Treatment of effluent from manufacture of chlorinated pesticides with a synthetic, polymeric adsorbent, Amberlite XAD-4

Kennedy, David C.

doi:10.1021/es60074a008

Cited by 43 publications

(10 citation statements)

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“…Recently a nematic liquid crystal stationary phase has been found to be effective in separating isomeric chlorinated biphenyls (1, 2), though excessive bleeding from these columns may cause problems. Liquid chromatography has been used by a few workers, and a definitive paper on high-speed liquid chromatography of polychlorinated biphenyls appeared recently (3). The authors of this paper used 5-µ silica gel as the absorbent and dry hexane as the solvent, with detection by ultraviolet absorption at 205 nm.…”

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confidence: 99%

Amberlite XAD copolymers in reversed phase gravity flow and high pressure liquid chromatography

Pietrzyk¹,

Chu²

1977

Anal. Chem.

102

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Rigidly porous Amberlite XAD copolymers with large surface areas were Investigated as packings for chromatographic applications and were shown to differ In adsorption power. Batch distribution coefficients and retention volumes (capacity factors) were determined for substituted benzenes, anilines, phenols, benzoic acids, sulfonic acids, and phenoxyacetlc adds at different experimental conditions. Variables that influence the Interactions between organic molecules and the copolymers Include: pH, type and concentration of organic solvent mixed with water or with other organic solvents, type, number, and position of substituents In the organic molecule, and the concentration of added electrolyte. Electrolyte and pH are the most significant variables for organic acids and bases. These data provide a basis for choosing eluting conditions and adsorbent for separation, stripping, and concentrating applications In reversed phase gravity flow and high pressure liquid chromatography.The commercially available Amberlite XAD series of copolymers, which have large surface areas and rigid, near permanently porous structures, have been shown to be good adsorbents for a wide variety of organic compounds. Many examples are available in the literature which describe the removal of impurities in sugars, meat products, and water, and the isolation of steroids, carotenoids, toxic drugs, and other biologically important compounds from urine or blood, utilizing a stripping column usually made with XAD-2 macroparticles (1-7). XAD-2 stripping columns are now routinely used in screening urine for drugs of abuse (8-10). Recently, the use of XAD-2 for stripping drugs and related compounds from urine, blood, tissue samples, and stomach contents was reviewed (11). In general, the conditions utilized for stripping were derived empirically.The XAD copolymers have not been extensively used in analytical columns in liquid chromatography. Macro XAD-2 particles and gravity flow elution were used in the separation of chlorinated and nitrated phenol derivatives (1) while micro XAD-2 particles and high pressure elution were used in the separation of aniline and pyridine derivatives (12). Subsequently, XAD-7 columns were used to separate phenols (13) and IV-methyl anilines and methyl substituted phenols were separated on XAD-2 columns ( 14) by HPLC. The nature of the interaction between the XAD copolymers and organic compounds was also considered in these (1,(12)(13)(14) and other studies (15,16).In this report, experiments which demonstrate the significance of the parameters that influence the sorption of organic compounds on XAD columns, are described. These include: structure of the XAD copolymer and of the organic compounds being separated, pH, salt concentration, and type and concentration of the solvents in the eluting system. With these data it should be possible to predict optimum conditions for stripping and quantitative separations and to serve as a basis for suggesting other polymeric structures that might be useful as chromatographic packin...

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Amberlite XAD copolymers in reversed phase gravity flow and high pressure liquid chromatography

Pietrzyk¹,

Chu²

1977

Anal. Chem.

102

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“…They have been used to concentrate pesti cides and related compounds in raw and finished waters in a study of contamination of water supplies, 14 and they have been shown to be particularly advanta geous for removal of chlorinated pesticides from indus trial wastewater. 15 Regeneration was readily accom plished with acetone or isopropanol, and the spent regenerant could be reclaimed for reuse. This resin also adsorbs phenols, although its capacity is somewhat less than that of weak base resins.…”

Section: Adsorption On Resinsmentioning

confidence: 99%

Activated Carbon Versus Resin Adsorption of 2‐Methylisoborneol and Chloroform

Chudyk¹,

Snoeyink²,

Beckmann³

et al. 1979

Journal AWWA

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“…The resin, XAD-4, surpassed an active carbon of greater surface area both in terms of adsorptive capacity and elution efficiency.13 Furthermore, that work indicated an economic advantage of the XAD-4 with chemical regeneration over granular active carbon with thermal regeneration. 13 In contrast to carbon, the chemistry of the inert, nonactivated surface of the resin is well defined and easily varied.14 The addition of ion exchange functional groups to the macroreticular resin matrix provides the possibility of removing both organics and anions, the latter species being resistant to adsorption on carbon.1° The macroreticular resins evaluated in this project included a high-surface-area-neutral resin and two anion exchange resins-a weak base and a strong base.…”

Section: Adsorbentsmentioning

confidence: 99%

Waste management analysis for the nuclear fuel cycle. II. Recycle preparation for wastewater streams

Smith¹,

Navratil²,

Plock³

1979

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Treatment of effluent from manufacture of chlorinated pesticides with a synthetic, polymeric adsorbent, Amberlite XAD-4

Cited by 43 publications

References 0 publications

Amberlite XAD copolymers in reversed phase gravity flow and high pressure liquid chromatography

Amberlite XAD copolymers in reversed phase gravity flow and high pressure liquid chromatography

Activated Carbon Versus Resin Adsorption of 2‐Methylisoborneol and Chloroform

Waste management analysis for the nuclear fuel cycle. II. Recycle preparation for wastewater streams

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