Simultaneous removal of arsenic and fluoride by freshly-prepared aluminum hydroxide

Liu, Ruiping; Zhu, Lijun; He, Zan; Lan, Huachun; Liu, Huijuan; Qu, Jiuhui

doi:10.1016/j.colsurfa.2014.10.007

Cited by 30 publications

(9 citation statements)

References 20 publications

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“…A wide range of point‐of‐use treatment techniques has been developed in past decades to remove both anions (i.e. As and F − ) from waters, including reverse osmosis (RO), nanofiltration (NF), ion exchange, electrocoagulation, and adsorption . Of these techniques, adsorption is the most cost‐effective technique with high performance …”

Section: Introductionmentioning

confidence: 99%

“…Adsorption of As(V) or F − from aqueous solution has been extensively studied over the last two decades with a focus on development of high‐efficiency, low‐cost and environmentally‐benign adsorbents . A wide variety of adsorbents were developed to remove As(V) and F − from drinking water, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…A wide variety of adsorbents were developed to remove As(V) and F − from drinking water, e.g. Al‐based adsorbents including activated alumina (AA), aluminium hydroxide, and mesoporous alumina have been used to remove As(V) and F − from aqueous solutions. Fe‐based materials such as goethite, goethite‐ and hematite‐coated sand, and granular ferric oxides (GFO) have also been employed as adsorbents for aqueous As(V) and F − .…”

Section: Introductionmentioning

confidence: 99%

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Evaporation‐induced self‐assembly (EISA) synthesized mesoporous bimetallic oxides (MBOs) enabling enhanced co‐uptake of arsenate and fluoride from water

Jin

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: Simultaneous removal of arsenic and fluoride anions from water by adsorption remains a challenge for environmental remediation practice. To address this issue, four mesoporous bimetallic oxides (MBOs) were prepared via the evaporation-induced self-assembly (EISA) method and studied as adsorbents for the co-uptake of arsenate (As(V)) and fluoride (F − ) from synthetic wastewater. Adsorption envelope and equilibrium experiments were performed to investigate the adsorption behaviors and properties.RESULTS: These composites possessed high surface areas (e.g. 200 m 2 g −1 for meso-Ti/Al) and well-defined mesopores, enabling high adsorption capacities for both As(V) and F − . The maximum adsorption capacities of mesoporous titanium-lanthanum oxide (meso-Ti/La) were as high as 81.42 mg g −1 and 44.37 mg g −1 for As(V) and F − , respectively. Surface complexation modeling indicates that As(V) removal mainly involved bidentate surface complexation with surface ≡Me-OH, while F − was retained by formation of monodentate surface complexes. CONCLUSION: The removal mechanisms were confirmed by X-ray photoelectron spectroscopy. These MBOs were found to be effective for simultaneous removal of arsenic and fluoride from water. This study also demonstrated that the incorporation of multi-components and mesoporosity into one composite is an efficient strategy for design and application of high-efficiency adsorbents for environmental remediation of aqueous contaminants.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaporation‐induced self‐assembly (EISA) synthesized mesoporous bimetallic oxides (MBOs) enabling enhanced co‐uptake of arsenate and fluoride from water

Jin

et al. 2018

J of Chemical Tech & Biotech

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“…[24][25][26] In the two-site Langmuir model, q 1 and q 2 (mg·g ) are the adsorption capacities for the high-and low-energy sites on the surface of adsorbent respectively, and the q t (mg·g ) are the corresponding af nity coef cients for adsorbate. 17,18,25,27) The k (mg…”

