Organoclays for soil remediation: Adsorption of 2,4-dichlorophenol on organoclay/aquifer material mixtures studied under static and flow conditions

Pernyeszi, Tı́mea; Kasteel, R.; Witthuhn, Barbara; Klahre, P.; Vereecken, Harry; Klumpp, Erwin

doi:10.1016/j.clay.2006.01.004

Cited by 30 publications

(24 citation statements)

References 33 publications

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“…This could be explained by the fact that the higher the initial concentration the higher is the diffusive and dispersive flux and consequently the lower is the fraction of the solid matrix that could be in equilibrium with lead(II) cations. However, contrary to Mg-B, the first order rate coefficients (a) of RCS were estimated to 10 À4 min À1 which are lower than the values found by Jellali et al (2010) and Pernyeszi et al (2006) when studying ammonium adsorption by a natural sandy soil and 2,4 dichlorophenol transport in an aquifer material mixed with different percentages of organoclays, respectively. This result indicates that lead mass transfer from the aqueous solutions to the used solid matrixes was relatively slow.…”

Section: Lead Btcsmentioning

confidence: 90%

Lead removal from aqueous solutions by raw sawdust and magnesium pretreated biochar: Experimental investigations and numerical modelling

Jellali

Diamantopoulos

Haddad

et al. 2016

Journal of Environmental Management

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Section: Lead Btcsmentioning

confidence: 90%

Lead removal from aqueous solutions by raw sawdust and magnesium pretreated biochar: Experimental investigations and numerical modelling

Jellali

Diamantopoulos

Haddad

et al. 2016

Journal of Environmental Management

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“…Ex situ remediation may gradually be replaced by in situ remediation (Sui et al 2003). Among the many in situ remediation technologies, remediation of contaminated soils and groundwaters by organoclays has been a topic under development (Wang et al 1997;Pernyeszi et al 2006;Nzengung et al 1996;Ö zcan et al 2006;Zhou et al 2006;Oyanedel-Craver et al 2006;Hermosín et al 2006). Organoclays are synthesized by exchanging the naturally occurring inorganic cations with organic cations.…”

mentioning

confidence: 99%

Sorption of 1,1,1-trichloro-2,2-bis(p-chlorophenyl) ethane (DDT) by clays and organoclays

Rong-ling

Zhang

Xiaozhi

et al. 2008

Environ Geochem Health

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This study focused on the sorption isotherms of 1,1,1-trichloro-2,2-bis(p-chlorophenyl) ethane (p,p'-DDT) and 1,1-dichloro-2,2-bis(p-chlorophenyl) ethylene (p,p'-DDE) on different original clays (i.e., zeolite, montmorillonite and attapulgite) and organoclay complexes. Sorption of organic pollutants was determined using gas chromatographic (GC) techniques to investigate the sorption behavior, and characterize the effect of, different organic cations. The original clays only sorbed low amounts of p,p'-DDT and p,p'-DDE, and the sorptive curves can be classified as L-shaped. Organoclays exhibited higher amounts of p,p'-DDT and p,p'-DDE sorption. The p,p'-DDT and p,p'-DDE sorption increased with increasing total organic carbon (OC) content of the organoclays. For hexadecyltrimethylammonium (HDTMA)-modified organoclays, the dominant adsorptive medium showed the partitioning sorption of hydrophobic-hydrophobic interaction, indicating no competitive sorption. The sorptive curves can be classified as C-shaped of constant partition (CP). However, benzyltrimethylammonium (BTMA)-modified organoclays exhibited competitive sorption. The sorption isotherm curves can be classified as S-shaped. The sorptive capacity of the HDTMA-modified organoclays for p,p'-DDT were higher than those for p,p'-DDE, but the BTMA-modified organoclays showed a reverse trend. This can be attributed to the different structures and shapes of organic cations, giving different sorptive mechanisms. The p,p'-DDT and p,p'-DDE sorption onto HDTMA-modified organoclays were caused by chemical interaction, with the BTMA modified organoclays occuring due to physical sorption.

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“…Depending on the dimensions of R and R , organoclays display distinct adsorptive properties and abilities [6]. * corresponding author; e-mail: natasha@nanosys.ihtm.bg.ac.rs Numerous studies have focused on the investigation of adsorption of nonionic organic compounds to organoclays as a function of surfactant type and loading [7][8][9][10]. There are only few studies on adsorption of metals to organoclays [11,12], and they have revealed that organoclays have ability to adsorb metals.…”

Section: Nr]mentioning

confidence: 99%

Synthesis, Characterization and Adsorptive Properties οf Organobentonites

et al. 2010

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In this paper partial and complete substitution of cations in the interlayer region of clay with different amounts of two aliphatic ammonium cations was performed with aim of synthesis of organobentonites with multipurpose adsorption properties. Domestic clay from Bogovina was submitted according to a common procedure used for the obtention of organobentonite, which comprises the following steps: grinding, sieving, Na-exchange, cation exchange and drying. The samples were characterized by X-ray diffraction and infrared spectroscopy. The incorporation of surfactant molecules into smectite structure lead to constant increase of d 001 basal spacing. IR absorption bands assigned to methyl and methylene vibrations increased with the increase of surfactant/bentonite ratio and length of aliphatic chain in surfactant molecules. Adsorptive properties of the obtained materials were in accordance with their organophylicity: the adsorption of organic dye increased while the rate of removal of Pb 2+ by adsorption decreased.

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Organoclays for soil remediation: Adsorption of 2,4-dichlorophenol on organoclay/aquifer material mixtures studied under static and flow conditions

Cited by 30 publications

References 33 publications

Lead removal from aqueous solutions by raw sawdust and magnesium pretreated biochar: Experimental investigations and numerical modelling

Lead removal from aqueous solutions by raw sawdust and magnesium pretreated biochar: Experimental investigations and numerical modelling

Sorption of 1,1,1-trichloro-2,2-bis(p-chlorophenyl) ethane (DDT) by clays and organoclays

Synthesis, Characterization and Adsorptive Properties οf Organobentonites

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