Adsorption performance and mechanism of 2,4,6-trinitrotoluene on a novel adsorption material polyvinylbenzyl acid/SiO2

An, Fuqiang; Gao, Baojiao

doi:10.1016/j.apsusc.2008.12.061

Cited by 25 publications

(13 citation statements)

References 14 publications

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“…Due to the protonation at low pH and deprotonation at high pH of the amino groups of AmL, the ionization of amine breaks the H-bondings. Opposite to that, when the pH approaches to neutral, more of the -NH 2 and -NH-group are freed from the protonation [20], the hydrogen bond interaction between amino group of AmL and TNT is gradually becoming the strongest. Therefore, the adsorption capacities depend markedly on pH variation.…”

Section: Effect Of Ph On Adsorptionmentioning

confidence: 88%

“…However, these treatments cannot be widely applied due to their own problems, such as high cost, long cycle, secondary pollution, etc. Concentration methodology means essentially a mixture of adsorption with various adsorption materials such as activated carbon [5,18], PAM/SiO 2 [19], polyvinylbenzyl acid/SiO 2 (PVBA/SiO 2 ) [20], etc. Unfortunately, PAM/SiO 2 and PEI/SiO 2 have only a low adsorption capability for TNT.…”

Section: Introductionmentioning

confidence: 99%

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A modified lignin adsorbent for the removal of 2,4,6-trinitrotoluene

Zhang

Lin

Luo

et al. 2011

Chemical Engineering Journal

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Section: Effect Of Ph On Adsorptionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

A modified lignin adsorbent for the removal of 2,4,6-trinitrotoluene

Zhang

Lin

Luo

et al. 2011

Chemical Engineering Journal

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“…E decreased first and then increased to a certain degree before it leveled off as the amount of KH‐570 increased. E of PS was higher than E of KH570–PS(1); this could be explained by the fact that the benzene ring of PS could make contact with the benzene ring of the TNT, and this directly resulted in Π–Π stacking interactions 21. The KH570–PS(1) nanospheres aggregated together during the process of drying, and this resulted in a lower absorbed amount.…”

Section: Resultsmentioning

confidence: 95%

“…With increasing KH‐570 content, more and more SiOH, OC groups existed on the KH570–PS nanospheres. OH and OC were considered to be electron donors 21. In addition, because of the presence of the electron‐withdrawing NO 2 groups on the TNT molecules, the TNT molecules were characterized as highly electron deficient Π‐electron systems 22.…”

Section: Resultsmentioning

confidence: 99%

Adsorption behavior and mechanism of 2,4,6‐trinitrotoluene by functionalized polystyrene nanospheres

Zhang

Wang

et al. 2012

J of Applied Polymer Sci

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3‐Methactyloxylpropyltrimethoxyl silane (KH‐570)‐modified polystyrene (PS) nanospheres and PS nanospheres were prepared and used to absorb 2,4,6‐trinitrotoluene. The absorbed amount reached 2.81 mg/g for KH‐570‐modified PS nanospheres at 298 K and pH 6 when the initial 2,4,6‐trinitrotoluen concentration was 50 mg/L. The kinetic results showed that the pseudo‐second‐order model fit the two kinds of absorbents. The adsorption mechanism study revealed that the driving forces of adsorption were combined actions of Π–Π stacking interaction, hydrogen interaction, and hydrophobic interaction. The prepared nanospheres were reusable. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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“…Adsorption method, on the contrary, is suitable to remove low‐concentration substances,10 and hence, was chosen. Because nitro group can interact with amino11 and carboxylic groups12 through hydrogen bond, aminated and carboxylated polystyrene microspheres were used to adsorb the compounds from the distillate of TNT red water. COD, suspended substance (SS), chrominance, and acute toxicity were measured to evaluate the water quality before and after adsorption.…”

Section: Introductionmentioning

confidence: 99%

Removal of nitro aromatic compounds and sulfite acid from distillate of 2,4,6‐trinitrotoluene red water using modified porous polystyrene microspheres

Meng

Song

Zhao

et al. 2012

J of Applied Polymer Sci

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To remove the nitro aromatic compounds (NACs) and SO 3 2À from distillate of 2,4,6-trinitrotoluene (TNT) red water, the carboxylated and aminated polystyrene (PSt) microspheres were used as adsorbents. GC-MS and HPLC analysis were used to determine the types and concentrations of NACs before and after adsorption. The carboxylated PSt, which was prepared by modifying PSt with phthlandione (PA), could remove the neutral NACs including 2,6-dinitrotoluene (2,6-DNT), 2,4-dinitrotoluene (2,4-DNT), 1,3,5-trinitrobenzene (1,3,5-TNB), and 2,4,6-trinitrotoluene (2,4,6-TNT), with the acid 2,4-dinitrophenol (2,4-DNP) and SO 3 2À remained in the distillate. The aminated PSt that was synthesized by activating PSt with chloroacetyl chloride follow by reaction with 1,2-ethanediamine (EDA) could remove all the NACs and SO 3 2À . The results suggested that EDA-PSt adsorbed the NACs though multimode interactions, i.e., hydrogen bond and electrostatic attraction. After adsorption using EDA-PSt, chemical oxygen demand (COD) was reduced from 86.1 to 11.2 mg L À1 , and a colorless, transparent, and nontoxic solution with neutral pH value was obtained. Five grams of EDA-PSt could purify 1600 cm 3 of distillate of TNT red water, and the adsorbents could be recycled by elution with methanol to desorb the neutral NACs followed by elution with 0.1 mol L À1 NaOH to wash off 2,4-DNP and SO 3 2À .

show abstract

Adsorption performance and mechanism of 2,4,6-trinitrotoluene on a novel adsorption material polyvinylbenzyl acid/SiO2

Cited by 25 publications

References 14 publications

A modified lignin adsorbent for the removal of 2,4,6-trinitrotoluene

A modified lignin adsorbent for the removal of 2,4,6-trinitrotoluene

Adsorption behavior and mechanism of 2,4,6‐trinitrotoluene by functionalized polystyrene nanospheres

Removal of nitro aromatic compounds and sulfite acid from distillate of 2,4,6‐trinitrotoluene red water using modified porous polystyrene microspheres

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