Adsorption of polyacrylamides on mineral oxides: Effect of ...
In the coal reverse flotation, it was found that polyacrylamides (molecular weight of 1.5 × 10 6 g·mol −1) with up to 50% degree of anionicity are effective flocculants of fine coal, while conditioning (1500 rev/min) with polyacrylamides of a lower degree of anionicity lead to the selectively flocculated smaller flocs of coal and gangue particle...
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SELECTIVE ADSORPTION OF ANIONIC POLYACRYLAMIDE ONTO ...
Abstract: To study the selectivity of polyacrylamide in the selective floc flotation of fine coal, adsorption of anionic polyacrylamide (PAM A401) onto ultra-low ash coal and kaolinite was studied, including the
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Adsorption of anionic polyacrylamide onto coal and ...
In the coal reverse flotation, it was found that polyacrylamides (molecular weight of 1.5 × 10 6 g·mol −1) with up to 50% degree of anionicity are effective flocculants of fine coal, while conditioning (1500 rev/min) with polyacrylamides of a lower degree of anionicity lead to the selectively flocculated smaller flocs of coal and gangue particle...
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Adsorption of Anionic Polyacrylamide onto Coal and Kaolinite ...
In the coal reverse flotation, it was found that polyacrylamides (molecular weight of 1.5 106 g mol 1) with up to 50% degree of anionicity are effective flocculants of fine coal, while conditioning (1500 rev/min) with polyacrylamides of a lower degree of anionicity lead to the selectively flocculated smaller flocs of coal and gangue particles [13].
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Selective adsorption of anionic polyacrylamide onto ultra-lo ...
To study the selectivity of polyacrylamide in the selective floc flotation of fine coal, adsorption of anionic polyacrylamide (PAM A401) onto ultra-low ash coal and kaolinite was studied, including the adsorption thermodynamics, floc size distribution and wettability changes. The thermodynamics...
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... selectivity of fine coal from kaolinite by anionic ... ...
Selective adsorption of anionic polyacrylamide onto ultra-low ash coal and kaolinite 739 macromolecular network (Mao et al., 2010). On average, clays account for 60–80% of the total impure minerals in coal (Xu et al., 2003). Kaolinite, as the most common 2 O 3
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Selective adsorption of anionic polyacrylamide onto ultra-lo ... 簡
To study the selectivity of polyacrylamide in the selective flocculation flotation of fine coal, the adsorption of anionic polyacrylamide (PAM A401) onto ultra-low ash coal and kaolinite was studied, including the adsorption thermodynamics, floc size distribution and ...
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Highly efficient and selective removal of anionic dyes from ...
Selective adsorption of anionic polyacrylamide onto ultra-low ash coal and kaolinite 739 macromolecular network (Mao et al., 2010). On average, clays account for 60–80% of the total impure minerals in coal (Xu et al., 2003). Kaolinite, as the most common 2 O 3
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Adsorption of anionic polyacrylamide onto coal and kaolinite ...
ABSTRACT The wettability of floc has a large effect on the selective flocculation flotation process of fine coal separation. The changes of thermodynamic characterization of coal and kaolinite have been investigated by Washburn dynamic method and Fourier transform infrared spectroscopy (FTIR) before and after the adsorption of anionic polyacrylamide. Lipophilic hydrophilic ratio (LHR), surface ...
Get PriceIs polyacrylamide adsorption on iron oxide selective?
Polyacrylamide adsorption on iron oxide is selective over silica as a function of pH. The adsorption of polyacrylamide on magnetite and hematite was compared. Anionic polyacrylamide adsorbed more strongly to iron oxide at low pH. Anionic polyacrylamide adsorption exceeded that of neutral polyacrylamide at low pH.
Can polyacrylamide adsorption be quantified at different pH values?
In this work, the adsorption of different molecular weight polyacrylamides onto iron oxides and silica was quantified at different pH values. Mineral oxides were characterised by zeta potential, particle size distribution, scanning electron microscopy images and X-ray diffraction.
Does molecular weight affect adsorption capacity of polyacrylamide?
All three polyacrylamides had similar adsorption capacity on the iron oxides particles, thus minimal influence of molecular weight was observed. The adsorption isotherms were fit to the Langmuir model to facilitate interpretation of the adsorption mechanism.
Does anionic polyacrylamide adsorb more strongly to iron oxide at low pH?
Anionic polyacrylamide adsorbed more strongly to iron oxide at low pH. Anionic polyacrylamide adsorption exceeded that of neutral polyacrylamide at low pH. Acrylamide-based polymers such as polyacrylamide (PAM) and their derivatives are widely used as additives to enhance solid-liquid separation in the mineral processing industry.
Does cationic polyacrylamide have effective flocculant behaviour?
They concluded that cationic and anionic polyacrylamide showed effective flocculant behaviour at pH 6 and pH 11 respectively. Leet and Somasundaran studied adsorption of neutral polyacrylamide (MW 700 kg/mol) on a series of mineral oxides including Fe 2 O 3, Cr 2 O 3, Al 2 O 3, TiO 2, SnO 2 and SiO 2 (Leet and Somasundaran, 1989).
Does polyacrylamide behave at oxide-aqueous solution interfaces?
Acrylamide-based polymers such as polyacrylamide (PAM) and their derivatives are widely used as additives to enhance solid-liquid separation in the mineral processing industry. Thus, an investigation of polyacrylamide behaviour at oxide-aqueous solution interfaces is of vital importance.
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