Effect of ionic strength on the adsorption behavior of phenol over modified activated clay

Wang, Shanshan; Qiao, Nannan; Yu, Jiahui; Huang, Xiaoli; Hu, Mingshang; Ma, Hongzhu

doi:10.1080/19443994.2014.989269

Cited by 14 publications

(7 citation statements)

References 28 publications

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“…As a result, the removal rate of RG-19 dye is decreasing. 40 This investigation is supporting the strong contribution of electrostatic interaction mechanism of this adsorption process. On the other hands, the increasing of ionic strength leads to the decreasing the removal e ciency of RG-19 dye that mainly because the increasing of pH.…”

Section: Removal Of Rg-19 Dye By Flasupporting

confidence: 69%

Functionalized lignin-based-adsorbent derived from black liquor in the paper industry for superior adsorption characteristics.

Hamad

Elhafez

Sorour

et al. 2021

Preprint

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Lignin's availability in large amounts from industrial black liquor as waste from the paper industry is still a problem. On the other hand, its utilization potentials as a green low-cost adsorbent for the effective removal of toxic organic dye from industrial wastewater has become a topic of great interest but remains quite challenging. In this sense, this work aimed to evaluate the feasibility of removing the reactive green dye (RGD) onto the functionalized lignin-based adsorbent (FLA) by the acidic method. The kinetic study suggested the adsorption process confirmed to a pseudo-second-order-kinetic and intra-particle diffusion models. Also, the isotherm results showed that the FLA exhibited multi-layer adsorption. Meanwhile, the results of FTIR and SEM showed that the RG-19 adsorption mechanisms were electrostatic interaction, hydrogen bonding, π-π stacking, and physical adsorption. Thermodynamic parameters were also evaluated and their values indicated that adsorption of RG-19 onto FLA is an exothermic process and spontaneous in nature. As a renewable, low-cost, and natural biomass material, FLA has the potential to be used as a promising sustainable and economic application of biomass and will inspire more scholars to investigate solutions to the problem of contaminated water resources.

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Section: Removal Of Rg-19 Dye By Flasupporting

confidence: 69%

Functionalized lignin-based-adsorbent derived from black liquor in the paper industry for superior adsorption characteristics.

Hamad

Elhafez

Sorour

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…This indicated that the process was more spontaneous at higher temperature. While the positive (∆H°) and (∆S°) an indication that (MV) adsorption on B and B-SDS is a endothermic and randomized process [34].…”

Section: Thermodynamic Parametersmentioning

confidence: 95%

Adsorption of Methyl Violet Dye from Aqueous Solution by Iraqi Bentonite and Surfactant â€“ Modified Iraqi Bentonite

Mohammed¹,

Al-Heetimi²

2019

IHJPAS

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Natural bentonite (B) mineral clay was modified by anionic surfactant sodium dodecyl sulfate (SDS) and characterized using different techniques such as: FTIR spectroscopy, scanning electron microscopy (SEM) and X-Ray diffraction (XRD). The bentonite and modified bentonite were used as adsorbents for the adsorption of methyl violet (MV) from aqueous solutions. The adsorption study was carried out at different conditions such as: contact time, pH value and adsorbent weight. The adsorption kinetic described by pseudoâ€“ first order and pseudo â€“ second order equilibrium experimental data described by Langmuir, Freundlich and Temkin isotherm models. The thermodynamic parameters standard free energy ( ), standard entropy ( ) standard enthalpy ( ) were investigated and determined.

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“…The authors [27] also had similar results when methylene blue removed decreased from 81.5 to 14 mg/g when the ionic strength increased from 0.00 to 0.1 M using orange peel as an adsorbent. The presence of salts in solution blocks the active sites of the adsorbents thereby preventing the RB molecules from attaching to the surface, hence reducing the removal efficiency [27,28] (Table 5).…”

Section: Influence Of Ionic Strength On Rb Removalmentioning

confidence: 99%

Removal of Rhodamine B from aqueous solution using silica extracted from rice husk

2020

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Global annual production of rice husk is approximately 120 million tons. It doesn't easily biodegrade, resulting in disposal problems. This paper therefore, investigated the use of silica obtained from the burning of the raw rice husk in open air (RHSA) and in a Muffle Furnace at 540 °C (RHSO). The efficiency of the two silica samples in removing Rhodamine B (RB) from aqueous solution was tested using different process parameters. 89% silica was obtained from either method. The removal of RB was more possible on RHSA than on RHSO. This was revealed by calculated Langmuir R L values of 0.152 for RHSA and 0.558 for RHSO. This was also supported by the obtained Temkin isotherm equilibrium constants values of 3.379 and 0.677 L/mg for RHSA and RHSO respectively. Langmuir monolayer capacities of 6.0 and 6.87 mg/g were obtained for RHSA and RHSO respectively. Increased in mass of RHSA or RHSO greatly enhanced RB removal (65% with 0.05 g to 98% with 0.5 g for RHSA). Optimal removal conditions on each sample were; temperature 27 °C, mass adsorbent 0.5 g, pH 7.05, contact time 24 h and 10 mg/L of RB initial concentration. The RB removal was negatively affected by ionic strength, decreasing from 84 to 46% for RHSA and 60-41% for RHSO with increase in ionic strength from 0.00 to 2 M. The two adsorbents are efficient in RB removal and easily regenerated as it is purely a physical process.

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Effect of ionic strength on the adsorption behavior of phenol over modified activated clay

Cited by 14 publications

References 28 publications

Functionalized lignin-based-adsorbent derived from black liquor in the paper industry for superior adsorption characteristics.

Functionalized lignin-based-adsorbent derived from black liquor in the paper industry for superior adsorption characteristics.

Adsorption of Methyl Violet Dye from Aqueous Solution by Iraqi Bentonite and Surfactant â€“ Modified Iraqi Bentonite

Removal of Rhodamine B from aqueous solution using silica extracted from rice husk

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