期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 247, 期 -, 页码 263-268出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2019.06.068
关键词
UiO-66-NH2; Arsenate; Adsorption; Acid treatment; Capacity
资金
- Ministry of Science and Technology (MOST), Taiwan [108-2218-E-011-005]
The metal-organic framework (MOF) UiO-66-NH2 was synthesized with different substrate to solvent ratios and its morphology, surface area, pore distributions, and NMR, XRD, and TGA-FTIR patterns were obtained. Adsorption tests at pH 7 and 25 degrees C showed that the produced UiO-66-NH2 has a hydrogen arsenate adsorption capacity of 76.9 mg/g. With the affinity onto Zr clusters, this MOF also can adsorb phosphate ions from water. Treatment with 1-4 M hydrochloric acid (HCI) protonated the amine groups in the MOF. Treatment with 1 M HCl at 25 degrees C for 6 h maximized the adsorption capacity of UiO-66-NH2 to 161.3 mg/g, such that the protonated amine groups accounted for 53.7% of the adsorption of arsenate from the water. The use of excessively strong acid at elevated temperature reduced the adsorption capacity.
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