TY  - Data
T1  - Data set of selective adsorption sites and selection mechanism of tannic acid adsorbent for lead (II) (March 2018)
A1  - Yang Liming
DO  - 10.12072/ncdc.UTCMW.db2127.2022
PY  - 2022
DA  - 2022-05-30
PB  - National Cryosphere Desert Data Center
AB  - Rational design and directional synthesis of adsorbents with excellent selectivity are challenging and of great significance for the remediation of heavy metal contaminated wastewater. A new tannic acid (TA) - based adsorbent was synthesized by simple coordination reaction（ TA@Zr ）. Adsorption isotherm experiment shows that TA@Zr It has high adsorption capacity for pb2+. What is impressive is that, TA@Zr Very high selectivity coefficients (40-170) can be achieved. With the decrease of Zr precursor, TA@Zr The selectivity of Zr species remains unchanged, indicating that Zr species TA@Zr The selectivity of is very small. Even if Zr species are completely replaced by Ti precursor, the resulting adsorbent still has significant selectivity. These results show that Ta TA@Zr The selectivity has a great contribution to Zr species rather than Zr species. Further, based on the results of XPS, DFT and batch adsorption experiments, it can be inferred that TA acts as the hydrogen atom coordinated with pb2+ in the main phenol hydroxyl adsorption site, while the hydroxyl group is replaced and releases hydrogen ions, thus expanding the proton exchange mechanism for selective adsorption of pb2+ ions.The data set of selective adsorption sites and selection mechanism for lead (II) adsorption by tannic acid adsorbent is obtained by experimental methods and formula reasoning. The data format is decimal (.Xls). The data volume is 4 groups, a total of 21 experiments, and a total of 243 experimental data.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/848137d4-fbfa-4320-bdb5-233c7ab80355
ER  -