Eutrophication decrease: Phosphate adsorption processes in presence of nitrates

Boeykens, Susana; Piol, María Natalia; Saralegui, Andrea Beatriz; Vázquez, Cristina

doi:10.1016/j.jenvman.2017.05.026

Cited by 142 publications

(59 citation statements)

References 21 publications

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“…Eutrophication can cause the degradation of ecological environment of water bodies, and blooms of red tide and blue-green algae, which cause the death of aquatic animals and many other environmental issues. 1,2 Phosphorus is believed to be one of the main reasons for the eutrophication of water bodies. It is the limiting element of eutrophication and the nutrient presented in the lowest amount associated with phytoplankton requirements.…”

Section: Introductionmentioning

confidence: 99%

Phosphate adsorption onto thermally dehydrated aluminate cement granules

et al. 2018

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Phosphorus is the main element for eutrophication of water bodies. Aluminate cement is a cheap building material rich in aluminium and calcium which have significant effects on phosphate adsorption. This study aimed at the investigation of removal behavior of phosphate by thermally dehydrated aluminate cement granules, treated at different temperatures, and the adsorption mechanisms. It was found that 600 C was the optimal temperature, producing excellent granules with a particle size of 0.6-1.5 mm (T600), giving a great adsorption capacity of phosphate of 49.1 mg P per g and presenting fast and high initial adsorption, reaching a capacity of 23.7 mg P per g within 30 min at 20 C. The phosphate adsorption process was dominated by chemical adsorption, mainly through inner-sphere complexion and phosphate precipitation on the surface of the adsorbent. Compared with other phosphate adsorbents, T600 may be an economical and efficient adsorbent.

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Section: Introductionmentioning

confidence: 99%

Phosphate adsorption onto thermally dehydrated aluminate cement granules

et al. 2018

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“…It is applied to estimate the mean free energy of adsorption ( E ). If the value of E is between 1 and 16 kJ/mol, then physical adsorption prevails, and if the value is more than 16 kJ/mol, then chemisorption prevails . The D–R equation can be expressed as follows:

q_{e} = B_{T} \exp (- B ɛ^{2})

…”

Section: Methodsmentioning

confidence: 99%

Phosphate removal from aqueous solutions by nano‐alumina for the effective remediation of eutrophication

Yadav

Kumar

Kapur

et al. 2018

Env Prog and Sustain Energy

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Excessive phosphate effluent discharged in the surface water source rush to eutrophication. Consecutively this disturbs the water quality and aquatic ecosystem, due to the depletion of dissolved oxygen. Reduced oxygen level in water bodies affects aquatic life and decreases biodiversity. The present investigation emphasized the phosphate adsorption over nano‐alumina. Surface characteristics of the adsorbents, BET, FTIR, XRD, TEM, and SEM were analyzed to reveal the phosphate adsorption mechanisms. The adsorption isotherms, kinetics, pH effect were observed in batch experiments. The pHpzc value of nano‐alumina adsorbent was found as 8.1. The maximum phosphate adsorption was found to be 98.75% at contact time of 90 min and pH 6. Different models, e.g., Langmuir, Freundlich, Temkin, and Dubinin‐Radushkevich were used for isotherm study. The kinetic data were tested by pseudo‐first order and second order models. An attempt was made to regenerate the spent adsorbent for reuse in the adsorption process. Low cost and high capability of nano‐alumina make it feasible to utilize as cost‐effective phosphate remediation from wastewater. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S77–S85, 2019

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“…Adsorption tests were performed at various initial pH values ranging from 2 to 12 to investigate the interaction mechanisms between orthophosphates and LDHs. Depending on the value of pH solution, orthophosphates can exist in several forms H 3 PO 4 , -H PO , 2 4 -HPO , 4 2 and -PO 4 3 [29]. Results of figure 7 show that the affinity of adsorbent to remove orthophosphates is low at pH3, this can be explained by the instability of LDHs structure [30].…”

Section: Adsorption Mechanismsmentioning

confidence: 97%

“…Phosphorus (P) is an essential compound which is required for all living organisms [1]. This element becomes from natural origin such as the dissolution of soils and decomposition of organic matter [2]. However, the anthropogenic source of P is related to agricultural activities, industrial effluents, detergents, animal excrement and fertilizers [3].…”

Section: Introductionmentioning

confidence: 99%

Zn-Al layered double hydroxide: synthesis, characterization and application for orthophosphates ions adsorption in aqueous medium

Rouahna

Ouakouak

Srasra

2020

Mater. Res. Express

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This paper aims at studying the preparation of Zn-Al-LDH anionic clay and its adsorption proprieties in removing orthophosphate ions from aqueous medium. The LDH phase was synthesized by coprecipitation method and then calcined at 500°C. Structural and textural properties of the prepared LDHs were determined by using x-ray diffraction, FTIR, BET, SEM and pH PZC analysis. Batch adsorption experiments were carried out under different parameters such as stirring time, pH and initial orthophosphate concentration. Results show that the prepared LDHs are efficient in removing orthophosphate and the maximum uptake was observed after 2 h. Experimental kinetic data are well described by the pseudo-second order model. It was also found that the adsorption process is significantly affected by the pH value. The sorption mechanisms include ion exchange, reconstitution of LDH phase and/or electrostatic attraction. Also, the isotherm study reveals that the Freundlich equation best fit the equilibrium data.

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Eutrophication decrease: Phosphate adsorption processes in presence of nitrates

Cited by 142 publications

References 21 publications

Phosphate adsorption onto thermally dehydrated aluminate cement granules

Phosphate adsorption onto thermally dehydrated aluminate cement granules

Phosphate removal from aqueous solutions by nano‐alumina for the effective remediation of eutrophication

Zn-Al layered double hydroxide: synthesis, characterization and application for orthophosphates ions adsorption in aqueous medium

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