Facile synthesis of iron-based oxide from natural ilmenite with morphology controlled adsorption performance for Congo red

2019 ◽  
Vol 488 ◽  
pp. 522-530 ◽  
Author(s):  
Shunzheng Zhao ◽  
Dongjuan Kang ◽  
Zhongyu Yang ◽  
Yonghai Huang
RSC Advances ◽  
2014 ◽  
Vol 4 (53) ◽  
pp. 28119-28125 ◽  
Author(s):  
Xiuying Han ◽  
Peng Tian ◽  
Hongchang Pang ◽  
Qiang Song ◽  
Guiling Ning ◽  
...  

MgO–MgFe2O4 composites have been synthesized by a facile method, and they showed enhanced adsorption capacity and good magnetic separation performance.


2018 ◽  
Vol 78 (3) ◽  
pp. 506-514
Author(s):  
Xiaoyan Sun ◽  
Zhongwu Liu ◽  
Zhigang Zheng ◽  
Hongya Yu ◽  
Dechang Zeng

Abstract Amorphous Fe(II)–Fe(III) hydroxy complex with flower-like nanostructure was synthesized by ferric reduction using a microwave-assisted ethylene glycol approach. Here we investigated the correlation between its chemical composition and the removal rate for Congo red (CR) dye. The results showed that the amorphous complex had similar reduction and anion exchange capacities to the green rust. Due to the synergistic effect of attractive electrostatic interaction, anion exchange, ferrous redox and hydrogen bonding, the Fe(II)–Fe(III) hydroxy complex exhibited strong adsorption of CR with an estimated adsorption capacity up to 513 mg g−1. In contrast, the Fe(III) hydroxy complex had an adsorption capacity of 296 mg g−1 because of the predominant mechanism based on the electrostatic interaction. The present study provides a facile synthesis of nanostructured iron hydroxy complex, with superior performance in adsorbing CR.


2018 ◽  
Vol 47 (10) ◽  
pp. 1308-1310 ◽  
Author(s):  
Qian Zhao ◽  
Jian-ming Gao ◽  
Yanxia Guo ◽  
Fangqin Cheng

2019 ◽  
Vol 136 ◽  
pp. 06030
Author(s):  
Bai Sun ◽  
Fangwen Xu ◽  
Fei Liu ◽  
Hui Wang ◽  
Chengfeng Ding ◽  
...  

In this paper, an iron-based alumina composite was synthesized by modifying activated alumina with ferric chloride. The adsorption performance of iron-based alumina composite modified with 15% ferric chloride solution reached a certain peak. At lower initial fluoride concentration, the amount of fluoride treated by this composite is much more than that of water samples with higher initial fluoride concentration. To some degree, the slower flow rate of fluoride solution, the better adsorption performance of adsorbent. The iron-based alumina composite expressed a better performance of fluoride adsorption at pH=6.5. The adsorbent treated with aluminum potassium sulfate had the best adsorption performance.


RSC Advances ◽  
2019 ◽  
Vol 9 (35) ◽  
pp. 20009-20018 ◽  
Author(s):  
Rui-Feng Guo ◽  
Yan-Qing Ma ◽  
Zhi-Hong Liu

Three 3D hierarchical porous 7MgO·2B2O3·7H2O and 3MgO·B2O3 microspheres assembled by nanosheets have been prepared by a serial preparation strategy. They exhibited excellent selective adsorption performance for Congo red with high adsorption capacities.


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