This article designs and prepares a novel quaternary ammonium salt polymer (QAPs) with high adsorption sites (i.e., quaternized nitrogen confirmed by FT-IR) for rapid and selective removal of Cr (VI) from water. The EDS analysis results showed that the maximum exposure rate of nitrogen on the surface of QAPs was as high as 86.1%, almost twice that of Cr (VI) ion imprinted polymer (Cr (VI) - IIP) (46.2%). The idea of high exposure effect of adsorption sites proposed in this article can provide valuable guidance for designing rapid selective adsorbents to remove and recover Cr (VI) from wastewater.
The high exposure effect of adsorption sites significantly improves adsorption capacity and removal efficiency: taking the adsorption of hexavalent chromium by quaternary ammonium salt polymers (QAPs) as an example dataset, the data was obtained using experimental methods in decimal (. xls) format, with a data volume of 6 groups and a total of 38762 entries.
Indoor experiments, formula reasoning, independently generated.
Adopting adsorption desorption isotherms, stage linear fitting of particle diffusion model, and spectral characterization of pure potassium dichromate after adsorption. The maximum adsorption capacity (211.8 mg/g) and initial adsorption rate (h 0, 66.6 mg/(g · min)) of QAPs (i.e. 5:1 (TRIM)) for Cr (VI) are 3.6 and 4.9 times higher than those of Cr (VI) - IIP (63.0 mg/g and 13.5 mg/(g · min), respectively. Flow adsorption experiments have shown that 5:1 (TRIM) can completely remove 5 mg/L of Cr (VI) within 5 seconds. In addition, 5:1 (TRIM) exhibits significant selectivity in the adsorption of Cr (VI), resulting in 100% high-purity chromium.
The data quality is good.
| # | number | name | type |
| 1 | 2018YFC0406400 | National key R & D plan |
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CSTR:11738.11.ncdc.UTCMW.db2153.2022
10.12072/ncdc.UTCMW.db2153.2022