Adsorption characteristics of traces of silver on selected surfaces

West, Foymae K.; West, Philip W.; Iddings, Frank A.

doi:10.1016/s0003-2670(01)80645-0

Cited by 35 publications

(7 citation statements)

References 1 publication

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“…The potential for metals to interact with MPs has been largely overlooked as plastics surfaces are considered to be relatively inert to aqueous metal cations (Ashton et al, 2010;Holmes et al, 2012). However, the adsorption of metal ions by plastic containers has been reported in ecotoxicological studies (Giusti et al, 1994;Fischer et al, 2007) and silver (Ag, used in the present study as a model metal contaminant), in particular, exhibits strong surface-binding characteristics which requires recognition and mitigation in experimental design (West et al, 1967;Sekine et al, 2015). Commonly used plastic pellets, including polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC), deployed in the San Diego Bay area for up to one year accumulated different amounts of nine metals, with some metals (including Ni, Zn and Pb) not reaching saturation within the given timeframe (Rochman et al, 2014).…”

Section: Introductionmentioning

confidence: 98%

Influence of polyethylene microplastic beads on the uptake and localization of silver in zebrafish (Danio rerio)

Khan

Syberg

Shashoua

et al. 2015

Environmental Pollution

221

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Section: Introductionmentioning

confidence: 98%

Influence of polyethylene microplastic beads on the uptake and localization of silver in zebrafish (Danio rerio)

Khan

Syberg

Shashoua

et al. 2015

Environmental Pollution

221

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“…After studying somewhat different ions in hard water, Eicholz et al (2) reported that it was preferable to use borosilicate glass, rather than polyethylene, to minimize container ion adsorption. Adsorption of silver by containers appears to vary with concentration, pH, contact time with the container, composition of dissolved salts, type of containers, and complexing agents (3)(4)(5)(6)(7).…”

Section: Resultsmentioning

confidence: 99%

“…The method required the prior removal of solids and carbonate, was lengthy, and gave unsatisfactory accuracy and precision. Others have used dihydroxytartaric acid-2,4-dinitrophenyloxazone (Alkalone) and its analogs as an indicator in the photometric titration (7), and as a reagent for the spectrometric determination (8) for hydroxide and alumina using Technicon equipment. These procedures gave varying success.…”

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confidence: 99%

Thermometric titration determination of hydroxide and alumina in Bayer process solutions

VanDalen¹,

Ward²

1973

Anal. Chem.

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The apparatus determines from 10 to 600 grams/l. hydroxide and from 3 to 120 grams/l. alumina in Bayer Process streams. Essential components include a constant rate buret, a glass enclosed thermistor, and a specially designed operational amplifier circuit which by generating the first derivative' of the thermistor signal, detects the end point and stops the titration. The sample is diluted with sodium tartrate and titrated with 1 . 3 N HCI in a thermos jar. The first titration volume is equivalent to hydroxide; after the addition of potassium fluoride, the second titration volume is equivalent to alumina. The complete titration takes 4 minutes. Suspended solids do not interfere, neither do other constituents in Bayer liquors. The relative standard deviation is 0.32% for hydroxide at the 180 grams/l. level, and 0.17% for alumina at the 120 grams/l. level.Good analytical values for hydroxide and alumina are needed to efficiently operate the Bayer Process, in which hot sodium hydroxide is used to dissolve the alumina from bauxite to give a concentrated solution of alumina. Impurities such as iron oxide, titania, and sand are left behind as insolubles, commonly referred to as red mud. After filtering off the red mud, the dissolved alumina is recovered from the filtrate by allowing it to cool, and then seeding it with aluminum hydroxide. About one half of the alumina precipitates out by this procedure. The Bayer Process control strategy involves constant measurement of the concentrations of hydroxide, which in North America is traditionally ( I ) expressed as grams/l. NaZC03, and of alumina, which is expressed as grams/l. A1203. In some cases the ratio of the alumina to hydroxide concentrations is used for process control. This ratio is related to the degree of saturation of the solution; it has values of less than 0.5 for saturated solutions, and values up to 0.7 for supersaturated solutions, which are fed to the precipitators.Thermometric titrations have been used to determine caustic ( 2 ) and alumina (3) in 2-or 3-component solutions. These methods are not well suited for routine, process control analyses, since the titration must be continued beyond the equivalence point, and a strip chart recording of the titration curve must be inspected to locate the end point. Zenchelsky and Segatto ( 4 ) were the first to point out that thermometric titration curves can be differentiated. They demonstrated this by mechanical amplification of the bridge signal followed by differentiation of the amplified signal in a resistance-capacitance network. Later, a much simpler operational amplifier circuit ( 5 ) was used to generate the first and second derivatives 1 Present address, Aluminum Company of Canada, Limited, Kitimat, British Columbia, Canada.

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“…However, from the data presented here, mercury loss in both 2-5% nitric and hydrochloric acids did not occur in all storage bottles examined. West et al (6,7) studied the optimum storage for trace silver in aqueous solution, and they found that it was necessary to complex the silver in the sample with sufficient sodium thiosulfate to ensure less than 1% adsorption to containers over a 30-day storage period. In the present work, trace silver was not adsorbed to all bottles examined over an 80-day storage period.…”

Section: Concentration Variation During Storage Of Aqueous Solutionmentioning

confidence: 99%

“…Rosain and Wai (4) and Coyne and Collins (5) investigated the loss of mercury in aqueous solution for various storage bottles. West et al (6,7) studied adsorption of silver on container surfaces. Pacer (8) and King et al (9) studied adsorption of cadmium from aqueous solution to storage bottles.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Concentration Variations of Trace Elements during Storage and Handling of Solution by Neutron Activation Analysis

Lee¹,

Lee

1999

Microchemical Journal

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Adsorption characteristics of traces of silver on selected surfaces

Cited by 35 publications

References 1 publication

Influence of polyethylene microplastic beads on the uptake and localization of silver in zebrafish (Danio rerio)

Influence of polyethylene microplastic beads on the uptake and localization of silver in zebrafish (Danio rerio)

Thermometric titration determination of hydroxide and alumina in Bayer process solutions

Investigation of Concentration Variations of Trace Elements during Storage and Handling of Solution by Neutron Activation Analysis

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