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- Title
Adsorption of Heavy Metal Ions from Aqueous Solutions by Bentonite Nanocomposites.
- Authors
Jing Ma; Guojun Su; Xueping Zhang; Wen Huang
- Abstract
A series of bentonite nanocomposites have been synthesized by modifying bentonite with hexadecyltrimethylammonium bromide (CTMAB) and the common complexing agents, complexone (ethylene diamine tetraacetic acid, EDTA) or mercaptocomplexant (2-Mercaptobenzothiazole, MBT). These adsorbents are used to remove heavy metal ions (Cu2+, Zn2+, Mn2+,Co2+). The Bent-CTMAB-MBT adsorbed metal ions are higher than Bent-CTMAB-EDTA under the same ion concentration in AAS. Compared with the single ion system, he adsorption of the mixed ion system of Cu2+, Zn2+, Mn2+, Co2+ had decreased differently. In the mixed system, the adsorption of Mn2+ is significantly lower, but the adsorption of Cu2+ was highest. The adsorption sequence of these four metal ions was Cu2+ > Zn2+ > Co2+ > Mn2+, and the selective adsorption was closely related to the hydration energy of heavy metal ions. We could remove more metal ions in different stages with the adsorption sequence.
- Subjects
METAL ion absorption &; adsorption; BENTONITE; HEAVY metal absorption &; adsorption; NANOCOMPOSITE materials; SORBENTS
- Publication
Water Environment Research (10614303), 2016, Vol 88, Issue 8, p741
- ISSN
1061-4303
- Publication type
Article
- DOI
10.2175/106143016X14609975747081