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Organic / Inorganic Composite Weak Base Anion Exchange Resin Synthesis And Application Of Research

Posted on:2011-02-05Degree:MasterType:Thesis
Country:ChinaCandidate:F G LiFull Text:PDF
GTID:2191330332973081Subject:Polymer Chemistry and Physics
Abstract/Summary:PDF Full Text Request
A large amount of wastewater characterized by high concentration of organic substances is discharged as the production ofβ-naphthalenesulfonic acid, which is an important intermediate in the production of fluorescent whitening agents, direct dyes, and fungicides. The ion exchange technology has shown great selectivity and easy manipulation in the separation process.The macroporous weakly anion exchang resin are composited hydrated ferric oxide by a way of chemical precipitation and represented the characteristic of that loaden hydrated ferric oxide on.With themβ-naphthalenesulfonic acid mixture wastewater are treated and studied systematicly.Lauching a variety of different factors (3-naphthalenesulfonic acid are adsorbed and exchanged by the resin(HFO-D301R) loaden hydrated ferric oxide,and are investigated thermodynamics and time, temperature, pH and salt content that impacted of them. The experimental results showed that the equilibium time of composite ion-exhanger absorbed P-naphthalenesulfonic acid wastwater is about 5h.The absorption and exchang process is exomthermic, and if the temperature of the process is higher the absorption and exchange capacity is low.So a lower temperarure is conducive to the conduct of exchanger. "pH=4" is positive for the adsorption. Salinity major impacted of the process that a mass of ions(Clˉ,SO42-,SO32-) in the wastewater are competitive.In addition to the static factors, the dynamic factors on adsorption exchange is researched. Velocity is lower, the better results, as the increase of the velocities penetrating time is ahead, and the shape of the penetrating curve is flattened, fully penetrating time is extended. When you double the containing concentrations, penetrating time bring forward significantly. And in the flow velocity to 2BV/h aβ-naphthalene sulfonate mixed acid waste water penetrating curve is worked.Theβ-naphthalenesulfonic acid was chosen to study the behavior of the resin adsorption and exchange process. Freundlich isotherm was best to simulate the adsorption among the isotherm models of Langmuir and Freundlich. A first-order adsorption kinetics equation was developed for the process, and relevant parameters were calculated. Furthermore, results showed that the process was controlled by the particle diffusion, i.e. PDC.
Keywords/Search Tags:Macroporous weakly basic anion exchange resin, Hydrated ferric oxide, Hydrate copper oxide, β-naphthalenesulfonic acid, Breakthrough curve
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