Thermodynamics aspect of tannin sorption on polymeric adsorbents

Li, Haitao; Jiao, Yinchun; Xu, Mancai; Shi, Zhijun; He, Binqlin

doi:10.1016/j.polymer.2003.11.013

Cited by 55 publications

(42 citation statements)

References 15 publications

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“…The value of H is negative, indicating an exothermic process [19]. The value of H decreases with increasing the adsorption capacity resulted from the surface energetic heterogeneity of HJ-G02 [13,18]. The value of G is also negative, indicating that the adsorption is a spontaneous process.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…Adsorption experiments indicated that the synthesized resin displayed excellent adsorption properties towards non-polar and weakly polar aromatic compounds [8,9], whereas its adsorption capacity towards polar aromatic compounds such as salicylic acid and 4-aminobenzoic acid was relatively small [10,11]. Hence, in order to increase the adsorption capacities of the resin towards polar aromatic compounds, chemical modification is frequently considered by introducing some specific functional groups such as amino, amide, hydroxyl, carbonyl and carboxyl groups into the surface of the resin [12][13][14][15]. The results indicated that such chemically modified resins possessed an increased adsorption capacity towards polar aromatic compounds [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, in order to increase the adsorption capacities of the resin towards polar aromatic compounds, chemical modification is frequently considered by introducing some specific functional groups such as amino, amide, hydroxyl, carbonyl and carboxyl groups into the surface of the resin [12][13][14][15]. The results indicated that such chemically modified resins possessed an increased adsorption capacity towards polar aromatic compounds [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced adsorption of salicylic acid onto a β-naphthol-modified hyper-cross-linked poly(styrene-co-divinylbenzene) resin from aqueous solution

Huang

Wang

Huang

2011

Chemical Engineering Journal

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Section: Adsorption Isothermsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced adsorption of salicylic acid onto a β-naphthol-modified hyper-cross-linked poly(styrene-co-divinylbenzene) resin from aqueous solution

Huang

Wang

Huang

2011

Chemical Engineering Journal

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“…Optimization of designing a certain adsorption system is possible only by considering the basic aspects of adsorption process such as adsorption isotherm, adsorption enthalpy, adsorption Gibbs free energy, adsorption entropy and isosteric heat of adsorption (Haitao Li et al 2004). Isotherm parameters explain the mode of interaction between adsorbate and adsorbent and are also used for the assessment of thermodynamic parameters affecting adsorption process, which can be used as a better tool for deducing adsorption mechanism.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of chromium(III) adsorption onto a cation exchanger derived from saw dust of Jack wood

Anirudhan

Radhakrishnan

2009

Environ Chem Lett

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A novel cation exchanger, polymethacrylic acid-grafted saw dust (SD) with spacer group (SP) containing carboxylate functional group at the chain end (SDGPMA-SP-COOH) was prepared from saw dust of Jack wood, and its adsorption equilibrium and thermodynamics of Cr(III) ions were studied at different initial concentrations and temperatures at pH 7.0 using batch technique. Thermodynamic parameters such as change in standard free energy, DG 0 , standard enthalpy, DH 0 and standard entropy, DS 0 were determined. The values of isosteric heat of adsorption (DH x ) remain constant at different surface loading of Cr(III) indicating homogeneous surface sites and the absence of lateral interaction between adsorbed ions.

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“…It has an excellent stability at high temperatures and under physical stresses and is dimensionally stable under a wide variety of conditions due to its rigid network structure. It finds applications in chromatographic columns, exchange resins [5][6][7][8], and enzyme immobilization [9] and can be used in a wide pH range. It is possible to modify its surface so that it can be used as a catalytic support and for other applications [10].…”

mentioning

confidence: 99%

Copolymerization Kinetics of Styrene and Divinylbenzene in the Presence of S‐Thiobenzoyl Thioglycolic Acid as RAFT Agent

Roa‐Luna¹,

Jaramillo‐Soto²,

Castaneda-Flores³

et al. 2010

Chem Eng & Technol

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An experimental study on the kinetics of the reversible addition-fragmentation chain transfer (RAFT) copolymerization of styrene (STY) and divinylbenzene (DVB) is presented. The experiments were carried out in bulk from a mixture of monomers, S-thiobenzoyl thioglycolic acid as RAFT agent, and the initiator dibenzoyl peroxide (BPO) at 80°C. The effect of RAFT agent concentration, including the case without RAFT controller, on polymerization rate, molecular weight development, gel fraction, and swelling index was analyzed. IntroductionCross-linked polymers (polymer networks) are used in many technological areas, e.g., as paints, construction materials, coatings, polymer glasses with high mechanical strength and high thermal stability, superabsorbent materials, food packaging, implants, controlled drug-release matrices, and artificial organs [1,2], to name a few applications. Poly(styrene-co-divinylbenzene) is a cross-linked polymer with attractive properties. It has an excellent stability at high temperatures and under physical stresses and is dimensionally stable under a wide variety of conditions due to its rigid network structure. It finds applications in chromatographic columns, exchange resins [5][6][7][8], and enzyme immobilization [9] and can be used in a wide pH range. It is possible to modify its surface so that it can be used as a catalytic support and for other applications [10].Controlled/living radical polymerization (CLRP) processes allow the synthesis of polymer materials with controlled microstructures which find usage in technologically important areas, such as aerospace, nanotechnology, industrial electronics, and biomaterials [9][10][11][12][13]. Reversible addition-fragmentation transfer (RAFT) polymerization has proven to be one of the most effective CLRP processes because of its advantages over other CLRP techniques (atom-transfer radical polymerization (ATRP) and nitroxide-mediated radical polymerization (NMRP)), such as the applicability of the technique to a larger range of monomer types, reaction conditions (temperature and pressure), and processes (homogeneous and heterogeneous) [14,15].Most applications of polymer networks require homogeneous structures to obtain optimal performance. However, polymer networks obtained by free-radical copolymerization of vinyl/divinyl monomers are heterogeneous in nature. It would be desirable to have a synthetic route to synthesize homogeneous polymer networks using free radical technology. This goal may be achieved by copolymerizing vinyl and divinyl monomers in the presence of CLRP controllers [6].The production of polymer networks by controlled/living radical copolymerization (CLRC) techniques, including the copolymerization of vinyl/divinyl monomers, has already been addressed in the literature for the cases of INIFERTER [16][17][18][19], ATRP [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36], NMRP [6,[37][38][39][40][41][42][43][44][45][46][47], and RAFT [48][49][50][51][52][53][54][55][56][57][58][59][60]. A short review of thes...

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Thermodynamics aspect of tannin sorption on polymeric adsorbents

Cited by 55 publications

References 15 publications

Enhanced adsorption of salicylic acid onto a β-naphthol-modified hyper-cross-linked poly(styrene-co-divinylbenzene) resin from aqueous solution

Enhanced adsorption of salicylic acid onto a β-naphthol-modified hyper-cross-linked poly(styrene-co-divinylbenzene) resin from aqueous solution

Thermodynamics of chromium(III) adsorption onto a cation exchanger derived from saw dust of Jack wood

Copolymerization Kinetics of Styrene and Divinylbenzene in the Presence of S‐Thiobenzoyl Thioglycolic Acid as RAFT Agent

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