Abstract. Membrane science is a state-of-the-art environmentally green technology that ascertains superior advantages over traditional counterparts for CO 2 capture and separation. In this research, mixed matrix membranes (MMMs) comprising cellulose acetate (CA) with various loadings of bentonite (Bt) clay were fabricated by …Web
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In this work we verify, by different experimental methods, the efficiency of this wet separation process for removing impurities in a raw bentonite mineral, and at the …Web
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In the present study, the adsorptive potential of modified bentonite in a batch system for the removal of aniline and phenol from aqueous solutions was investigated. The effect of various parameters including contact time (10–120 min), pH (2–10), adsorbent dosage (0.4–1.5 g/L) and initial concentration of aniline and phenol (50–200 mg/L) was …Web
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Multifunctional nano-cellulose aerogel for efficient oil–water separation: Vital roles of magnetic exfoliated bentonite and polyethyleneimine. Author links open overlay panel Rui Tang a, Shiqi Xu c, Ya Hu a, ... the stability of Fe 3 O 4 but also allowed the organic functional group of PEI to effectively participate in the adsorption process ...Web
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Although, bentonite chemical composition varies from one place to another place []. The bentonite clay is often extracted from open pit mines with different deposit depths and many impurities. Therefore, bentonite purification is an important process, which is an expensive and complex procedure for separation of montmorillonite.Web
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Different separation process types have been studied for bentonite clay purification. At this point, it is worth mentioning that hydrocyclones are designed to separate solid particles over a size range of 4 to 500 μm (Towler and Sinnott, 2013).Web
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3.2 Characterization of raw and activated bentonite clays. The BET analysis of raw and treated bentonite indicated that the surface area was increased by treating raw bentonite with 0.5 M H 2 SO 4 whereas calcination reduced the pore surface area. Narrowing of the hysteresis curve of the adsorption isotherm (Fig. 1) was an indication of …Web
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The presence of emerging pollutants such as hazardous chemicals, pharmaceuticals, pesticides, and endocrine-disrupting chemicals in water sources is a serious concern to the environment and human health. Thus, this study focused on exploring the interaction mechanisms between ciprofloxacin (CIP) (antibiotic) and clay (a low-cost …Web
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Bentonite was used as adsorbent, which was modified by aluminum cross-linking and tannin double modification (Al-Tan-Bent), and the adsorbent has excellent removal performance for ammonia nitrogen (NH 4 +-N) from low temperature wastewater.In the experiments, the effects of adsorbent dosage, pH, contact time, and coexisting ions …Web
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Since this ROM bentonite is already an appropriate sample for industrial use, no acid/alkaline activation process was applied to the hydrocyclone products to improve the separation efficiency as reported by Hassan and Abdel-Khalek (1998). The different characteristics of hydrocyclone products are discussed below.Web
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The purification process includes grinding, dispersion and centrifugal separation. The raw bentonite was ground firstly for a certain time with an universal grinder. Then 3 g grounded bentonite was suspended in 36 g deionized water with about 0–0.06 g (NaPO 3) 6, respectively 0%, 0.5%, 1%, 1.5%, 2% of the bentonite mass, and …Web
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The process will be conducted in three different conditions; 1) without the addition of bentonite, 2) with the pre-treatment using bentonite and 3) with the pre-treatment using bentonite and the addition of bentonite in the membrane solution, in order to determine which approach give the best results.Web
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The construction process of the composite membrane is shown in Fig. 1.MXene nanosheets were mixed with Na-Bentonite in a certain proportion and then subjected to the following high-temperature heat treatment: 10 mg of MXene and different amount of Na-Bentonite (20, 40, 60, 80 mg) were dispersed in 40 mL of DI water and …Web
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Effective separation of a Na-bentonite sample by multistage hydrocyclone was reported in our earlier study (Boylu et al., 2010). However, few studies have been reported on directly modifying raw clay, then removing impurities and unmodified clay for the production of high purity organoclay.Web
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Separation of oily water using PVC membrane. ... the amount of bentonite leached out from the membrane matrix during the phase inversion process is less than 5.9 mg L −1. Also, the amount of Aam-g-bentonite leached out is less than that of unmodified bentonite at all concentrations, indicating that the stability of modified bentonite in the ...Web
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This paper aims to review the state-of-the-art purification techniques and determination methodologies for PAHs in comprehensive food samples. Different extraction methodologies and analytical ...Web
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Using a dynamic separator for the first time as beneficiation equipment for bentonite. Evaluation by particle size distribution and X-ray diffraction analysis. …Web
