A facile one-pot hydrothermal synthesis of hydroxyapatite/biochar nanocomposites: Adsorption behavior and mechanisms for the removal of copper(II) from aqueous media

Jung, Kyung Won; Lee, Seon Yong; Choi, Jae Woo; Lee, Young Jae

doi:10.1016/j.cej.2019.03.102

Cited by 316 publications

(69 citation statements)

References 63 publications

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“…The amount of DOH solution adsorbed (mg. g -1 ) according to the equation [10] C 0 (mg. L -1 )is the initial concentration of drug (mg. L -1 ), C t (mg. L -1 ) is the concentration at any time and q t (mg. g -1 ) is the adsorption capacity of DOH adsorbed onto Al 2 O 3 powder at any time. At equilibrium, q e = q t and C e = C t ; therefore the amount of adsorbed q e (mg. g -1 ), calculated from V (L)is the solution volume and m is the weight of Al 2 O 3 powder [11,12].…”

Section: Methodsmentioning

confidence: 99%

Kinetics study of Removal Doxycycline drug from aqueous solution using Aluminum Oxide surface

et al. 2019

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T HE batch adsorption of doxycycline from aqueous solution using aluminum oxide under different experimental conditions was investigated in this study. The effect of initial concentration, sample volume, contact time and pH have been reported. A comparison of kinetic models applied to the adsorption of doxycycline on the adsorbents was evaluated for the pseudo first-order, the pseudo-second-order, Elovich, Fractional power and intra particle diffusion kinetic models were utilized to the adsorption data in respect of investigating the kinetic process; kinetic data were best fitted to the pseudo-second-order model validated by normalized standard deviation (NSD), average relative error (ARE) and chi-square test (Chi-X2). The result suggested that the intra particle diffusion was one of the rate-limiting steps.

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Section: Methodsmentioning

confidence: 99%

Kinetics study of Removal Doxycycline drug from aqueous solution using Aluminum Oxide surface

et al. 2019

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“…The results are listed in Table . The PAG adsorption capacity for Cu(II) was higher than that of almost all listed existing adsorbent materials (9.50–214 mg g −1 ) . However, these existing adsorbent materials were usually difficult to prepare owing to the complex and expensive synthesis process required.…”

Section: Resultsmentioning

confidence: 99%

A facilely synthesized polyanionic gel adsorbent with high adaptability and new adsorption effects for purification of Cu(II)‐containing wastewater

Song

Bai

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Cu(II)-containing wastewater causes serious pollution of the water environment. Adsorption is one of the most commonly used water purification methods, with the selection of suitable adsorbents being the key factor. This motivates the development of new efficient adsorbents to purify Cu(II)-containing wastewater. RESULTS:A highly adaptable polyanionic gel (PAG) was synthesized by the facile crosslinking copolymerization of acrylic acid (AA) and triallylmethylammonium chloride (TAMAC) at 65 ∘ C for 0.5 h, followed by a simple neutralization treatment, avoiding the inconvenience of the complex and expensive preparation process required to prepare existing adsorbents. When first used as an adsorbent material, PAG achieved highly efficient purification of a wide concentration range of 10-2000 mg L −1 Cu(II)-containing wastewater. The PAG adsorption capacity for Cu(II) was 222.2 mg g −1 , which was higher than the values of selected existing adsorbent materials (9.50-214 mg g −1 ), and PAG had the advantages of being eco-friendly, facilely obtained and regenerable. Also, PAG maintained stable adsorption ability even when the adsorption temperature varied from 30 to 50 ∘ C. Moreover, a series of new adsorption effects were first observed as the key factors for PAG adsorption to achieve high adaptability.CONCLUSION: Generally, considering the comprehensive performances, PAG would have higher adaptability in the efficient purification of different concentrations and different temperatures of Cu(II)-containing wastewater. It would thus have better application in different water environments and be regarded as a better adsorbent alternative.

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“…The adsorption behavior of divalent metal ions onto mesoporous material can be described by Langmuir and Freundlich isotherm models. 37 Table 1 shows the fitted parameters of Langmuir and Freundlich models. The Langmuir isotherm model can accurately describe the adsorption of Ba 2+ by MAS mesoporous material, and the correlation coefficient ( R 2 ) is >0.995.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Recovery of Display Panel Waste Glass and Wastewater Boron by Chemical Oxo-precipitation with Fluidized-Bed Heterogeneous Crystallization

et al. 2019

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Silica-based carrier is a promising material for recovery of metal and nonmetal contaminants in chemical oxo-precipitation-fluidized bed crystallization (COP-FBC) system. Boron species are an essential element for plant growth and can cause health concerns in human beings at high concentrations in water environments. The composition of thin-film transistor liquid crystal display (TFT-LCD) contains a wide variety of metal oxides and can be tailored as promising functional mesoporous carriers for boron crystallization recovery in the presence of barium ions and hydrogen peroxide. In this study, waste-derived mesoporous aluminosilicate (MAS) nanomaterial in the presence of barium ions and hydrogen peroxide was used as a carrier for sustainable recovery of crystallized boron, a priority wastewaters pollutant. The MAS shows the hierarchically homogeneous distribution of nanostructured aluminosilicate particles with an average size of 12.8 ± 3.6 nm on the surface after the activation with Na 2 CO 3 at 1000 °C. Moreover, the negatively charged surface and the mesoporous structure of MAS enhance the adsorption of Ba 2+ onto MAS, and the Langmuir adsorption capacity of 105 mg/g is achieved, which is conducive to the enhancement of the recovery of boron species. Moreover, the recovery efficiency and crystallization ratio of boron by MAS can be up to 84.5 and 93.4%, respectively. The cross-sectional scanning electron microscopy images and the high-temperature X-ray diffraction results confirm the boron recovery mechanism that the negatively charged functional group as well as the mesoporosity of MAS triggers the rapid formation of needle-shaped precipitates of barium peroxoborate, and then converted to barium borate after calcination at 1050 °C. Results obtained in this study clearly demonstrate the possibility of fabricating environmentally benign mesoporous aluminosilicate adsorbents from TFT-LCD waste to sustainably recover and crystallize boron species from water and wastewater in COP-FBC.

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A facile one-pot hydrothermal synthesis of hydroxyapatite/biochar nanocomposites: Adsorption behavior and mechanisms for the removal of copper(II) from aqueous media

Cited by 316 publications

References 63 publications

Kinetics study of Removal Doxycycline drug from aqueous solution using Aluminum Oxide surface

Kinetics study of Removal Doxycycline drug from aqueous solution using Aluminum Oxide surface

A facilely synthesized polyanionic gel adsorbent with high adaptability and new adsorption effects for purification of Cu(II)‐containing wastewater

Simultaneous Recovery of Display Panel Waste Glass and Wastewater Boron by Chemical Oxo-precipitation with Fluidized-Bed Heterogeneous Crystallization

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