Regenerable zeolitic imidazolate frameworks@agarose (ZIF-8@AG) composite for highly efficient adsorption of Pb(II) from water

被引：36
|
作者：
Fu, Qiuping [1 ,2 ,3 ]
Zhou, Shaoqi [2 ]
Wu, Pan [2 ]
Hu, Jing [2 ]
Lou, Jie [3 ]
Du, Bin [3 ]
Mo, Changli [3 ]
Yan, Wei [3 ]
Luo, Jun [3 ]
机构：
[1] Guizhou Acad Sci, Guiyang 550009, Peoples R China
[2] Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550003, Peoples R China
[3] Guiyang Univ, Coll Chem & Mat Engn, Guiyang 550005, Peoples R China
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2022年 / 307卷
基金：
中国国家自然科学基金;
关键词：
ZIF-8@AG; Pb(II); Adsorption; Water treatment; Regeneration; METAL-ORGANIC FRAMEWORK; AQUEOUS-SOLUTION; HEAVY-METALS; FAST REMOVAL; CONGO RED; ACID; CAPACITY; CHITOSAN; PB2+; DYE;
D O I：
10.1016/j.jssc.2021.122823
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The composite zeolitic imidazolate frameworks@agarose (ZIF-8@AG) was prepared by ZIF-8 and agarose (AG) in this study. The composite ZIF-8@AG with a good quality, was assessed for Pb(II) adsorption and regeneration from water. The effects of the contact time, initial concentration of Pb(II), adsorbent dosage, pH, coexisting ions (Ca2+ and Mg2+), temperature and other factors on the adsorption performance of Pb(II) on ZIF-8@AG were investigated. The pseudo-second-order kinetic model can well describe the adsorption process of Pb(II) on ZIF-8@AG. Thermodynamic parameters (Delta G, Delta H and Delta S) confirmed exothermic and spontaneous process. In the regeneration experiment, ZIF-8@AG maintained a high adsorption capacity for Pb(II) after 6 times of adsorption-desorption cycles. The experimental results showed that the ZIF-8@AG not only has a high adsorption efficiency for Pb(II), but also has a good stability for recycling.
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页数：9
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