Modification of clay barriers with a cationic surfactant to improve the retention of pesticides in soils

Rodríguez‐Cruz, M. Sonia; Sánchez-Martín, María J.; Andrades, M. Soledad; Sánchez‐Camazano, M.

doi:10.1016/j.jhazmat.2006.06.042

Cited by 89 publications

(47 citation statements)

References 32 publications

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“…These compounds are unable to compete with water for the adsorption sites, which are led by the van der Waals interaction between the open channels and the adsorbates. To transform the hydrophilic intra-crystalline channels and tunnels of the AH-SEP to strongly hydrophobic, cationic surfactant CTAB was used to modify the AH-SEP to obtain OAH-SEP powders [17,27]. The aim of this experiment was to compare the adsorption behavior between the PES/(acid-activated sepiolite) and the PES/(organo-sepiolite) particles.…”

Section: Characterization Of the Ah-sep And Oah-sep Powdersmentioning

confidence: 99%

“…Its fibrous chain structure, consisting of ribbons alternating with open channels along the fiber axes, provides SEP with high surface area, and its relatively low price makes it an attractive adsorbent [16]. In addition, the sorption capacity, which was restricted by the external surface, may be enhanced by thermal or chemical modifications [17,18]. However, when SEP powders were used directly for adsorption applications, especially used in liquid medium, SEP powders together with soluble organic compounds in the clay would be eluted.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of polyethersulfone-modified sepiolite hybrid particles for the removal of environmental toxins

Cheng

Ren

et al. 2011

Chemical Engineering Journal

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Section: Characterization Of the Ah-sep And Oah-sep Powdersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of polyethersulfone-modified sepiolite hybrid particles for the removal of environmental toxins

Cheng

Ren

et al. 2011

Chemical Engineering Journal

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“…For various soils, the different extent of HOCsorption enhancement by cationic surfactants may be attributed to the surfactant sorbed by different components. Many studies have indicated that clay minerals would play an essential role in cationic surfactant sorption onto soils (Konan et al 2008;Rodriguez-Cruz et al 2007; Wang and Keller 2008). In a soil-HOCs system within cationic surfactants, the hydrophobic organic compounds would partition into both the clay-sorbed surfactants and the nature organic matter.…”

Section: Introductionmentioning

confidence: 99%

Effect of soil components on the surfactant-enhanced soil sorption of PAHs

Lü

Zhu

2011

J Soils Sediments

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Purpose The use of cationic surfactants was proposed to enhance the soil retention of hydrophobic organic contaminants (HOCs). However, due to the complexity of soil composition, the effect of cationic surfactants on the soil sorption of HOCs was limited to a qualitative understanding. To gain further insight into the mechanism of the surfactant and predict its efficiency, a comparative study on the HOCs sorption capacities of the surfactants sorbed on pure typical soil components was investigated. Materials and methods The sorption of cationic surfactant onto five pure typical soil components and the sorption of polycyclic aromatic hydrocarbons (PAHs) by the sorbed surfactant were conducted using batch equilibration methods. Humic acid (HA) and quartz were chosen as the representatives of organic matter and sand, respectively. Montmorillonite, kaolinite, and illite were chosen as representatives of clay minerals. Results and discussion The cationic surfactant sorption capacities of different soil components were of great difference, and the PAH sorption capacities of the surfactant sorbed onto different components were also very different. Aside from the clay minerals, HA was a very active adsorbent for the cationic surfactant, and the sorption mechanism included both adsorption and partition-like processes. For each pure soil component and a certain PAH, a proximately piecewise function was found to describe the relationship of surfactant-normalized PAH distribution coefficient K sf and the sorption amount of the surfactant on solid Q e-DDPB (R>0.9). As a result, the sorption of PAHs by different soil components with certain surfactant loading can be estimated. Conclusions The effect of soil organic matter such as HA could not be ignored when predicting the soil sorption of cationic surfactants. The PAH partition capacities of the sorbed surfactant on HA or clay minerals were very different. However, for each pure soil component, the K sf value was specifically related with the surfactant loading, which provided a possible means of predicting the efficiency of the cationic surfactant in enhancing the sorption of PAHs onto soils.

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“…Liu et al (2010) found that the sorption capability of organically modified attapulgite for hexachlorocyclohexane (HCHs) was increased 40 times compared with the control. Rodríguez-Cruz et al (2007) also found that modified attapulgite significantly improve the immobilization and retention of hydrophobic pesticides in soils.…”

Section: Introductionmentioning

confidence: 85%

Application of modified attapulgite in phthalate acid ester-contaminated soil: Effects on phthalate acid ester dissipation and the composition of soil microbial community

Gao

Shi

Zhou³

et al. 2016

Environ Sci Pollut Res

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The effects of modified attapulgite (MA) on the dissipations of the plasticizers di-n-butyl phthalate (DBP) and di-(2-ethylhexyl) phthalate (DEHP) in soil, as well as on the composition of soil microbial community, were studied. DBP, DEHP (50 mg kg −1 in soil, respectively), and MA (1, 5, and 10 % in soil) were mixed thoroughly with soil and incubated for 60 days. DBP-and DEHP-contaminated soils without MA were used as the controls. Both of DBP and DEHP residues in bulk soils and four soil fractions were measured at five incubation times 1, 7, 15, 30, and 60 days, and their dissipation kinetic equations were analyzed. The microbial phospholipid fatty acid (PLFA) concentrations were also measured at the end of experiment. Our results showed that the effect of modified attapulgite on DBP dissipation was related to its dosage in soil. The DEHP dissipation was both inhibited by MA at the 5 and 10 % rates in soils. The application of MA changed the content percentages but did not change the concentration order of phthalate acid esters (PAEs) in soil particlesize fractions. The total microbial PLFA content was significantly increased by 5 and 10 % MA in the contaminated soils. Meanwhile, the gram-negative (GN)/gram-positive (GP) ratios increased when MA was applied at the dosages of 5 and 10 % in DBP and 10 % in DEHP-contaminated soils. Principal component analysis (PCA) indicated that the change of bacteria PLFA, especially the GN bacterial PLFA, depended on the dosages of MA added into soil. The application of MA into soil has a positive effect on reducing the ecotoxicity of PAEs in soil based on the analysis of the soil microbial PLFA.

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Modification of clay barriers with a cationic surfactant to improve the retention of pesticides in soils

Cited by 89 publications

References 32 publications

Preparation of polyethersulfone-modified sepiolite hybrid particles for the removal of environmental toxins

Preparation of polyethersulfone-modified sepiolite hybrid particles for the removal of environmental toxins

Effect of soil components on the surfactant-enhanced soil sorption of PAHs

Application of modified attapulgite in phthalate acid ester-contaminated soil: Effects on phthalate acid ester dissipation and the composition of soil microbial community

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