Studies Of The Adsorption Organic Pollutant (phenol)in Sewage By Modified Diatomite

In this dissertation, modified diatomite as sewage disposal agent for adsorbing organic pollutant (phenol) was studied, discussing adsorbing parameters and mechanism, which affect the adsorbing process. These parameters mainly included the diatomite morphology, the modifying agent type and dosage, coagulant dosage and solution pH etc. Experiment results show the following regular patterns. cFor better adsorbing efficacy it is beneficial for the diatomite to be plate form, high porosity and integrity. he adsorbing efficiency of the modified diatomite is better than the unmodified.甌he adsorbing efficacy of the diatomite modified by composite modifier (CTMAB ? cetyltrmethylammonium bromide and TMABetramethylammonium bromide) is better than the diatomite modified by single one.long with the increment of modifier, the adsorbed dosage of phenol increases too.~Coagulant is beneficial for the diatomite adsorbing efficacy.甌he optimum pH for the diatomite adsorbing ability is 7?. By relying on the test methods of spectrophotometer, scanning electron microscope, infrared spectroscopy and Xay diffraction analysis, the adsorbing type, mechanism and factors with effect the adsorbing dosage under the optimum technical parameter were studied. The diatomite adsorb mechanism include physical absorption and chemical adsorption. The former one include Debye force and London force, and include coagulant effect and depth filtration between molecules as well. In this dissertation ,the author recommend using inorganicrganic modifier to modify diatomite as sewage disposal agent for adsorbing phenol, experiment results show that the adsorbs ratio of the phenol is 72.5%. In brief, this dissertation provide an indeed method for disposing the organic pollutant in sewage.