Selective adsorption of fluoride from drinking water using NiAl-layered metal oxide film electrode

Ni/Al layered double hydroxide was used as a starting material for composite formation with biochar as a matrix. The materials were characterized using X-ray, FTIR, nitrogen adsorption-desorption, thermal, and morphology analyses. The NiAl LDH/Biochar material is then used as an adsorbent of methylene blue from an aqueous solution. The factor that was influencing adsorption such as pH, time, methylene blue concentration, and temperature adsorption was studied systematically. The regeneration of adsorbent was performed to know the stability of NiAl LDH/Biochar under several cycle adsorption processes. The results showed that NiAl LDH/Biochar has a specific diffraction peak at 11.63° and 22.30°. NiAl LDH/Biochar has more than ten-fold surface area properties (438,942 m2/g) than biochar (50.936 m2/g), and Ni/Al layered double hydroxide (92.682 m2/g). The methylene blue adsorption on NiAl LDH/Biochar follows a pseudo-second-order kinetic adsorption model and classify as physical adsorption. The high reusability properties were found for NiAl LDH/Biochar, which was largely different from biochar and Ni/Al layered double hydroxide.

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“…Fig. 2(a [29]. These results are appropriate with Tao et al (2019) where the crystallinity of Ni/Al LDH was high [30].…”

Section: ■ Results and Discussionsupporting

confidence: 54%

High Reusability of NiAl LDH/Biochar Composite in the Removal Methylene Blue from Aqueous Solution

et al. 2021

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“…In combination with the hydration radius in Table 2, it was found that most of the ions conformed to this law. In particular, the higher adsorption of CO3 2may be due to the ease of binding to hydroxyl groups in solution to generate CO2 and H2O (Bai et al 2019).…”

Section: Removal Law Of Anions and Cationsmentioning

confidence: 99%

Experimental and theoretical study of a new CDI device for the treatment of desulfurization wastewater

Liu

et al. 2021

Environ Sci Pollut Res

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“…Another study [60] deployed an electrosorption method (capacitive deionization) with NiAl LMO (nickel aluminumlayered metal oxide) in order to selectively remove excess fluoride ions from water. In this sophisticated method of fluoride removal, effective adsorption and regeneration via applying a reverse voltage of adsorbent is well ensured.…”

Section: Layered Double Hydroxides (Ldhs)mentioning

confidence: 99%

Fluoride in Drinking Water and Nanotechnological Approaches for Eliminating Excess Fluoride

Premathilaka

Liyanagedera

2019

Journal of Nanotechnology

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Arising awareness of health hazards due to long-term exposure of fluoride has led researchers to seek for more innovative strategies to eliminate excess fluoride in drinking water. Fluoride-bearing chemicals in both natural and anthropogenic sources contaminate drinking water, which mainly cause for human fluoride ingestion. Hence, developing sustainable approaches toward alleviation is essential. Among many emerging techniques of defluoridation, nanotechnological approaches stand out owing to its high efficiency, and hence, as in many areas, nanotechnology for excess fluoride removal in water is gaining ground compared to other conventional adsorbents and process. The present review focuses on some of the advanced and recent nanoadsorbents including their strengths and shortcomings (e.g., CNT, LDH, graphene-based nanomaterials, and magnetic nanomaterials) and other processes involving nanotechnology while discussing basic aspects of hydrochemistry of fluoride and geological conditions leading for water fluoride contamination. Considering all the findings in survey, it is evident that developing more sustainable techniques is essential rather than conducting batch-type experiments solely.

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Selective adsorption of fluoride from drinking water using NiAl-layered metal oxide film electrode

Cited by 80 publications

References 19 publications

High Reusability of NiAl LDH/Biochar Composite in the Removal Methylene Blue from Aqueous Solution

High Reusability of NiAl LDH/Biochar Composite in the Removal Methylene Blue from Aqueous Solution

Experimental and theoretical study of a new CDI device for the treatment of desulfurization wastewater

Fluoride in Drinking Water and Nanotechnological Approaches for Eliminating Excess Fluoride

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