منابع مشابه
The Effect of Electrolyte Concentration and Ph on the Flocculation and Rheological Behaviour of Kaolinite Suspensions
The effects of the electrolyte concentration and pH on the settling behaviour, floc sizes and rheological behaviour of kaolinite suspensions were investigated. The results show that the settling behaviour of kaolinite changes with the ionic strength and pH of the suspension. In the acidic pH range, (pH 2) particles settle in flocculated form regardless of electrolyte concentration, however, in ...
متن کاملEffects of Polymer Molecular Weight on Adsorption and Flocculation in Aqueous Kaolinite Suspensions Dosed with Nonionic Polyacrylamides
The effects of polyacrylamide (PAM) molecular weights (MWs) on the PAM adsorption capacities and PAM-mediated flocculation of kaolinite suspensions were investigated using a series of nonionic PAMs with different MWs. Adsorption tests using aqueous kaolinite suspensions dosed with a series of PAMs with MWs of 1.5 kg/mol, 10 kg/mol, 0.6–1 Mg/mol, 5–6 Mg/mol, and 18 Mg/mol (referred to as 1.5 K, ...
متن کاملStructure and Electronic Properties of Transition Metal Doped Kaolinite Nanoclay
In this work, a series of transition metal (Cr, Mn, Fe, and Co) doped kaolinite nanoclays were investigated by density functional theory (DFT) calculations. The influence of metal doping on geometric structure and electronic structure of kaolinite was analyzed. The ferromagnetic (FM), antiferromagnetic (AFM), and nonmagnetic (NM) states of transition metal (TM) doped kaolinite structures were s...
متن کاملThe structure of the kaolinite minerals FT-Raman study
AB S T R A C T : The Fourier transform Raman spectra of the kaolinite minerals have been measured in the 50-3800 cm -1 region using near infrared spectroscopy. Kaolinites are characterized by remarkably intense bands in the 120-145 cm -I region. These bands, attributed to the O-Si--O and O-A1-O symmetric bending modes, are both polymorph and orientation dependent. The 200-1200 cm -I spectral ra...
متن کاملChromate Adsorption by Kaolinite
Chromate (CrO4 2-) adsorption was investigated on kaolinite (0.2-2 ~m) saturated with NaC104 over a range of pH. Adsorption increased with decreasing pH because of protonation of chromate and/ or variable charge sites on kaolinite. Chemical pretreatment to remove noncrystalline and crystalline oxide contaminants affected the magnitude ofCrO42adsorption, but not the pH range over which CrO42adso...
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ژورنال
عنوان ژورنال: Journal of Colloid and Interface Science
سال: 2008
ISSN: 0021-9797
DOI: 10.1016/j.jcis.2008.08.063