Kinetics and Thermodynamics of Adsorption of Chlorophenols onto &lt;em&gt;&amp;beta;&lt;/em&gt;-Cyclodextrin Modified Chitosan

Zhou, Liang-Chun; Meng, Xianghai; Li, Jianmei; Hu, Wei; Liu, Bo; Du, Juan

doi:10.3866/pku.whxb201204282

Cited by 8 publications

(1 citation statement)

References 28 publications

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“…5748 2019; Yazdanpanah and Nojavan 2019). Researchers have demonstrated that modified cyclodextrin has good reusability in the absorption of organic compounds (Zhou et al 2012;Feng et al 2016). Feng et al (2016) prepared Fe3O4/hydroxypropyl-β-cyclodextrin polymer magnetic nanomaterials to absorb malachite green, and the absorption rate of the solid-phase extraction agent was 92% and could be used 5 times.…”

Section: Introductionmentioning

confidence: 99%

Novel poly(β-cyclodextrin) porous material as solid phase extraction sorbent for aniline derivatives in rubber samples

Dai¹,

Yin

et al. 2021

BioRes

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Aniline derivates are widely used in rubber products as anti-aging agents, but their biological toxicity causes harm in the use and recycling of rubber products. Therefore, in this study, a high-performance poly(3,4,5,6-tetra-fluorophthalonitrile-β-cyclodextrin)(P-TFPN-β-CD) solid-phase extraction (SPE) adsorbent was synthesized and applied to extract and detect aniline derivatives in rubber specimens. After crosslinking with 3,4,5,6-tetrafluorophthalonitrile (TFPN), the polymer exhibited mesopores (7.88 nm) and a large specific area (55.2 m2/g). The porous structure significantly improved the extraction efficiency (recovery was between 90.1% and 110.5%) and rate (60% in 10 s) of 4 aniline derivatives (aniline, N-ethyl aniline, 1,2-phenylenediamine, and p-phenylenediamine). With a combined gas chromatographic-flame ionization detector (GC-FID), the extracted aniline derivatives were accurately detected (RSD = 1.60% to 9.90%). Due to the weak interaction between P-TFPN-β-CD and analyte, the prepared poly-TFPN-β-CD SPE adsorbent was regenerated via mild washing with methanol. The high absorption capacities remained after 4 extracting-washing cycles. The novel porous SPE adsorbent showed good extracting and recycling performance for the analysis and detection of aniline compounds in rubber. Thus, it has good prospects for application to improve detection efficiency and reduce cost.

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Section: Introductionmentioning

confidence: 99%

Novel poly(β-cyclodextrin) porous material as solid phase extraction sorbent for aniline derivatives in rubber samples

Dai¹,

Yin

et al. 2021

BioRes

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Biomass for water defluoridation and current understanding on biosorption mechanisms: A review

Manna

Roy

Adhikari

et al. 2018

Env Prog and Sustain Energy

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Excessive fluoride (above 1.5 mg/L) containing water consumption for prolonged periods could pose health hazards, for example, dental fluorosis. Longer exposure could also cause skeletal fluorosis leading to the permanent deformity to skeleton. In the current context, use of biomasses for defluoridation would be a most economic and sustainable option for water defluoridation over the available alternatives. This article presents a brief summary of processes used biomasses for fluoride removal from aqueous solutions. This article also discusses the theoretical and instrumental approaches used by the researchers till date to understand the defluoridation mechanisms. The literature survey pointed that theoretical models such as Langmuir and Freundlich isotherms, pseudo‐first‐order and second‐order kinetic models, and different thermodynamic equations were also used to define the defluoridation by biomasses. Apart from the theoretical modeling, several researchers have also tried to understand the biomass‐based defluoridation by applying advanced instruments, for example, FTIR, XPS, NMR, TG, FESEM, and Raman spectroscopic analysis. © 2018 American Institute of Chemical Engineers Environ Prog, 37: 1560–1572, 2018

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Adsorption of chlorophenols from aqueous solution over amino-modified ordered nanoporous silica materials

et al. 2014

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The capability of the adsorption of 2-chlorophenol (2-CPh) and 2,4-dichlorophenol (2,4-DCPh) from aqueous solutions with mesoporous silica material MCM-48 after functionalizing with amine groups, such as 3-(trimethoxysilyl)propyl amine and tetraethylenepentamine, was investigated in this study. It was found that amino-modified ordered mesoporous silica materials show significant adsorption for 2-CPh and 2,4-DCPh. This is possible due to the alkaline and acid interactions among the amine functional groups and chlorophenols. The adsorbents were characterized by X-ray diffraction, nitrogen adsorption-desorption isotherms and Fourier transform infrared. Batch adsorption studies were done to study the effect of various parameters like chemical modification, pH, contact time, adsorbent dose and initial concentration. It was found that adsorption of 2-CPh and 2,4-DCPh depends upon the solution pH. Adsorption data were modeled with the Langmuir and Freundlich adsorption isotherms. The data fitted the Freundlich isotherm model better than Langmuir. The kinetics analysis revealed that the overall adsorption process was successfully fitted with the pseudo-first-order kinetic model.

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Kinetics and Thermodynamics of Adsorption of Chlorophenols onto <em>β</em>-Cyclodextrin Modified Chitosan

Cited by 8 publications

References 28 publications

Novel poly(β-cyclodextrin) porous material as solid phase extraction sorbent for aniline derivatives in rubber samples

Novel poly(β-cyclodextrin) porous material as solid phase extraction sorbent for aniline derivatives in rubber samples

Biomass for water defluoridation and current understanding on biosorption mechanisms: A review

Adsorption of chlorophenols from aqueous solution over amino-modified ordered nanoporous silica materials

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