Journal
CHEMICAL ENGINEERING JOURNAL
Volume 260, Issue -, Pages 809-817Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.09.059
Keywords
ZnAl layered double hydroxides; Pyromellitic acid; Phosphate; Selective adsorption; Hydrogen bond
Categories
Funding
- National Basic Research Program of China [2013CB733505]
- National Natural Science Foundation of China [41271260, 41276101]
- Program for New Century Excellent Talents in University [NCET-12-0326]
- Development and Reform Commission of Fujian Province, China [2011-1598]
- Science and Technology Program of Xiamen of Fujian Province, China [3502Z20126005]
Ask authors/readers for more resources
Selective adsorption of phosphate from a complex solution is the key step for phosphate recovery from industrial wastewater. Despite recent research progress, phosphate removal with high selectivity has been found challenging, largely due to the complicated dynamic adsorption behavior of other competing anions in the aqueous waste solution. In the present study, pyromellitic acid (PMA) intercalated layered double hydroxides ([Zn0.68Al0.33(OH)(2)](PMA)(0.08).0.3H(2)O, denoted as Zn2Al-PMA-LDHs) were synthesized and shown to possess a high selectivity (97.41% at pH 7.0) towards phosphate in a hybrid solution containing H2PO4-, SO42-, CO32-, NO3- and Cl-. In addition, benzoic acid (BA), terephthalic acid (TA) and trimesic acid (TMA) intercalated LDHs also showed similar adsorption performance. The hydrogen bond between hydroxyl group of phosphate as the donor and oxygen of dissociated aromatic carboxyl group as the acceptor was found to play a key role in phosphate adsorption, as suggested by FT-IR and XPS analysis. This work not only presented a well performed material but also a useful method for better design of efficient LDHs for selective phosphate adsorption. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available