Comparison of adsorption and desorption of phosphate on synthesized Zn-Al LDH by two methods in a simulated soil solution

Hatami, Hadis; Fotovat, Amir; Halajnia, Akram

doi:10.1016/j.clay.2017.11.032

Cited by 104 publications

(43 citation statements)

References 65 publications

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“…and Cl − ions was calculated as~80% for NH1 (W/V = 30 g/L). The obtained results by the current study showed enlargement in the removal percentage of the mentioned anions in comparison to the results concluded by Hatami et al [29] who tested the removal of some anions from standard aqueous solution using Zn-Al LDH only. They noted that the removal percentage for both hydrogen phosphate and sulfate from model mixed standards was 80% and 20%, respectively, whereas all materials studied did not eliminate chloride from the solution.…”

Section: −supporting

confidence: 53%

Designing Dual-Effect Nanohybrids for Removing Heavy Metals and Different Kinds of Anions from the Natural Water

et al. 2020

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In the present study, well-designed nanohybrids are used to act as effective dual-function adsorbents for removing both anions and heavy metals from natural water, at the same time. In this trend, Zn-Al LDHs and graphene oxide are applied to build up building blocks to produce a series of nanohybrids. These nanohybrids were characterized by X-ray diffraction, thermal analyses, Fourier transform infrared spectroscopy, Raman spectroscopy, and scanning and transmission electron microscopy. These techniques confirmed that the prepared nanohybrids contained nanolayered structures with three–dimensional porous systems. These porous systems were identified by the nitrogen adsorption-desorption isotherms and water purification experiments. The obtained results indicated that these nanohybrids included suitable structures to act as dual function materials. The first function was achieved by removing more than 80% of both cadmium and lead from the natural water. The second function was accomplished by eliminating of 100% of hydrogen phosphate and bromide anions alongside with 80%–91% of sulfate, chloride, and fluoride anions. To conclude, these well-designed nanohybrids convert two-dimensional nanolayered structures to three-dimensional porous networks to work as dual-function materials for removing of heavy metals and different kinds of anions naturally found in the fresh tap water sample with no parameters optimization.

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Section: −supporting

confidence: 53%

Designing Dual-Effect Nanohybrids for Removing Heavy Metals and Different Kinds of Anions from the Natural Water

et al. 2020

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“…), and anions (CO 3 2− , SO 4 2− , NO 3 − , Cl − , OH − , etc.) [ 3 , 5 , 6 , 7 , 8 , 9 , 10 ]. Generally, CaAl-Cl-LDHs can effectively absorb “target ions” from an aqueous medium in the following ways: co-precipitation, isomorphic substitution, and surface complexation and chelation [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Crystalline/Amorphous Blend Identification from Cobalt Adsorption by Layered Double Hydroxides

et al. 2018

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In this study, the adsorption behavior of CaAl-Cl layered double hydroxide (CaAl-Cl-LDH) with a controlled pH value (pH = 6) on Co(II) ions ([Co] = 8 mM) is investigated. The comprehensively accepted mechanism of cobalt adsorption on LDH is considered to be co-precipitation, and the final adsorbed products are normally crystalline Co-LDH. One unanticipated finding is that crystalline/amorphous blends are found in the X-ray diffraction (XRD) pattern of Co-adsorbed LDH. To shed light on the adsorption products and the mechanisms in the adsorption process of Co(II) in an aqueous solution by CaAl-Cl-LDH, a series of testing methods including Fourier-transform infrared spectroscopy (FT-IR), Scanning electron microscope (SEM), High-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma (ICP) are applied to clarify the interaction between cobalt and CaAl-Cl-LDH. According to the comprehensive analysis, the formation of the crystalline/amorphous blends corresponds to two adsorption mechanisms. The crystalline phases are identified as Co6Al2CO3(OH)16·4H2O, which is attributed to the co-precipitation process occurring in the interaction between Co(II) and CaAl-Cl-LDH. The formation of the amorphous phases is due to surface complexation on amorphous Al(OH)3 hydrolyzed from CaAl-Cl-LDH.

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“…LDHs promising ion-exchangers 17 for applications to adsorb the PO 4 3À anion. [17][18][19][20][21][22][23][24][25][26][27][28][29][30] To efficiently adsorb PO 4…”

Section: àmentioning

confidence: 99%

“…, the interlayer anion choice will play a key role. Based on LDHs, there are some good options to use the Cl À anion, 17,20,[22][23][24]31 or NO 3 À anion, 19,21,32 or Cl À and SO 4 2À anions 25 as the interlayer anion. They can be used to adsorb PO 4 3À effectively, but their adsorption efficiencies are inevitably affected by carbon dioxide (CO 2 ) or carbonate (CO 3 2À )…”

Section: àmentioning

confidence: 99%

Pretreatment by recyclable Fe₃O₄@Mg/Al-CO₃-LDH magnetic nano-adsorbent to dephosphorize for the determination of trace F⁻ and Cl⁻ in phosphorus-rich solutions

Chen

Tang

et al. 2020

RSC Adv.

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Comparison of adsorption and desorption of phosphate on synthesized Zn-Al LDH by two methods in a simulated soil solution

Cited by 104 publications

References 65 publications

Designing Dual-Effect Nanohybrids for Removing Heavy Metals and Different Kinds of Anions from the Natural Water

Designing Dual-Effect Nanohybrids for Removing Heavy Metals and Different Kinds of Anions from the Natural Water

Crystalline/Amorphous Blend Identification from Cobalt Adsorption by Layered Double Hydroxides

Pretreatment by recyclable Fe₃O₄@Mg/Al-CO₃-LDH magnetic nano-adsorbent to dephosphorize for the determination of trace F⁻ and Cl⁻ in phosphorus-rich solutions

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Comparison of adsorption and desorption of phosphate on synthesized Zn-Al LDH by two methods in a simulated soil solution

Cited by 104 publications

References 65 publications

Designing Dual-Effect Nanohybrids for Removing Heavy Metals and Different Kinds of Anions from the Natural Water

Designing Dual-Effect Nanohybrids for Removing Heavy Metals and Different Kinds of Anions from the Natural Water

Crystalline/Amorphous Blend Identification from Cobalt Adsorption by Layered Double Hydroxides

Pretreatment by recyclable Fe3O4@Mg/Al-CO3-LDH magnetic nano-adsorbent to dephosphorize for the determination of trace F− and Cl− in phosphorus-rich solutions

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Pretreatment by recyclable Fe₃O₄@Mg/Al-CO₃-LDH magnetic nano-adsorbent to dephosphorize for the determination of trace F⁻ and Cl⁻ in phosphorus-rich solutions