Removal of Flouride From Aqueous Solution by Urea Formaldehyde Resin Loaded Ce⁴⁺

In this paper, a new adsorbent was synthesized by loading Ce⁴⁺ on the traditional urea formaldehyde resin for the removal of fluoride from aqueous solution. The factors affecting the experiment such as pH, temperature and coexisting anions were studied by static experiments. The results show that the maximum theoretical adsorption capacity are 40.2 mg/g at 25 ℃. It is well fitted by pseudo-second-order model and Langmuir equation can describe the adsorption capacity precisely. The mechanism of adsorptions is ion exchange. The characteristics of adsorption are identified by SEM, FTIR, XRD and isoelectric point test. Adsorbent can be regenerated by NaOH, the regeneration of the adsorbent still have a great fluoride removal performance. At the present study, the adsorption material can be an effective adsorbent for the treatment of fluoride waste water.