Application of the Polanyi potential theory to phthalates adsorption from aqueous solution with hyper-cross-linked polymer resins

Xu, Zhaoyi; Zhang, Weimin; Pan, Bo; Hong, Changhong; Lv, Lu; Zhang, Qingjian; Pan, Bingjun; Zhang, Quanxing

doi:10.1016/j.jcis.2007.12.015

Cited by 27 publications

(7 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Subsequently, tannin will take the place of the water molecules and form hydrogen bonding with PAM. This process can be called “solvent replacement,”25, 26 and it should be an exothermic process 27, 28. Due to the strong hydrophilicity of PAM, the adsorption sites of PAM are completely occupied by water molecules.…”

Section: Resultsmentioning

confidence: 99%

Greatly improved adsorption of N‐methylated modified macroporous cross‐linked polyacrylamide toward tannin from aqueous solution

Huang

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

Macroporous cross-linked poly(N-methylacrylamide) (PMAM) was prepared and the adsorption behaviors of PMAM toward tannin from aqueous solution was studied in comparison with polyacrylamide (PAM). The swollen property indicated that PMAM had a higher hydrophobicity than PAM while the adsorption showed that PMAM had a greatly improved adsorption toward tannin. The adsorption data could be fitted well by Freundlich model and the values of the thermodynamic parameters of PMAM toward tannin were more negative than PAM. The multiple hydrogen bonding and hydrophobic interaction between PAM/PMAM and tannin were shown to be responsible for the adsorption, whereas a stronger hydrogen bonding and a higher hydrophobicity of PMAM had a contribution to the greatly improved adsorption of PMAM toward tannin.

show abstract

Section: Resultsmentioning

confidence: 99%

Greatly improved adsorption of N‐methylated modified macroporous cross‐linked polyacrylamide toward tannin from aqueous solution

Huang

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Venkata-Mohan et al ( 2007) relataram 53,2-82,6% de remoção de DEP por adsorção com CA. Outros adsorventes, tais como grânulos de quitosana e resinas poliméricas, também foram investigadas para remoção de ftalato e sua eficiência de remoção é relatada em 90% (Xu et al, 2008, Salim et al, 2010.…”

Section: Isotermas De Adsorção De Dep Em Caunclassified

Adsorção do dietil ftalato (DEP) em carvão ativado (CA) de casca de coco verde: caracterização físico-química e influência dos parâmetros operacionais

Almeida

Sá

Pereira

et al. 2021

RSD

View full text Add to dashboard Cite

A caracterização físico-química do CA na eliminação de DEP em efluente sintético foi estudada. Através das cinéticas e isotermas de adsorção, conforme delineamento fatorial de 11 ensaios e modelos matemáticos, verificou-se a influência da temperatura, pH, massa do CA. CA apresentou baixa área superficial (554, 228 m2 g-1), área microporosa (460,0539 m2 g-1) e volume microporoso elevado (0,253081 cm3 g-1) pelo método de BET e BJH, e devido a ativação, elevada basicidade, pHPZC (7,2). A análise elementar e dos grupos funcionais da superfície pelo método de Boehm revelaram predominância de grupos básicos (0,845 meq g-1), lactonas (0,211 meq g-1) e fenóis (0,169 meq g-1), confirmado na espectroscopia no infravermelho (IRTF) pela presença de grupamentos quinona, lactona e carbonila. O tratamento de adsorção apresentou superiores coeficientes de determinação (R2 > 0,90) no estudo das cinéticas para o modelo de pseudo-segunda ordem, e das isotermas, para o de Freundlinch. O CA apresentou, 83,5% de taxa de eliminação de DEP, uma capacidade de adsorção de DEP de 27,006 mg g-1 em pH 7, com 0,4 g de CA a 30ºC em 360 minutos, entretanto, reduziu em 13% a sua taxa e 20,598 mg g-1 de capacidade de adsorção em pH 11, com 0,2 g de CA a 15ºC em 360 minutos. Para a capacidade de adsorção e taxa de eliminaçao de DEP não ocorreu diferença significativa nos tratamentos com (p < 0,5). Na Análise Termogravimétrica (ATG), a decomposição próximo a 600ºC, e pela Microscopia Eletrônica de Varredura (MEV), as propriedades texturais foram mantidas.

show abstract

“…It has been reported that 83% of DEP was adsorbed by activated carbon at a pH of less than 7 [ 1 ]. Xu et al [ 9 ] found that the adsorption capacity of DEP by two commercial resins was greater than that of activated carbon; however, these adsorbents need to be further treated, and the adsorption performance is significantly related to aqueous pH, which results in a higher treatment cost and lower treatment efficiency, respectively.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Application of Immobilized Surfactant-Modified PANi-CNT/TiO2 under Visible-Light Irradiation

et al. 2017

View full text Add to dashboard Cite

Hydrothermally and sol-gel-synthesized immobilized surfactant-modified polyaniline-carbon nanotubes/TiO2 (PANi-CNT/TiO2) photocatalysts were prepared and their application in the degradation of diethyl phthalate (DEP) under visible light at 410 nm was investigated in this sturdy. To improve the dispersion of nanoparticles and the transfer of electrons, the TiO2 surface was modified with both sodium dodecyl sulfate (SDS) and functionalized carbon nanotubes (CNT-COOH and CNT-COCl). With the addition of PANi, which was increased from 1–5%, the adsorption edge of the prepared photocatalysts shifted to 442 nm. The SDS linked the PANi polymers to achieve a thickness of coating of the film of up to 314–400 nm and 1301–1600 nm for sol-gel hydrolysis and hydrothermally-synthesized photocatalysts, respectively. An appropriate film thickness would extend the transfer path of the electrons and inhibit the recombination of the electrons and the electron-holes. The photo-degradation performance of DEP by the hydrothermally-synthesized photocatalysts was better than those by sol-gel hydrolysis. The results revealed that the hydroxyl radicals were the key oxidant in the degradation of DEP using hydrothermally-synthesized PANi-CNT/TiO2 photocatalysts. The morphology and functional groups of the raw materials of photocatalysts were characterized and a comparison of photocatalytic activity with other TiO2-based photocatalysts was also provided.

show abstract

Application of the Polanyi potential theory to phthalates adsorption from aqueous solution with hyper-cross-linked polymer resins

Cited by 27 publications

References 31 publications

Greatly improved adsorption of N‐methylated modified macroporous cross‐linked polyacrylamide toward tannin from aqueous solution

Greatly improved adsorption of N‐methylated modified macroporous cross‐linked polyacrylamide toward tannin from aqueous solution

Adsorção do dietil ftalato (DEP) em carvão ativado (CA) de casca de coco verde: caracterização físico-química e influência dos parâmetros operacionais

Preparation and Application of Immobilized Surfactant-Modified PANi-CNT/TiO2 under Visible-Light Irradiation

Contact Info

Product

Resources

About