Modification of Phu Yen diatomite and its application to Cr(VI) removal in aqueous medium
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Keywords

diatomite
modification
adsorption
Cr(VI)

How to Cite

1.
Tran VT. Modification of Phu Yen diatomite and its application to Cr(VI) removal in aqueous medium. hueuni-jns [Internet]. 2023Jun.30 [cited 2024Feb.26];132(1B):113-21. Available from: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/6942

Abstract

In this study, we successfully prepared a carboxyl-rich carbon nanomaterial from Phu Yen natural diatomite and used it as an effective adsorbent to remove Cr(VI) in aqueous media. The obtained nanomaterial was characterized by means of XRD, SEM, EDS, and FT-IR. The adsorption characteristics of Cr(VI) were investigated. pH has a significant influence on the adsorption process, and pH = 1 is optimal for Cr(VI) adsorption at ambient temperature. Three types of materials were prepared, including natural diatomite (DE), modified diatomite with carbon nanomaterial (DE/S), and modified diatomite with carboxyl-rich carbon nanomaterial (DE/C-S), and DE/C-S exhibits the highest adsorption capacity under the optimal conditions. The pseudo-second-order kinetic model and the Langmuir isotherm well describe the adsorption process of Cr(VI) onto DE/C-S with the maximum adsorption capacity of 58.82 mg·g–1, which is significantly higher compared with that of the natural diatomite (2.29 mg·g–1). Carboxyl-rich carbon-modified diatomite nanomaterials have great potential for use in removing Cr(VI) from wastewater.

https://doi.org/10.26459/hueunijns.v132i1B.6942
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References

  1. USEPA. Chromium in Drinking Water. EPA; 2022.
  2. QCVN 01-1:2018/BYT. Hanoi: National technical regulation on Domestic Water Quality; 2018.
  3. Chen L-F, Liang H-W, Lu Y, Cui C-H, Yu S-H. Synthesis of an Attapulgite Clay@Carbon Nanocomposite Adsorbent by a Hydrothermal Carbonization Process and Their Application in the Removal of Toxic Metal Ions from Water. Langmuir. 2011;27(14):8998-9004.
  4. Hossam EGMMB. Diatomite: Its Characterization, Modifications and Applications, Asian Journal of Materials Science 2010;2(3):121-136.
  5. Khieu DQ, Hoa TT, Thien TV. Study on adsorption process of methylene blue by Phu Yen diatomte: kinetics, thermodynamics and adsorption isotherms. Journal of Chemistry. 2010;48(2):163-168. (in Vietnamese)
  6. ISO 11083:1994. Water quality - Determination of chromium(Vl) - Spectrometric method using 1,5-diphenylcarbazide; 2021.
  7. Thien TV, Tu NTT, Son BHD. Study on the modification of Phu Yen diatomite by mixed Fe-Mn oxide and the use of the modified material as an arsenic removal adsorbent in water environment. Vietnam Journal of Catalysis and Adsorption. 2020;10(1):13-20. (in Vietnamese)
  8. Ola A. Kinetic and isotherm studies of copper (II) removal from wastewater using various adsorbents. Egytian Journal of Aquatic Research. 2007;33(1):125- 143.
  9. Ho YS, McKay G, Was, DAJ, Foster CF. Study of the sorption of divalent metal ions on to peat. Adsorption Science & Technology. 2000;18:639-650.
  10. Yuan P, Liu D, Fan M, Yang D, Zhu R, Ge F, et al. Removal of hexavalent chromium [Cr(VI)] from aqueous solutions by the diatomite-supported/unsupported magnetite nanoparticles. Journal of Hazardous Materials. 2010;173(1):614-21.
  11. Minh VX, Dung NT, My NT, Huong LTM. Study on the activation of red mud by sulfuric acid and investigate the adsorption capacity of Cr(VI). Vietnam Journal of Chemistry. 2015;53(4):475-479. (in Vietnamese)
  12. Selvi K, Pattabhi S, Kadirvelu K. Removal of Cr(VI) from aqueous solution by adsorption onto activated carbon. Bioresource Technology. 2001;80(1):87-9.
  13. Di Z-C, Ding J, Peng X-J, Li Y-H, Luan Z-K, Liang J. Chromium adsorption by aligned carbon nanotubes supported ceria nanoparticles. Chemosphere. 2006;62(5):861-5.
  14. Al-Othman ZA, Ali R, Naushad M. Hexavalent chromium removal from aqueous medium by activated carbon prepared from peanut shell: Adsorption kinetics, equilibrium and thermodynamic studies. Chemical Engineering Journal. 2012;184:238-47.
  15. Huong DT, Thanh DV, Khue MQ, Ngan NTK. Adsorption of Cr(VI) in aqueous medium by KOH modified tea residue adsorbent. Vietnam Journal of Chemistry. 2016;54(1). (in Vietnamese)
  16. Tinh LT. Study on Cr adsorption capacity on rice husks and treatment applications to separate Cr from wastewater [Master thesis]. Hanoi: Hanoi University of Natural Science; 2011. (in Vietnamese)
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