HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Adsorption Isotherm and Kinetic Modeling of Chlordecone on Activated Carbon Derived from Date Stones

Abstract : Environment contamination by pesticides is a major issue threatening human health. Adsorption is one of the most effective processes for removing pesticides, such as the organochlorine compounds chlordecone. The objective of this study was to determine the rate of chlordecone adsorption from drinking water by date stones-based activated carbon (C.A.). This laboratory scaleexperimental study was performed during March 2016 to September 2016 in the Laboratory of Water and Environmental Sciences, Lebanese University-Faculty of Public Health. The used activated carbon was derived from date stones and activated chemically by phosphoric acid.In order to determine the adsorption efficacity of chlordecone on activated carbon derived from date stones, a mixture of 0.5g of activated carbon and 100 ml of chlordecone concentration 100 µg/l was studied under differentpH values ranging from 2 to 10 andcontact time (15, 30, 45, 60, 90, 120, 150, 180). In addition, 0.5 g of activated carbon were exposed to different initial chlordecone concentration (50, 75, 100, 250, 750) in order to determine the chlordecone concentration effect on the adsorption mechanism. The rate of residual pesticides was determined using liquid chromatography coupled to a UV/visible detector. The kinetic data were analyzed by applying pseudo-first-order and pseudo-second-order models. The applicability of Langmuir and Freundlich adsorption isotherms was evaluated to better understand the adsorption process. The results revealed that the equilibrium data were perfectly represented using Langmuir II and Freundlich isotherms. The maximum multilayer adsorption capacity was found to be at pHZPC and a contact time 90 min. The kinetic data followed closely the pseudo-second-order model. Results from this study suggest that the activated carbon produced from date stones residue is an effective, low cost and locally available adsorbent for removing chlordecone from aqueous systems. This study imposed a conclusion of great concern since activated carbon from natural resources is considered as a renewable and cheaper precursor compared to the commercially available activated carbons.
Document type :
Journal articles
Complete list of metadata

https://hal.univ-lorraine.fr/hal-03606544
Contributor : Matthieu Delannoy Connect in order to contact the contributor
Submitted on : Friday, March 11, 2022 - 7:20:20 PM
Last modification on : Wednesday, March 16, 2022 - 3:56:10 AM

File

008 - Yehya2017_JASR.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

  • HAL Id : hal-03606544, version 1

Collections

Citation

Sarah Yehya, Hiba Bakkour, Diana Eter, Moemen Baroudi, Cyril Feidt. Adsorption Isotherm and Kinetic Modeling of Chlordecone on Activated Carbon Derived from Date Stones. Journal of applied sciences research, AENSI Publication, 2017, 13 (2), pp.20-28. ⟨hal-03606544⟩

Share

Metrics

Record views

8

Files downloads

6