Adsorption of tannic acid from aqueous solution onto surfactant-modified zeolite

Lin, Jianwei; Zhan, Yanhui; Zhu, Zhiliang; Xing, Yunqing

doi:10.1016/j.jhazmat.2011.07.035

Cited by 112 publications

(76 citation statements)

References 46 publications

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“…But at pH = 3, the capacity of adsorption still keeps to a certain level (10.04 mg/mL). The hydrogen bonding and organic partitioning may be responsible for the removal of TA adsorbed on MIEX at pH = 3 [2]. When the initial pH of solution increased from 8 to 11, the adsorption capacity of TA on MIEX resin increased rapidly from 11.34 to 14.25 mg/mL, showing that alkalinity furthers the removal of TA adsorbed on MIEX resin.…”

Section: Effect Of Initial Ph Of Solutionmentioning

confidence: 96%

“…A volume of 0.25 mL MIEX resin was added into 500 mL of a series of TA solutions with the various concentrations (1,2,3,4,5,6,7,8,9, and 10 mg/L) in 800 mL beakers. These solutions were then agitated at a constant speed of 150 rpm for 150 min.…”

Section: Adsorption Equilibrium Studiesmentioning

confidence: 99%

“…The pH of a solution is an important variable that governs the adsorption system by controlling the surface properties of adsorbents and adsorbate form [2]. Fig.…”

Section: Effect Of Initial Ph Of Solutionmentioning

confidence: 99%

“…When the initial pH of solution increased from 8 to 11, the adsorption capacity of TA on MIEX resin increased rapidly from 11.34 to 14.25 mg/mL, showing that alkalinity furthers the removal of TA adsorbed on MIEX resin. However, many researchers have reported that the removal of TA adsorbed on various adsorbents decreased with increasing pH when pH is above 8 [2,[12][13]15]. Also, the removal of anions (such as bromide, phosphate) using MIEX resin decreased when pH was above 8 [26][27].…”

Section: Effect Of Initial Ph Of Solutionmentioning

confidence: 99%

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mentioning

confidence: 99%

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Removal Characteristics of Tanic Acid Adsorbed on MIEX Resin

Ding¹,

Zhu²,

Du³

et al. 2017

Pol. J. Environ. Stud.

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Tannic acid (TA) is a component of natural organic matter (NOM) and is ubiquitously present in most surface and groundwater due to the decomposition of plant biomass [1][2]. Previous research has demonstrated that TA is toxic for aquatic organisms such as algae, phytoplankton, fish, and invertebrates, which can cause serious environment problems [3]. Particularly, TA can react with chlorine and form carcinogenic disinfection by-products (DBPs) during the conventional chlorination disinfection process of drinking water [4][5]. Therefore, it is necessary to seek effective methods for reducing and removing TA from raw water. [12,16] have been utilized to remove TA from water and wastewater. Among different adsorbents, the anion ion-exchange resin is considered one of the most effective methods due to its high removal efficiency [17]. As a novel anion ionexchange resin, magnetic ion exchange (MIEX) resin can be a potential candidate for TA removal with its promising technology for NOM removal from drinking water [18].Pol. J. Environ. Stud. Vol. 26, No. 3 (2017) This study evaluated the removal characteristics of tanic acid (TA) adsorbed on MIEX resin by batch experiments. MIEX resin can effectively remove TA from raw water at pH 6-9. Chloride and sulfate have adverse effect on the removal of TA. Conversely, bicarbonate can further the removal of TA. The Elovich model is the most suitable for depicting the kinetic process, and liquid film diffusion dominates the adsorption rate. The Freundlich model is reliable for describing the adsorption equilibrium. Adsorption is an endothermic, entropy-driving, and thermodynamically spontaneous process. The energy changes confirm the physical adsorption and dominate adsorption behavior. The sodium chloride solution (0.5%) can effectively regenerate the MIEX resin saturated TA, and the regenerated resin can be used circularly. Therefore, MIEX resin is a promising adsorbent for the removal of TA from raw water.

