An intensive study has been made of the removal efficiency of Cu(II) from industrial leachate by biosorption of montmorillonite. A 2(4) factorial design and cascade forward neural network (CFNN) were used to display the significant levels of the analyzed factors on the removal efficiency. The obtained model based on 2(4) factorial design was statistically tested using the well-known methods. Th...

Acid–base chemistry of clay minerals is central to their interfacial properties, but up to now a quantitative understanding on the surface acidity is still lacking. In this study, with first principles molecular dynamics (FPMD) based vertical energy gap technique, we calculate the acidity constants of surface groups on (010)-type edges of montmorillonite and kaolinite, which are representatives...

Surface complexation modeling (SCM) has emerged as a powerful tool for simulating heavy metal adsorption processes on the surface of soil solid components under different geochemical conditions. The component additivity (CA) approach is one of the strategies that have been widely used in multicomponent systems. In this study, potentiometric titration, isothermal adsorption, zeta potential measu...

[1] We report on laboratory experiments examining the effect of hydration state on the frictional properties of simulated clay and quartz fault gouge. We tested four mixtures of Ca-montmorillonite and quartz (100, 70, 50, and 30% montmorillonite) at four hydration states: dry (<4.50 wt% water), one water interlayer equivalent (4.5–8.7 wt% water), two layers (8.7–16.0 wt% water), and three layer...

Among emerging pollutants, endocrine disruptors such as estradiol are of most concern. Conventional water treatment technologies not capable removing this compound from water. This study aims to assess a method that combines physicochemical and biological strategies eliminate even when there other compounds present in the matrix. Na-montmorillonite, Ca-montmorillonite zeolite were used remove m...

different amounts of nanoclay were incorporated into the acrylic resin matrix at 0, 1, 3, and 5 wt.% loadings. the coatings were applied on low carbon steel plates. optical microscopy, sedimentation test, transmission electron microscopy, and x-ray diffraction were employed to investigate the dispersion of nanoclay in matrix. the corrosion resistance of coatings was evaluated by electrochemical...

the external and interlamellar spaces of montmorilonite (mmt) were used as solid support for synthesis of cuo nanoparticles (nps) at room temperature by the chemical reduction method. in this project, copper nitrate plus water (cu(no3)2. xh2o) and sodium hydroxide (naoh) were used as copper precursor and reducing agent respectively. then, mmt/cu2+ nanocomposites were stabilized with different r...

Colloidal clay (montmorillonite) strongly inhibited the conjugal transfer of R-plasmid R1drd-19 in Escherichia coli. This finding is discussed in the context of the feasibility of plasmid transfer in environmental waters.

montmorillonite is the major mineral of bentonite with many applications in industrial fields but some impurities decreases the quality of the bentonite. the main objective of this study was to investigate the suitable method for purification of ghaen mine bentonite. a combination of methods was considered including wet sieving and sedimentation, centrifuge and ultrasound. the efficiency of pur...

Thermodynamic analysis of simultaneous and sequential adsorption of crystal violet (CV) and 2-naphthol adsorption on montmorillonite has been conducted, and the changes of microstructure of the clay after adsorption were investigated using X-ray diffraction (XRD). The basal spacing and structural order of CV and 2-naphthol adsorbed montmorillonites varied with different CV loadings. In principl...