Organo/layered double hydroxide nanohybrids used to remove non ionic pesticides

Chaara, D.; Bruna, Felipe; Ulibarri, M.A.; Draoui, Khalid; Barriga, C.; Pavlović, I.

doi:10.1016/j.jhazmat.2011.09.034

Cited by 34 publications

(33 citation statements)

References 33 publications

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“…In the past years, Layered Double Hydroxides (LDHs) have been widely used for remediation processes as they can intercalate and adsorb contaminants and hence reduce their mobility [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…In LDHs, the most common divalent cations (Me II ) are Mg, Ca, Mn, Fe, Ni, Cu, Zn, while Al, Mn, Fe, Co, Ni, Cr, Ga serve as common trivalent anions (Me III ) [5][6][7]. In natural systems the most abundant interlayer anions (A m− ) are CO 3 2− , OH − , Cl − , SO 4 2− [5][6][7]. Studies showed that it is possible to intercalate anionic coordination compounds and polyoxometalates [5,8], biochemical molecules [9] or even large organic compounds [6,[10][11][12][13] as well as neutral species such as ethylene glycol or glycerin, which are sometimes used to swell the structure of the LDH [14].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Chain Length and Functional Group of Organic Anions on the Retention Ability of MgAl- Layered Double Hydroxides for Chlorinated Organic Solvents

et al. 2019

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Nowadays, the contamination of groundwater and soils by chlorinated organic solvents is a severe and worldwide problem. Due to their swelling properties, Layered Double Hydroxides (LDHs) are potentially excellent compounds to retain chlorinated organic solvents from aquifers. By intercalating organic anions, the polarity of the interlayer space can be changed from hydrophilic to hydrophobic, enhancing the adsorption of chloro-organic molecules onto the alkyl chains of intercalated organic anions. In this study, organically modified LDHs were synthesized and their efficiency was tested in batch experiments with three different chlorinated organic solvents, namely trichloroethylene, 1,1,2-trichloroethane and trichloromethane (chloroform), to examine the influence of the chain length and the functional group of the intercalated organic anion upon the retention ability of a LDH due to different electronic interactions and different sizes of the interlayer space. All synthesized and used samples were characterized using powder X-ray diffraction, thermal analysis coupled with mass spectrometry and Fourier-transform infrared spectroscopy; freshly synthesized materials were additionally analyzed regarding their particle size distribution and specific surface area. Results of the batch experiments showed that only LDHs with intercalated long-chain organic anions could be efficient adsorbents for the removal of chlorinated organic solvents from contaminated water. A selective efficiency towards 1,1,2-trichloroethane and trichloromethane can be proposed for these reactants.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Chain Length and Functional Group of Organic Anions on the Retention Ability of MgAl- Layered Double Hydroxides for Chlorinated Organic Solvents

et al. 2019

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“…These interlayer distances depend upon the orientation of the chains within the interlamellar space. As the length of sodium dodecylsulfate molecule is 20.8 Å [16], the basal spacing of 26.8 Å corresponds to a perpendicular monolayer arrangement of SDS ions between the host layers [17]. The characteristic reflections of SDS are absent in the XRD pattern of the organo/Zn-Al LDHs.…”

Section: -mentioning

confidence: 99%

Zn-Al layered double hydroxides for adsorption and photocatalytic removal of с ationic dye

Starukh¹

2016

Him. Fiz. Tehnol. Poverhni

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The removal of hazardous substances from wastewater is a major problem in the world. The advantages of application of Zn-Al layered double hydroxides (LDHs) and their derivatives for removal of organic contaminants consist in the combination of high adsorption capacity of LDHs and the presence of a photoactive component. Therefore, the present paper focuses on study of the adsorption and photocatalytic capabilities of Zn-Al LDHs to remove cationic dye methylene blue (MB) from aqueous solutions. Zn-Al LDHs with Zn:Al ratio 2 were synthesized by coprecipitation method. Zn-Al LDHs were characterized by XRD, thermogravimetric and spectroscopy analysis. The reconstruction of calcined Zn-Al LDHs in sodium dodecyl sulfate (SDS) solutions in the range of concentrations from 0.012 mol•L-1 to 0.205 mol•L-1 was performed to obtain organo/Zn-Al LDHs. The partial SDS intercalation was clearly evidenced by the appearance of a peak at low 2θ values. SDS-modified LDHs demonstrate the high adsorption capacity to MB. About 90 % of dye was adsorbed with organo/Zn-Al LDHs from 2×10-4 mol•L-1 MB solution. The study on optical properties of calcined and reconstructed Zn-Al LDHs has detected the presence of ZnO that makes possible the using of Zn-Al LDHs as photocatalysts. About 50 % of dye was destructed by irradiation of MB solution in the presence of Zn-Al LDHs from 2×10-5 mol•L-1 MB solution in the presence of calcined at 450 °C Zn-Al LDHs. It has been found that the most complete removal of the dye from highly concentrated solutions is achieved by MB adsorption with organo/Zn-Al LDH. The investigation of the irradiation influence on the optical spectra of MB adsorbed on the surface of organo/Zn-Al LDH is needed to clarify the photocatalytic activity of ZnO-contained organo/Zn-Al LDH. The high adsorption capacity of organo/Zn-Al LDHs and the ease of both synthesis and separation processes rendered this adsorbent to be a promising candidate for environmental remediation.

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“…In addition, with the development of economy, society has become more concerned about food security. Consequently, to overcome these problems, controlled release formulations (CRFs) have been considered as a possible alternative to compensate for the loss of effectiveness of conventional pesticide formulations (Bhattarai et al 2010;Chaara et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Controlled Pesticide Release from Porous Composite Hydrogels Based on Lignin and Polyacrylic Acid

Sun¹,

Ma²,

Gui-zhen³

et al. 2016

BioResources

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For the controlled release of pesticides, a novel composite porous hydrogel (LBPAA) was prepared based on lignin and polyacrylic acid for use as the support frame of a pore structure for water delivery. The LBPAA was analyzed to determine its water-swelling and slow release properties. The controlled release properties of LBPAA were evaluated through experiments in relation to the cumulative release of pesticides, with particular emphasis on environmental effects and release models. The porous LBPAA hydrogel showed improved properties compared to polyacrylic acid, and could therefore be considered an efficient material for application in controlled release systems in agriculture.

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Organo/layered double hydroxide nanohybrids used to remove non ionic pesticides

Cited by 34 publications

References 33 publications

Effect of Chain Length and Functional Group of Organic Anions on the Retention Ability of MgAl- Layered Double Hydroxides for Chlorinated Organic Solvents

Effect of Chain Length and Functional Group of Organic Anions on the Retention Ability of MgAl- Layered Double Hydroxides for Chlorinated Organic Solvents

Zn-Al layered double hydroxides for adsorption and photocatalytic removal of с ationic dye

Controlled Pesticide Release from Porous Composite Hydrogels Based on Lignin and Polyacrylic Acid

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