Dried sewage sludge as an efficient adsorbent for pollutants: cationic methylene blue removal case study
Type
ArticleAuthors
Aoulad El Hadj Ali, Youssef
Ahrouch, Mohammadi
Ait Lahcen, Abdellatif

Demba N’diaye, Abdoulaye
El Yousfi, Farida
Stitou, Mostafa
Date
2021-03-17Embargo End Date
2022-03-17Submitted Date
2020-12-01Permanent link to this record
http://hdl.handle.net/10754/668235
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Sewage sludge valorization must be the favored solution of management for a residue that does not present the desired improvement in terms of wastewater treatment. The objective of this research work was to study the dye fixation capacity of the adsorbents produced from sewage sludge. The dried sewage sludge (DSS) was used as an adsorbent to remove a cationic dye, methylene blue (MB), from an aqueous solution in a batch system, as a function of contact time, pH, temperature and initial concentration. The proposed adsorbent was characterized using several techniques such as scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). The adsorption equilibrium of MB was described using Langmuir, Freundlich and Sips equations. The equilibrium is perfectly adapted to the Langmuir model with a maximum adsorption capacity of 44.39 mg g−1 on a single layer. In order to study the adsorption mechanisms, first- and second-order kinetic models were used. The adsorbent produced from the sludge was capable of absorbing MB from the solution, with the expression of the second-order rate being preferred to that of the first order. In addition, the thermodynamic parameters were evaluated, demonstrating that the adsorption process is spontaneous and endothermic. Thus, this study convinced that the DDS proved to be an alternative, attractive, effective, economic, and environmentally friendly adsorbent for MB dye removal from aqueous solution. Graphic abstract: Schematic illustration of the prepared dried sewage sludge adsorbent for the removal of methylene blue from aquatic samples [Figure not available: see fulltext.].Citation
Aoulad El Hadj Ali, Y., Ahrouch, M., Ait Lahcen, A., Demba N’diaye, A., El Yousfi, F., & Stitou, M. (2021). Dried sewage sludge as an efficient adsorbent for pollutants: cationic methylene blue removal case study. Nanotechnology for Environmental Engineering, 6(1). doi:10.1007/s41204-021-00111-6Sponsors
The research work was supported by Ministry of Energy, and Mines and the Environment within the Research Project with grant number 018-1212-00019.Publisher
Springer NatureAdditional Links
http://link.springer.com/10.1007/s41204-021-00111-6ae974a485f413a2113503eed53cd6c53
10.1007/s41204-021-00111-6