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Satisfactory separation of aluminosilicates from diaspore was achieved by reverse flotation. Introduction. ... The NH 4 + adsorption capacity is however strongly mineral-dependent and follows the order of vermiculite ≈ montmorillonite ≫ illite > kaolinite ≈ chlorite.
The covering of aimed minerals by kaolinite and montmorillonite is an important factor leading to poor flotation selectivity. Organic inhibitors with small molecular weights can significantly ...
The interaction energies of the heterogeneous surfaces of montmorillonite (Mnt) and kaolinite (Kln) for saturates adsorption were determined by molecular simulation to be −1698.88 ± 0.67 (001 ...
DOI: 10.1016/j.cis.2007.12.008 Corpus ID: 46326374; Adsorption of a few heavy metals on natural and modified kaolinite and montmorillonite: a review. @article{Bhattacharyya2008AdsorptionOA, title={Adsorption of a few heavy metals on natural and modified kaolinite and montmorillonite: a review.}, author={Krishna G. …
Na–montmorillonite (Na–Mt) and kaolinite as low-cost adsorbent were performed to remove thallium(I) from aqueous solutions, and their adsorption behavior toward Tl(I) was evaluated. The adsorption of Tl(I) was strongly ionic strength and pH-dependent. Pseudo-first-order and pseudo-second-order models fitted well with the …
Tailings are by-products of the separation of economic minerals and consist of gangue particles, chemical reagents, and processing water. While the coarse fraction of tailings settles rapidly, ... Clay minerals are phyllosilicates, including kaolinite, illite, and montmorillonite [12]. They often have great hydrophilicity and high ...
The o/d ratio was the main factor that controlled the fine clogging behavior at pore throats. The critical clogging o/d ratios of Wyoming bentonite, kaolin I, and kaolin II were 2.52, 10.21, and 15.23, …
Both montmorillonite and kaolinite have negative sites on the basal faces owing to isomorphic substitution and amphoteric sites on the edge faces [16]. The amphoteric sites are conditionally charged and pH dependent because either a net positive or net negative charge can develop due to proton adsorption.
Extensive deposits of kaolinite in Florida are formed by transformation of montmorillonite during low-temperature supergene weathering. The transformation occurs by …
Changes in the site density and surface acidity constants (i.e. pKa1 and pKa2) of kaolinite and montmorillonite were determined after acid or alkali spills, and pH buffering capacity was evaluated ...
The present work investigates the removal of Cu(II) ions from an aqueous solution by kaolinite, montmorillonite, and their poly(oxo zirconium) and …
The results showed a gradual separation for montmorillonite in contrast to the relatively abrupt separation of kaolinite. The separation time for montmorillonite was 15 …
It is widely acknowledged that clay minerals have detrimental effects on the process of flotation, but the mechanisms involved are still not fully understood. In this work, the effects of …
The pick-up, migration, deposition, and clogging behaviors of fine particles are ubiquitous in many engineering applications, including contaminant remediation. Deposition and clogging are detrimental to the efficiency of environmental remediation, and their mechanisms are yet to be elucidated. Two-dimensional microfluidic models were …
tribution and the separation of the coarsest particle from montmor-illonite particles [11, 23, 24]. In this way, the ultrasonic treatment and the centrifugation methods showed the high yielding for separ-ation of montmorillonite [23]. The best montmorillonite separation in the size fractionslowerthan 2 μm was obtained by centrifugation
The magnetic separation, centrifugation and sizing methods can be applied to extract the montmorillonite (fraction < 2 μm ) and remove quartz and kaolinite impurities .
The kinetics data was fitted by using Eq. (4) and the fitting results are also shown in Fig. 2.Smaller value of the separation selectivity index k (16.4) and the worst selectivity were observed for coal-montmorillonite system. Not only flotation recovery but also selectivity for coal-montmorillonite system is lower than that of coal-kaolinite …
to kaolinite and the gro wth of kaolinite betw een the musco vite (Ms) cleav ages. B) SEM images of quartz being replaced by kaolinite, C) TEM image of single crystals of k aolinite.
The covering of aimed minerals by kaolinite and montmorillonite is an important factor leading to poor flotation selectivity. Organic inhibitors with small molecular weights can significantly improve this phenomenon. We selected nine kinds of organic carboxylate inhibitors with small molecules, and the stable adsorption conformations and …
Montmorillonite with chemical formula (Na,Ca) 0.3 (Al,Mg) 2 Si 4 O 10 (OH) 2n (H 2 O) is a very soft phyllosilicate group of minerals was first described in 1847 for …
According to the obtained data, lead(II) ions have stronger affinity for montmorillonite surface than kaolinite one. The Pb adsorbed amount on montmorillonite, for heavy metal initial concentrations 1, 10 and 100 ppm, equals: 2.3, 11.7 and 53.7 mg/g, whereas for kaolinite the Γ parameter is equal to 0.08, 0.72 and …
Semantic Scholar extracted view of "Kaolinite and montmorillonite as adsorbents for Fe(III), Co(II) and Ni(II) in aqueous medium" by K. Bhattacharyya et al.
The results have shown that kaolinite, montmorillonite and their poly(oxo zirconium) and tetrabutyl-ammonium derivatives could be used as adsorbents for …
Kaolinite was successfully tested as an adsorbent for the removal of arsenic from two contaminated groundwater samples containing arsenic in the range 1.36–1.41 mg/L and the shift in isoelectric point indicated that adsorption involves inner sphere surface complexation and strong specific ion adsorbed.
the montmorillonite content was increased from 15 to 84% with the separation yield of 80%. The influence of centrifugal force and the type of ultrasonication indicated the most …
For a particular separation process, the requirement for choosing membrane materials is complicated and includes longevity, mechanical reliability in operational conditions, efficiency and quality of separation [].Mixed matrix membranes (MMMs) consist of a polymer matrix that has been filled with different inorganic …
The abrupt separation curves for kaolinite produced a peak, as opposed to the gradual separation curve for montmorillonite for maximum adhesion (horizontal dashed line in Fig. 7). As anticipated from Gouy–Chapman theory, the nature and thickness of the diffuse double layer (DDL) surrounding the clay particles control the attraction …
Adsorption capacity (K F) of OP by soil minerals followed the trend kaolinite < montmorillonite < goethite ≪ Gibbsite (Table 1), showing a marked variability between the adsorption capacities of the tested soil minerals. The Fe and especially Al oxides exhibited the highest maximum adsorption capacity for all OP forms.
Kaolinite - also includes dickite and nacrite; ... Montmorillonite The most common smectite is Montmorillinite, with a general chemical formula : (1⁄2Ca,Na)(Al,Mg,Fe) ... also expansible; that is, the separation between individual smectite sheets varies with the amount of water present in the soil. Because of this, they are
brane preparation techniques to further develop the performance of montmorillonite MMMs in gas separation. Keywords Polymer · Montmorillonite · Clay · Mixed matrix membrane · Gas separation ... showing the incorporation of low-cost kaolinite in the fabrication of ceramic mem-branes for gas separation purposes [21]. Hydrotalcite clay ...