Phosphorus adsorption in Fe-loaded activated carbon: Two-site monolayer equilibrium model and phenomenological kinetic description

Braun, Julia; Borba, Carlos Eduardo; Godinho, Marcelo; Perondi, Daniele; Schöntag, Juliana Marques; Wenzel, Bruno München

doi:10.1016/j.cej.2018.12.073

Cited by 63 publications

(6 citation statements)

References 62 publications

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“…These values show the successful iron impregnation of carbon particles and nearly complete oxidation of iron ions to iron oxides. Braun, Borba [ 23 ] used a combination of FeSO 4 and FeCl 3 for the impregnation of commercial activated carbon particles and showed the percentages of 46%, 32%, and 20% for carbon, iron, and oxygen, respectively. These results corroborate our findings, except that we did not measure the oxygen element in the composition.…”

Section: Resultsmentioning

confidence: 99%

Iron-modified activated carbon derived from agro-waste for enhanced dye removal from aqueous solutions

Barjasteh-Askari

Davoudi

Dolatabadi

et al. 2021

Heliyon

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Background and aim Finding a cost-effective adsorbent can be an obstacle to large-scale applications of adsorption. This study used an efficient activated carbon adsorbent based on agro-waste for dye removal. Methods Pistachio shells as abundant local agro-wastes were used to prepare activated carbon. Then, it was modified with iron to improve its characteristics. Acid red 14 was used as a model dye in various conditions of adsorption (AR14 concentration 20–150 mg L −1 , pH 3–10, adsorbent dosage 0.1–0.3 g L −1 , and contact time 5–60 min). Results A mesoporous adsorbent was prepared from pistachio shells with 811.57 m 2 g −1 surface area and 0.654 cm 3 g −1 pore volume. Iron modification enhanced the characteristics of activated carbon (surface area by 33.3% and pore volume by 64.1%). Adsorption experiments showed the high effectiveness of iron-modified activated carbon for AR14 removal (>99%, >516 mg g −1 ). The adsorption followed the pseudo-second kinetic model (k = 0.0005 g mg −1 min −1 ) and the Freundlich isotherm model (K f = 152.87, n = 4.61). Besides, the reaction occurred spontaneously (ΔG 0 = −36.65 to −41.12 kJ mol −1 ) and was exothermic (ΔH 0 = −41.86 kJ mol −1 and ΔS 0 = −3.34 J mol −1 K −1 ). Conclusion Iron-modified activated carbon derived from pistachio shells could be cost-effective for the treatment of industrial wastewater containing dyes.

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Section: Resultsmentioning

confidence: 99%

Iron-modified activated carbon derived from agro-waste for enhanced dye removal from aqueous solutions

Barjasteh-Askari

Davoudi

Dolatabadi

et al. 2021

Heliyon

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“…In addition, none of those studies focused on any sustainable technique to reduce the resultant high pH of water after P removal. There is ample literature available on the removal of P by the golden standard of activated carbons through adsorption, but those studies either focused on low-P-concentrated aqueous solutions or provided considerably low performance with high-P-concentrated waters. , Therefore, for the removal of high-P-concentrated wastewater, development of new sustainable P removal agents is required. Only few studies on the removal of P from wastewater with seashells were found but, to the best of our knowledge, none with the seashell-derived nanocalcium hydroxide (N-CH).…”

Section: Introductionmentioning

confidence: 99%

Removal of Phosphorus from an Aqueous Solution by Nanocalcium Hydroxide Derived from Waste Bivalve Seashells: Mechanism and Kinetics

Khan

Thannaree

et al. 2020

ACS Omega

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Excessive supply of phosphorus, a vital macronutrient for all organisms, can cause unwanted environmental consequences such as eutrophication. An increase in agricultural and industrial activities has created a considerable imbalance in the phosphorus cycle with continuing adverse effects on sustainability and ecosystem health, thereby stipulating/postulating the significance of phosphorus removal. A unique and sustainable concept for the removal of phosphorus through the utilization of waste bivalve seashells was proposed in the present study. Flat-surfaced and hexagonally shaped nanocalcium hydroxide particles (∼96% purity) with size ranging from 100 to 400 nm have been synthesized, and phosphorus from its aqueous solution is treated via precipitation. An optimization study has been conducted using the Box−Behnken design of response surface methodology, which highlights that with a calcium/phosphorus mass ratio, pH, and temperature of 2.16, 10.20, and 25.48 °C, a phosphorus removal efficiency of 99.33% can be achieved in a residence time of 10 min. Also, under the same conditions, diluted human urine was analyzed and phosphorus removal efficiency of ∼95% was observed. Through experimental results, semiquantitative phase analysis, and transmission electron microscopy, it has been found that the reaction was diffusion-controlled, which was further confirmed through shrinking core diffusion modeling. The present study manifests the promising potential of waste seashell-derived nanocalcium hydroxide for phosphorus treatment and its precipitation in the form of value-added hydroxyapatite.

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“…The adsorption method receives extensive attention for the advantages, such as low cost, simple operation, good repeatability, and no secondary pollution. There are a variety of adsorbents for phosphate removal from water, such as activated carbon, 11 metal oxides, 12 chitosan, 13 graphene, 14 and zeolites. 15 However, the materials show limited adsorption capacities because of poor selectivity and insufficient surface area.…”

Section: ■ Introductionmentioning

confidence: 99%

Fe-Substituted Isoreticular Metal–Organic Framework for Efficient and Rapid Removal of Phosphate

Wang

Xia

2019

ACS Appl. Nano Mater.

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Excessive phosphate can cause water eutrophication. Adsorption can remove excessive phosphate in water to alleviate eutrophication effectively. Herein, an isoreticular metal–organic framework (Fe-IRMOF-3-10) with bimetallic center and double ligand was successfully synthesized from a single metal center and single ligand isoreticular metal–organic framework (IRMOF-3) to remove phosphate in water effectively. In the four IRMOFs, Fe-IRMOF-3-10 shows higher adsorption capacity (177.0 mg g–1 at 25 °C) and faster adsorption kinetics (5 min) for phosphate. The adsorption capacity and removal efficiency remain stable in the range of pH 4–11. The adsorption capacity of Fe-IRMOF-3-10 for phosphate is not only not affected by a large number of coexisting anions (Cl–, F–, NO3 –, and SO4 2–) but also not affected by the ionic strength. The adsorption mechanism study illustrated that the removal of phosphate by Fe-IRMOF-3-10 not only included the affinity of amine group and Fe3+ for phosphate but also involved the ion exchange between hydroxyl group and phosphate. The adsorption efficiency of Fe-IRMOF-3-10 for phosphate from actual water samples indicated the potential of Fe-IRMOF-3-10 for the removal of phosphate from natural water samples.

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Phosphorus adsorption in Fe-loaded activated carbon: Two-site monolayer equilibrium model and phenomenological kinetic description

Cited by 63 publications

References 62 publications

Iron-modified activated carbon derived from agro-waste for enhanced dye removal from aqueous solutions

Iron-modified activated carbon derived from agro-waste for enhanced dye removal from aqueous solutions

Removal of Phosphorus from an Aqueous Solution by Nanocalcium Hydroxide Derived from Waste Bivalve Seashells: Mechanism and Kinetics

Fe-Substituted Isoreticular Metal–Organic Framework for Efficient and Rapid Removal of Phosphate

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