O3 content increases, the content of free liquids in crystal also along with it increase; When the ratio of Na2S2O3/KOH is 0.15, the content of SCN^- is 54.56%; convert to KSCN is 76.2%. When the ratio of K2S2O3/ESCN is 0.25, the content of SCN^- is 65.28%; convert to KSCN is 91.2%. When the ratio of K2S2O3/KSCN exceeds 0.25, the content of SCN^- in the crystals and the content of free liquids in crystal reduce when the ratio of K2S2O3/KSCN increase.
基金The National Natural Science Foundation of China (No.50778088).
文摘A new di-function adsorbent (JN-3) was prepared by sulfhydryl modified. Comparing with Amberlite XAD-4 and NDA-150, the equilibrium adsorption for phenol on the JN-3 from aqueous solutions was tested, perfect adsorption capacity was shown. Pb2+ can be also removed by JN-3 because of the chelate interaction between sulfhydryl groups and metal ions. This adsorbent could be used in removal of combine pollutants such as phenolic compounds and heavy metal ions from waste streams.
文摘Understanding the roles of asphaltene and resin as natural surfactants existed in crude oil can enlighten contradicting reported results regarding interfacial tension(IFT) of crude oil/aqueous solution as a function of salinity and ion type. In this way, this study is aimed to investigate the effect of these natural surface active agents on IFT of with special focus on SO4^2-anion and Mg^2+cation. Two different synthetic oil solutions of 8 wt% of the extracted asphaltene and resin dissolved in toluene are prepared, and then IFT values are measured. After that,the obtained results are compared with the IFT of intact crude oil in contact with the same saline solutions examined in the previous stage. The obtained results showed a synergistic effect of Na2SO4+ MgCl2 solution unlike the MgSO4+ MgCl2 and CaSO4+ MgCl2 solutions on IFT reduction of resin at MgCl2 concentration of 15000 mg·kg^-1. In summary, it is found that the affinity of asphaltene molecules towards the interface of oleic phase/ionic solution leads to higher IFT variation.
