التفاصيل البيبلوغرافية
| العنوان: |
Outstanding adsorption characteristics of an aminophosphonic acid chelating fiber for calcium and magnesium ions. |
| المؤلفون: |
Da-Xin Liu, Gang Xu, Zhao-Wen Chen, Guo-Qing Huang, Ming-Hong Wu |
| المصدر: |
Desalination & Water Treatment; May2023, Vol. 295, p64-72, 9p |
| مصطلحات موضوعية: |
MAGNESIUM ions, ADSORPTION (Chemistry), ADSORPTION capacity, CHELATES, AQUEOUS solutions |
| مستخلص: |
The study focused on the synthesis and applications of an aminophosphonic acid chelating fiber (PAN-PNa) for the deep removal of Ca2+ and Mg2+ from aqueous solutions in the chlor-alkali industry. As an effective material for the replacement of aminophosphonic acid resins, PAN-PNa achieved outstanding adsorption results for Ca2+ and Mg2+. The material was prepared by the Kabachnik-Fields one-pot reaction using an amine-based fiber (PAN-PEI) as precursor. The saturated adsorption capacities of PAN-PNa for Ca2+ and Mg2+ were significantly higher than those of existing aminophosphonic acid resin, reaching 3.07 and 3.12 mmol/g, respectively. These values were sustained even at low ion concentrations, and in a wide pH range of 3-11 and 3-10, respectively. The adsorption of the ions reached equilibrium within 5 min, which is an excellent improvement from conventional granular adsorbents (about 40-80 min). The excellent performance of PAN-PNa was attributed to its phosphoramidate group and special nano-towed structure. Therefore, by exhibiting both fast adsorption rate and high adsorption capacity at low ion concentration, PAN-PNa is a promising new material for the deep removal of Ca2+ and Mg2+ from aqueous solutions. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
