Removal of phosphate ions from aqueous solution using Tunisian clays minerals and synthetic zeolite

Hamdi, Noureddine; Srasra, Ezzeddine

doi:10.1016/s1001-0742(11)60791-2

Cited by 81 publications

(36 citation statements)

References 21 publications

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“…The removal efficiency of P was *98 % after 6 h of adsorption. Generally, sorption kinetics of P by iron oxides can be described with first-/second-order kinetic models (Hamdi and Srasra 2012). However, P removal by pyrite calcinate did not fit well with either firstorder or second-order kinetic models.…”

Section: Structure and Property Of Pyrite Calcinatedmentioning

confidence: 98%

Phosphorus removal from aqueous solutions containing low concentration of phosphate using pyrite calcinate sorbent

Chen

Wang

Xie

et al. 2014

Int. J. Environ. Sci. Technol.

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Natural pyrite was modified by calcination under nitrogen (N 2 ) atmosphere to produce a novel sorbent for removing phosphorus (P) with low concentration from aqueous solutions. The crystallinity, porous texture, magnetic susceptibility and performance in P removal of pyrite calcinates depended on calcination temperatures. The sorbent obtained at calcination temperature of 500-600°C possessed the most efficient P removal. Solution pH in the range of 3.0-9.0 and anions of chloridion (Cl -), nitrate (NO 3 )-and sulfate (SO 4 2-) had ignorable effect on P removal. The batch adsorption experiment shows that the maximum sorption capacities for P of this novel sorbent (q m ) were up to 1.61-5.36 mg P/g at adsorption temperatures of 15-35°C. Dynamic sorption and regeneration experiments were conducted in an adsorption column filled with pyrite calcined at 600°C. The study found that oxygen was an important control factor responsible for P adsorption because the oxidization of Fe 2? to Fe 3? on the surface of the sorbent followed by P being bound to a ferric hydroxide surface film was the crucial processes. The mechanism was confirmed with surface characterization techniques including field emission scanning electron microscope and X-ray photoelectron spectroscopy. This research potentially provides a cheap, abundant sorbent for P removal from the secondary effluent of municipal wastewater treatment plant.

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Section: Structure and Property Of Pyrite Calcinatedmentioning

confidence: 98%

Phosphorus removal from aqueous solutions containing low concentration of phosphate using pyrite calcinate sorbent

Chen

Wang

Xie

et al. 2014

Int. J. Environ. Sci. Technol.

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“…The removal efficiency decrease with increasing the initial iron concentration at any given time as shown in the response surface plotting and this trend fixed in both raw bentonite and thermally modified one. Higher adsorption capacity at lower iron concentration is attributed to availability of active sorption sites at lower concentrations, while increasing the initial iron concentrations provide more iron ions, however the fixed amount from the used adsorbent has a fixed number of sorption sites [46,50].…”

Section: (Ii) Interaction Between Contact Time and Initial Ironmentioning

confidence: 99%

Application of Quadratic Polynomial Model for the Uptake of Iron from Aqueous Solutions by Natural and Modified Egyptian Bentonite

Abukhadra¹

2015

AJAC

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The natural Egyptian bentonite, collected from south El Hammam area, was modified at three different temperatures 100°C, 200°C and 300°C for 1 h. The raw and modified bentonite samples were characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM) and BET surface area. The bentonite modified at 100°C exhibited more flaky grains with smooth surface and high surface area as compared to the two other modified types. Response surface methodology in conjunction with central composite rotatable design was used in optimizing and modeling the effect of different parameters such as contact time, initial concentration and dose on the removal of iron ions. Second order quadratic polynomial model was selected to represent the removal process. The mathematical equations of quadratic polynomial model were derived from Design Expert Software (Version 6.0.5). The predicted values from the mathematical equations were highly correlated with the experimental results (R 2 above 0.9) for the required responses in untreated and modified bentonite at 100°C for 1 h. 3D and linear graphs were used to understand the effect of the studied variable parameters and the interaction between them. Under the predicted conditions suggested by the quadratic programming, the modified bentonite at 100°C is more promising and the removal efficiency could be enhanced to 100%. The quadratic polynomial model could be efficiently applied for the modeling of iron removal from aqueous solutions by bentonite.

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“…Oleh karena itu, apabila adsorben ingin dimanfaatkan lebih lanjut menjadi pupuk lebih baik menggunakan adsorben dolomite. Tetapi apabila ingin menyisihkan orthofosfat dalam konsentrasi yang besar lebih baik menggunakan tanah liat (Hamdi dan Srasra, 2012).…”

Section: Gambar 4 Kemampuan Melepaskan Orthofosfat Tiap Adsorbenunclassified

Kesetimbangan Dan Kinetika Penyisihan Orthofosfat Dari Dalam Air Dengan Metode Adsorpsi-Desorpsi

Larasati

Notodarmodjo

2014

j.tl

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Ion fosfat sering dikaitkan dengan terjadinya algae blooming dan masalah estetika pada badan air permukaan. Fosfat ini perlu diolah dan dimanfaatkan lebih lanjut. Salah satu metode yang dapat digunakan untuk mengolah orthofosfat adalah metode adsorpsi. Tujuan dari penelitian ini adalah mengadsorpsi ion fosfat ke dalam adsorben yang murah. Tanah (tanah Dago dan tanah Arcamanik) dan bebatuan lokal seperti dolomite hadir sebagai media adsorben yang murah dan mudah diperoleh. Dilakukan percobaan pengaruh pH larutan terhadap proses adsorpsi. Hasil penelitian menunjukkan bahwa efisiensi penyisihan orthofosfat tertinggi saat pH asam (pH 2).

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Removal of phosphate ions from aqueous solution using Tunisian clays minerals and synthetic zeolite

Cited by 81 publications

References 21 publications

Phosphorus removal from aqueous solutions containing low concentration of phosphate using pyrite calcinate sorbent

Phosphorus removal from aqueous solutions containing low concentration of phosphate using pyrite calcinate sorbent

Application of Quadratic Polynomial Model for the Uptake of Iron from Aqueous Solutions by Natural and Modified Egyptian Bentonite

Kesetimbangan Dan Kinetika Penyisihan Orthofosfat Dari Dalam Air Dengan Metode Adsorpsi-Desorpsi

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