Quantitative desorption of humic substances from Amberlite XAD resins with an alkaline solution of sodium dodecyl sulfate

Sorouradin, Mohammad-Hussein; Hiraide, Masataka; Kim, Young-Sang; Kawaguchi, Hiroshi

doi:10.1016/0003-2670(93)85354-m

Cited by 19 publications

(7 citation statements)

References 13 publications

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“…6 The adsorption recovery was determined by comparing the absorbances of the original sample and the column effluent.…”

Section: Adsorption Of Humic Substances On Amberlite Xad-2mentioning

confidence: 99%

“…The humic substances were then desorbed with an alkaline solution of sodium dodecyl sulfate (SDS). 6 The anionic surfactant was essential for complete desorption, but appreciable amounts of SDS were found in the final humic solution.7 Unfortunately, an effective removal of the SDS has not yet been developed.The present paper describes a simple technique for the separation of humic substances from SDS molecules. An alkaline mixture of humic substances and SDS was passed through the XAD-2 resin column, on which the SDS was selectively and strongly retained, leaving the humic substances in the column effluent.…”

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confidence: 99%

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Effective Desorption of Humic Substances from Amberlite XAD-2 Resin with Sodium Dodecyl Sulfate

Hiraide

Uchitomi

1999

ANAL. SCI.

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Naturally occurring humic substances, the major organic constituents of river, lake and pond water, are structurally complex and polyelectrolytic compounds with varying functionalities. They are not well-defined substances, but can generally be divided into three fractions: humic acid, fulvic acid and humin. Humic and fulvic acids are known to interact with metal ions, hydrated metal oxides, clay minerals and organic compounds.1-3 They are also considered to be precursors of toxic halogenated compounds formed during the chlorination of water.4 Therefore, the study of aquatic humic substances is highly required in geochemistry, environmental sciences and water treatment. In most cases, however, the concentrations of humic and fulvic acids are too low to study them directly. Large volumes of water should therefore be treated for the collection of appreciable amounts of humic substances.In our laboratory, an effective enrichment technique was proposed by using coprecipitation-flotation in a flow system 5 , where humic and fulvic acids were coprecipitated with indium hydroxide and continuously floated to the solution surface with numerous nitrogen bubbles. The gathering precipitate was dissolved in hydrochloric acid, which was passed through an Amberlite XAD-2 resin column to separate humic substances from the indium carrier. The humic substances were then desorbed with an alkaline solution of sodium dodecyl sulfate (SDS). 6 The anionic surfactant was essential for complete desorption, but appreciable amounts of SDS were found in the final humic solution.7 Unfortunately, an effective removal of the SDS has not yet been developed.The present paper describes a simple technique for the separation of humic substances from SDS molecules. An alkaline mixture of humic substances and SDS was passed through the XAD-2 resin column, on which the SDS was selectively and strongly retained, leaving the humic substances in the column effluent. Experimental ApparatusA Shimadzu UV-180 spectrophotometer was used for the measurement of absorbances at 400 nm to determine humic substances. Because the absorptivity varied with the solution pH, each sample was always adjusted to pH 13 before the determination. A Retsch Model MM vibrating pulverizer was used for grinding XAD-2 resin with an agate vial (18 mm inner diam.×50 mm height) containing two agate balls (12 mm in diam.). All separation procedures were carried out on a Hitachi ECV-843 BY clean bench. ReagentsA humic acid solution (0.25 mg cm -3 ) was prepared by dissolving humic acid (extracted from peat soil, Nakarai Chemicals) in a 0.1 mol dm -3 sodium hydroxide solution and passing through 1.0 µm Nuclepore membrane filters. A fulvic acid solution (0.5 mg cm Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Japan The adsorption and desorption of humic and fulvic acids on a non-ionic macroreticular resin, Amberlite XAD-2, were studied from the view point of the concentration of aquatic humic substances. Microgram or milligram quantities of humi...

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“…6 The adsorption recovery was determined by comparing the absorbances of the original sample and the column effluent.…”

Section: Adsorption Of Humic Substances On Amberlite Xad-2mentioning

confidence: 99%

mentioning

confidence: 99%

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Effective Desorption of Humic Substances from Amberlite XAD-2 Resin with Sodium Dodecyl Sulfate

Hiraide

Uchitomi

1999

ANAL. SCI.

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“…Ways to overcome these problems include grinding of the particles to enlarge the accessible surface [5±7], the use of sodium dodecyl sulfate to improve elution [4], treatment of the resins with a solution of indium to occupy cation retaining sites [5], and the use of weak anion exchanging sorbents like diethylaminoethyl cellulose [15] or diethylaminoethyl-Sephadex A-25 [7,13] for extraction at higher pH values.…”

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confidence: 99%

Anion Exchange Solid Phase Extraction of Humic Substances for the Determination of Complexed Heavy Metals in Natural Waters with High Dissolved Organic Carbon Contents

Niessner

Buchberger

Bonn

1998

Monatshefte fuer Chemie

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A solid phase extraction material based on a copolymer of styrene and divinylbenzene was developed for the extraction of heavy metals complexed by humic and fulvic acids in water. The sorbent was synthesized by a modi®ed multistep activated swelling polymerization procedure; anion exchange functionalities were introduced by chemical modi®cation or by coating of the particle surface. These materials allowed the extraction of humic substances from water samples at their natural pH. The extract or the sorbent containing the humic substances was digested by dry ashing with sulfuric acid, and the metals Cu, Zn, Pb, and Cd were determined by differential pulse anodic stripping voltammetry. With this method, the four metals could be determined with recoveries between 87 and 99% at concentrations down to 50 ng/l.

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“…It is well known that organic matter undergoes effective adsorption on polymeric resin at an acid medium [24,25] but the potential reduction of Cr(VI) to Cr(III) in the presence of organic matter in an acidic medium must be taken into account. The pH 6.0 AE 0.1 is recommended to eliminate organic matter in the procedure of Cr(VI) determination [21].…”

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Ultraselective and Sensitive Determination of Cr(VI) in the Presence of a High Excess of Cr(III) in Natural Waters with a Complicated Matrix

Grabarczyk¹

2008

Electroanalysis

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In the present work, the catalytic adsorptive stripping voltammetric procedure for trace determination of Cr(VI) in the presence of a high excess of Cr(III) in natural waters with a complicated matrix has been developed. The influence from potentially interfering substances such as organic matter was successfully eliminated by exploiting adsorptive properties of polymeric resin. The detection limit estimated from 3 times the standard deviation for a low Cr(VI) concentration in the simultaneous presence of a 2 Â 10 3 fold excess of Cr(III), 50 mg L À1 surfactants, 50 mg L À1 humic substances and the accumulation time of 30 s was about 5.3 Â 10 À10 mol L À1.

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Quantitative desorption of humic substances from Amberlite XAD resins with an alkaline solution of sodium dodecyl sulfate

Cited by 19 publications

References 13 publications

Effective Desorption of Humic Substances from Amberlite XAD-2 Resin with Sodium Dodecyl Sulfate

Effective Desorption of Humic Substances from Amberlite XAD-2 Resin with Sodium Dodecyl Sulfate

Anion Exchange Solid Phase Extraction of Humic Substances for the Determination of Complexed Heavy Metals in Natural Waters with High Dissolved Organic Carbon Contents

Ultraselective and Sensitive Determination of Cr(VI) in the Presence of a High Excess of Cr(III) in Natural Waters with a Complicated Matrix

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