A comparative study of different materials (drinking water treatment sludge, nanoclay, and modified nanoclay) for simultaneous removal of hexavalent chromium and lead

Heidari, Ava; Sayadi, Mohammad Hossein; Atigh, Zahra Biglari Quchan

doi:10.1007/s13762-020-03074-4

Cited by 10 publications

(3 citation statements)

References 83 publications

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“…The results show that the Langmuir model can be considered as a monolayer adsorption mechanism of antimony metal ions on the Fe@Mg‐Al LDH. Similar results were observed in the adsorption isotherm studies of various pollutant‐adsorbent systems [50–53].…”

Section: Resultssupporting

confidence: 86%

Fabrication of superparamagnetic adsorbent based on layered double hydroxide as effective nanoadsorbent for removal of Sb (III) from water samples

Motallebi

Moghimi

Shahbazi

et al. 2021

IET Nanobiotechnology

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In this study, the superparamagnetic adsorbent as Fe@Mg‐Al LDH was synthesised by different methods with two steps for the removal of heavy metal ions from water samples. An easy, practical, economical, and replicable method was introduced to remove water contaminants, including heavy ions from aquatic environments. Moreover, the structure of superparamagnetic adsorbent was investigated by various methods including Fourier transform infrared spectroscopy, field emission scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, and vibrating sample magnetometer. For better separation, ethylenediaminetetraacetic acid ligand was used, forming a complex with antimony ions to create suitable conditions for the removal of these ions. Cadmium and antimony ions were studied by floatation in aqueous environments with this superparamagnetic adsorbent owing to effective factors such as pH, amount of superparamagnetic adsorbent, contact time, sample temperature, volume, and ligand concentration. The model of Freundlich, Langmuir, and Temkin isotherms was studied to qualitatively evaluate the adsorption of antimony ions by the superparamagnetic adsorbent. The value of loaded antimony metal ions with Fe@Mg‐Al LDH was resulted at 160.15 mg/g. The standard deviation value in this procedure was found at 7.92%. The desorption volume of antimony metal ions by the adsorbent was found to be 25 ml. The thermodynamic parameters as well as the effect of interfering ions were investigated by graphite furnace atomic absorption spectrometry.

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Section: Resultssupporting

confidence: 86%

Fabrication of superparamagnetic adsorbent based on layered double hydroxide as effective nanoadsorbent for removal of Sb (III) from water samples

Motallebi

Moghimi

Shahbazi

et al. 2021

IET Nanobiotechnology

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“…The sorption process is the transfer of adsorbate ions from an aqueous solution to the adsorbent (solid phase) across the boundary between the two phases. Recently, adsorption has been extensively used in scientific research and industrial applications, for multiple purposes, including separation of valuable elements and compounds, purifications, and removal of heavy metals and pollutants [21][22][23][24]. Ion-exchange is mainly chemisorptions in nature due to the exchange of ions between the liquid and solid phases.…”

Section: Introductionmentioning

confidence: 99%

Inclusion, Occlusion and adsorption of rare earth elements from chloride media onto Barite.Gypsum Co-precipitate

Abdo

Hagag

Ali

et al. 2022

Preprint

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The high demand for rare earth elements (REEs) was prompted scientists to look for a low-cost technique of REEs extracting from their ores. In this study, a synthetic (BaSO4.CaSO4) composite is prepared by co-precipitation of an equal concentration of barium and calcium chlorides for the recovery of REEs from acidic chloride leach liquor of monazite mineral. The prepared BaSO4.CaSO4 is characterized by FT-IR, XRD, DTA, SEM, particle size analysis, and pore size distribution. Adsorption experiments were carried out at pH = 4 and the sorption equilibrium were reached after 20 minutes. The sorption reaction followed a pseudo 2nd order mechanism. The sorption reaction was regulated with Langmuir adsorption isotherm. The monolayer adsorption capacity is 168.63 mg g-1 at 303 K. Thermodynamic studies showed that the sorption reaction is endothermic and spontaneous. The desorption of RE3 + is accomplished with 90.14% efficiency using 1 mol L-1 HNO3. BaSO4.CaSO4 could be reused after 5 adsorption-desorption cycles with 73% efficiency. The obtained results discuss the efficient use of 1:1 Barite. Gypsum composite as a natural mixture for REEs extraction. The adsorption capacity of Barite. Gypsum composite was 136 mg g-1.

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“…The NC from montmorillonite family is a hydrophilic clay formed by layers of silica tetrahedral and alumina octahedral sheets in a 2:1 ratio (Floody et al 2009). Due to their low cost and abundance, they have been widely studied for several applications such as a drug-delivery carrier (Jayrajsinh et al 2017), water treatment (Heidari et al 2021), composites reinforcement (Moghri et al 2018), and as coating layers for papers (Majeed et al 2013). Cellulose bers can be processed to obtain nanostructures with different properties depending on extraction method and bers source.…”

Section: Introductionmentioning

confidence: 99%

Effect of Overlapping Eco-Friendly Cellulose Nanofibrils and Nanoclay Layers on Mechanical and Barrier Properties of Spray-Coated Papers

Oliveira

Mirmehdi

Scatolino

et al. 2021

Preprint

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This work proposes to evaluate the effect of spray-coating in papers using eco-friendly cellulose nanofibrils (CNFs) and nanoclay (NC) on mechanical and barrier properties for application as reinforced bags. Sack kraft papers of 60 g m-² (C60) were coated with CNFs + CNFs/NC in 4 layers (L5), 40 g m-² of CNFs + CNFs/NC in 3 layers (L4), 30 g m-² with CNFs/NC in 2 layers (L3) and 10 g m-² of CNFs in 1 layer (L2), and compared to uncoated sack kraft papers with basis weight of 60 g m-² (C60), 80 g m-² (C80) and 120 g m-² (C120). The coated papers L2; L3; L4 and L5 obtained a decrease in water vapor transmission rate (WVTR) of 3.5%; 17%; 14% and 14%, respectively, when compared to C60. Comparing L2 and L3, CNF layer induced lower contact angles on the coated paper than CNF/NC layer. When compared coated papers with C120, it was observed an increase of around 66% in tensile strength for L2, around 44% for L3, and decrease of ~ 18% for L5 coated papers. L4 achieved the same tensile strength (when divided by basis weight) than C120. L2 and L3 coated papers led to the highest values of Young’s modulus, with increase of 56% and 38%, respectively, when compared to C60. Spray-coating in the present conditions improved the mechanical and barrier properties of the coated papers, being a possible alternative to produce papers with lower basis weight and using renewable raw materials.

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A comparative study of different materials (drinking water treatment sludge, nanoclay, and modified nanoclay) for simultaneous removal of hexavalent chromium and lead

Cited by 10 publications

References 83 publications

Fabrication of superparamagnetic adsorbent based on layered double hydroxide as effective nanoadsorbent for removal of Sb (III) from water samples

Fabrication of superparamagnetic adsorbent based on layered double hydroxide as effective nanoadsorbent for removal of Sb (III) from water samples

Inclusion, Occlusion and adsorption of rare earth elements from chloride media onto Barite.Gypsum Co-precipitate

Effect of Overlapping Eco-Friendly Cellulose Nanofibrils and Nanoclay Layers on Mechanical and Barrier Properties of Spray-Coated Papers

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