Synthesis and characterization of low-cost Moroccan pozzolan-alginate adsorbents for methylene blue removal from water: Kinetics and mechanism

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Liquids Pub Date : 2025-02-15 DOI:10.1016/j.molliq.2025.127162

Nadia Bougdour , Idriss Bakas , Abdulrahman Bin Jumah , Imran Ali , Tonni Agustiono Kurniawan , Ali Assabbane

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Abstract

Water contamination due to methylene blue (MB) is a world-wide problem and needs attention by developing good adsorption methods. Consequently, novel inexpensive adsorbents were prepared using Moroccan Pozzolan i.e. Pozzolan Laayoune (PZL) powder, Pozzolan Timahdite (PZT) powder, Pozzolan Laayoune Alginate beads (PZLA-beads), and Pozzolan Timahdite Alginate beads (PZTA-beads). These materials were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray fluorescence (XRF), scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), point of zero charge (pHpzc), and Brunauer-Emmett-Teller (BET). These adsorbents were used for the removal of MB from water. The data fitted well to the Langmuir model with maximum adsorption capacities (q_max) of 80, 91.73, 62.11, and 67.11 mg/g for PZL powder, PZLA-beads, PZT powder, and PZTA-beads, respectively with pseudo-second-order kinetics. Furthermore, Moroccan pozzolan beads (PZLA-beads) were tested for the treatment of real textile effluents; showing complete removal of MB. The desorption studies demonstrated that the pozzolan-based adsorbents acted as a regenerative, and reusable sorbent. The results indicated that Moroccan pozzolan-based adsorbents may be recommended for the treatment of textile wastewater containing MB dye.

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.