Publications Internationales

Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/13

Browse

Author: search.filters.author.Bouaissi, Aissa

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Ten-year assessment of the stabilization/solidification method applied to Algerian oil-based drill cuttings: Ain Amenas oil field case study
    (Springer Science and Business Media, 2025) Lounas, Oualid; Malek, Ammar; Aribi, Chouaib; Bouaissi, Aissa; Rekbi, Fares Mohammed Laid
    he effective management and permanent monitoring of the treatment quality of hydrocarbon-contaminated drill cuttings from oil activities constitute major environmental challenges for ensuring treatment’s sustainability and long-term protection of ecosystems. This study investigates the effectiveness of the stabilization/solidification (S/S) process using cement and sodium silicate for treating this hazardous waste from the Ain Amenas site in Algeria. The short-term environmental performance of the process was assessed on cuttings stabilized for a decade, through leaching tests, focusing on parameters such as the total hydrocarbon index (THI), chemical oxygen demand (COD), biological oxygen demand (BOD5), total organic carbon (TOC), and concentrations of heavy metals. Other analyses such as XRD, XRF, and combined (SEM/EDX) were carried out on the stabilized cuttings. Preliminary findings demonstrate successful immobilization of hydrocarbons, organic matter, and several heavy metals (Ni, Zn, Cd, Pb, Hg). However, chromium consistently exceeded tolerable leaching limits, motivating the need to establish potential reasons. SEM/EDX structural analysis showed a heterogenic solid cement matrix with porous areas, enriched in quartz, carbonates, and calcium silicate hydrates (C-S-H), indicative of durable structural properties. XRD effectively showed the complexation of trivalent and hexavalent chromium forms within many cement molecules. However, high levels of residual chlorides and organic matter are of concern as they can successively cause weakening of structures and oxidative action of heavy metals and their release. While S/S is effective in converting pollutant cuttings into a stable form, its weakness in chromium retention requires further optimization to ensure its safe and sustainable application in waste disposal or reuse strategies
  • No Thumbnail Available
    Item
    Synthesis of resin from Alfa stem to applied as an adhesive corrosion-resistant coating
    (Springer Nature link, 2025) Toubal, Sara; Aribi, Chouaib; Chentir, Imen; Safi, Brahim; Bouaissi, Aissa; Saidi, Mohammed
    The demand for eco-friendly alternatives to petrochemical-based phenolic resins has risen due to increasing concerns about climate change, environmental impact, and manufacturing costs. This study introduces a sustainable approach by partially replacing phenol with lignin, a natural polymer rich in phenolic groups, extracted from Alfa stems. Using the alkaline method, 50% of phenol was substituted with lignin to synthesize phenol–formaldehyde (PF) resins. The synthesized lignin–phenol– formaldehyde (LPF) resin was characterized to verify its chemical structure and physical properties. The resin demonstrated significant antioxidant and antibacterial activity, particularly against E. coli and P. aeruginosa gram-negative bacteria at a concentration of 20 mg/ml. Additionally, the lignin substitution provided notable advantages over conventional industrial resin formulations. The lignin’s properties closely influenced the formulation of the LPF resin, making it similar to the reference CPF resin. However, the lower intensity observed in the LPF resin suggests potential limitations in the methylol group formation compared to the CPF resin. The antioxidant activity of LPF resin has been effectiveness in preventing cor- rosion on steel surfaces. When applied as an anti-corrosion coating and compared to industrially used CPF resins, LPF resin demonstrates its efficacy in such applications. Also, it should be noted that the impedance modulus of the elaborated resin coating remained consistently low throughout the entire immersion period, indicating its stable performance.
  • No Thumbnail Available
    Item
    An experimental study on damaged cementitious mortars repaired by glass/epoxy composite materials
    (Sciendo, 2020) Aribi, Chouaib; Bouaissi, Aissa; Safi, Brahim; Saidi, Mohammed
    This paper presents an experimental investigation on the post-repair flexural response of mortars with and without damage. In order to improve the mechanical properties of the damaged mortars, which were subjected to different loads ranging between 40 % and 90 %, the mortars specimens were reinforced and repaired using two different composite materials, the first with only epoxy resin, while the second consisted of a mixture of epoxy resin and glass fiber. The results show a significant improvement in the stiffness damaged. Therefore, the reinforced specimens by a layer of resin on the lower side surface increased the bending strength by 58 %, when compared to those control samples. The reinforcement using composite resin-fiber of glass exhibited considerable increases in the safety of constructions. The SEM images of damaged samples with and without repair, revealed the impact of reinforced glass fibers-mortar on the matrix-mortar by improving theirs mechanical performances