Phosphorus Removal From Aqueous Solution By Adsorption Onto La-modified Clinoptilolite

Tu, Can; Wang, Shibo; Qiu, Weixia; Xie, Ruosong; Hu, Bocai; Qu, Guangfei; Ning, Ping

doi:10.1051/matecconf/20166707013

Cited by 8 publications

(4 citation statements)

References 32 publications

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“…Strong adsorption peak seen at around 150/cm was ascribed to P-O asymmetric tension vibration peak on adsorbent after phosphate adsorption [22]. Similar to the study of Tu et al [22], it was seen that PO 4 -3 adsorbed on Na-MPN after adsorption for Na-MPN. On the other hand, O-H vibration peak observed at around 3,320/cm wavelength for Na-MPN was not seen after the adsorption.…”

Section: Ft-ir Analysis Of Adsorbentssupporting

confidence: 59%

Recycling of phosphorus from aqueous solutions by pine needles

Balbay¹

2019

DWT

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a b s t r a c tIn this study, it is aimed to use phosphate ions in aqueous solution for production of phosphated organic fertilizers by using pine needles. Pine needles (PN), pine needles modified by NaOH (Na-MPN), pine needles modified by CH 3 OH-NaOH solutions (MeOH-MPN) were used as adsorbents. Adsorbent amount (0.1-0.3 g/100 mL), contact time (15-1,440 min), pH (3-10), initial concentration (20-150 ppm) and temperature (25°C, 35°C, and 50°C) were the selected parameters. Microstructures, chemical and physical properties of the adsorbents were characterized, respectively, by Fourier transform infrared spectroscopy (PerkinElmer Spectrum 100, USA) and scanning electron microscope (ZEISS Supra 40VP, USA). According to experimental results and analyses, it was shown that lignin compound found in pine needles decreases the phosphate adsorption capacity of pine needles. The pseudo-second-order model for the Na-MPN adsorbent optimally fits the phosphate adsorption kinetics, and the data are coherent with Langmuir and Dubinin-Radushkevich (D-R) adsorption isotherm models. Furthermore, thermodynamic studies show that the adsorption process occurs spontaneously and naturally in an exothermic manner. As a result, it has been determined that it can be used as phosphated organic fertilizer in soils and waters where phosphate is insufficient by adsorbing phosphate ions to pine needles whose lignin were removed from waters having high phosphate concentration.

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Section: Ft-ir Analysis Of Adsorbentssupporting

confidence: 59%

Recycling of phosphorus from aqueous solutions by pine needles

Balbay¹

2019

DWT

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“…Phosphate adsorption experiments of this study were conducted by evenly mingling 0.5 g·L −1 of the La-chitosan magnetic spheres with 100 mL of a K 2 HPO 4 solution at 100 rpm and 25 • C. In addition, similar conditions have been also taken in kinetic experiments. The residual phosphate concentration of solution was determined accurately by a UV-VIS spectrophotometer (DR6000, HACH, Loveland, CO, USA) by the aid of the ammonium molybdate spectrophotometric method after filtration [17]. Then the q e (mg P·g −1 ) of phosphate were calculated as following Equation (1):…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Enhanced Phosphate Removal from Water by Honeycomb-Like Microporous Lanthanum-Chitosan Magnetic Spheres

Cheng

Shen

Zhang

et al. 2018

Water

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The removal of phosphate in water is crucial and effective for control of eutrophication, and adsorption is one of the most effective treatment processes. In this study, microporous lanthanum-chitosan magnetic spheres were successfully synthetized and used for the removal of phosphate in water. The characterization results show that the dispersion of lanthanum oxide is improved because of the porous properties of the magnetic spheres. Moreover, the contact area and active sites between lanthanum oxide and phosphate were increased due to the presence of many honeycomb channels inside the magnetic spheres. In addition, the maximum adsorption capacity of the Langmuir model was 27.78 mg P·g −1 ; and the adsorption kinetics were in good agreement with the pseudo-second-order kinetic equation and intra-particle diffusion model. From the results of thermodynamic analysis, the phosphate adsorption process of lanthanum-chitosan magnetic spheres was spontaneous and exothermic in nature. In conditional tests, the optimal ratio of lanthanum/chitosan was 1.0 mmol/g. The adsorption capacity of as-prepared materials increased with the augmentation of the dosage of the adsorbent and the decline of pH value. The co-existing anions, Cl − and NO 3 − had little effect on adsorption capacity to phosphate, while CO 3 2− exhibited an obviously negative influence on the adsorption capacity of this adsorbent. In general, owing to their unique hierarchical porous structures, high-adsorption capacity and low cost, lanthanum-chitosan magnetic spheres are potentially applicable in eutrophic water treatment.

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“…In recent years, the rare earth element lanthanum (La) and its derivatives have been proven to be important candidates for phosphorus removal due to their eco-friendliness, abundant sources, relatively low cost, and multipoint coordination ability. 10,11 For example, Sowmya et al 12 synthesized three polymeric materials loaded with La(III) exhibiting high phosphate adsorption capacities of 155.4 mg g À1 . Discarded lignocellulose biochar doped with La displayed a high phosphate adsorption capacity of 36.06 mg g À1 , good pH compatibility, good selectivity for phosphate, and excellent reusability due to ligand exchange, electrostatic attraction, and complexation.…”

Section: Introductionmentioning

confidence: 99%

Efficient removal of phosphate through adsorption by acidified diatomite loaded with La₂O₂CO₃

et al. 2023

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Phosphorus Removal From Aqueous Solution By Adsorption Onto La-modified Clinoptilolite

Cited by 8 publications

References 32 publications

Recycling of phosphorus from aqueous solutions by pine needles

Recycling of phosphorus from aqueous solutions by pine needles

Enhanced Phosphate Removal from Water by Honeycomb-Like Microporous Lanthanum-Chitosan Magnetic Spheres

Efficient removal of phosphate through adsorption by acidified diatomite loaded with La₂O₂CO₃

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Phosphorus Removal From Aqueous Solution By Adsorption Onto La-modified Clinoptilolite

Cited by 8 publications

References 32 publications

Recycling of phosphorus from aqueous solutions by pine needles

Recycling of phosphorus from aqueous solutions by pine needles

Enhanced Phosphate Removal from Water by Honeycomb-Like Microporous Lanthanum-Chitosan Magnetic Spheres

Efficient removal of phosphate through adsorption by acidified diatomite loaded with La2O2CO3

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Efficient removal of phosphate through adsorption by acidified diatomite loaded with La₂O₂CO₃