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Section: Effect Of Initial Ph Of Solutionmentioning

confidence: 96%

Section: Adsorption Equilibrium Studiesmentioning

confidence: 99%

“…The pH of a solution is an important variable that governs the adsorption system by controlling the surface properties of adsorbents and adsorbate form [2]. Fig.…”

Section: Effect Of Initial Ph Of Solutionmentioning

confidence: 99%

Section: Effect Of Initial Ph Of Solutionmentioning

confidence: 99%

“…

…”

mentioning

confidence: 99%

See 3 more Smart Citations

Removal Characteristics of Tanic Acid Adsorbed on MIEX Resin

Ding¹,

Zhu²,

Du³

et al. 2017

Pol. J. Environ. Stud.

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Highly efficient removal of bulky tannic acid by millimeter‐sized nitrogen‐doped mesoporous carbon beads

Chong

Liu

et al. 2017

AIChE Journal

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Millimeter‐sized nitrogen‐doped mesoporous carbon beads (NMCBs) with a controllable nitrogen content are synthesized for the first time via a suspension‐polymerization assisted hard templating method. In contrast to conventional activated carbons, NMCBs exhibit outstanding structural advantages, including macroscopic morphology, a developed mesoporous structure and enriched surface chemistry. When used as adsorbents for the removal of the bulky organic pollutant tannic acid, these NMCBs demonstrated fast adsorption kinetics and very high adsorption capacity. The adsorption capacity strongly depends on the nitrogen content doped into the carbon framework. At a nitrogen content of 4.1 wt %, the adsorption capacity reaches 318 mg g−1. The molecular mechanics simulation and zeta potential measurements suggest that the enhanced adsorption by nitrogen doping may be due to the electrostatic attraction between the nitrogen functional groups and the phenol groups of tannic acid. © 2017 American Institute of Chemical Engineers AIChE J, 63: 3016–3025, 2017

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Improvement of zeolites on solidification/stabilization of mercury‐contaminated wastes in chemically bonded phosphate ceramics: stabilization effect and mechanism study

Zhang

Lin

2015

Asia-Pacific J Chem Eng

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In this study, two kinds of zeolites materials [natural zeolite (NZ) and thiol-functionalized zeolite] were added to the chemically bonded phosphate ceramics (CBPCs) processes for the stabilization/solidification (S/S) of mercurycontaminated hazardous wastes. The stabilization effect of the process and the stabilization mechanism are investigated in detail. Strong promotion effects of zeolites on the stability of mercury in the hazardous wastes were obtained, and the technology showed great advantages toward traditional Portland cement process. Not only high stabilization efficiency is obtained but also lower dosage of solidification and stabilization agents were used compared with Portland cement process. Treated by thiol-functionalized zeolite (TFZ) and CBPC under optimum parameters, the waste containing 1500 mg Hg/kg could successfully pass the Toxicity Characteristic Leaching Procedure (TCLP) test. The S/S technology using NZ and CBPC could effectively reduce the mercury waste containing 625 mg Hg/kg pass the TCLP limit. The functions of NZ for reinforcing S/S of Hg-containing CBPC matrixes could be assumed as physical filling by fine zeolites particles and microencapsulation by cementing gel formed by zeolites and phosphate; while for CBPC and TFZ processes, the reaction of SH with Hg to form HgS may play a major role in the stabilization of mercury.

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Adsorption of tannic acid from aqueous solution onto surfactant-modified zeolite

Cited by 112 publications

References 46 publications

Removal Characteristics of Tanic Acid Adsorbed on MIEX Resin

Removal Characteristics of Tanic Acid Adsorbed on MIEX Resin

Highly efficient removal of bulky tannic acid by millimeter‐sized nitrogen‐doped mesoporous carbon beads

Improvement of zeolites on solidification/stabilization of mercury‐contaminated wastes in chemically bonded phosphate ceramics: stabilization effect and mechanism study

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