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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
Abstract
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 °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 min and the initial arsenic concentration at 30 ppb, the number of bed volumes that could be treated by these dry ZrO2 spheres reached ~255,000 BVs and ~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.
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According to Hussam and Munir, approximately 350,000 ZVI filters are operational in Bangladesh, Nepal, Pakistan, India, and Egypt, and there are several studies showing promising results of arsenic removals in field.
“According to Hussam and Munir [190], approximately 350,000 ZVI filters are operational in Bangladesh, Nepal, Pakistan, India, and Egypt and there are several studies showing promising results of As removals in field [188–192].”
From Arsenic Contamination of Groundwater: A Review of Sources, Prevalence, Health Risks, and Strategies for Mitigation (2014) · cites this paper as [189]
Removal of arsenic using zero valent iron has been widely explored by several research groups both in the laboratory and in the field.
“In the last decade, removal of As using zero valent iron (ZVI) or Fe(0) for removal of As has been widely explored by several research groups both in the laboratory [142, 186, 187] and in the field [188–192].”
From Arsenic Contamination of Groundwater: A Review of Sources, Prevalence, Health Risks, and Strategies for Mitigation (2014) · cites this paper as [189]
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Shankar, S., Shanker, U., & Shikha (2014) · The Scientific World Journal · doi:10.1155/2014/304524 · Cited by 616
“Cui et al., 2013 [196], synthesized highly porous, nanostructured ZrO 2 spheres from amorphous ZrO 2 nanoparticles with the help of a food-safe additive, agar powder, which yielded a simple, cheaper, and safer process for the synthesis of ZrO 2 spheres.”
BackgroundRivas, B. L., Urbano, B. F., & Sánchez, J. (2018) · Frontiers in Chemistry · doi:10.3389/fchem.2018.00320 · Cited by 104
Metadata
- Authors
- Cui, H., Su, Y., Li, Q., Gao, S., & Shang, J. K.
- Affiliations
- Chinese Academy of Sciences (CN)
- University of Illinois Urbana-Champaign (US)
- Corresponding author
- Li, Qi
- Venue
- Water Research
- Publisher
- Elsevier BV
- Published
- 2013-10
- Volume
- 47
- Issue
- 16
- Pages
- 6258-6268
- ISSN
- 0043-1354 (ISSN-L)
- OpenAlex
- W2135854510
- Cited by
- 108
- References
- 0
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 5 · 2023: 9 · 2022: 12 · 2021: 13 · 2020: 7 · 2019: 12 · 2018: 11 · 2017: 10 · 2016: 4 · 2015: 13 · 2014: 7
- FWCI
- 6.36
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Water Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (51102246)
- Knowledge Innovation Program of Institute of Metal Research, Chinese Academy of Sciences (Y0N5A111A1)
- Youth Innovation Promotion Association, Chinese Academy of Sciences (Y2N5711171)
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, P.R. China
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Arsenic contamination and mitigation
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Environmental Engineering › Environmental remediation with nanomaterials
- Keywords
- arsenic removal, zirconia nanoparticles, fixed-bed adsorption, arsenite, arsenate, pore diffusion coefficient, water treatment, adsorbent regeneration
- MeSH terms
- Arsenic, Zirconium, Porosity, Water Purification, Bioreactors, Nanostructures
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