Adsorption of cationic cetylpyridinium chloride on pyrite surface

Bae, Sungjun; Mannan, M. B.; Lee, Woojin

doi:10.1016/j.jiec.2012.02.010

Cited by 36 publications

(6 citation statements)

References 36 publications

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“…Little attention has been instead paid to sulphide NCs, though some contribution focus on both their synthesis [261][262][263][264][265][266][267] as well as on their surface chemistry [152,262,[268][269][270][271][272][273].…”

Section: The Surface Of Transition Metal Sulphides: Bulk and Nanocrysmentioning

confidence: 99%

“…However, the nanoparticles were quickly oxidised when coming in contact with air, turning the black suspension into a yellowish-orange coloured solution. In a further paper, adsorption of cetylpyridinium chloride (CPC), a cationic surfactant, on pyrite surface was investigated in its suspension, showing a CPC adsorption capacity dependence upon pH [268] (see Figure 10). Zeta potential of pyrite surface changed from positive to negative value by the addition of NaCl.…”

Section: Iron Sulphidementioning

confidence: 99%

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Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

2017

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Abstract:Metal sulphides, and in particular transition metal sulphide colloids, are a broad, versatile and exciting class of inorganic compounds which deserve growing interest and attention ascribable to the functional properties that many of them display. With respect to their oxide homologues, however, they are characterised by noticeably different chemical, structural and hence functional features. Their potential applications span several fields, and in many of the foreseen applications (e.g., in bioimaging and related fields), the achievement of stable colloidal suspensions of metal sulphides is highly desirable or either an unavoidable requirement to be met. To this aim, robust functionalisation strategies should be devised, which however are, with respect to metal or metal oxides colloids, much more challenging. This has to be ascribed, inter alia, also to the still limited knowledge of the sulphides surface chemistry, particularly when comparing it to the better established, though multifaceted, oxide surface chemistry. A ground-breaking endeavour in this field is hence the detailed understanding of the nature of the complex surface chemistry of transition metal sulphides, which ideally requires an integrated experimental and modelling approach. In this review, an overview of the state-of-the-art on the existing examples of functionalisation of transition metal sulphides is provided, also by focusing on selected case studies, exemplifying the manifold nature of this class of binary inorganic compounds.

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Section: The Surface Of Transition Metal Sulphides: Bulk and Nanocrysmentioning

confidence: 99%

Section: Iron Sulphidementioning

confidence: 99%

Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

2017

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“…In few cases is the assumption of a bilayer necessary to respect physical adsorption limits with the surfactants and minerals reported. For the case of Bae's (2012) pyrite data, a maximally-dense bilayer was assumed in order to calculate the minimum physical specific surface area (SSA), which is so high (35m2/g) that oxidation of the author's coarsely-sieved pyrite is suggested. As the SSA of colloidal hydrous ferrous oxides (HFO) can exceed 200 m 2 /g, the MPA may be much higher than this physical minimum.…”

Section: Literature Adsorption Valuesmentioning

confidence: 99%

“…Rinsing with NaHCO 3 reduces P550 adsorption by about half, or that corresponding to a dense monolayer. Levitt et al (2015) propose the hypothesis that high levels of adsorption reported on pyrite in the literature (Bae, 2012) are due to rapid oxidation, yielding either a higher SSA, more positive surface charge, or both. This is suggested as a mechanism by which oxidation increases the adsorption of anionic surfactants over relatively short time spans.…”

Section: Hydrous Ferrous Oxide (Hfo)mentioning

confidence: 99%

Adsorption of EOR Chemicals Under Laboratory and Reservoir Conditions, Part III: Chemical Treatment Methods

