leaching and adsorption for bentonite competitive

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Adsorption of aniline and toluidines on montmorillonite ...

Jan 01, 1992· Bentonite clay liners are commonly employed to mitigate the movement of contaminants from waste disposal sites. Solid and liquid waste materials that arise from the production of shale oil contain a vast array of organic compounds. Common among these compounds are the aromatic amines. in order to ...

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Competitive adsorption of toxic metals on bentonite and ...

Competitive adsorption of toxic metals on bentonite and use of chitosan as flocculent coagulant to speed up the settling of generated clay suspensions Ferhat, M. Kadouche, S.

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Acid Activated Clay Adsorption Properties

May 13, 2017· Acid Activated Clay Adsorption Properties. Acid Treatment of Bentonite: Under the influence of a mineral acid the exchangeable alkaline earth ions of bentonite are substituted by hydrogen ions. Moreover, depending on the acid concentration, temperature, pressure and reaction time, a more or less pronounced leaching process takes place. Thereby ...

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Isotherm, Kinetics and Thermodynamics of Cu(II) and Pb(II ...

Mar 01, 2021· The leaching process uses strong acids and reducing agents for enhanced recovery of metal ions from solid samples. Recently, reductive acid leaching, using sulfuric acid as the leaching agent and hydrogen peroxide as the reductant, was used to extract manganese from groundwater treatment sludge, wherein Mn recovery was achieved .

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This beak disappeared with SAB because of leaching of ...

SPE-194719-MS 7 Figure 3—FTIR spectra of working clay samples, (A) NB, (B) HAB, and (C) SAB. Batch Investigation OM adsorption from crude phosphoric acid has been investigated by using Na-bentonite (nature bentonite), NB, and different acid activated bentonite clays, including H 2 SO 4 activated bentonite (SAB) and HCl activated bentonite (HAB). The effect …

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Superior Competitive Adsorption Capacity of Natural ...

Mar 18, 2021· Results revealed that bentonite is an excellent sorbent for the elimination of these dyes with maximum adsorption capacities of 598.8, 929.7 and 875.2 mg g −1 for , CV, and FB, respectively. In addition, thermodynamic results reflected that the adsorption …

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Adsorption behavior of Zn(II) onto natural minerals in ...

The results show that the adsorption process can be best described as the pseudo-second order kinetic model. The adsorption equilibrium data of bentonite and kaolinite can be respectively fitted best by Langmuir and Freundlich models. Thermodynamic studies display that the adsorption of Zn(II) onto clays is non-spontaneous and endothermic.

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(PDF) Competitive adsorption characteristics of Na(I)/Cr ...

Dec 18, 2014· The competitive adsorption of Na(I)/Cr(III) and Cr(III)/Cu(II) on GMZ bentonite was studied by batch experiments. The results show that the bentonite has larger total adsorption amount of Cu(II ...

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Adsorption and Leaching Behavior of Copper, Zinc and Lead ...

The present study was carried out to investigate the adsorption and leaching behavior of Cu2+, Zn2+ and Pb2+ by sediments collected from the western banks of three different sectors along River Nile at Aswan governorate, Egypt. The feasibility of sediments for the removal of Cu2+, Zn2+ and Pb2+ from aqueous solutions was tested under the effect of three conditions (pH, …

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Acid Activated Bentonite TR 3.3.2016

Technical Evaluation Report Acid-Activated Bentonite Livestock March 3, 2016 Page 3 of 13 89 Use instructions for Poultry Guard® state that 2an application rate of 50 lbs/1,000 ft should be used in ideal 90 situations (e.g., when litter is less than a year old, with cake being taken out in between flocks), and a rate

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1. Introduction - Hindawi

The removal of phenol from aqueous solutions by adsorption using surfactant-modified bentonite and kaolinite Journal of Hazardous Materials 2009 169 1-3 324 332 2-s2.0-67649804647 10.1016/j.jhazmat.2009.03.153 52 Numluk P. Chaisena A. Sulfuric acid and ammonium sulfate leaching of alumina from Lampang clay E-Journal of Chemistry 2012 9 3 …

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Batch and Continuous Systems for Zn, Cu, and Pb Metal Ions ...

