Adsorption of uranium(VI) and thorium(IV) by insolubilized humic acid from Ajloun soil – Jordan

Khalili, Fawwaz I.; Al-Banna, Ghadeer

doi:10.1016/j.jenvrad.2015.03.035

Cited by 88 publications

(28 citation statements)

References 24 publications

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“…According to their increased solubility in water, they are usually classified as humin, humic acid (HA) and fulvic acid. To overcome this limitation, some treatments (such as immobilization (6)(7)(8)(9)(10) and A c c e p t e d M a n u s c r i p t 3 insolubilization (2,5,11,12)) have been suggested to turn HA into a material which is less soluble in water, and thus to use it as an adsorbent, safely. The presence of some functional groups (i.e.…”

Section: Introductionmentioning

confidence: 99%

Humic-makeup approach for simultaneous functionalization of polyacrylonitrile nanofibers during electrospinning process, and dye adsorption study

et al. 2016

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A useful methodology is represented to functionalize polyacrylonitrile nanofibers by using humic acid as a makeup agent in electrospinning process. Both morphology and surface chemistry of polyacrylonitrile nanofiber mats were understood to be influenced by incorporation of humic acid into the structure. Physicochemical changes were evidenced by FTIR, SEM, and surface charge measurements. Unlike some anionic dyes (i.e. Methyl orange, Methyl red, and Congo red), there was an enhancement in Crystal violet (a cationic dye) adsorption after incorporation of humic acid. The Langmuir model fitted well to Crystal violet data, and monolayer adsorption capacity was calculated as 81.6 mg/g (r 2 =0.998).

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Section: Introductionmentioning

confidence: 99%

Humic-makeup approach for simultaneous functionalization of polyacrylonitrile nanofibers during electrospinning process, and dye adsorption study

et al. 2016

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“…The adsorption isotherm data were fitted with the Langmuir model and Freundlich model. The Langmuir adsorption isotherm was expressed as the Equation , and the Freundlich adsorption isotherm was explained by the Equation (Khalili, Al‐Banna, & Yu, ):

q_{normale} = \frac{(C_{0} - C_{e}) V}{m}

q_{normale} = \frac{q_{normalm} k_{normalL} C_{normale}}{1 + k_{normalL} C_{normale}}

q_{normale} = k_{normalF} C_{e}^{1 / n}

where q e (mg g −1 ) is the amount of Cu 2+ adsorbed at equilibrium, C 0 and C e (mg L −1 ) are the initial and the equilibrium Cu 2+ concentrations, V (L) is the volume of the solution, m (g) was the mass of the adsorbent, q m (mg g −1 ) and k L (L mg −1 ) are Langmuir constants related to the maximum adsorption capacity and energy or intensity of adsorption, respectively, k F (mg g −1 (mg L −1 ) −1/ n ) and 1/ n are the Freundlich constants representing the adsorption capacity and the adsorption intensity or heterogeneity of adsorbent, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The adsorption isotherm data were fitted with the Langmuir model and Freundlich model. The Langmuir adsorption isotherm was expressed as the Equation (2), and the Freundlich adsorption isotherm was explained by the Equation (3) (Khalili, Al-Banna, & Yu, 2015):…”

Section: Sorption Of Cu 2+ On Hamentioning

confidence: 99%

Effect of copper ion and soil humic acid on biodegradation of decabromodiphenyl ether (BDE‐209) by Pseudomonas aeruginosa

et al. 2017

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Pseudomonas aeruginosa is a good environmental microorganism capable of degrading decabromodiphenyl ether (BDE‐209). This paper studied the effect of Cu2+ and humic acid (HA) extracted from e‐waste contaminated soils on biodegradation of BDE‐209 by P. aeruginosa. The adsorption isotherms of Cu2+ on HA, the crude enzyme activity, cell surface morphology, and biodegradation pathway were also investigated. The results showed that BDE‐209 biodegradation by P. aeruginosa was inhibited at Cu2+ concentrations above 5 mg L−1, but exhibited the best effect at the condition of 40 mg L−1 Cu2+ + 3 g L−1 HA. At the condition of 40 mg L−1 Cu2+ + 3 g L−1 HA, 97.35 ± 2.33% of the initial BDE‐209 was degraded after 5 days, debromination efficiency was 72.14 ± 1.89%, crude enzyme activity reached the maximum of 0.519 ± 0.022U g−1 protein, cell surface of P. aeruginosa was smooth with normal short‐rod shapes, and biodegradation pathway mainly include debromination, hydroxylation, and cleavage of the diphenyl ether bond. It was suggested that soil HA could eliminate the toxic effect of high Cu2+ concentrations and biodegradation of BDE‐209 was improved by synergistic effect of HA and Cu2+.

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“…13 Many researchers have used various electron shuttles, such as: melanin, phenazine derivatives, avins, and humic substances (HS) to enhance U(VI) bioreduction. 14,15 Quinones are a redox active group of humic substances widely present in soil, water and even activated sludge, and can act as electron shuttles facilitating the reduction of extracellular electron acceptors and the degradation of pollutants. 16 AQS a synthetic quinone that has been used extensively as a model for the redox properties of quinone groups in HS, enhance the reduction of iron oxides by DIRB.…”

Section: Introductionmentioning

confidence: 99%

Effects of riboflavin and AQS as electron shuttles on U(vi) reduction and precipitation byShewanella putrefaciens

et al. 2018

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Adsorption of uranium(VI) and thorium(IV) by insolubilized humic acid from Ajloun soil – Jordan

Cited by 88 publications

References 24 publications

Humic-makeup approach for simultaneous functionalization of polyacrylonitrile nanofibers during electrospinning process, and dye adsorption study

Humic-makeup approach for simultaneous functionalization of polyacrylonitrile nanofibers during electrospinning process, and dye adsorption study

Effect of copper ion and soil humic acid on biodegradation of decabromodiphenyl ether (BDE‐209) by Pseudomonas aeruginosa

Effects of riboflavin and AQS as electron shuttles on U(vi) reduction and precipitation byShewanella putrefaciens

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