Adsorption And Degradation Of Pollutants From Waters By Novel Polymer-Supported Metal Oxides And Their Applications

In this thesis, two types of novel metal oxides/polymer matrixcomposite materials, named HMO-201and ZrP-150, were fabricated byimpregnating hydrous manganese dioxide (HMO) onto a porouspolystyrene anion exchanger resin (D201) and loading zirconium oxideonto a macroporous adsorptive resin (NDA150) respectively through ionexchange, oxidation and reduction. The removal of sulfadiazine (SD) byHMO-201was evaluated as a function of solution pH, backgroundelectrolyte NaCl and dissolved organic matter (DOM). The adsorption ofcontaminated water contained phenol or Cd(II) or phenol and Cd(II) byZrP-150was also studied.The results of the removal experiment of SD by HMO-201indicatedthat the removal of0.01mmol/L SD reached99.9%at pH1.0within120minutes. The SD degradation followed the pseudo-first-order kinetics. SDremoval efficiency was little affected by ionic strength and DOM.HPLC-MS showed that the removal of SD by HMO-201was due todegradation rather than adsorption. With simulated SD wastewater containing NaCl and DOM, SD removal efficiency remained above99%within240minutes for up to ten batches of continuous operation.Fixed-bed column experiment results of HMO-201showed that SDremained undetected after2000-BV simulated SD wastewater was passedthrough the column. HMO-201was effective for removal of sulfonamideantibiotics commonly found in the environment. It could be reusedwithout a significant loss of capacity and thus has a great potential ofreal-world applications.The results of the adsorption experiment of contaminated watercontained phenol or Cd(II) or phenol and Cd(II) by ZrP-150showed thatthe adsorption of phenol and Cd(II) by ZrP-150was more favorable at thesolution pH5.0. The uptake of phenol by ZrP-150would decline and theadsorption of Cd(II) by ZrP-150would enhance while the contaminatedwater pH rose. The removal of Cd(II) by NDA150was Negligible,ZrP-150showed potential possibilities for deeply removing phenol andCd(II). Therefore, the adsorption of contamination at solution pH5.0andthe desorption of pollutant in strong acidic or alkaline conditions byZrP-150would be feasible. Fixed-bed column experiment results of theuptake of phenol and Cd(II) by ZrP-150showed that, compared toNDA150, ZrP-150exhibited more favorable adsorption of phenol andCd(II) from contaminated water and had tremendous possibilities.