Hydrothermally synthesized lanthanum carbonate nanorod for adsorption of phosphorus: Material synthesis and optimization, and demonstration of excellent performance

Koh, Kok Yuen; Zhang, Sui; Chen, Jiaping

doi:10.1016/j.cej.2019.122153

Cited by 147 publications

(38 citation statements)

References 51 publications

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“…Among them, adsorption is usually regarded as a simple and convenient method. Further research has been done in recent years to search for adsorbent materials suitable for industrial production with high adsorption efficiency [6][7][8][9][10][11][12]. Studies have shown that phosphorus in eutrophic water exists as free phosphate, and a large amount of metal oxide/hydroxide has been used in phosphorus removal because of its specific affinity for phosphate including hydrous ferric oxide [13], magnetite [14], hydrous manganese oxide [15], aluminum hydroxide gel [16], lanthanum hydroxide [17], cerium oxide [18], titanium dioxide [19], hydrous niobium oxide [20], and zirconium oxide/hydroxide [21,22], etc.…”

Section: Introductionmentioning

confidence: 99%

Removal of Phosphorus from Wastewater by Different Morphological Alumina

et al. 2020

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In this work, an organic-free method was used to synthesize different morphological boehmite by controlling the crystallization temperature, and alumina adsorbents were obtained by baking the boehmites at 500 °C. The alumina adsorbents were characterized by X-ray diffraction (XRD), High resolution transmission electron microscope (HRTEM), Fourier transform infrared (FT-IR), N2 adsorption/desorption analysis, and their phosphorus adsorption properties were comparatively investigated by a series of experiments. The results showed that the self-prepared alumina adsorbents were lamellar and fibrous material, while the industrial adsorbent was a granular material. The lamellar alumina adsorbents had the largest specific surface area and showed better phosphorus adsorption capacity. The maximum adsorption capacity could reach up to 588.2 mg·g−1; and only 0.8 g·L−1 of lamellar alumina adsorbent is needed to treat 100 mg·L−1 phosphorus solution under the Chinese level 1 discharge standard (0.5 mg·L−1). Further investigation suggests that the lamellar alumina adsorbent kept high adsorption capacity in various solution environments.

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Section: Introductionmentioning

confidence: 99%

Removal of Phosphorus from Wastewater by Different Morphological Alumina

et al. 2020

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“…Since adsorption is not a destructive technique, some materials release the nutrient after the treatment, thus attending the demands of a circular economy (Kasprzyk and Gajewska, 2019). Recent research has proposed a variety of adsorbents including layered chalcogenide (Li et al, 2019), nano-porous calcined palygorskite embedded with La(OH) 3 (Kong et al, 2018), acid-activated akadama clay (a Japanese volcanic soil) (Wang et al, 2018), magnetically recoverable magnetite/lanthanum hydroxide (Fang et al, 2018), hydrothermally synthesized lanthanum carbonate nanorods (Koh et al, 2020), thermally activated dolomite (Ivanets et al, 2015(Ivanets et al, , 2016, zirconium/magnesium modified bentonite (Lin et al, 2020), etc. Clay minerals have gained interest because they are abundant in nature and are environmentally compatible. Montmorillonites, like other smectites, have permanent negative charges generated by the isomorphic substitutions of Si 4þ by Al 3þ in the tetrahedral sheets, and of Al 3þ by Mg 2þ in the octahedrons.…”

Section: Introductionmentioning

confidence: 99%

Fe(III)-polyhydroxy cations supported onto K10 montmorillonite for removal of phosphate from waters

Leite

Nascimento

Masini

2020

Heliyon

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Since phosphate is strongly related to eutrophication of environmental waters, several research groups quest for materials that can efficiently remove phosphate from wastewaters before it contaminates lakes and reservoirs. In the present work, a commercial clay mineral (K10 montmorillonite) modified with Fe 3þ polyhydroxy cations was investigated as an adsorbent for phosphate. The incorporation of the polycations did not alter the main conformational characteristics of the montmorillonite, as verified by specific surface area measurements, X-ray diffractometry, FTIR, electron microscopy, and zeta potential titrations. On the other hand, the materials supporting Fe 3þ polyhydroxy cations exhibited a significant enhancement of adsorption capacity, as determined by Langmuir-Freundlich isotherms, from 39 AE 2 to 104 AE 15 μmol g À1 . The different ratios of OH À to Fe 3þ did not affect the adsorption capacities. The adsorption kinetics was best described by the pseudo 2 nd order model, approaching the equilibrium after 120 min of contact time. A variation of pH between 4.6 and 8.5 did not affect the adsorption percentages. The adsorption capacities increased with the increase of the ionic strength, thus suggesting that the formation of inner-sphere complexes prevails over electrostatic interactions as the adsorption mechanism. The materials removed phosphate from three polluted water samples having phosphate concentrations between 0.0919 and 1.211 mg L À1 . The remaining phosphate concentration was below the limit of quantification of the analytical method (0.063 mg L À1 in P, or 2.0 μmol L À1 ). The presence of 10 mg L À1 humic of fulvic acid did not affect the performance of the materials. In conclusion, the modification of clay minerals with Fe 3þ polyhydroxy cations is useful in producing low-cost adsorbents for phosphate.

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“…The mixed solution was stirred for 2 h to reach the equilibrium. The point of zero charge (pH pzc ) was also determined using the potentiometric mass titration method (Koh et al 2020). The surface charge of adsorbent is negative at pH .…”

Section: Effect Of Ph and Adsorbent Dosagementioning

confidence: 99%

Enhanced removal of arsenic from aqueous solution by novel red mud porous beads: batch and column experiments

Yin

Guo

et al. 2022

Water Supply

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Arsenic contamination in groundwater and river has become a major problem around the world, which may cause severe environment pollution and human health problem. In this study, a cost-efficient adsorbentred mud porous beads (RPB), using red mud – a kind of alumina industry by-product, was synthesized for adsorptive removal of arsenic(V) from aqueous solution. Kinetic studies showed that chemisorption mainly governed the adsorption process. The experimental data was fitted well by Langmuir isotherm, and the equilibrium adsorption capacity for arsenic of 11.758 mg/g at pH = 7 condition. The effect of pH showed that the pHpzc of RPB was 6.0 and at pH = 6 the removal rate reached nearly 100%. The removal rate decreased from 91.3% to 79.0% with the increasing of initial concentration of arsenic from 2.5 to 20 mg/L. The adsorption performance from column studies illustrated that the velocity of flow and the initial concentration influenced the breakthrough time of the column. This study would facilitate the use of red mud, which can be fabricated into RPB, acting as a valuable adsorbent for removing arsenic in aqueous solution.

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Hydrothermally synthesized lanthanum carbonate nanorod for adsorption of phosphorus: Material synthesis and optimization, and demonstration of excellent performance

Cited by 147 publications

References 51 publications

Removal of Phosphorus from Wastewater by Different Morphological Alumina

Removal of Phosphorus from Wastewater by Different Morphological Alumina

Fe(III)-polyhydroxy cations supported onto K10 montmorillonite for removal of phosphate from waters

Enhanced removal of arsenic from aqueous solution by novel red mud porous beads: batch and column experiments

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