Binding of Heavy Metals to Derivatives of Cholesterol and Sodium Dodecyl Sulfate

Ahmadi, S.; Huang, Yi-Chu; Batchelor, Bill; Köseoglu, S. S.

doi:10.1061/(asce)0733-9372(1995)121:9(645)

Cited by 27 publications

(7 citation statements)

References 7 publications

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“…MEUF was first used in the treatment of heavy metals in wastewater in the 1970s [5], and it has since been found that MEUF can be used to separate almost all heavy metal ions, including Cd 2+ , Ni 2+ , Zn 2+ , Cr 3+ , Mn 2+ , Pb 2+ , CrO 4 3− , Fe 3+ , Cu 2+ , and Fe(CN) 6 3− [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The surfactants used in MEUF range from single ionic surfactants, such as sodium dodecyl sulfate (SDS), cetyltriethylammnonium bromide (CTAB), dichloroacetic acid (DCA), trichloroacetic acid (TCA), sodium salt of 2-(2-carboxyethyl)-3-decyl maleic anhydride (DCMA-3Na), tetradecyl trimethyl ammonium bromide (TTAB), and polyoxyethylene nonyl phenyl ether (PONPE) [20][21][22][23][24][25][26], to mixed surfactants, such as SDS and polyoxyethylene octyl phenyl ether (Tritonx-100), SDS and polyoxyethyleneglycol dodecyl ether (Brij35), and SDS and nonylphenol ethoxylated (NPE) [27,28]. Small flat-panel ultrafiltration membranes, hollow ultrafiltration membranes, and spiral-type ultrafiltration membranes are all used in MEUF.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of surfactant micelles and Cd2+/Zn2+ in micellar-enhanced ultrafiltration

Huang

Zeng

Zhou

et al. 2010

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Adsorption of surfactant micelles and Cd2+/Zn2+ in micellar-enhanced ultrafiltration

Huang

Zeng

Zhou

et al. 2010

Journal of Hazardous Materials

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“…To our knowledge, there are no reports of bile salts specifically conferring zinc stress in other bacteria. However, the secondary bile acid deoxycholic acid can form organometallic complexes with zinc and other heavy metals which may make them unavailable for import, potentially affecting gene expression in many enteric bacteria [40–43]. E. coli O157:H7 is reported to increase expression of iron acquisition genes when exposed to bile, but repress key virulence genes including shiga toxin and the locus of enterocyte effacement [44].…”

Section: Discussionmentioning

confidence: 99%

A link between zinc uptake, bile salts, and a capsule required for virulence of a mastitis-associated extraintestinal pathogenicEscherichia colistrain

Grimsrud

et al. 2020

Preprint

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21Extraintestinal pathogenic Escherichia coli (ExPEC) are major causes of urinary and 22 bloodstream infections. ExPEC reservoirs are not completely understood. Some mastitis-23 associated E. coli (MAEC) strains carry genes associated with ExPEC virulence, including metal 24 scavenging, immune avoidance, and host attachment functions. In this study, we investigated the 25 role of the high-affinity zinc uptake (znuABC) system in the MAEC strain M12. Elimination of 26 znuABC moderately decreased fitness during mouse mammary gland infections. The znuABC 27 mutant strain exhibited an unexpected growth delay in the presence of bile salts, which was 28 alleviated by the addition of excess zinc. We isolated znuABC mutant suppressor mutants with 29 improved growth of in bile salts, several of which no longer produced the K96 capsule made by 30 strain M12. Addition of bile salts also reduced capsule production by strain M12 and ExPEC 31 strain CP9, suggesting that capsule synthesis may be detrimental when bile salts are present. To 32 better understand the role of the capsule, we compared the virulence of mastitis strain M12 with 33 its unencapsulated kpsCS mutant in two models of ExPEC disease. The wild type strain 34 successfully colonized mouse bladders and kidneys and was highly virulent in intraperitoneal 35 infections. Conversely, the kpsCS mutant was unable to colonize kidneys and was unable to 36 cause sepsis. These results demonstrate that some MAEC may be capable of causing human 37 ExPEC illness. Virulence of strain M12 in these infections is dependent on its capsule. However, 38 capsule may interfere with zinc homeostasis in the presence of bile salts while in the digestive 39 tract. 40 41 42 43

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“…Using surfactants SDS, CTAB (cetyl trimethyl ammonium bromide) and Tx-100 (Triton X-100), Mohammad and Jabeen (2003) studied the separation of heavy metal cations on soil amended silica gel layers. SDS has also been shown to be most effective in the micellar-enhanced ultra filtration (MEUF) method for heavy metal removal from water (Ahmadi et al 1995).…”

Section: Soil Pollutant Removal By Surfactants and Complexing Agentsmentioning

confidence: 99%

Surfactant-Enhanced Removal of Cu (II) and Zn (II) from a Contaminated Sandy Soil

Ramamurthy

et al. 2007

Water Air Soil Pollut

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Batch tests were conducted to know the effectiveness of using surfactants only and surfactants with a complexing agent to remove Cu (II) and Zn (II) from an artificially contaminated sandy soil. SDS (sodium dodecyl sulfate), AOT (alpha-olefin sulfonate) and Tx-100 (Triton X-100) were the surfactants selected as the washing liquids. Complexing agent EDTA (ethylenediaminetetraacetic acid) was also selected for washing the soil. To avoid external factors from interfering with the cleaning process, artificial soil formed by a mixture of clean sand and bentonite was used to form contaminated soil samples. The amount of organic matter present was insignificant. Compared to extraction by distilled water, tests indicated that a six-fold increase in copper extraction occurred due to the presence of surfactants and/or the complexing agent EDTA. Compared to extraction by distilled water, zinc extraction by surfactants and or the complexing agent EDTA was nearly 1.2 to 1.3 times more. Effects of competition as well as interference associated with the adsorption and desorption of these metals are also very briefly reported.

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Binding of Heavy Metals to Derivatives of Cholesterol and Sodium Dodecyl Sulfate

Cited by 27 publications

References 7 publications

Adsorption of surfactant micelles and Cd2+/Zn2+ in micellar-enhanced ultrafiltration

Adsorption of surfactant micelles and Cd2+/Zn2+ in micellar-enhanced ultrafiltration

A link between zinc uptake, bile salts, and a capsule required for virulence of a mastitis-associated extraintestinal pathogenicEscherichia colistrain

Surfactant-Enhanced Removal of Cu (II) and Zn (II) from a Contaminated Sandy Soil

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