Description
This powerpoint presentation begins by providing bulleted points of the presentation’s content that includes the following: NO<sub>3</sub><sup>-</sup>, ClO<sub>4</sub><sup>-</sup>, HAsO<sub>4</sub><sup>2-</sup> easily removed bychloride IX w SBA;separate target ion from background ions,then regenerate/replace resin;IX run length, peaking, and regenerabilitydepend on affinity, K<sub>ij</sub> or ? <sub>ij</sub>, of ion forresin;matrices: Sty-DVB and Polyacrylic-DVB;functional groups: quaternary ammoniumTrimethyl, dimethylethanol (std. resins)Triethyl, tripropyl, tributyl (selective resins); less-preferred ions peak: C<sub>i,Eff</sub> > C<sub>i,In</sub>;peaking eliminated with selective resins;divalent selectivity: HCO<sub>3</sub><sup>-</sup> * CO<sub>3</sub>2<sup>-</sup> + H<sup>+</sup>;highly preferred ions<sup>1-</sup> hard to regenerate; and,natural selectivity reversal in for ions<sup>y</sup>, easy regenerationand direct reuse of spent regenerant. Presentation conclusions indicate that: affinity of ions for resins, K<sub>ij</sub>,?<sub>ij</sub>, determine runlength, peaking, and regenerability; all but most preferred contaminants are subject topeaking; NO<sub>3</sub><sup>-</sup>, ClO<sub>4</sub><sup>-</sup> peaking eliminated -increase charge separation distance, andincrease hydrophobic nature;divalent preference promotes deprotonation ofpolyprotic anions and pH waves in anion columns; for divalent/monovalent–HAsO<sub>4</sub><sup>2-</sup>/Cl<sup>-</sup>–exchange, selectivity reversal occurs anddirect reuse of brine is possible withoutremoving the arsenic; in absence of selectivity reversal, removal ofcontaminant–NO<sub>3</sub> <sup>-</sup>, ClO<sub>4</sub><sup>-</sup>–from brinebefore reuse is necessary. Includes table, figure.
Product Details
- Edition:
- Vol. – No.
- Published:
- 11/01/2009
- Number of Pages:
- 27
- File Size:
- 1 file , 1.2 MB
- Note:
- This product is unavailable in Ukraine, Russia, Belarus