Spent mushroom compost biochar (SMCB) was prepared by carbonization and tested for the removal of heavy metals (Zn(II), Cu(II), and Pb(II)) by adsorption. The sorption of heavy metals was evaluated by studying several factors, such as the initial solution pH, contact time, temperature, and individual and competitive adsorption. Kinetic and equilibrium studies were …

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Synergistic modification of bentonite by acid activation ...

Apr 01, 2020· Among them, adsorption is very competitive for separating pollutants from water bodies with the advantages of easy operation, relatively low cost and recyclability. Bentonite has been considered to be a promising adsorbent because of its lamellar structure, high cation exchange capacity, and low price with resource abundance (Pereira et al. 2017).

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Adsorption of Iron(II) from Acid Mine Drainage ...

Feb 09, 2016· Digestion, toxicity characteristic leaching procedure (TCLP), and batch adsorption tests using coal bottom ash (BA), bentonite clay (BC), and coal fly ash (FA) were performed. Apart from elucidating the effects of adsorbent dose and initial Fe(II) concentrations on the maximum adsorption capacity ( q e ) of the adsorbents, the experimental data ...

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Insight into the Adsorption and Photocatalytic Behaviors ...

Feb 04, 2020· The modification of bentonite by the different chemical and physical processes including alkaline treatment, acid leaching, thermal treatment, polymer intercalation, and organic modifications resulted in hybrid materials of high basal spacing, high surface area, and high adsorption capacities and having more active functional groups and high ...

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Study of Montmorillonite Clay for the Removal of Copper ...

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 …

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Enhancement of the adsorption properties of two natural ...

The textural properties of the raw bentonite clays and the prepared adsorbents were determined by N 2 adsorption–desorption at –196°C using a Micromeritics Tristar 3020 instrument. The samples were previously outgassed overnight at 160°C under a …

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Bentonite and anthracite in alginate-based controlled ...

In this research, bentonite and anthracite have been used as modifying agents in alginate-based CRFs prepared with chloridazon and metribuzin. These CRFs have been evaluated in a calcareous soil. The Kf and Koc values obtained from sorption experiments in soil have demonstrated a high leaching potential for both herbicides, mainly for metribuzin.

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Adsorption of Procion Red on Natural Bentonite : Kinetic ...

Abstract: Adsorption of procion red on natural bentonite was studied by kinetic study to know the reactivity of procion red. Kinetic adsorption was determined using batch adsorption system at various times in several concentrations of procion red. Time of adsorption was investigated at 5, 10, 20, 30, 45, 60, 90, and 120 minutes in 10, 25, 50, and 75 mg/L of procion red.

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Adsorption of silver from aqueous solution onto pre ...

In this work, thermally modified bentonite clay (Verde-lodo) was used for batch adsorption of silver from aqueous solution. The adsorption rate was evaluated by a kinetics study based on the following models: pseudo-first order, pseudo-second order, intra-particle diffusion, Mass Transfer in External Film and Boyd model.

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Original Research pH, Ionic Strength, and Ion Competition ...

including competitive effects, due to the presence of two or more adsorbates or the presence of sorption sites with different affinities, have also been proposed [16, 18]. In this study, a Na-bentonite from northern Patagonia in Argentina was utilized to investigate its potential as a low-cost adsorbent for the adsorption of Ni(II) and

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ELIMINATION OF TOXIC ELEMENTS BY NATURAL AND SYNTHETIC ...

Oct 30, 2019· Kinetics, thermodynamics and isotherm parameters of uranium (VI) adsorption on natural and HTDMA-intercalated bentonite and zeolite. Desalination and Water Treatment, vol. 127, pp. 272-281. [8] Kooner, Z.S. (1993). Comparative study of adsorption behavior of copper, lead and zinc onto goethite in aqueous system.