Levitt

Bourrel

2016

All Days

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This is the final installment in a series of three papers examining iron mineralogy and its effect on surfactant adsorption in reservoir and outcrop rock samples. The goal of these studies is to establish best practices for obtaining surfactant adsorption values representative of those in a reduced oil reservoir, despite performing experiments in an oxidizing laboratory atmosphere.This article follows two others examining the abundance and form of iron in the reservoir and in core samples (Part I: Levitt et al., 2015), and a proposed core restoration technique utilizing iron-reducing bacteria (Part II: Harris et al., 2015). In this Part III, chemical reduction methods are examined.Surfactant retention is a leading uncertainty in economic forecasting of chemical EOR, in large part due to the order-of-magnitude effects of artifacts such as improper core preservation. The industry standard is to (a) limit atmospheric contact of cores to the extent feasible, and (b) when necessary, reduce oxidized cores using strong reducing agents such as sodium dithionite, along with buffering and chelating agents such as sodium bicarbonate and EDTA or sodium citrate. However few studies have been performed to determine whether such invasive treatments are necessary, or what unintended effects the use of such reactive chemicals may have.The most striking conclusion from these studies is the lack of clear evidence of any advantage of electrochemical reduction versus a simpler treatment with chelators such as sodium citrate or EDTA. Wang (1993) suggests that oxidation of reservoir cores leads to higher surfactant adsorption due to the reduction of clays, which yields a more negative surface charge. Static experiments with montmorillonite clay, as well as an oxidized outcrop containing significant clay and iron content, illustrate that rinsing with non-reducing agents such as sodium bicarbonate, EDTA, or sodium citrate can lower adsorption as much as a strong reducing agent such as sodium dithionite. In the case of montmorillonite, cation exchange appears to be the mechanism by which adsorption is lowered, and so NaCl alone is sufficient to lower adsorption to near-zero values. For the iron-and clay-containing outcrop material, initial measurements indicating ЉadsorptionЉ far in excess of a dense bilayer were due in fact to the precipitation of sulfonate surfactant with calcium, which eluded from the dissolution of small amounts of anhydrite. An alkyl alkoxy sulfonate surfactant showed higher calcium tolerance, and did not yield ЉmultilayerЉ adsorption when equilibrated with the anhydrite-containing core sample.While treatment with a citrate-bicarbonate-dithionite solution does indeed lower adsorption several-fold further, solutions of either sodium bicarbonate or EDTA are at least as effective, and sodium citrate is almost as effective. These non-reductive treatments remove small amounts (~0.1% -~0.2% of rock mass) of Fe and Al, and fines are invariably apparent in treatment fluids, both of which suggest removal of small amounts of t...

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“…A kutatá-sok zöme a vegyület különféle tiszta ásványi őrleményeken történő megkötődését vizsgálja (LAW & KUNZE, 1966;MALIK et al, 1972;SLADE et al, 1978;PATZKÓ & DÉKÁNY, 1996;BAE et al, 2012;MA et al, 2013).…”

Section: B Evezetésunclassified

Kationos felületaktív anyag (hexadecilpiridinium-klorid monohidrát) adszorpciója talajokon

Barna

Földényi

Tóth

et al. 2015

Agrokem

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B evezetésA felületaktív anyagok vagy tenzidek kettős karakterű anyagok: egy hidrofil fejrészből és egy hidrofób láncból állnak, ez utóbbi legtöbbször egy hosszú alkillánc (10-20 szén atomból) (PATZKÓ, 1998). Attól függően, hogy milyen a hidrofil rész, ionos és nem ionos csoportra oszthatóak; az ionoson belül pedig megkülönböztethe-tünk anionos és kationos tenzideket.Felületaktív anyagok legtöbbször a szennyvizek révén jutnak a környezetbe és a talajba; de számos növényvédő szer, műtrágya is tartalmaz tenzidet (tapadásfoko-zók, vagy formázó szerek, pl. emulgeáló adalékanyagok).A felületaktív anyagok adszorpciója/megkötődése a talajon függ: 1. e vegyületek tulajdonságaitól (pl. oldhatóság, kémiai szerkezet, a poláris láncrész hossza), 2. a talaj és a talajoldat összetételétől (szerves anyagok, agyagásványok, vasoxidok mennyisége, az agyagásványok töltéssűrűsége stb.) és egyéb jellemzőitől (pl. a kationcsere kapacitás, kémhatás, hőmérséklet) (LAW et al

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Adsorption of cationic cetylpyridinium chloride on pyrite surface

Cited by 36 publications

References 36 publications

Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

Adsorption of EOR Chemicals Under Laboratory and Reservoir Conditions, Part III: Chemical Treatment Methods

Kationos felületaktív anyag (hexadecilpiridinium-klorid monohidrát) adszorpciója talajokon

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