Abstract

Research Article

Behavior evaluation of freundlich and langmuir isotherms in cadmium preconcentration using solid phase extraction method for linear and nonlinear numerical computational patterns

Benyamin Chahkandi, Mohammad Gheibi* and Amir Takhtravan

Published: 08 September, 2021 | Volume 5 - Issue 1 | Pages: 007-010

Cadmium is naturally present in the mineral cadmium sulfide which is a rare form of this element and the highest amount of cadmium is obtained from the extraction process of other minerals such as lead, copper and zinc. The release of this metal into the environment leads to widespread epidemiological effects. Therefore, measuring small amounts of this metal is also of particular importance. Small amount measuring methods of this metal are such as,preconcentration using solid phase extraction system using adsorbents. The main part of the preconcentration process is achieved by adsorption processes. In this study, the behavior of Freundlich and Langmuir adsorption isotherms for the capacity of TMON and IMNM adsorbents in cadmium adsorption has been evaluated by Power and Rational statistical distributions. At the end of the study, the constant coefficients of the Freundlich and Langmuir models were compared in both linear and non-linear modes. The results showed; the linearization method for the Kf coefficient of the Freundlich isotherm can cause errors equal to 41.6% in TMON adsorbent and 39.3% in IMNM adsorbent. Also, in parameter b, errors of 66.66% are obtained in TMON adsorbent and 32.45% in IMNM adsorbent.

Read Full Article HTML DOI: 10.29328/journal.acee.1001029 Cite this Article Read Full Article PDF

Keywords:

Cadmium; Solid phase extraction; Friendlich isotherm; Langmuir isotherm; Statistical distributions

References

  1. Kjellström T. Mechanism and epidemiology of bone effects of cadmium.IARC Sci Publ. 1991; 301-310. PubMed: https://pubmed.ncbi.nlm.nih.gov/1303956/
  2. Friberg L, Piscator M, Nordberg GF, Kjellström T.Cadmium in the Environment (No. 2nd edition). 1974.
  3. Fang GZ, Tan J, Yan XP. An ion-imprinted functionalized silica gel sorbent prepared by a surface imprinting technique combined with a sol− gel process for selective solid-phase extraction of cadmium (II).Anal Chem. 2005; 77: 1734-1739. PubMed: https://pubmed.ncbi.nlm.nih.gov/15762579/
  4. Gregg SJ, Sing KSW, Salzberg HW. Adsorption surface area and porosity.J Electrochem Soc. 1967: 114: 279C-279C.
  5. Bradl HB. Adsorption of heavy metal ions on soils and soils constituents.J Colloid Interface Sci. 2004; 277: 1-18. PubMed: https://pubmed.ncbi.nlm.nih.gov/15276031/
  6. Fu F, Wang Q. Removal of heavy metal ions from wastewaters: a review.J Environ Manage. 2011; 92: 407-418. PubMed: https://pubmed.ncbi.nlm.nih.gov/21138785/
  7. Foo KY, Hameed BH. Insights into the modeling of adsorption isotherm systems.Che Eng J. 2010; 156: 2-10.
  8. Bayisa KC. Chelating Agent Free Solid Phase Extraction (CAF–SPE) of Lead, Cadmium and Chromium by Fe-Al-Zr Ternary Mixed Oxides Nanocomposite. Thesis Submitted to the Department of Chemistry, Postgraduate Program Directorate, Haramaya University.
  9. Abbasi S, ShanbehDehbalai M, Khani H. Solid phase extraction of trace amounts of cadmium (II) ions in water and food samples using iron magnetite nanoparticles modified by sodium dodecyl sulfate and 2-mercaptobenzothiazole. Water Sci Technol. 2017; 75: 1440-1446. PubMed: https://pubmed.ncbi.nlm.nih.gov/28333059/

Figures:

Figure 1

Figure 1

Figure 1

Figure 2

Figure 1

Figure 3

Figure 1

Figure 4

Figure 1

Figure 5

Similar Articles

Recently Viewed

Read More

Most Viewed

Read More

Help ?