A study of ion adsorption onto surface functionalized silica particles

Makavipour, Fatemeh; Pashley, Richard M.

doi:10.1016/j.cej.2014.09.046

Cited by 14 publications

(15 citation statements)

References 29 publications

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“…(4) and (5) arises directly from the electrostatic energy (at the surface of electrostatic potential 0 ) of the charged surface groups (SCOO − and SPO 4 − ) and not from the conversion of the bulk hydrogen ion concentration [H B + ] to the corresponding surface concentration, as suggested in a recent analysis of surface charging [18]. The bulk hydrogen ion concentration, for dilute solutions, defines the chemical potential of the hydrogen ions in bulk solution and also close to the (charged) cell surface, if the system is at equilibrium.…”

Section: Surface Charging With Phmentioning

confidence: 94%

A study of the surface charging properties of a standard strain of Escherichia coli (ATCC 11775) in aqueous solutions

Xue

Pashley

2015

Colloids and Surfaces B: Biointerfaces

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Section: Surface Charging With Phmentioning

confidence: 94%

A study of the surface charging properties of a standard strain of Escherichia coli (ATCC 11775) in aqueous solutions

Xue

Pashley

2015

Colloids and Surfaces B: Biointerfaces

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“…By comparison, the mixture of tert ‐dodecyl mercaptan and C 14 –TAB showed modest (14%) adsorption of arsenic from 5 mg L −1 solution (after 30 min) with significant foaming and carryover (10%). This suggests that the thiol group has a significant role in arsenic adsorption in cysteine, as arsenic cannot be adsorbed onto the quaternary ammonium groups . The Quat surfactant was added to produce foaming, as the mercaptan alone did not foam.…”

Section: Resultsmentioning

confidence: 99%

“…[6] In this study, L-cysteine has been used as the adsorbent due to its natural amino acid structure and its existence in high-level protein food and also the known interaction of its sulfhydryl groups with arsenic, through which it binds arsenic to specific proteins. [1b] In addition, L-cysteine has been used as prereductant of As(V) to As(III) successfully in the literature [7] and also there has been successful reports for arsenic removal from water using cysteine coated silica microparticles [8] and also on cysteine itself. [9] It has been reported [1b] that several cysteine molecules are required to bind to each arsenic ion species and hence it seems reasonable to assume that capture of arsenic onto cysteine groups bound to a solid substrate, which has been observed, [8] might be enhanced by using a more fluid source of the cysteine groups.…”

Section: Doi: 101002/gch2201700047mentioning

confidence: 99%

“…[1b] In addition, L-cysteine has been used as prereductant of As(V) to As(III) successfully in the literature [7] and also there has been successful reports for arsenic removal from water using cysteine coated silica microparticles [8] and also on cysteine itself. [9] It has been reported [1b] that several cysteine molecules are required to bind to each arsenic ion species and hence it seems reasonable to assume that capture of arsenic onto cysteine groups bound to a solid substrate, which has been observed, [8] might be enhanced by using a more fluid source of the cysteine groups. This could be achieved using surfactants with cysteine head-groups adsorbed at the water-air interface that is, adsorbed onto a bubble surface.…”

Section: Doi: 101002/gch2201700047mentioning

confidence: 99%

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Low‐Level Arsenic Removal from Drinking Water

2018

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The reported ability of cysteine and cystine to bind typical arsenic oxy‐ions in water is used as a basis for a study of the potential for using a surfactant with a cysteine head‐group for selective arsenic binding and removal in an ion flotation process. Several different head‐group attachment methods are studied with cysteine and cystine and with single‐ and double‐chain surfactants. A comparison of the properties of these surfactants with some other surface‐active compounds, with groups like those on cysteine, suggest that few compounds have suitable characteristics for the efficient removal of low levels of arsenic from drinking water. An amino‐acid‐based single‐chain surfactant is synthesized by reacting cysteine with octanoyl chloride to obtain octanoyl cysteine, which is then used in a study of selective ion flotation for the removal of low levels of arsenic from drinking water. This compound has high water solubility and causes extensive foaming in a typical flotation chamber and removed 99.4–99.9% of the 5 mg L −1 arsenic present in the contaminated water in a simple, single‐stage ion flotation process, using either air or nitrogen gas. These laboratory results indicate that these surfactants can be useful in the large‐scale treatment of low‐level arsenic‐contaminated water.

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“…Silica as the reinforcement could significantly improve the mechanical properties for rubber industry . However, the presence of abundant silanols group could result in strong silica‐silica interaction . Hence, the conventional silica‐reinforced rubber usually exhibited high aggregation and uneven dispersion in the rubber matrix due to strong filler‐filler interaction.…”

Section: Introductionmentioning

confidence: 99%

Hybrid of bamboo charcoal and silica by tetraethoxysilane hydrolysis over acid catalyst reinforced styrene‐butadiene rubber

Lee

et al. 2018

J of Applied Polymer Sci

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The hybrid of bamboo charcoal (BCC) and silica‐reinforced styrene‐butadiene rubber was prepared by a modified sol–gel method of hydrolyzing tetraethoxysilane over an acid catalyst. The fracture surface of the samples after tensile test was characterized by field emission‐scanning electron microscopy. The tensile strength, storage modulus, hardness, friction coefficient, and swelling test were discussed based on the samples with or without 3‐(methacryloxy) propyl trimethoxy silane modification. The results showed that the storage modulus clearly increased with the increasing of silica contents among the hybrid of BCC and silica‐reinforced samples. The storage modulus of the sample decreased after modification by 3‐(methacryloxy) propyl trimethoxy silane, indicating the improvement of the filler in SBR matrix. The tensile stress and the hardness both increased with the increasing of silica contents in the SBR matrix. Besides, the friction coefficient and the swelling ratio for the hybrid of BCC and silica‐reinforced SBR decreased with the decreasing of BCC contents in SBR matrix. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46219.

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A study of ion adsorption onto surface functionalized silica particles

Cited by 14 publications

References 29 publications

A study of the surface charging properties of a standard strain of Escherichia coli (ATCC 11775) in aqueous solutions

A study of the surface charging properties of a standard strain of Escherichia coli (ATCC 11775) in aqueous solutions

Low‐Level Arsenic Removal from Drinking Water

Hybrid of bamboo charcoal and silica by tetraethoxysilane hydrolysis over acid catalyst reinforced styrene‐butadiene rubber

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