Sorption of uranium(VI) from aqueous solutions by akaganeite

Yuşan, Sabriye; Akyıl, S.

doi:10.1016/j.jhazmat.2008.03.009

Cited by 136 publications

(61 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This model states that reactions take place in several sorption sites and as the amount of solute adsorbed rises, the binding surface energy decreases exponentially which means multilayer sorption [39]. The isotherm is expressed by the following equation:…”

Section: Freundlich Isothermmentioning

confidence: 99%

Effective Removal of Nitrates Ions from Aqueous Solution Using New Clay as Potential Low-Cost Adsorbent

Ouardi¹,

Qourzal²,

Alahiane³

et al. 2015

JEAS

View full text Add to dashboard Cite

In the present study, we investigated the performance of clay mineral originated from a dam situated in Morocco (Agadir city), as natural, low-cost, alternative and eco-friendly adsorbent for removal of nitrates ions from aqueous solution within a batch process. The clay was characterized by X-ray diffraction, Scanning Electron Microscopy (SEM), Dispersive Energy of Spectroscopy (EDS), Fourier Transform Infrared (FTIR) and surface area analysis (BET). The effects of various experimental parameters are examined such as contact time, initial concentration of pollutant, adsorbent mass and solution pH. The removal of nitrate was 71.89% at natural pH (pH = 5.1) using 1 g/l of adsorbent in 500 ml of nitrate solution having initial concentration of 300 mg/l (effect of contact time). Adsorption kinetic study revealed that the adsorption process followed first order kinetic. Theoretical correlation of the experimental equilibrium adsorption data for the NitrateNew Clay system was properly explained by the Langmuir isotherm model. The maximum adsorption capacity was Qm, exp = 244.06 mg/g at 20˚C and at natural pH (with Q m, cal = 250 mg/g). An increase in adsorbent dosage increased the percent removal of nitrate, R = 1 g/l was considered as optimum dose and was used for further study. The pH heavily affected the adsorption capacity, and the percentage removal was found to decrease with increase in pH. The obtained results indicated that this New Clay (NC) was very good adsorbent for 3 NO − , interesting alternative material with respect to more costly adsorbent used, and could be used as a highly efficient adsorbent for the separation of nitrate from drinking or waste water.

show abstract

Section: Freundlich Isothermmentioning

confidence: 99%

Effective Removal of Nitrates Ions from Aqueous Solution Using New Clay as Potential Low-Cost Adsorbent

Ouardi¹,

Qourzal²,

Alahiane³

et al. 2015

JEAS

View full text Add to dashboard Cite

show abstract

“…The adsorption isotherm offers how adsorbate molecules distribute between the liquid and solid phase at an equilibrium state [35].…”

Section: Adsorption Isothermmentioning

confidence: 99%

Removal of U(VI) from aqueous media by hydrothermal cross-linking chitosan with phosphate group

Dong

Qiu

Dai

et al. 2016

J Radioanal Nucl Chem

View full text Add to dashboard Cite

For the selective adsorption of U(VI) from aqueous solutions, the hydrothermal cross-linking chitosan (HCC) and its phosphorylation production (HCC-TPP) were synthesized by hydrothermal reaction. The monolayer maximum capacity of HCC-TPP was improved from 200 mg g -1 of HCC to 409.2 mg g -1 at 298 K. Calculated thermodynamic parameters showed endothermic property of the adsorption process, while kinetic parameters indicated that the interaction followed pseudo-second kinetic model. Selective separation of U(VI) from effluent by HCC-TPP was achieved.

show abstract

“…These isotherm equations are the most common isotherms used to determine adsorption equilibrium in water and wastewater treatment applications (Yusan and Akyil 2008). Langmuir equation (6) applied successfully to several biosorption processes is given below: ……………………………….…”

Section: Biosorption Isothermsmentioning

confidence: 99%

Untitled

Celik¹,

Camas²,

Camas³

et al. 2016

Turk. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

The biosorption of heavy metals, radionuclides, uranium and thorium for the recovery or removal from aqueous systems using various micro-organisms and biological substances has been investigated by several groups of workers. In this paper, the uptake of uranium (VI) from aqueous systems by a marine sponge, Sarcotragus foetidus (Schmidt, 1862) has been investigated. S. foetidus samples were collected from Babakale/Ayvacık/Canakkale in Turkey. Uranium (VI) uptake experiments were carried out by the batch technique. The affecting parameters were analyzed using Central Composite Design (CCD) as the experimental method. Four independent variables such -pH, temperature, contact time, and initial uranium concentration were selected for this study. The influences of initial pH, contact time, and initial uranium concentration on the biosorption process were considered statistically significant as main effects. On the other hand, interaction effects of pH and contact time, as well as pH and initial uranium concentration, were considered as significant parameters on the biosorption process. The optimum condition of biosorption process was found to be at init"ial pH: 4, temperature: 35°C, initial uranium concentration: 20 mg/L, and contact time: 31 minutes. At these conditions, the biosorption yield of uranium (VI) ions was obtained to be 93.29±2%.Keywords: Marine sponge, Statistical design, Experimental Design, Analysis of variance (ANOVA), biological sorption. Sarcotragus foetidus (Schmidt, 1862) Denizel Süngeri ile Uranyum (VI) Biyosorpsiyonunun Merkezi Kompozit Dizayn ile İstatistiksel Olarak Araştırılması ÖzetMikroorganizmalar ve biyolojik materyaller kullanarak radyonüklitlerin, ağır metallerin, toryum ve uranyum gibi radyoaktif metallerin sulu çözeltilerden geri alınması veya uzaklaştırılması üzerine birçok çalışma vardır. Bu çalışmada, Sarcotragus foetidus (Schmidt, 1862) olarak adlandırılan deniz süngerinin sulu çözeltilerden uranyum alımı istatistiksel olarak araştırıldı. S. foetidus (Schmidt, 1862) deniz süngeri örnekleri Babakale (Ayvacık / Çanakkale) açıklarından toplandı. Uranyum (VI) geri alım denemeleri kesikli yöntem ile gerçekleştirildi. Biyosorpsiyonu etkileyen parametreler Merkezi Kompozit Deneysel Tasarımı (CCD) kullanılarak analiz edildi. Bu çalışma için; pH, sıcaklık, temas süresi ve uranyum başlangıç konsantrasyonu gibi dört bağımsız değişken seçildi. Ana parametrelerden pH, temas süresi ve uranyum başlangıç konsantrasyonu biyosorpsiyon prosesinde istatistiksel olarak anlamlı olarak kabul edildi. Diğer bir yandan; biyosorpsiyon işlemi üzerinde, pH-temas süresi, pH -uranyum başlangıç konsantrasyonu gibi ikili etkileşimler önemli parametreler olarak belirlendi. Biyosorbsiyon prosesinin optimum koşulları; pH:4, sıcaklık: 38 , uranyum başlangıç konsantrasyonu: 20 mg/L ve temas süresi: 31 dakika olarak hesaplandı. Bu koşullar altında biyosorpsiyon verimi % 93.29±2 olarak elde edildi.

show abstract

Sorption of uranium(VI) from aqueous solutions by akaganeite

Cited by 136 publications

References 26 publications

Effective Removal of Nitrates Ions from Aqueous Solution Using New Clay as Potential Low-Cost Adsorbent

Effective Removal of Nitrates Ions from Aqueous Solution Using New Clay as Potential Low-Cost Adsorbent

Removal of U(VI) from aqueous media by hydrothermal cross-linking chitosan with phosphate group

Untitled

Contact Info

Product

Resources

About