Abstract
Tetraethylenepentamine chelating fiber (TEPACF) was studied in the adsorption performance of indium. It was determined that the optimal pH range of adsorption was in 2.00~6.00, and the exchange capacity of acid was 2.70mmol/g. The results of adsorption selection studies on TEPACF adsorption In(Ⅲ) from mixed solution revealed that, Within the pH value of 2.50~3.00, the best static adsorption capacity of In(Ⅲ), Fe(Ⅲ), Fe(Ⅱ) and Zn(Ⅱ) onto TEPACF were 0.50mmol/g, 0.59mmol/g, 0.22mmol/g and 0.19mmol/g, respectively. In(Ⅲ) can be selectively separated from the mixed solution, with enrichment multiples of 12. After adsorption of In(Ⅲ), TEPACF was carried out in FT-IR, SEM and EDX test. According to infrared spectra of the chelating fiber after adsorption, the peak in 1107cm-1 and 617cm-1 showed N atoms and metal ions formed the coordination bond. In the SEM images, it could be visually observed that fiber surface was covered with small white particles, and mainly in the fiber surface. Combination with EDX test results, the white particles was in connection with the chelate of fibers adsorption of metal ions. The test results showed that the characteristics of TEPACF adsorption In(Ⅲ) accorded with the chemical adsorption characteristics. It was speculated that the adsorption process should be chemical adsorption mechanism of cyclic chelate. The research of TEPACF provides new train of thought to solve the problem of indium in enrichment and separation.
| Translated title of the contribution | Study on the Adsorptive Selectivity and Mechanism of Indium on Tetraethylenepentamine Chelating Fiber |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 461-470 |
| Number of pages | 10 |
| Journal | Lizi Jiaohuan Yu Xifu/Ion Exchange and Adsorption |
| Volume | 35 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 20 Oct 2019 |