Bentonite Clay Articles

  • Multi-metals column adsorption of lead(II), cadmium(II) and manganese(II) onto natural bentonite clay

    The present work was aimed at evaluating the multi-metals column adsorption of lead(II), cadmium(II) and manganese(II) ions onto natural bentonite. The bentonite clay adsorbent was characterized for physical and chemical properties using X-ray diffraction, X-ray fluorescence, Brunauer-Emmett-Teller surface area and cation exchange capacity. The column performance was evaluated using adsorbent ...


    By IWA Publishing

  • Adsorption studies of Orange II onto polyaniline/bentonite nanocomposite

    Modification of bentonite is essential for the adsorption of anionic dyes, as its negative surface charge. In this study, polyaniline/bentonite (PAni-Bent) nanocomposite was synthesized by in-situ intercalative polymerization technique and used to remove anionic dye Orange II (ORII) from synthetic wastewater. Its structure was confirmed by X-ray diffraction (XRD), scanning electron ...


    By IWA Publishing

  • Application of cryptocrystalline magnesite-bentonite clay hybrid for defluoridation of underground water resources: implication for point of use treatment

    A new synthesis method was established to fabricate a nanocomposite material comprising of cryptocrystalline magnesite and bentonite clay that has high adsorption capacity for ionic pollutants. To synthesize the composite at 1:1 weight (g): weight (g) ratio, a vibratory ball mill was used. Batch adsorption experiments were carried out to determine optimum conditions for fluoride adsorption. ...


    By IWA Publishing

  • Visible light induced photocatalytic degradation of rhodamine B by magnetic bentonite

    The photocatalytic activity of magnetic bentonite, Fe3O4 nanoparticles decorated Al-pillared bentonite (Fe3O4/Al-B), for the degradation of rhodamine B (RhB) in the presence of H2O2 under visible light (VL) was evaluated. The effects of different reaction parameters such as catalyst dose, dye concentration and externally added ...


    By IWA Publishing

  • Adsorption of reactive green 19 from water using polyaniline/bentonite

    Polyaniline/bentonite was used in this study to investigate its adsorption behaviors of reactive green 19. Influencing factors including contact time, pH, temperature and inorganic salts were investigated. The adsorption kinetic data fitted the pseudo-second-order model better than the pseudo-first-order and Elovich models, and the Langmuir model was better than the Freundlich model to ...


    By IWA Publishing

  • Enhanced decolorization of dyes by an iron modified clay and thermodynamic parameters

    The sorption processes of red 5 (R5) and yellow 5 (Y5) dyes by iron modified and sodium bentonite in aqueous solutions was evaluated. The modified clay was prepared, conditioned and characterized. The sodium clay did not remove any of either dye. The sorption kinetics and isotherms of R5 and Y5 dyes by iron modified clay were determined. The maximum removal percentages achieved were 97% and ...


    By IWA Publishing

  • Utilization of cross-linked chitosan/bentonite composite in the removal of methyl orange from aqueous solution

    A kind of biocomposite was prepared by the intercalation of chitosan in bentonite and the cross-linking reaction of chitosan with glutaraldehyde, which was referred to as cross-linked chitosan/bentonite (CCS/BT) composite. Adsorptive removal of methyl orange (MO) from aqueous solutions was investigated by batch method. The adsorption of MO onto CCS/BT composite was affected by the ratio of ...


    By IWA Publishing

  • Removal of toxic elements from aqueous solution using bentonite modified with l-histidine

    This study proposes the use of bentonite modified with l-histidine for the removal of Cu, Co, Cr, Fe, Hg, Ni, U and Zn from aqueous solutions such as those impacted by acidic drainage. The surface areas of natural bentonite and bentonite–histidine were 73.8 and 61.2 m2 g−1, respectively. Elemental analysis showed an increase in the amount of carbon (0.258%) ...


    By IWA Publishing

  • Enhanced oil–mineral aggregation with modified bentonite

    The application of modified-bentonite-enhanced oil dispersion in water and oil–mineral aggregate (OMA) formation was studied in the laboratory. The effect of modification on the surface properties of bentonite was characterized. The hydrophobicity and surface electric properties of bentonite were significantly improved by attaching cetyltrimethyl ammonium bromide to its surface. The ...


    By IWA Publishing

  • Case study - pumping bentonite

    Location: Germany Year: 2009 Working Context description The project is the construction of a big commercial and residential area in northern Germany during foundations phase. Diaphragm walls and Cut Off Walls are a techniques for the construction of permanent or temporary in-situ impermeable barriers. In order to stabilize side walls ...


    By Dragflow North America

  • Different methods for stabilisation of sand dunes using calcium bentonite

    Sand dunes movement in the Arabian arid area hinder land development, expansion of city limits, and diversely affects rural roads, farms, irrigation, and grazing. Early attempts to curb sand movement used agriculture schemes required continuous supply of water; chemical treatment poses environmental concerns. Studies were conducted for sand dune fixation using agricultural and chemical means, but ...


    By Inderscience Publishers

  • GCL serves as cap in brownfield remediation site

    PROJECT: Patterson Plank Road Brownfield Remediation LOCATION: Patterson, New Jersey PRODUCTS: BENTOMAT® SDN BACKGROUND: This New Jersey brownfield was formerly the site of a chemical recycling facility. CHALLENGE: The soil at the site was heavily contaminated, and off-site removal would have ...

  • Case study - pumping bentonite

    Location: Germany Year: 2009 Working Context description The project is the construction of a big commercial and residential area in northern Germany during foundations phase. Diaphragm walls and Cut Off Walls are a techniques for the construction of permanent or temporary in-situ impermeable barriers. In order to stabilize side walls bentonite ...


    By Dragflow S.r.l.

  • 1 g Small-Scale Modelling of Saturated Cohesive Soils

    This paper describes the use of 1 g small-scale models composed of weak, saturated clay mixtures to investigate the response of natural clay deposits to underlying base rock fault displacements. A 3:1 mixture of kaolinite and bentonite at water contents between 150 and 100% produces a material with undrained shear strengths on the order of 1 to 2.5 kPa and well-scaled stress deformation behavior ...


    By ASTM International

  • Characteristics of a Bentonite Slurry as a Sealant

    Many of the technologies that relate to groundwater use bentonite slurries. The results of a laboratory investigation aimed at determining the characteristics of a bentonite slurry as a sealant are presented herein. Slurry indicator tests were used to determine the physical characteristics of the slurry, and performance tests, such as hydraulic conductivity and model tests, were conducted to ...


    By ASTM International

  • Influence of Soil Structure on the Stress-Strain Behavior of Sand-Bentonite Mixtures

    The influence of soil structure on the behavior of clay-rich mixtures has been examined. Mixtures of sand and bentonite, known as buffer, have been studied to determine their suitability for nuclear fuel waste containment. Triaxial tests have been performed on compacted specimens to determine the strength and constitutive behavior of the buffer. Two techniques were followed in preparing ...


    By ASTM International

  • Activation thermodynamics of virus adsorption to solids

    The kinetics of bacteriophage MS2, T2, and f2 adsorption to powdered nitrocellulose and disrupted Seitz S1 filters at pH 7 were determined as a function of temperature. Data from these studies were combined with data produced in a previous study on MS2 adsorption to clay by Stagg et al. (Appl. Environ. Microbiol. 33:385-391, 1977). These workers studied the adsorption of MS2 to bentonite clay as ...

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