Synchronous phosphate and fluoride removal from water by 3D rice-like lanthanum-doped La@MgAl nanocomposites

Kong, Lingchao; Tian, Yu; Pang, Zheng; Huang, Xiaohong; Li, Ming; Yang, Ruochen; Li, Ning; Zhang, Jun; Zuo, Wei

doi:10.1016/j.cej.2019.04.116

Cited by 162 publications

(32 citation statements)

References 40 publications

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“…Research conducted by Kong et al [30] on the removal of phosphate and fluoride using rice lanthanum doped nanocomposite reported that the surface area of the nanocomposite is 123.28 m 2 g −1 . e point zero charge for both TSBC and LDMTSB is shown in Figure 1.…”

Section: Teff Straw Biochar and Magnetic Biochar Modifiedmentioning

confidence: 99%

Novel Lanthanum Doped Magnetic Teff Straw Biochar Nanocomposite and Optimization Its Efficacy of Defluoridation of Groundwater Using RSM: A Case Study of Hawassa City, Ethiopia

Amibo

Beyan

Damite

2021

Advances in Materials Science and Engineering

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The problem extent of the large concentration of fluoride ions in drinking water is still a central health issue. In the present study, lanthanum doped magnetic Teff straw biochar (LDMTSB) was developed as a novel adsorbent for removing fluoride ions in the groundwater in Rift-Valley regions, especially Hawassa city, Ethiopia. The synthesized LDMTBC was characterized via FTIR, XRD, SEM, and BET. And, this analysis proposed that multiadsorption techniques such as ligand exchange, precipitations, and electrostatic interaction could be evinced throughout the fluoride ions adsorption process by LDMTSB. The constraints that influence the adsorption efficacy, namely, a dosage of LDMTSB, contact time, pH of the solution, and rotational speed, were analyzed and optimized using the response surface methodology approach. Under the optimum situations, LDMTSB dosage: 3.97 g, contact time: 56.36 min, rotational speed: 591.19 rpm, and pH: 3.968 demonstrate high efficacy of LDMTSB with 98.89% fluoride removal capacity. Further, the quadratic model (R2 = 0.9841) was designated for governing the mathematical process. The LDMTSB was successful in the removal of fluoride ions in the groundwater. This study provides a valuable economical solution for the application of Teff straw.

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Section: Teff Straw Biochar and Magnetic Biochar Modifiedmentioning

confidence: 99%

Novel Lanthanum Doped Magnetic Teff Straw Biochar Nanocomposite and Optimization Its Efficacy of Defluoridation of Groundwater Using RSM: A Case Study of Hawassa City, Ethiopia

Amibo

Beyan

Damite

2021

Advances in Materials Science and Engineering

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“…LDHs are stable nanostructures due to the strong electrostatic interactions and hydrogen bonding within and between the brucitelike layers [18]. Due to their advantageous characteristics, LDHs have been extensively used in catalysis [19][20][21][22], drug delivery [23][24][25][26], substrate extraction [27][28][29][30][31], pollutant degradation [32][33][34][35], and other applications [36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Kim

Varga

Adhikari³

et al. 2021

Nanomaterials

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Layered double hydroxides (LDHs) have attracted considerable attention as promising materials for electrochemical and optical sensors owing to their excellent catalytic properties, facile synthesis strategies, highly tunable morphology, and versatile hosting ability. LDH-based electrochemical sensors are affordable alternatives to traditional precious-metal-based sensors, as LDHs can be synthesized from abundant inorganic precursors. LDH-modified probes can directly catalyze or host catalytic compounds that facilitate analyte redox reactions, detected as changes in the probe’s current, voltage, or resistance. The porous and lamellar structure of LDHs allows rapid analyte diffusion and abundant active sites for enhanced sensor sensitivity. LDHs can be composed of conductive materials such as reduced graphene oxide (rGO) or metal nanoparticles for improved catalytic activity and analyte selectivity. As optical sensors, LDHs provide a spacious, stable structure for synergistic guest–host interactions. LDHs can immobilize fluorophores, chemiluminescence reactants, and other spectroscopically active materials to reduce the aggregation and dissolution of the embedded sensor molecules, yielding enhanced optical responses and increased probe reusability. This review discusses standard LDH synthesis methods and overviews the different electrochemical and optical analysis techniques. Furthermore, the designs and modifications of exemplary LDHs and LDH composite materials are analyzed, focusing on the analytical performance of LDH-based sensors for key biomarkers and pollutants, including glucose, dopamine (DA), H2O2, metal ions, nitrogen-based toxins, and other organic compounds.

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“…First, it possesses abundant positive charges and surface hydroxyl groups, which directly bind orthophosphate and organic phosphorus via electrostatic attraction and surface complexation (see the shifts of XPS Mg 2p and Fe 2p spectra before and after P adsorption in Figure S14 in the SI). 68 Second, the tunable interlayer region of the host not only provides space to embed lanthanum hydroxides nanoparticles but also allows the exchange of phosphate anions with bicarbonate and further capture by the loaded La species (see Scheme 1a). Third, the small interlayer distance (ca.…”

Section: Resultsmentioning

confidence: 99%

Phosphorus Binding by Lanthanum Modified Pyroaurite-like Clay: Performance and Mechanisms

et al. 2021

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In situ immobilization of phosphorus (P) by using P binding agents is a facile and effective strategy for eutrophication control. Currently, the most successful commercial agent (Phoslock, a lanthanum modified bentonite, LMB) still suffers low P removal efficiency from natural waters of complex chemistry, largely due to the competitive complexation of the active La species by humic substances (HAs) and bicarbonate. Herein, we describe an attempt to address these issues by intercalating La into Mg/Fe layered double hydroxides, a pyroaurite-like anionic clay, to obtain a hybrid agent (denoted L-CMF-1.0) of phosphate capacity five times higher than that of LMB. More attractively, the binding stability and capacity of L-CMF-1.0 toward P were significantly enhanced in the presence of HAs and bicarbonate, resulting in a high La usage (P/La ratio at ∼1.30). A continuous P immobilization test in the simulated natural waters validates that the addition of L-CMF-1.0 at 0.12 g/L could result in an efficient P removal from 580 μg/L to <100 μg/L within 38 days, outperforming LMB within 10 days only under otherwise identical conditions. Such improvement results from the rational design of the agent structure, i.e., the host, not only contributes to the direct P uptake but also provides a flexible nanoshelter microenvironment to favor the specific La− P interaction under complex solution chemistry. This work is believed to shed new light on the rational design of P binding agent for enhanced eutrophication control.

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Synchronous phosphate and fluoride removal from water by 3D rice-like lanthanum-doped La@MgAl nanocomposites

Cited by 162 publications

References 40 publications

Novel Lanthanum Doped Magnetic Teff Straw Biochar Nanocomposite and Optimization Its Efficacy of Defluoridation of Groundwater Using RSM: A Case Study of Hawassa City, Ethiopia

Novel Lanthanum Doped Magnetic Teff Straw Biochar Nanocomposite and Optimization Its Efficacy of Defluoridation of Groundwater Using RSM: A Case Study of Hawassa City, Ethiopia

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Phosphorus Binding by Lanthanum Modified Pyroaurite-like Clay: Performance and Mechanisms

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