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Modeling Cadmium Adsorption by Activated Carbon Using the Langmuir and Freundlich Isotherm Expressions
Abstract
Cadmium adsorption isotherms were conducted using two commercially available powdered activated carbons (PACs). Isotherms were conducted at several pH values and metal and carbon concentrations. Both PACs removed significant amounts of cadmium, and removal was a strong function of solution pH: increasing the solution pH increased cadmium adsorption. Adsorption data at a specific pH were successfully modeled using both the Langmuir and Freundlich isotherms. Adsorption and surface precipitation were hypothesized to be the operative removal mechanisms. Cadmium removal is strongly related to the carbon's pHzpc, acid-base characteristics, and surface charge-pH relationship. Surface area, an important adsorption parameter for organic adsorbates, does not appear to influence metal removal strongly.
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Cited by
The characterization of activated carbons with oxygen and nitrogen surface groups
Biniak, S., Szymański, G., Siedlewski, J., & Świątkowski, A. (1997) · Carbon · doi:10.1016/s0008-6223(97)00096-1 · Cited by 1,513
Desta, M. B. (2013) · Journal of Thermodynamics · doi:10.1155/2013/375830 · Cited by 447
Facile preparation of N-doped activated carbon produced from rice husk for CO2 capture
He, S., Chen, G., Xiao, H., Shi, G., Ruan, C., Ma, Y., Dai, H., Yuan, B., Chen, X., & Yang, X. (2021) · Journal of Colloid and Interface Science · doi:10.1016/j.jcis.2020.08.021 · Cited by 375
Tong, Y., McNamara, P. J., & Mayer, B. K. (2019) · Environmental Science: Water Research & Technology · doi:10.1039/c8ew00938d · Cited by 313
Preparation and characterization of nano chitosan for treatment wastewaters
Sivakami, M. S., Gomathi, T., Venkatesan, J., Jeong, H.-S., Kim, S.-K., & Sudha, P. N. (2013) · International Journal of Biological Macromolecules · doi:10.1016/j.ijbiomac.2013.03.005 · Cited by 287
Metadata
- Authors
- Reed, B. E., & Matsumoto, M. R.
- Venue
- Separation Science and Technology
- Publisher
- Informa UK Limited
- Published
- 1993-10
- Volume
- 28
- Issue
- 13-14
- Pages
- 2179-2195
- ISSN
- 0149-6395 (ISSN-L)
- 1520-5754
- OpenAlex
- W2033285390
- Cited by
- 346
- References
- 0
- FWCI
- 9.62
- Type
- journal article
- Language
- en
- Open access
- closed
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- Reed, B. E., & Matsumoto, M. R. (1993). Modeling Cadmium Adsorption by Activated Carbon Using the Langmuir and Freundlich Isotherm Expressions. Separation Science and Technology. https://doi.org/10.1080/01496399308016742
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
