Статья

Effective Removal of Calcium and Magnesium Ions from Water by a Novel Alginate–Citrate Composite Aerogel

Zhuqing WangCollege of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246133, ChinaZhongmin FengCollege of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246133, ChinaLeilei YangCollege of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246133, ChinaMin WangCollege of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246133, China

2021en

ABI

Аннотация

In this work, a novel alginate/citrate composite aerogel (CA–SC) was synthesized by chemical grafting technology combined with vacuum freeze-drying method, and CA–SC was used for removing calcium (Ca2+) and magnesium (Mg2+) ions from water. The experimental results indicate that the as-prepared CA–SC has a high affinity for Ca2+ and Mg2+ and can remove 96.5% of Ca2+ (or 96.8% of Mg2+) from the corresponding solution. The maximum adsorption capacities of CA–SC for Ca2+ and Mg2+ are 62.38 and 36.23 mg/g, respectively. These values are higher than those of the most reported Ca2+-sorbents and Mg2+-sorbents. The CA–SC adsorbent can be regenerated through a simple pickling step, and its adsorption performance keeps stable after repeated use. Analysis of the adsorption mechanism shows that the CA–SC combines Ca2+ and Mg2+ in water mainly through coordination effect.

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Идентификаторы

DOI: 10.3390/gels7030125

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar