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Article Dans Une Revue Environmental Technology Année : 2024

Lead removal from the aqueous solution by extracellular polymeric substances produced by the marine diatom Navicula salinicola

Jihen Elleuch
  • Fonction : Auteur
Marwa Drira
Imtinen Ghribi
  • Fonction : Auteur
Farah Hadjkacem
  • Fonction : Auteur
Hamadi Khemakhem
  • Fonction : Auteur
Philippe Michaud
Imen Fendri
Slim Abdelkafi

Résumé

Microbial extracellular polymeric substances (EPS) have recently emerged as significant contributors in diverse biotechnological applications. Extracellular polymeric substances (EPS), produced by a Navicula salinicola strain, have been studied for potential applications in a specific heavy metal (lead (Pb II)) removal from wastewater. The optimisation of operational parameters, mainly pH, Pb and EPS concentrations, using the Box–Behnken design (BBD) was undertaken to enhance lead uptake. The higher Pb adsorption capacity reached 2211.029 mg/g. Hydroxyl, carbonyl, carboxyl, phosphoric, and sulfhydryl groups were identified quantitatively as potential sites for Pb adsorption. EPS exhibited a notable flocculation rate of 70.20% in kaolin clay at a concentration of 15 mg/L. They demonstrated an emulsifying activity greater than 88%, showcasing their versatile potential for both sedimentation processes and stabilising liquid–liquid systems. EPS could be excellent nonconventional renewable biopolymers for treating water and wastewater.
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Dates et versions

hal-04547792 , version 1 (16-04-2024)

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Citer

Jihen Elleuch, Marwa Drira, Imtinen Ghribi, Farah Hadjkacem, Guillaume Pierre, et al.. Lead removal from the aqueous solution by extracellular polymeric substances produced by the marine diatom Navicula salinicola. Environmental Technology, 2024, pp.1-13. ⟨10.1080/09593330.2024.2338456⟩. ⟨hal-04547792⟩
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