Exceptional arsenic (III,V) removal performance of highly porous, nanostructured ZrO2 spheres for fixed bed reactors and the full-scale system modeling

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	Exceptional arsenic (III,V) removal performance of highly porous, nanostructured ZrO2 spheres for fixed bed reactors and the full-scale system modeling
	H. Cui; Y. Su; Q. Li; S. Gao; J. K. Shang
	2013
发表期刊	Water Research
ISSN	0043-1354
卷号	47 期号:16 页码:6258-6268
摘要	Highly porous, nanostructured zirconium oxide spheres were fabricated from ZrO2 nanoparticles with the assistance of agar powder to form spheres with size at millimeter level followed with a heat treatment at 450 degrees C to remove agar network, which provided a simple, low-cost, and safe process for the synthesis of ZrO2 spheres. These ZrO2 spheres had a dual-pore structure, in which interconnected macropores were beneficial for liquid transport and the mesopores could largely increase their surface area (about 98 m(2)/g) for effective contact with arsenic species in water. These ZrO2 spheres demonstrated an even better arsenic removal performance on both As(III) and As(V) than ZrO2 nanoparticles, and could be readily applied to commonly used fixed-bed adsorption reactors in the industry. A short bed adsorbent test was conducted to validate the calculated external mass transport coefficient and the pore diffusion coefficient. The performance of full-scale fixed bed systems with these ZrO2 spheres as the adsorber was estimated by the validated pore surface diffusion modeling. With the empty bed contact time (EBCT) at 10 mm and the initial arsenic concentration at 30 ppb, the number of bed volumes that could be treated by these dry ZrO2 spheres reached similar to 255,000 BVs and similar to 271,000 BVs for As(III) and As(V), respectively, until the maximum contaminant level of 10 ppb was reached. These ZrO2 spheres are non-toxic, highly stable, and resistant to acid and alkali, have a high arsenic adsorption capacity, and could be easily adapted for various arsenic removal apparatus. Thus, these ZrO2 spheres may have a promising potential for their application in water treatment practice. (C) 2013 Elsevier Ltd. All rights reserved.
部门归属	[cui, hang ; su, yu ; li, qi ; gao, shian ; shang, jian ku] chinese acad sci, inst met res, shenyang natl lab mat sci, environm funct mat div, shenyang 110016, liaoning provin, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa. ; li, q (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, environm funct mat div, 72 wenhua rd, shenyang 110016, liaoning provin, peoples r china. ; qili@imr.ac.cn
关键词	Nanostructured Zro2 Spheres As(Iii) And As(v) Removal Adsorption Short Bed Adsorber (Sba) Test Pore Surface Diffusion Model (Psdm) Nanocrystalline Titanium-dioxide Situ Preconcentration Method Hydrous Zirconium-oxide Acid Chelating Resin Activated Carbon Aqueous-solutions Adsorption Mechanism Environmental Water Mass-transfer Iron
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71176
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Cui,Y. Su,Q. Li,et al. Exceptional arsenic (III,V) removal performance of highly porous, nanostructured ZrO2 spheres for fixed bed reactors and the full-scale system modeling[J]. Water Research,2013,47(16):6258-6268.
APA	H. Cui,Y. Su,Q. Li,S. Gao,&J. K. Shang.(2013).Exceptional arsenic (III,V) removal performance of highly porous, nanostructured ZrO2 spheres for fixed bed reactors and the full-scale system modeling.Water Research,47(16),6258-6268.
MLA	H. Cui,et al."Exceptional arsenic (III,V) removal performance of highly porous, nanostructured ZrO2 spheres for fixed bed reactors and the full-scale system modeling".Water Research 47.16(2013):6258-6268.