Lanthanum/Gemini surfactant-modified montmorillonite for simultaneous removal of phosphate and nitrate from aqueous solution

Luo, Wuhui; Huang, Qidong; Zhang, Xiaomei; Antwi, Philip; Mu, You; Zhang, Meng; Xing, Jialiang; Chen, Hongwen; Ren, Sili

doi:10.1016/j.jwpe.2019.101036

Cited by 29 publications

(3 citation statements)

References 54 publications

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“…In the first case, most of the adsorbent pores were empty and the adsorption occurred rapidly. However, with the passage of time and the gradual filling of the pores, the penetration of the contaminant ions through the adsorbed ions and the bonding to the vacant surfaces slowed the adsorption process (23,24). Similar studies have been conducted by researchers to investigate the effect of time on the removal rates of nitrite, phosphate, and ammonia.…”

Section: Effect Of Contact Timementioning

confidence: 87%

Application of Chitosan and Activated Carbon Nano-composite in Removal of Nitrite, Phosphate, and Ammonia From Aquaculture Wastewater

Rezaei

Rastegar

Naseri

2019

Avicenna J Environ Health Eng

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Developing an adsorbent with natural components is one of the effective methods to reduce the amount of wastewater pollutants. Wastewater reuse can improve the quality of water prior to entering the natural environment. The aim of this study was to evaluate the efficiency of chitosan nano-composite and activated carbon adsorbent in the removal of nitrite, phosphate, and ammonia pollutants from fish farms of Aq-Qala. To prepare the adsorbents, the shrimp shells were converted to nano-chitosan. The date palm kernel was prepared and activated with oxalic acid in pyrolysis furnace by injecting nitrogen gas into activated carbon, then, the nano-composite was prepared from nanochitosan and activated carbon. A field-laboratory study was conducted during the winter of 2018, and then, batches of synthesized nano-composite were investigated and the effects of pH, initial effluent concentration, and adsorption time were investigated. The experiments were performed in the pH range of 5-8, effluent concentration of 25-100 mg/L, and contact time of 15-90 minutes. The results showed that at optimum conditions (pH of 7, effluent concentration of 50 mg/L, and contact time of 60 minutes), the highest removal percentage and adsorption capacity for nitrite, phosphate, and ammonia contaminants were 99.98%, 99.77%, and 65.65%, and 6.65, 6.14, and 7.32 mg/g , respectively. Due to the high removal percentage (99.98%) of the chitosan and activated carbon nano-composite, the adsorbent was highly capable of removing pollutants (nitrite, phosphate, and ammonia).

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Section: Effect Of Contact Timementioning

confidence: 87%

Application of Chitosan and Activated Carbon Nano-composite in Removal of Nitrite, Phosphate, and Ammonia From Aquaculture Wastewater

Rezaei

Rastegar

Naseri

2019

Avicenna J Environ Health Eng

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“…The La-and La/CTAC-modified biochar composites were prepared following the method of Luo et al (2020), and this involved the combination of a simple co-precipitation and an organic modification method. Approximately 5 g of the ECL was added to 50 ml of a solution containing 1.0 mol L −1 of LaCl 3 and the mixture was shaken for 6 h. This was followed by a dropwise addition of 0.5 mol L −1 of NaOH to produce a solution with a pH of 11.5, and this caused precipitation of La 3+ .…”

Section: Preparation and Characterization Of Biochar Composites 221 P...mentioning

confidence: 99%

Remediation of nitrate contaminated groundwater using a simulated PRB system with an La–CTAC–modified biochar filler

Wu²,

Nie³

et al. 2022

Front. Environ. Sci.

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In the present study, the Erigeron canadensis L., a typical invasive plant in Southwest China, was utilized as the raw material to prepare original biochar (ECL), a rare earth element La–modified biochar (La–ECL), and a rare earth element La coupling cationic surfactant [cetyltrimethylammonium chloride (CTAC)]–modified biochar (La/CTAC–ECL). These materials were then added to simulated permeable reactive barriers (PRBs) and their nitrate (NO3−) contaminant remediation performances were evaluated in groundwater. The results show that the breakthrough time for NO3− in a simulated PRB column increases as the concentration of the influent NO3− and the flow rate decreases, whereas with the increases of filler particle size and the height of the filler in the column initially increases, and then decreases. Considering an initial NO3− concentration of 50 mg L−1, and a filler particle size range of 0.8–1.2 mm, the maximum adsorption capacity of the La/CTAC–ECL column for NO3− is 18.99 mg g−1 for a filler column height of 10 cm and an influent flow rate of 15 ml min−1. The maximum quantity of adsorbed NO3− of 372.80 mg is obtained using a filler column height of 15 cm and an influent flow rate of 10 ml min−1. The Thomas and Yoon–Nelson models accurately predict the breakthrough of NO3− in groundwater in the simulated PRB column under different conditions, and the results are consistent with those from dynamic NO3− adsorption experiments. TEM, XRD, FTIR, and XPS analyses demonstrate that the modification using the La and CTAC improves the surface structure, porosity, permeability, and configuration of functional groups of the biochar. The mechanisms of NO3− removal from groundwater using the La/CTAC–ECL include pore filling, surface adsorption, ion exchange, and electrostatic adsorption. The composite La/CTAC–ECL exhibits a superior potential for the remediation of NO3− contaminated groundwater.

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“…[4,5]. Gemini surfactants have a wide range of applications due to their unique properties, including enhanced oil recovery [6], transfection of genes [7], RNAdelivery [8] Inhibition of iron corrosion [9,10], and environmental protection [11][12][13]. Environmental friendly products to replace traditional surfactants can become a major trend as a result of rising governmental pressure and environmental protection.…”

Section: Introductionmentioning

confidence: 99%

Ester-Gemini and Monomeric Cationic Surfactants; Synthesis, Characterization, Surface Parameters and Biological Activity

et al. 2021

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Gemini cationic surfactant is a promising generation of surfactants characterized by their unique surface properties and biological activities. Herein, a series of three Gemini cationic surfactants containing ester bond with different alkyl chain length and their corresponding monomeric structures have been synthesized. The monomeric surfactant were synthesized via simple esterification of different fatty acids (stearic, myrisitic, lauric acid) with 2-dimethyl amino ethanol, followed by quaternization with 1-bromohexane; while, and 1,6-dibromohexane was used to prepare the corresponding Gemini cationic surfactants. The structures of the synthesized compounds were elucidated using 1 H-NMR, FTIR spectroscopy. The biological activities and surface properties have been assayed and it was found that the prepared Gemini surfactants have higher antimicrobial efficiencies than the corresponding monomeric structure.

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Lanthanum/Gemini surfactant-modified montmorillonite for simultaneous removal of phosphate and nitrate from aqueous solution

Cited by 29 publications

References 54 publications

Application of Chitosan and Activated Carbon Nano-composite in Removal of Nitrite, Phosphate, and Ammonia From Aquaculture Wastewater

Application of Chitosan and Activated Carbon Nano-composite in Removal of Nitrite, Phosphate, and Ammonia From Aquaculture Wastewater

Remediation of nitrate contaminated groundwater using a simulated PRB system with an La–CTAC–modified biochar filler

Ester-Gemini and Monomeric Cationic Surfactants; Synthesis, Characterization, Surface Parameters and Biological Activity

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