Dye adsorption by resins: Effect of ionic strength on hydrophobic and electrostatic interactions

Hu, Yaoqiang; Guo, Tailin; Ye, Xiushen; Li, Quan; Guo, Min; Liu, Haining; Wu, Zhijian

doi:10.1016/j.cej.2013.04.116

Cited by 306 publications

(138 citation statements)

References 36 publications

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“…Since slight effect of ionic strength was observed, hydrophobic-hydrophobic interaction and hydrogen bonding might have been effective in the adsorption of tetracycline by ptPO. These interactions were also observed by other researchers (Maurya, Mittal, Cornel, & Rother, 2006;Hu et al, 2013;Dahri, Kooh, & Lim, 2015). Finally, the effect of solvent volume on adsorption of tetracycline by ptPO was examined (Figure 3.g).…”

Section: Optimization Of Adsorption Process By Ptpomentioning

confidence: 51%

Untitled

Donut¹,

Çavaş²

2017

Turk. J. Fish. Aquat. Sci.

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Importance of the artificial intelligence in the chemical processes has been increased in the recent studies. Although biosorption is widely studied topic in chemistry, modelling of biosorption data is based on very old equations. However, use of artificial intelligence in the biosorption based studies can give important clues to researchers. For this purpose, the biosorption of tetracycline by using Posidonia oceanica from the Mediterranean Sea was studied in this study. According to classical evaluation, the data were well in line with pseudo-second order kinetic and Langmuir's isotherm. In the artificial neural network modelling, the best back propagation algorithm, optimum number of hidden neuron and optimum training:validation:testing ratio were found as Bayesian Regulation, 16 and 70:10:20, respectively. In conclusion, P. oceanica based marine waste can be used in the development of high performance biosorbents for environmental pollutants. However, it should not be forgotten that P.oceanica is a threatened species; therefore, only dead leaves accumulated in recreational area should be collected and evaluated based on the permissions of governmental authorities. The results also exhibited that artificial neural network can also be used in the modelling of the biosorption data in which it helps scientists to estimate biosorption ratio correctly under various conditions.

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Section: Optimization Of Adsorption Process By Ptpomentioning

confidence: 51%

Untitled

Donut¹,

Çavaş²

2017

Turk. J. Fish. Aquat. Sci.

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“…The extraction efficiency of ST increased with the NaCl concentration above 25% because of the NaCl salting effect [24]. In addition to this, the hydrophobic attraction was higher when NaCl concentration was high.…”

Section: Ionic Strengthmentioning

confidence: 77%

Magnetic Solid Phase Extraction Using Ionic Liquid Coated Magnetic Core Fe3O4@SiO2 Nanoparticles Followed by UV Spectrophotometry for Separation/Analysis of Safranine T in Food

Bakheet¹

2017

AJHC

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Hydrophobic ionic liquids (IL) 1-octyl-3-methylimidazole hexafluorophosphate ([OMIM] PF 6 ) coatedFe 3 O 4 @SiO 2 nanoparticles was employed in magnetic solid phase extraction (MSPE) method coupled with ultraviolet visible spectrophotometry for the analysis of safranineT (ST). The results showed that safranineT was adsorbed fast by Fe 3 O 4 @SiO 2 @[OMIM] PF 6 and eluted by ethanol. Different parameters, such as; pH, temperature, ionic strength, eluent type, volume and temperature were studied. This method introduced wide linear range of 15-350 ng mL -1 , the correlation coefficient was 0.9991, the equations of calibration graph was A (absorbance) = 0.04+0.13c (µg mL -1 ), the detection limit was 0.37 ng mL -1 (RSD = 5.1%). The current method could be applied for the analysis of ST in food samples with satisfactory results.

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“…However, at higher NaCl concentrations, the competition between Na + and organic cations for the available sites became more significant leading to a low organic cations removal. That might be attributed to the greater selectivity of anionic sulfate groups of the resin for Na + cations than that for organic cations 23 since Na + ions are smaller in size in comparison to organic cations and hence the mobility of Na + is higher than organic cations 24 . Similar results represented by Wang 25 .…”

Section: Effect Of Ionic Strengthmentioning

confidence: 99%

Adsorption Behavior of some N-alkyl Pyridinium Salts from Aqueous Solution on Amberlite-IR 120 H+ resin

2018

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The effect of Amberlite-IR 120 H + resin to remove some organic compounds (N-alkyl pyridinium salts) from aqueous solutions at certain conditions was investigated. The effect of resin dosage, contact time, adsorbate concentration, ionic strength and solution temperature on the adsorption efficiency was examined. The experimental data collected generally proved that the adsorption efficiency decreased as the alkyl chain increased. The thermodynamic equilibrium parameters of the adsorption processes were evaluated and showed that the adsorption process is spontaneous, disordered and exothermic. Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D.R) isotherm models were applied based on the batch method. Freundlich, Temkin and D. R gave bilinear segments model based on the adsorbate initial concentrations except that for compound III where it gave straight of one segment for Temkin adsorption isotherm. Overall, Amberlite-IR 120 H + resin is effective in removing some N-alkyl pyridinium salts from an aqueous solution.

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Dye adsorption by resins: Effect of ionic strength on hydrophobic and electrostatic interactions

Cited by 306 publications

References 36 publications

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Magnetic Solid Phase Extraction Using Ionic Liquid Coated Magnetic Core Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> Nanoparticles Followed by UV Spectrophotometry for Separation/Analysis of Safranine T in Food

Adsorption Behavior of some N-alkyl Pyridinium Salts from Aqueous Solution on Amberlite-IR 120 H+ resin

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Dye adsorption by resins: Effect of ionic strength on hydrophobic and electrostatic interactions

Cited by 306 publications

References 36 publications

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Magnetic Solid Phase Extraction Using Ionic Liquid Coated Magnetic Core Fe&lt;sub&gt;3&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;@SiO&lt;sub&gt;2&lt;/sub&gt; Nanoparticles Followed by UV Spectrophotometry for Separation/Analysis of Safranine T in Food

Adsorption Behavior of some N-alkyl Pyridinium Salts from Aqueous Solution on Amberlite-IR 120 H+ resin

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Magnetic Solid Phase Extraction Using Ionic Liquid Coated Magnetic Core Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> Nanoparticles Followed by UV Spectrophotometry for Separation/Analysis of Safranine T in Food