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Adsorption of naphthalene onto sonicated talc from

2010-6-1  The adsorption behavior of naphthalene onto naturally hydrophobic talc from aqueous solution was investigated in this study. The natural talc was first pretreated by sonication to improve the surface characteristics and enhance the uptake capacity by increasing the specific surface area (SSA) of talc.

Pitch adsorption on natural and modified talcs v3 final

2015-11-24  Pitch adsorption on natural and modified talcs A. Tijero*, M.C. Monte, A. Blanco, C. Negro and J. Tijero Chemical Engineering Department. Complutense University of Madrid. Avda. Complutense, s/n. 28040 Madrid (Spain) [email protected] Abstract Talc is used traditionally for pitch control in papermaking. The effectiveness of talcs as

Adsorption Performance of Talc for Uranium Removal

Adsorption of uranyl ions onto talc from aqueous solutions was investigated in batch adsorption experiments. The study has been conducted to investigate the effects of the pH of solution, contact

New amino-inorganic hybrids from talc silylation and

Request PDF New amino-inorganic hybrids from talc silylation and copper adsorption properties The aminated trialkoxysilanes were immobilized on natural talc mineral surface. The obtained

Comparing colloidal pitch adsorption on different talcs

2017-2-3  Among others, adsorption onto talc is well correlated in this work to the Langmuir model. Adsorption mechanisms for the other minerals are explained by proposing different models, but without discussing hydrophobic forces. Oleic acid adsorption is furthermore compared with triolein adsorption on

Influence of pH on the adsorption of dissolved and

2017-2-3  deposition, Adsorption, Adsorption isotherm, Paper-making, Pitch control agents, Colloids. SUMMARY: Talc is often used to control unwanted deposition of resins and wood processing derivatives in the wet end circuit of a paper mill. The effect of pH was studied on the adsorption of

New amino-inorganic hybrids from talc silylation and

2001-1-1  The softness of talc is also due the easy displacement of these layers, rendering the material a poor electrical and thermal, refractory behavior and resistant to acids. The attractive forces between the sheets give to the matrix a non-expansible characteristic, and consequently, the chemical reactivity is limited to modifications on surface .

Organic contaminants in recycled paper: a model study of

2017-2-3  ween the cationic talc and the often anionic organic parti-cles typical in stickies (Biza 1999). However, in this study the investigated talc grade did not contain cationic dispersants so as to identify the dominant hydrophobic interactions. An obvious problem in understanding the interactions with talc and other minerals is the extreme chemical

Adsorption of Dextrin and Guar Gum onto Talc. A

2019-5-25  The adsorption process is governed by hydrogen bonding as well as chemical interaction between the polysaccharides and the surface metal hydroxide groups of talc. The better depressant activity of guar gum may be attributed to its more favorable cis-configuration of the hydroxyl groups as opposed to the trans-hydroxyl groups of dextrin, apart

Determination of the surface sorption properties of

Adsorption constants of a diverse set of organic vapors have been measured on NaCl, KNO3, (NH4)2SO4, NH4Cl, kaolinite, bentonite. and talc at different relative humidities at 15 degrees C. Together with the earlier studied quartz (SiO2), CaCO3, and alpha-Al2O3, these surfaces represent relevant sorbents for organic vapors in the environment.

Talc (Mg3H2(SiO3)4) Registration Dossier ECHA

The estimated adsorption coefficient was 31.82 L/kg (log Koc 1.5027) Executive summary: The log of the adsorption coefficient (KOC) of Talc (Mg3H2(SiO3)4) was estimated to be log KOC = 1.5027 which is equal to a KOC value of 31.82 using the KOCWIN v2.00 QSAR method.

Adsorption Performance of Talc for Uranium Removal

Adsorption of uranyl ions onto talc from aqueous solutions was investigated in batch adsorption experiments. The study has been conducted to investigate the effects of the pH of solution, contact

Synthesis Fe3O4/Talc nanocomposite by coprecipition

2020-10-28  The adsorption is the process of chemical and exothermic. These results permit us to conclude that Fe 3 O 4 /Talc nanocomposite is a promising low-cost adsorbent for Cr(VI) removal from wastewater and can be applied in a magnetically-assisted water treatment technology.

Treatment of Talc in a Solvent Gane, Patrick A. C.

Talc is a common magnesium silicate mineral having the chemical formula Mg 3 Si 4 O 10 (OH) 2. It occurs as foliated masses having an extraordinary basal cleavage, the resulting folia being non-elastic, although slightly flexible. It is sectile and very soft, with a hardness of 1, thus being the softest on the Mohs' scale of mineral hardness.

