Valorization of Moroccan Bentonite Deposits: “Purification and Treatment of Margin by the Adsorption Process”

Molecules

Abdelmajid Moumen¹  Hanane Ait Hmeid¹  Mostapha Maach¹  Mustapha Akodad¹  Ali Skalli¹  Hicham Gueddari¹  Ghizlane Azizi¹  Mourad Baghour¹  Mimoun Aalaoul²  Ahmed Anjjar³  Lahcen Daoudi⁴ 

[1] Laboratory Observatory of the Marchica Lagoon of Nador and Limiting Regions (OLMAN-RL), Multidisciplinary Faculty of Nador, Mohamed 1st University, Nador 60700, Morocco;Laboratory of Applied Geosciences, Faculty of Sciences of Oujda, Mohamed 1st University, Oujda 60000, Morocco;Laboratory of Georessources and Environment (GRE), Faculty of Science and Technology, University Sidi Mohamed Ben Abdellah, B.P.2202-Imouzzer Road, Fes 30000, Morocco;Laboratory of Geosciences Georesources and Environment, Department of Geology, Faculty of Science and Technology University Cadi Ayyad, Marrakech 40000, Morocco;

关键词: raw bentonites;    retention;    margin;    heavy metal;    adsorption;    phenolic compounds;   

DOI  :  10.3390/molecules26185528

来源: DOAJ

【 摘 要 】

The main objective of this work was to contribute to the reduction in the contamination of phenolic compounds contained in margin by an adsorption process on two types of raw bentonite. The margin used in the studies was collected from a semi-modern oil mill located in the Nador–Morocco region. The results of the physico-chemical analyses showed that the effluents of the oil mills showed that they are highly polluted, particularly in terms of the total suspended solids (TSS), chemical oxygen demand (COD), and iron content of around 154.82 (mg/L), and copper content of 31.72 (mg/L). The mineralogy of bentonites studied by X-ray diffraction (XRD) reveals the existence of two types of montmorillonite; theoretically, the diffraction peak (001) of the montmorillonite appears at 15 Å, with a basal spacing that corresponds to a calcium pole, and the diffraction peak (001) appears at 12Å, with a basal spacing that corresponds to a sodium pole. The specific surface area of the bentonite used is characterized by a large specific surface area, varying between 127.62 m²·g⁻¹ and 693.04 m²·g⁻¹, which is due to the presence of hydrated interleaved cations. This surface is likely to increase in aqueous solution depending on the solid/liquid ratio that modulates the degree of hydration. With a high cation exchange capacity (CEC) (146.54 meq/100 g), samples of margin mixed with raw bentonites at different percentages vary between 5% and 100%. The potential of Moroccan bentonite for the phenol adsorption of 9.17 (g/L) from aqueous solutions was investigated. Adsorption tests have confirmed the effectiveness of these natural minerals in reducing phenolic compounds ranging from 8.72% to 76.23% contained in the margin and the efficiency of heavy metal retention through microelements on raw bentonites. The very encouraging results obtained in this work could aid in the application of adsorption for the treatment of margin.

【 授权许可】

Unknown