Title
|
|
|
|
Removal of arsenic and mercury species from water by covalent triazine framework encapsulated nanoparticles
| |
Author
|
|
|
|
| |
Abstract
|
|
|
|
The covalent triazine framework, CTF-1, served as host material for the in situ synthesis of Fe2O3 nanoparticles. The composite material consisted of 20 +/- 2 m% iron, mainly in gamma-Fe2O3 phase. The resulting gamma-Fe2O3@CTF-1 was examined for the adsorption of As-III, As-V and H-II from synthetic solutions and real surface-, ground- and wastewater. The material shows excellent removal efficiencies, independent from the presence of Ca2+, Mg2+ or natural organic matter and only limited dependency on the presence of phosphate ions. Its adsorption capacity towards arsenite (198.0 mg g(-1)), arsenate (102.3 mg g(-1)) and divalent mercury (165.8 mg g(-1)) belongs amongst the best-known adsorbents, including many other iron-based materials. Regeneration of the adsorbent can be achieved for use over multiple cycles without a decrease in performance by elution at 70 degrees C with 0.1 M NaOH, followed by a stirring step in a 5 m% H2O2 solution for As or 0.1 M thiourea and 0.001 M HCl for Hg. In highly contaminated water (100 mu gL(-1)), the adsorbent polishes the water quality to well below the current WHO limits. |
| |
Language
|
|
|
|
English
| |
Source (journal)
|
|
|
|
Journal of hazardous materials. - Amsterdam
| |
Publication
|
|
|
|
Amsterdam
:
2018
| |
ISSN
|
|
|
|
0304-3894
| |
DOI
|
|
|
|
10.1016/J.JHAZMAT.2018.04.027
| |
Volume/pages
|
|
|
|
353
(2018)
, p. 312-319
| |
ISI
|
|
|
|
000438002800035
| |
Pubmed ID
|
|
|
|
29679891
| |
Full text (Publisher's DOI)
|
|
|
|
| |
Full text (open access)
|
|
|
|
| |
Full text (publisher's version - intranet only)
|
|
|
|
| |
|