Section: Fluoride Adsorption By the Samplesmentioning

confidence: 99%

Binary Systems of Kaolinite and Hematite: Preparation, Characterization and Adsorption Characteristics for Fluoride

et al. 2016

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In soils and sediments kaolinite (Kao) and hematite (Hem) are often cemented together as binary systems, which have a signi cant in uence on the mobility of nutrients and pollutants in natural environments. In this study, the binary systems of kaolinite-hematite complex (KHC) and kaolinite-hematite mixture (KHM) were prepared, and the surface properties and uoride adsorption of the samples were investigated. Compared to KHM, the XRD peaks for both kaolinite and hematite in KHC were lower. The crystallinity of hematite in KHM and KHC was 94.13% and 80.99% respectively. This indicates that the surface of kaolinite in KHC was largely coated by poorly crystalline hematite, and the coating in KHM was relatively weak. The total pore volume of the samples followed the sequence of Hem > KHC > KHM > Kao, and the speci c surface area (SSA) decreased in the order of KHC > Hem > KHM > Kao. The isoelectric point (IEP) of Kao, Hem, KHM and KHC was 3.3, 7.6, 5.9 and 6.5, and the zeta potential at pH 5.5 was −18.6, 25.3, 2.8 and 10.3 mV, respectively. The uoride adsorption data of the samples were tted using one-site Langmuir, two-site Langmuir and Freundlich models, and results indicated that the binary systems possessed the surface with various adsorption sites for uoride. At pH 5.5, the adsorption capacity (q max ) of Kao, Hem, KHM and KHC was 1.92, 13.79, 7.48 and 10.46 mg·g −1 , respectively. Compared to the average of Kao and Hem, the q max of KHC increased signi cantly (P < 0.05), whereas that of KHM had no signi cant change (P > 0.05).

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“…Among these technologies, adsorption has been widely studied because it is easy to operate and cost-effective. Many materials have been studied as the adsorbents for arsenic removal from aqueous solutions including magnetite-reduced graphene oxide, graphene oxide-MnFe 2 O 4 magnetic nanohybrids, granular activated carbon based adsorbents, iron based adsorbents, nanoscale zero valent iron, three-dimensional graphene-carbon nanotube-iron oxide nanostructures, DNA aptamers, Fe 3 O 4 nanoparticles, chemically modified sawdust, metal (hydr) oxide coated sand, South African sands, aluminum hydroxide and zeolitic imidazolate framework-8 (ZIF-8) nanoparticles [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Up to date, the development of new materials for arsenic removal still a hot topic in environmental field.…”

Section: Introductionmentioning

confidence: 99%

Removal of As(III) and As(V) from Water Using Magnetic Core-Shell Nanomaterial Fe3O4@Polyaniline

Zhou¹

2018

Int. J. Green Technol.

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Arsenic pollution is an important hot topic in environmental field, and it is of great value to develop new methods for removal of arsenic pollution. Present study reported a magnetic core-shell material, polyaniline coated Fe3O4 (Fe3O4@PANI) synthesized using a simple two-step polymerization method, which was characterized by transmission electron microscopy(TEM), scanning electron microscope(SEM), FT-IR, X-ray diffraction(XRD), and a vibrating sample magnetometer(VSM) to confirm microstructure and morphology of the hybrid materials. As(III) and As(V) were used as the model analytes and the various parameters such as pH, adsorbent dosage, contact time, coexisting ions and humic acid were investigated. Under optimal conditions, the adsorption of arsenic followed pseudosecond-order kinetics, and the adsorption isotherms conformed to Freundlich adsorption isotherm model. The adsorption capacity (qmax) of Fe3O4@PANI for arsenite and arsenate in terms of monolayer adsorption were 1.066 and 1.385 mg/g, respectively. The adsorption was spontaneous and exothermic process. These results indicated that present study provided a rapid, easy to separate, and low cost method for the removal of As(III) and As(V), and would have great prospect in the removal and remediation of pollutants.

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Simultaneous removal of arsenic and fluoride by freshly-prepared aluminum hydroxide

Cited by 30 publications

References 20 publications

Evaporation‐induced self‐assembly (EISA) synthesized mesoporous bimetallic oxides (MBOs) enabling enhanced co‐uptake of arsenate and fluoride from water

Evaporation‐induced self‐assembly (EISA) synthesized mesoporous bimetallic oxides (MBOs) enabling enhanced co‐uptake of arsenate and fluoride from water

Binary Systems of Kaolinite and Hematite: Preparation, Characterization and Adsorption Characteristics for Fluoride

Removal of As(III) and As(V) from Water Using Magnetic Core-Shell Nanomaterial Fe3O4@Polyaniline

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