Sorption of Anionic Metsulfuron-Methyl and Cationic Difenzoquat on Peat and Soil As Affected by Copper

Pei, Zhiguo; Shan, Xiao-quan; Wen, Bin; He, Bo; Liu, Tao; Xie, Yaning; Owens, Gary

doi:10.1021/es800807m

Cited by 25 publications

(23 citation statements)

References 26 publications

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“…Thus, it might be possible that by forming complexes with both functional groups of CNTs and organic solutes in the solution, heavy metal ions serve as bridging agents and therefore enhance the adsorption of organic molecules. This bridging effect of heavy metal ions has been reported for the enhanced sorption of anionic organic chemicals to soil organic matter and humic substances [19][20][21]. Furthermore, the specific effect of complexing metal ions likely is dependent on solution pH.…”

Section: þmentioning

confidence: 65%

Effect of copper ion on adsorption of chlorinated phenols and 1‐naphthylamine to surface‐modified carbon nanotubes

Wang

Zhu

Chen

2011

Enviro Toxic and Chemistry

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Understanding the adsorptive interactions between organic contaminants and carbon nanotubes (CNTs) is critical to both environmental applications and risk management of CNTs. The objective of the present study was to understand how transitional metal ions with strong complexing capabilities might affect the adsorption of hydroxyl- and amino-substituted aromatics to surface O-functionality-rich single-walled CNTs (O-SWNT) and N-functionality-rich single-walled CNTs (N-SWNT). Adsorption of 2,4-dichlorophenol, pentachlorophenol, and 1-naphthylamine to O-SWNT and N-SWNT can be significantly enhanced in the presence of Cu(II) (50 mg/L), whereas adsorption of 1,2-dichlorobenzene is essentially unaffected. The most likely mechanism for the Cu-enhanced adsorption is that Cu(II) serves as a bridging agent between organic solutes and the functional groups on CNT surfaces. For the adsorption of 1-naphthylamine to N-SWNT, an additional mechanism might be possible; that is, the complexation of Cu(II) with the N-functional groups of N-SWNT can change these groups from strong Lewis bases to Lewis acids and thereby significantly enhance adsorption via the mechanism of Lewis acid-base interactions. In addition, adsorption of Cu(II) can be significantly enhanced by the adsorption of organic cosolutes.

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Section: þmentioning

confidence: 65%

Effect of copper ion on adsorption of chlorinated phenols and 1‐naphthylamine to surface‐modified carbon nanotubes

Wang

Zhu

Chen

2011

Enviro Toxic and Chemistry

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“…Although many studies have been conducted to evaluate metsulfuron-methyl in soil (Smith 1986;Ghani and Wardle 2001;Berglf et al 2003;Trabue et al 2006;Wang et al 2007;Pei et al 2008), only a few have been conducted to evaluate metsulfuron-methyl in aquatic systems (WendtRasch et al 2003;Cedergreen et al 2004;Sinclair et al 2006). Since metsulfuron-methyl has a high leaching potential, it could be transferred from the site of application to surface waters during and after application via either overland runoff or incorrect disposal of waste (Belfroida et al 1998;Fogg and Boxall 2004;Sondhia 2009).…”

Section: Introductionmentioning

confidence: 99%

Monitoring of metsulfuron-methyl and its residues in an artificial pond

Wang

Yang

Liu

et al. 2010

Environ Monit Assess

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The behavior of metsulfuron-methyl and its residues in an artificial pond was studied using a (14)C isotopic tracer technique. Throughout the experimental period, the majority of metsulfuron-methyl residues were sustained in the pond water. Furthermore, the metsulfuron-methyl residues were just found in the surface layer of the sediment, and the transfer distance of these residues had only reached 9-12 cm by the end of the experiment. The extract residues of metsulfuron-methyl in sediment were slightly higher than those of the bound residues (BR) during the initial experiment stage, while the BR dominated the surface sediment after 45 days. Finally, the metsulfuron-methyl residues could be combined with humus in the surface sediment, and the distribution of metsulfuron-methyl residues in fulvic acid was significantly higher than that in humic acid.

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“…As can be seen from Fig. 7 were heavy metal with high electronegativity and may form outer-and inner-sphere complexes on the sediment surface (Pei et al 2008). When an innersphere complex was formed, Cu 2?…”

Section: Effect Of Cu 2? and Hg 2? On The Adsorption Of Phenolic Compmentioning

confidence: 90%

Effect of heavy metals and surfactants on the adsorption of phenolic compounds on sediment

Gao

Zhang

Liu

et al. 2012

Int. J. Environ. Sci. Technol.

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The effects of different heavy metals (copper and mercury), cationic surfactants cetylpyridinium chloride, anionic surfactant sodium dodecylbenzenesulfonate and the chemistry of the solution (pH value) on the adsorption of three selected phenolic compounds (2, 4-Dichlorophenol, 2, 4-Dinitro-phenol and 2, 4-Dimethyphenol) on sediment were studied. Results indicated that in the sediment-water system with phenolic compounds: (1) all of the data could be simulated by Freundlich equation; (2) the experiments studying pH effects showed that the adsorption capacity of 2, 4-Dichlorophenol and 2, 4-Dimethyphenol were quite potentia Hydrogenii dependent and increased with decrease in potentia Hydrogenii, while 2, 4-Dinitrophenol followed the different trend; (3) As the concentration increased from 0 to 0.2 mM for Cu 2? , the Freundlich capacity coefficient constant varied from 62.84 to 325.1 for 2, 4-Dichlorophenol, from 13.1 to 82.179 for 2, 4-Dinitrophenol and from 29.433 to 7.976 for 2, 4-Dimethyphenol, respectively. The Freundlich capacity coefficient constant of 2, 4-Dichlorophenol, 2, 4-Dinitrophenol and 2, 4-Dimethyphenol varied from 62.84 and 421.43, 13.1 and 138.1, 29.433 and 1.381, respectively, with concentration of Hg 2? increased from 0 to 0.04 mM, respectively; (4) the adsorption of 2, 4-Dichlorophenol and 2, 4-Dimethyphenol were accentuated by cetylpyridinium chloride but suppressed by sodium dodecylbenzenesulfonate, whereas the adsorption of 2, 4-Dinitrophenol on sediment was enhanced by both cationic and anionic surfactants, effects that are consistent with electrostatic and hydrophobic interactions among ionic surfactants, phenolic compounds and sediment. The results are believed to provide a useful insight into describing the transport and fate of phenolic compounds in natural environments.

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Sorption of Anionic Metsulfuron-Methyl and Cationic Difenzoquat on Peat and Soil As Affected by Copper

Cited by 25 publications

References 26 publications

Effect of copper ion on adsorption of chlorinated phenols and 1‐naphthylamine to surface‐modified carbon nanotubes

Effect of copper ion on adsorption of chlorinated phenols and 1‐naphthylamine to surface‐modified carbon nanotubes

Monitoring of metsulfuron-methyl and its residues in an artificial pond

Effect of heavy metals and surfactants on the adsorption of phenolic compounds on sediment

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