Study on the Modification Experiment of Talc as Filter Aid

faster, the contact area and probability of reacting will increase, the chemical adsorption consequently is more sufficient. Therefore, the purity and hydrophobicity of talc filter aid will increase, and then the performances of filtration will be better. So the optimal modified temperature was choose at 80°C. 0 5 10 15 20 25 0 50 100 150 200

Talc substances having specific surface properties and

1995-3-28  The invention relates to talc substances consisting of particles having a sheet structure. These substances are characterised in that each particle has internally the crystalline structure of talc which confers upon it certain specific properties of this mineral (softness, thermal stability) and has hydrophilic surface properties unlike the hydrophobic properties of mineral talc which give

Adsorption and conformation of carboxymethyl cellulose

2005-12-16  hydrophobic interaction, hydrogen bonding, chemical and electrostatic interactions. However, the reasons for the selec-tivity of its adsorption on minerals has not been accounted for. Steenberg et al. [11,12] and Ralston et al. [13] proposed that the adsorption of polysaccharide on talc occurs mainly at the basal planes via hydrophobic force.

Polypropylene Chemical Resistance Guide HMC Polymers

2012-7-12  chemical resistance are reported in this downloadable PDF which is periodically updated. The chemical resistance data presented in this PDF for a range of over 260 chemicals and substances is based on ASTM D543. Testing Unstressed resin specimens are used measuring 76mm (3”) long x 0.635mm (0.025”) thick, in the shape of dumbbells.

What is talc? Eurotalc

2 天前  Talc's adsorption properties, i.e. adsorbing onto the surface only, are key in a number of applications, particularly pitch control in paper making where talc is used to absorb organic impurities (pitch, unwanted anions) which are sticky. Talc also greatly improves printing runnability.

Synthesis Fe3O4/Talc nanocomposite by coprecipition

2020-10-28  The adsorption is the process of chemical and exothermic. These results permit us to conclude that Fe 3 O 4 /Talc nanocomposite is a promising low-cost adsorbent for Cr(VI) removal from wastewater and can be applied in a magnetically-assisted water treatment technology.

Talc (Mg3H2(SiO3)4) Registration Dossier ECHA

The estimated adsorption coefficient was 31.82 L/kg (log Koc 1.5027) Executive summary: The log of the adsorption coefficient (KOC) of Talc (Mg3H2(SiO3)4) was estimated to be log KOC = 1.5027 which is equal to a KOC value of 31.82 using the KOCWIN v2.00 QSAR method.

Talc (Mg3H2(SiO3)4) Registration Dossier ECHA

Based on the hazard assessment of Talc (Mg3H2(SiO3)4), in section 2.1 and 2.2. in IUCLID 6., available data for the substance and following the “Guidance on Information Requirement and Chemical Safety Assessment R.8. Characterisation of dose [concentration]- response for human health”, according to the EU’s list of dangerous substances

Adsorption and conformation of carboxymethyl cellulose

2005-12-16  hydrophobic interaction, hydrogen bonding, chemical and electrostatic interactions. However, the reasons for the selec-tivity of its adsorption on minerals has not been accounted for. Steenberg et al. [11,12] and Ralston et al. [13] proposed that the adsorption of polysaccharide on talc occurs mainly at the basal planes via hydrophobic force.

Talc substances having specific surface properties and

1995-3-28  The invention relates to talc substances consisting of particles having a sheet structure. These substances are characterised in that each particle has internally the crystalline structure of talc which confers upon it certain specific properties of this mineral (softness, thermal stability) and has hydrophilic surface properties unlike the hydrophobic properties of mineral talc which give

Synthesis of cyclic carbonates from epoxides and

2020-10-20  The observed chemical composition of talc is comparable to that reported for naturally occurring talc deposits from Lamal Pougue, Cameroon .However, it should be noted that every talc deposit is unique with regard to chemistry and morphology due to variations in geological formation .The elemental composition data for the vermiculite sample used in the study presented in Table 1, show

Removal of zearalenone toxin from synthetics gastric

Adsorption kinetics of zearalenone (ZEA) toxin from synthetic gastric fluid (SGF) and synthetic body fluid (SBF) by talc and diatomite was studied in the batch experiments. Chemical composition, morphology and structure of the used adsorbents were examined by scanning electron microscopy, FTIR spectroscopy and low-temperature nitrogen

Soils Developed from Dolomitic Shale in the Yichang

Recently, the problem of phenolic organics pollution has become increasingly serious. More and more strategies have been developed to remove phenolic organics from water, including oxidation, adsorption, chemical precipitation, etc. Among them, adsorption technology has attracted great attention due to its advantages of high efficiency, simplicity and easy operation.

Polypropylene Chemical Resistance Guide HMC Polymers

2012-7-12  chemical resistance are reported in this downloadable PDF which is periodically updated. The chemical resistance data presented in this PDF for a range of over 260 chemicals and substances is based on ASTM D543. Testing Unstressed resin specimens are used measuring 76mm (3”) long x 0.635mm (0.025”) thick, in the shape of dumbbells.