Competitive adsorption of phosphate and dissolved organic carbon on lanthanum modified zeolite

Li, Xiaodi; Kuang, Yue; Chen, Jiabin; Wu, Deyi

doi:10.1016/j.jcis.2020.04.050

Cited by 79 publications

(18 citation statements)

References 46 publications

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“…Moreover, the adequacy of this model in this study would show that chemisorption is the dominant mechanism during phosphates retention on these substrates. The suitability of this model to describe kinetics on complex materials would be explained essentially by the real heterogeneity of the complexation sites taken into account by the model [21,25,[39][40]. This is in agreement with the nature of these superficial sediments.…”

Section: Discussionsupporting

confidence: 57%

Contribution to the Study of Phosphorus Adsorption Kinetics on the Superficial Sediments of a Recently Development Artificial Estuary: Vridi Channel (Côte d'Ivoire)

Samuel

Konan

Trokourey

2021

CSIJ

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The aim of this study is to characterize phosphates adsorption kinetics on the superficial sediments of Vridi channel from its new hydromorphology. So, three scenarios have been carried out taking account the different waters seasons of this estuary by using pH and temperature as relevant parameters. In the first scenario, the experiments carried out at pH = 8 and T = 20°C to simulate phosphates adsorption on these sediments in its great cold season. In the second, the experiments carried out at pH = 8 and T = 25° C to simulate phosphates adsorption on these substrates in its hot season and small cold season. In the third, the experiments carried out at pH = 7 and T = 30°C to simulate phosphates adsorption on these sediments in its flood season. The experiences were carried out according to US EPA/530/SW-87/006-F protocol. KH2PO4 solutions were used as phosphates synthetic solutions. The experimental data were modeling by Lagergeen kinetics model (pseudo-order 1), Blanchard kinetics model (pseudo-order 2), Elovich kinetics model, Weber and Morris kinetics model and, external diffusion kinetics model. The results have showed phosphates adsorption on these sediments increase in the experiments carried out at pH = 8 and T = 20°C to those carried out at pH = 7 and T = 30°C. All experimental data have been well modeling by Blanchard kinetics model. So, these phosphates adsorption kinetics are pseudo-order 2 and the chemisorption is the dominant mechanism. The results obtained by the experimental data modeling by Weber and Morris kinetics model and external diffusion kinetics model showed that this process is not limiting by the molecular diffusion process. The experimental data have been again well modeling by Elovich kinetics model. That has confirmed the chemisorption character of this adsorption, and showed this chemisorption is activated.

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Section: Discussionsupporting

confidence: 57%

Contribution to the Study of Phosphorus Adsorption Kinetics on the Superficial Sediments of a Recently Development Artificial Estuary: Vridi Channel (Côte d'Ivoire)

Samuel

Konan

Trokourey

2021

CSIJ

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“…Phosphate and nutrient pollution of water is a leading cause of water quality degradation. 1 At present, eutrophication is one of the most significant surface water quality problems, distinguished by the development of algal blooms, hypoxia, and shortfall in biodiversity. 2 High amounts of algae in water have been known to disrupt desalination plant operations in the past, fisheries and groundwater wells.…”

Section: Introductionmentioning

confidence: 99%

Layered zinc hydroxide as an adsorbent for phosphate removal and recovery from wastewater

et al. 2021

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“…Previous research has shown similar trends, with high concentrations of DOC interfering with phosphate removal by metals [32]. DOC is not suspected of directly inhibiting the phosphate adsorption mechanism, since the surface ligand exchange mechanism has a higher affinity for phosphate ions than DOC; rather, DOC adsorbs to hydroxyl groups via hydrogen bonding after the groups' negative charges are neutralized by attached phosphate ions [33]. These results showed the competing adsorption of DOC (glucose) and phosphate molecules onto adsorbent surfaces.…”

Section: Simultaneous Doc and Phosphate Adsorptionmentioning

confidence: 64%

Effects of Ferrihydrite-Impregnated Powdered Activated Carbon on Phosphate Removal and Biofouling of Ultrafiltration Membrane

Lohwacharin

Maliwan

Osawa

et al. 2021

Water

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The presence of multiple contaminant species in surface waters makes surface water treatment difficult to accomplish through a single process. Herein, we evaluated the ability of an integrated adsorption/ultrafiltration (UF) membrane filtration system to simultaneously remove phosphates and dissolved organic matter (DOM). When bare powdered activated carbon (PAC) and PAC impregnated with amorphous ferrihydrite (FHPAC) adsorbents were compared, FHPAC showed a greater adsorption rate and capacity for phosphate. FHPAC had a phosphate adsorption capacity of 2.32 mg PO43−/g FHPAC, even when DOM was present as a competing adsorbate. In a lab-scale hybrid FHPAC-UF system (i.e. integrated adsorption by FHPAC with UF membrane filtration), irreversible membrane fouling was ca. three times lower than that in a PAC-UF system. When membrane fouling in the PAC-UF system was described with pore blockage models, we found that the main cause of fouling was bacterial deposition on the membrane surface. CLSM analysis determined that the chemical composition of foulants in the PAC-UF system included higher proportions of proteins, nucleic acids, and alpha-polysaccharides than that in the FHPAC-UF system. Overall, FHPAC’s ability to undergo ligand exchanges with DOM helped to reduce the nutrients and bacteria that cause biofouling to accumulate on the membrane surface.

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Competitive adsorption of phosphate and dissolved organic carbon on lanthanum modified zeolite

Cited by 79 publications

References 46 publications

Contribution to the Study of Phosphorus Adsorption Kinetics on the Superficial Sediments of a Recently Development Artificial Estuary: Vridi Channel (Côte d'Ivoire)

Contribution to the Study of Phosphorus Adsorption Kinetics on the Superficial Sediments of a Recently Development Artificial Estuary: Vridi Channel (Côte d'Ivoire)

Layered zinc hydroxide as an adsorbent for phosphate removal and recovery from wastewater

Effects of Ferrihydrite-Impregnated Powdered Activated Carbon on Phosphate Removal and Biofouling of Ultrafiltration Membrane

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