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Figure 3 shows a schematic diagram of the bentonite slurry mixing and treatment process. The bentonite used was a sodium-activated bentonite with the trade name Berkbent 163. ... The effectiveness of the solid–liquid separation process was evident on site as the centrate was near-clear water and the solid discharge had a soft …Web
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In general, the chemical nature of the contaminants is not altered during the separation process. (2) Conversion treatment changes the chemical nature of pollutants through chemical or biochemical effects. ... was 64.1%. Galambo et al. used bentonite and montmorillonite to adsorb 137 Cs in radioactive wastewater, and the maximum adsorption ...Web
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Bentonite clay is a mined product. Usually, two types of bentonite, sodium and Calcium based, are found in our nature. Sodium-based bentonite is used for soil stabilisation work. For piling works, bentonite powder shall be mixed with water to make a slurry with specified parameters, and the bentonite slurry is used to stabilise the sides of …Web
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The separation and purification methods for bentonite can be divided into three types, namely picking, wind separation and wet separation. Picking. Picking is mainly used for bentonite with a high montmorillonite content in the raw ore. Picking is generally carried out at the mining site, where the waste rock is manually separated out from the ore.Web
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The magnetic bentonite can adsorb Cu 2+, Cd 2+, Mn 2+, and Cr 6+ and can be separated and recovered. The composite of graphene/graphene oxide bentonite can …Web
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The acid concentration of Ca-bentonite acidification process is higher than that of Na-bentonite acidification. The microwave activation method of bentonite has faster reaction rate and better modification effect. ... Magnetic bentonite composite can improve the solid–liquid separation ability of bentonite and improve the treatment effect of ...Web
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A novel tunable tragacanth gum-graft-poly (methyl methacrylate) bentonite (TG-g-PMMA/B) was synthesized by radical polymerization process in the presence of …Web
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11.25.1 Process Description1-4. Clay is defined as a natural, earthy, fine-grained material, largely of a group of crystalline hydrous silicate minerals known as clay minerals. Clay minerals are composed mainly of silica, alumina, and water, but they may also contain appreciable quantities of iron, alkalies, and alkaline earths.Web
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The interaction between graphene and bentonite enhances the property of the selective separation of the oil or water from the mixture. The membrane can be used to effectively separate water and oil from oil–water mixtures (>98% efficiency), with a high flux (625 Lm −2 h −1 ), high oil rejection ratio, and excellent recyclability for up to ...Web
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Different separation process types have been studied for bentonite clay purification. At this point, it is worth mentioning that hydrocyclones are designed to separate solid particles over a size range of 4 to 500 μm (Towler and Sinnott, 2013). ... being an alternative process for bentonite purification. This equipment has a low maintenance ...Web
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However, because of these properties of Na-type bentonite, the separation of bentonite from suspension is difficult, and it is necessary to dispose of bentonite suspensions by a solid-liquid separation process [[7], [8], [9]]. A coagulation precipitation method using a flocculant is well known as a solid-liquid separation process [1, 6].Web
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A bentonite with 44% montmorillonite from Anji Gaoyu, Zhejiang province, China, was purified adopting a simple method composed of grinding of raw bentonite, dispersion of ground bentonite in water with addition of some dispersant and centrifugal separation. Purified bentonite with montmorillonite content of 96.5% and …Web
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Synthesis of Bentonite/hydroxyapatite composite. In a particular method, 0.5 g HAp and 0.5 g bentonite were added in different beakers (250 mL) containing distilled water and stirred at room ...Web
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The bentonite suspension was prepared as follows: 500 g of fine bentonite sample was mixed with water (4 dm3) in 5 litre container. After mixing the suspension for ... packets in order to intensify the separation process [5] and also by the means of coagulation or flocculation process [6, 7] which allow the solid-phase particles to aggregate ...Web
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The application potential of bentonites increases with the Mt content and separation of associated gangue minerals such as opal, quartz, calcite, feldspars, iron …Web
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By performing a multiple response optimization on the designed experiment, the optimum condition for the destabilization and separation process that results in a zeta potential of -5.8 mV, a pH of 2.2, D 50 of 31.5 μm and a D 90 63.8 μm was found to be 77 mM and 3.48 g L −1 for the ChCl:LA dosage and the bentonite solid content, respectively.Web
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A dewatering method using PEO as a flocculant has been successfully used to dewater bentonite clay waste, coal-clay waste, and phosphate clay waste. In field tests, phosphate clay waste has been dewatered from 2.5 percent solids to greater than 20 percent solids. In other field tests, coal-clay-waste has been dewatered from 3 percent …Web
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