Fixed-bed column studies for the removal of anionic dye from aqueous solution using TiO2@glucose carbon composites and bed regeneration study

NWIPB OpenIR

	Fixed-bed column studies for the removal of anionic dye from aqueous solution using TiO2@glucose carbon composites and bed regeneration study
	Zheng, Pei ; Bai, Bo ; Guan, Weisheng ; Wang, Honglun ; Suo, Yourui
	2016
发表期刊	JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
摘要	Glucose carbon with uniform diameter was successfully anchored by TiO2 nanoparticles via a facile low-temperature hydrothermal process independent of surfactants or external forces. The resultant TiO2@glucose carbon composite (TiO2@GCs) was characterized by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The elimination of direct deep blue (DDB) from aqueous solution by adsorption onto TiO2@GCs was investigated in the up-flow fixed-bed columns. The effects of the influent concentration (10-30 mg L-1), flow rate (3-5 mL min(-1)), bed depth (1.0-2.0 cm) and pH (1.0-9.0) were investigated. Breakthrough time and adsorption capacity of the fixed-bed increased with increasing bed depth, whereas decreased with the increase in initial concentration, bed depth and solution pH values. The experimental data was in good agreement with both Thomas model and Yoon-Nelson model. The employed bed saturated with DDB was readily regenerated through a simple regeneration process with UV irradiation for 1 h. Furthermore, the adsorption-regeneration process was conducted for six cycles and no major decrease of regeneration efficiency was observed for the first three cycles. One possible mechanism for regenerating dye-loaded TiO2@GCs was proposed. The verifying experiment found that hydroxyl radicals and superoxide ions significantly affected the regeneration of employed TiO2@GCs bed.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/17665
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Zheng, Pei,Bai, Bo,Guan, Weisheng,et al. Fixed-bed column studies for the removal of anionic dye from aqueous solution using TiO2@glucose carbon composites and bed regeneration study[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,2016.
APA	Zheng, Pei,Bai, Bo,Guan, Weisheng,Wang, Honglun,&Suo, Yourui.(2016).Fixed-bed column studies for the removal of anionic dye from aqueous solution using TiO2@glucose carbon composites and bed regeneration study.JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS.
MLA	Zheng, Pei,et al."Fixed-bed column studies for the removal of anionic dye from aqueous solution using TiO2@glucose carbon composites and bed regeneration study".JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2016).