Sorption of arsenic by surfactant-modified zeolite and kaolinite

Li, Zhaohui; Beachner, Ryan; McManama, Zoe; Hong, Hanlie

doi:10.1016/j.micromeso.2007.03.038

Cited by 128 publications

(76 citation statements)

References 22 publications

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“…The metal speciation also determines the removal mechanisms acting on a surfactant-modified clay. In the case of the sorption of arsenate and arsenite on HDTMA-kaolinite, anion exchange is considered the dominant mechanism for arsenate sorption, whereas surface complexation could also be accounted for arsenite sorption [97].…”

Section: Surfactant-modified Claysmentioning

confidence: 99%

Use of Surfactant-Modified Zeolites and Clays for the Removal of Heavy Metals from Water

Jiménez-Castañeda

Medina

2017

Water

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Abstract:The presence of heavy metals in water for human use or consumption represents a major risk to human health. It is therefore important to find materials to remove or minimise the concentration of these pollutants. The adsorption process for the removal of heavy metals is favoured by the use of low-cost materials that exhibit a porous structure and a high cation exchange capacity, such as zeolites and clays. On the other hand, chemical treatments, e.g., using acids and bases, can modify the properties of these materials, but more recently the application of surfactants has also shown to be successful for broadening their metal affinity and allowing the removal of diverse organic and inorganic pollutants from water. This paper reviews the application of modified zeolites and clays for the removal of heavy metals from water.

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Section: Surfactant-modified Claysmentioning

confidence: 99%

Use of Surfactant-Modified Zeolites and Clays for the Removal of Heavy Metals from Water

Jiménez-Castañeda

Medina

2017

Water

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“…5, No. 12;2013 Boron adsorption data were obtained by a slight modification of the technique used by Li et al (2007), at two pH values, namely 7.0 ± 0.1 and 9.5 ± 0.1 for the untreated SMZ and 3.0 ± 0.1 and 9.5 ± 0.1 for the treated SMZ. Specifically, five g sub-samples of the SMZ (untreated or treated), in two replications, were placed in polypropylene centrifuge tubes with 20 mL of deionized water containing B at concentrations 0, 5, 10 and 15 mg L -1 , as H 3 BO 3 .…”

Section: Boron Adsorption Experimentsmentioning

confidence: 99%

“…SMZ, i.e. zeolite with positive surface charge after its surface modification with a surfactant substance, has been proven effective adsorbent for many anions, such as ΝΟ 3 -, SO 4 2- (Li et al, 1998), CrO 4 2- (Haggerty & Bowman, 1994;Li, 2004), Η 2 AsO 4 -and ΗAsO 4 2- (Li et al, 2007), ClO 4 - (Zhang et al, 2007), HSeO 3 -and SeO 4 2- (Frenay et al, 2000). Since SMZ has been proven an effective adsorbent for many anions it could be also useful for removing B from water through adsorption.…”

Section: Introductionmentioning

confidence: 99%

Removal of Boron by Surfactant Modified Zeolitic Tuff from Northeastern Greece

Dionisiou¹,

Misopolinos²

2013

JAS

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Boron adsorption on surfactant modified zeolite (SMZ) was investigated, in the perspective of using SMZ for B removal from irrigation waters, since SMZ has been proven efficient adsorbent for many anions. A calcareous clinoptilolite was used and a sub-sample was treated with HCl. Then the charge of the external surface of the untreated and treated zeolite was modified and B adsorption was studied. The SMZ adsorbed B and its adsorption capacity was increased with HCl treatment and pH adjustment at the strongly alkaline range. However, in all cases the relative amounts of B removed from solution were much lower than other anions reported in the literature. In addition, B concentration in the equilibrium solution was above 3 mg L -1 , which is considered a critical limit for B in irrigation waters in respect to the risk of B phytotoxicity. It was concluded that SMZ is not an effective means for B removal from irrigation waters and thus its use for B water treatment is not recommended.

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“…Most of the recent studies on sorptive capacity of clays include batch tests with aqueous solutions of trace elements, for example As, Pb, Cd, Cu, Zn, Ni, Mn (for example [53,[62][63][64][65][66]) and radionuclides, for example Cs, Sr, Eu, Th [67]. An in-depth review of trace element adsorption on natural and modified clays is given by Bhattacharyya and Gupta [68].…”

Section: Claysmentioning

confidence: 99%

“…Other soil amendments might be preferred over clays due to the stated inability to immobilize high concentrations of multiple elements that often occur in contaminated soils [63] and expected high desorption rates, especially at lower pH, reaching up to 100% of sorbed amount of trace elements [71,73,74]. A combination of clays with other amendments, for example organic matter, may reduce the rate of trace element desorption.…”

Section: Claysmentioning

confidence: 99%

Trace Element Immobilization in Soil Using Amendments

Kumpienė

2010

Trace Elements in Soils

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Sorption of arsenic by surfactant-modified zeolite and kaolinite

Cited by 128 publications

References 22 publications

Use of Surfactant-Modified Zeolites and Clays for the Removal of Heavy Metals from Water

Use of Surfactant-Modified Zeolites and Clays for the Removal of Heavy Metals from Water

Removal of Boron by Surfactant Modified Zeolitic Tuff from Northeastern Greece

Trace Element Immobilization in Soil Using Amendments

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