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Bentonite surface modification and characterization for ...

Mar 30, 2016· Phosphate adsorption from urban wastewater by modified bentonite exhibited affinity of removal of more than 99% at the concentration of 4.15 mg P/L. Tian et al. ascribed the reduction in phosphate adsorption from yellow phosphorus industry wastewater by lanthanum/aluminum pillared montmorillonite to the competitive effect of concomitant anions.

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(PDF) Competitive sorption and desorption of arsenate and ...

Competitive sorption and desorption of arsenate and uranium on bentonite and kaolinite. Broder Merkel. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. READ PAPER. Competitive sorption and desorption of arsenate and uranium on bentonite and kaolinite.

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Competitive Fixed-Bed Adsorption of Pb(II), Cu(II), and Ni ...

Fixed-bed adsorption studies using chitosan-coated bentonite (CCB) as adsorbent media were investigated for the simultaneous adsorption of Pb(II), Cu(II), and Ni(II) from a multimetal system. The effects of operational parameters such as bed height, flow rate, and initial concentration on the length of mass transfer zone, breakthrough time, exhaustion time, and adsorption …

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BATCH STUDIES FOR THE INVESTIGATION OF THE …

Both soil and bentonite showed significant difference with TEB (1.48) at (p≤0.05). CEC were 3.91cmol/kg and 6.81cmol/kg in soil and bentonite. Low CEC in soil could be attributed to leaching while higher CEC in bentonite could be attributed to presence of montmorillonite. CEC in soil and bentonite were significant (1.62) at (p≤0.05).

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(PDF) Application of bentonite modified with L-Histidine ...

The adsorption rate of bentonite-histidine is greater than that of natural bentonite at high concentration of metals due to the structure of bentonite-histidine. Chemical modification by amine coupling agents may be a useful tool for the preparation of new adsorbents with high adsorption capaci- ties and selectivity towards metal ions retention ...

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Adsorptive removal of tetracycline by sustainable ...

Feb 19, 2020· The existence of NaCl (or CaCl 2) decreases the adsorption capacity of TC onto Ben/Rm/Ps-op, which may be due to the competitive effect between Na + (or Ca 2+) and TC on the adsorption sites.

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Adsorption Technique for the Removal of Organic Pollutants ...

Jan 30, 2013· 2. Adsorption phenomenon. Adsorption is a surface phenomenon with common mechanism for organic and inorganic pollutants removal. When a solution containing absorbable solute comes into contact with a solid with a highly porous surface structure, liquid–solid intermolecular forces of attraction cause some of the solute molecules from the solution to be …

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Application of modified clay for removal of phenol and ...

Apr 27, 2017· The maximum adsorption capacity of hexadecyltrimethylammonium–bentonite was 18.8 mg/g for phenol and 38.5 mg/g for phosphate(V) at simultaneous adsorption of both of them. The optimal pH values of adsorption on hexadecyltrimethylammonium–bentonite was found to be 7.0 and >7 for phosphate(V) and phenol, respectively.

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Preparation of Chitosan/Calcium Alginate/Bentonite ...

Jun 07, 2021· by FTIR, XRD and SEM. Adsorption performances of the hydrogel toward Pb2+, Cu2+ and Cd2+ in water under different condition as well as multi-ion competitive sorption were investigated. The adsorption processes were described with the canonical adsorption kinetics and isotherms models.

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Journal of American Science 2012;8(8) ...

Bentonite clay has been used for the adsorption of phenol from aqueous solutions over a concentration range of 10–100 mg/l, shaking time of 5–120 min, stirring rate from 50-250 r.p.m and adsorbent dosage from 0.1to 0.5 g. The Experiments were carried out for the analysis of adsorption equilibrium capacities using a batch equilibrium technique.

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