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Surface Modification of Hydrophobic Resin with Tricaprylmethylammonium Chloride for the Removal of Trace Hexavalent Chromium
Abstract
Chromium(VI) is one of the most toxic contaminants in the environment, even at low concentration. The conventional chemical precipitation process for Cr(VI) wastewater treatment becomes less effective at low Cr(VI) concentration. By a two-step solvent–nonsolvent method, tricaprylmethylammonium chloride (Aliquat 336) can be immobilized onto the surface of porous Amberlite XAD resin with good stability, giving Aliquat 336-modified resins (AMRs). Furthermore, the exposure of the cationic ammonium functional group facilitates the adsorption and stripping efficiency of Cr(VI). The amount of immobilized tricaprylmethylammonium chloride was 2.0 mmol/g of resin. A kinetic study showed that the adsorption of Cr(VI) was under film-diffusion control followed by intraparticle-diffusion control. The Cr(VI) adsorption capacity was as high as 1.37 mmol/g. More than 99% of the adsorbed Cr(VI) could be stripped during regeneration. For stability and reusability, the AMRs maintaine da high level of Cr(VI) adsorption even after four cycles of adsorption/stripping. The experimental results for actual wastewater demonstrated that the AMRs can be used effectively for the treatment of trace Cr(VI)-containing wastewater.
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In the citing paper
“At pH ≤ 1, Cr(VI) exists primarily as chromic acid (H2CrO4).”
From Optimized removal of hexavalent chromium from water using spent tea leaves treated with ascorbic acid (2022) · cites this paper as [43]
In the citing paper
“At pH 1–7, the hydrogen chromate (HCrO4–1) ion dominates, whereas above pH 7 only the chromate ion (CrO4–2) prevails40,43,44.”
From Optimized removal of hexavalent chromium from water using spent tea leaves treated with ascorbic acid (2022) · cites this paper as [43]
In the citing paper
“At pH 1–7, the hydrogen chromate (HCrO4–1) ion dominates, whereas above pH 7 only the chromate ion (CrO4–2) prevails40,43,44.”
From Optimized removal of hexavalent chromium from water using spent tea leaves treated with ascorbic acid (2022) · cites this paper as [43]
In the citing paper
“The decrease in adsorption removal—upon increasing initial Cr(VI) concentrations—can be attributed to the unavailability of sufficient adsorption sites (on t-TW) at higher initial Cr(VI) concentrations43.”
From Optimized removal of hexavalent chromium from water using spent tea leaves treated with ascorbic acid (2022) · cites this paper as [43]
In the citing paper
“To summarize, one-factor-at-a-time plots suggest (i) the greatest impact on Cr(VI) removal was pH followed by initial Cr(VI) concentration, adsorbent dosage, and temperature”
From Optimized removal of hexavalent chromium from water using spent tea leaves treated with ascorbic acid (2022) · cites this paper as [43]
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Metadata
- Authors
- Chen, J.-H., Hsu, K.-C., & Chang, Y.-M.
- Affiliations
- National Taipei University of Technology (TW)
- Corresponding author
- Chen, Jyh-Herng
- ORCID
- Chen, Jyh-Herng
- Venue
- Industrial & Engineering Chemistry Research
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-08-13
- Volume
- 52
- Issue
- 33
- Pages
- 11685-11694
- ISSN
- 0888-5885 (ISSN-L)
- 1520-5045
- OpenAlex
- W2319104705
- Cited by
- 53
- References
- 50
- Citations by year
- 2025: 2 · 2024: 1 · 2023: 3 · 2022: 5 · 2021: 5 · 2020: 7 · 2019: 8 · 2018: 4 · 2017: 4 · 2016: 2 · 2015: 9 · 2014: 3
- FWCI
- 3.88
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Industrial & Engineering Chemistry Research (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Chromium effects and bioremediation
- Physical Sciences › Materials Science › Metals and Alloys › Extraction and Separation Processes
- Keywords
- hexavalent chromium removal, Aliquat 336, cation exchange resin, adsorption kinetics, film diffusion, intraparticle diffusion, resin regeneration, adsorbent reusability
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