[SnS4]4- clusters modified MgAl-LDH composites for mercury ions removal from acid wastewater

Xu, Haomiao; Xie, Jiangkun; Liu, Xiaoshuang; Yuan, Yong; Liu, Ping

doi:10.1016/j.envpol.2018.12.009

Cited by 27 publications

(11 citation statements)

References 47 publications

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“…To increase absorption capacity for heavy metal ions, LDH is intercalated with molecules, which can cause complexation with the heavy metal ions. LDH that is intercalated with sulfide has good absorption capacity for heavy metal ions, and its selective absorption has attracted wide attention, which will be described later [57,58]. In addition, LDH is mainly intercalated with organic molecules, which can significantly improve absorption capacity for heavy metal ions [59][60][61][62].…”

Section: Intercalationmentioning

confidence: 99%

Functionalized layered double hydroxide applied to heavy metal ions absorption: A review

Tang

Qiu

Lü

et al. 2020

Nanotechnology Reviews

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The use of functional material can help mitigate the pollution by heavy metals, which presents an array of risks to human production and life. This work provides a comprehensive review of the current knowledge on functionalized layered double hydroxide (LDH) as a heavy metal absorption material, by synthesizing the information from a total of 141 relevant publications published since 2005. LDH provides a potentially highly efficient method to adsorb heavy metal ions, which is simple to prepare and of low cost. The lack of functional groups and structural components of pristine LDH, however, limits the absorption capacity and widespread applications of LDH. Through intercalation, surface modification, or loading on substrates, functional groups or structural components are introduced into the pristine LDH to prepare functionalized LDH. In this process, the hydroxyl group and the valence state of [Mg(OH)6] octahedrons play a crucial role. Functionalized LDH can be endowed with selective absorption capacity and enhanced stability and recyclability. After adsorbing heavy metal ions, functionalized LDH can be readily separated from the liquid phase. These aspects are discussed, along with the structure and composition, shape and size, and synthesis methods and research tools of LDH. This work concludes with the discussion of preparation and utilization and a look to the future in terms of identified research needs regarding the preparation, use, and recycling (or upcycling) of economical and environmental-friendly LDH.

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Section: Intercalationmentioning

confidence: 99%

Functionalized layered double hydroxide applied to heavy metal ions absorption: A review

Tang

Qiu

Lü

et al. 2020

Nanotechnology Reviews

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“…2c and d, the SEM and TEM images of LDH/NO 3 demonstrate that the pristine LDH/NO 3 has a nanosheet-assembled structure with hexagonal morphology, which is consistent with previously reported MgAl-LDHs. 13 The SEM and TEM observations of LDH/MoS 4 (Fig. 2f and g) provide evidence of the retention of the platelike two-dimensional morphology after the ion exchange of NO 3 − groups with [MoS 4 ] 2− .…”

Section: Resultsmentioning

confidence: 80%

“…Unlike cationic clay minerals, layered double hydroxides (LDHs) are anionic clay compounds 12,13 that consist of stacked cationic layers and counter anions between the interlayers. Generally, the host layers are two-dimensional structural layers of nanomaterial with the general formula [M 2+ 1−x M 3+ x (OH) 2 ] x (A n− ) x/n •mH 2 O, where M 2+ and M 3+ serve as divalent and trivalent cations while A n− represents the counter anion.…”

Section: Introductionmentioning

confidence: 99%

“…According to Pearson's hard-soft Lewis acid-base principles, sulfide-based materials possess superior affinity toward many Lewis acidic soft heavy metal cations. 22 Recently, several novel metal sulfides such as [MoS 2 ], [WS 2 ], [K 2x Mn x Sn 3−x S 6 ], 23,24 chalcogenide-based clusters 13 and aerogels 25 have been successfully applied for highly efficient removal of heavy metals from contaminated gas, water, and soil. Among them, chalcogenide clusters such as [Sn 2 S 6 ] 4− , [SnS 4 ] 4− , and [MoS 4 ] 2− exhibit robust sulfur-active sites and pore structures 13,22,26 possessing a great potential in heavy metal capture.…”

Section: Introductionmentioning

confidence: 99%

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Unveiling the dual roles of the intercalation of [MoS₄]²⁻ clusters in boosting heavy metal capture by Ca–Al layered double hydroxide

Yang

Zhao

et al. 2023

Environ. Sci.: Nano

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“…Classification of materials with a strong affinity for Hg 0 capture and the selected sorbents with Hg 0 adsorption capacities in terms of temperatures. ,,,,,− …”

Section: Current Classification Of Solid Materialsmentioning

confidence: 99%

Heterogeneous Reaction Mechanisms and Functional Materials for Elemental Mercury Removal from Industrial Flue Gas

Hong

et al. 2021

ACS EST Eng.

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Gaseous elemental mercury (Hg0) is of increasing concern in industrial flue gases because of its difficult disposal. Currently, catalysis conversion and adsorption to oxidized species (Hg2+) and particle-bonded states (Hgp) are two common Hg0 disposal methods. While no clear boundary exists between these methods, the selection of technologies for practical applications highly depends on the gas temperature, mercury concentration, and gas components over a solid material. This review aims to describe some principles for solid material selection, discusses the heterogeneous reaction mechanisms for gaseous Hg0 conversion, classifies the various types of catalysts and sorbents, and summarizes their potential applications. Gaseous Hg0 undergoes interface physical adsorption, catalytic oxidation, and chemical adsorption processes. Overcoming the surface bonding energies can convert the Hg0 to Hg2+ via the catalytic process. Meanwhile, strong bonding energies can ensure chemical adsorption, resulting in mercury surface solidification. On this basis, the catalysts and sorbents materials, the reaction mechanism, and different types of solid materials were evaluated. We clearly discussed the reaction mechanism over different type of functional materials for Hg0 removal, to provide recommendations for studies to address concerns regarding laboratory-scale to full-scale applications. Moreover, some key parameters and a basic understanding of the practical applications were proposed.

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[SnS4]4- clusters modified MgAl-LDH composites for mercury ions removal from acid wastewater

Cited by 27 publications

References 47 publications

Functionalized layered double hydroxide applied to heavy metal ions absorption: A review

Functionalized layered double hydroxide applied to heavy metal ions absorption: A review

Unveiling the dual roles of the intercalation of [MoS₄]²⁻ clusters in boosting heavy metal capture by Ca–Al layered double hydroxide

Heterogeneous Reaction Mechanisms and Functional Materials for Elemental Mercury Removal from Industrial Flue Gas

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[SnS4]4- clusters modified MgAl-LDH composites for mercury ions removal from acid wastewater

Cited by 27 publications

References 47 publications

Functionalized layered double hydroxide applied to heavy metal ions absorption: A review

Functionalized layered double hydroxide applied to heavy metal ions absorption: A review

Unveiling the dual roles of the intercalation of [MoS4]2− clusters in boosting heavy metal capture by Ca–Al layered double hydroxide

Heterogeneous Reaction Mechanisms and Functional Materials for Elemental Mercury Removal from Industrial Flue Gas

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Unveiling the dual roles of the intercalation of [MoS₄]²⁻ clusters in boosting heavy metal capture by Ca–Al layered double hydroxide