A water-insoluble viologen-based β -cyclodextrin polymer for selective adsorption toward anionic dyes

Li, Xuemei; Zhou, Miaolei; Jia, Jiaxin; Jia, Qiong

doi:10.1016/j.reactfunctpolym.2018.03.004

Cited by 52 publications

(20 citation statements)

References 48 publications

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“…Moreover, the addition of charge on cyclodextrin or cyclodextrin polymers allows a good ionic interaction with the opposite charge of the guest molecule [43,44]. Cyclodextrin and their derivatives have fascinated important attention as selective and greater efficiency for environmental applications [45,46] so as to eliminate organic substances or heavy metal [47] such as organic substances [48,49], volatile organic compounds [50,51], dyes [52,53] and pesticides [54,55]). Anionic cyclodextrin polymer issued from crosslinking between β-cyclodextrin as a monomer and citric acid as a crosslinker was coated on the textile surface in order to remove organic substances [56] and heavy metals [57,58] which were contaminated in water.…”

Section: Introductionmentioning

confidence: 99%

Removal of paraquat herbicide from water by textile coated with anionic cyclodextrin polymer

et al. 2018

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The coating of anionic cyclodextrin polymer on polyethylene terephthalate (PET) textile was achieved by crosslinking between β-cyclodextrin (β-CD) and citric acid (CTR) to adsorb paraquat herbicide from aqueous solution. This coating performance (30 min, 170 °C) was 22.18% of weight gain which was corresponded to 0.51 mmol/g of ion exchange capacity (IEC). Then, the samples were characterized by scanning electron microscopy (SEM), attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) and thermogravimetric analysis (TGA). The appropriated pH was 6.5 and the equilibrium time was 420 min. At 30 °C, the adsorption capacity towards paraquat (PQ) was enhanced (4.5, 18.9 and 23.7 mg/g) when the initial concentration of paraquat was increased (10, 50 and 250 mg/L). The adsorption kinetics was fitted to the pseudo-second-order model and the adsorption isotherm was suitable to Langmuir model. For the thermodynamic studies, the negative ∆G° revealed a spontaneous process, the negative ∆H° showed an exothermic process and the positive ∆S° displayed an enhanced disorder. Finally, the reusability of functionalized textile in methanol was reached 78.6% after six regeneration cycles and the stability of sample in various solvents was also studied. Graphical abstract Anionic cyclodextrin polymer coated on PET textile issued from the crosslinking between β-cyclodextrin and citric acid was used as an efficient adsorbent for paraquat removal from aqueous solution.

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Section: Introductionmentioning

confidence: 99%

Removal of paraquat herbicide from water by textile coated with anionic cyclodextrin polymer

et al. 2018

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“…10. According to some researchers [47]- [49], the solubility of the polymer in a solvent is limited, resulting in a certain insoluble or saturated concentration. Based on the result of SEM test analysis, it is evident that the chitosan membrane has a pore size, which equals 1.05 μm.…”

Section: G Electron Microscopy Scanning Test Results (Sem)mentioning

confidence: 99%

Purification of Sugarcane Juice (Saccharum officinarum L.) Using Chitosan Membrane with Dead-End Flow System

Hendrawan¹,

Diyaratnasari²,

Sutan³

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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The purification process of sugarcane juice in a sugar factory mostly uses sulphitation process, separating clear juice from dirty juice using a sedimentation system. Impurities on the processing of sugarcane juice will further cause difficulties, the formation of color, an increase in viscosity, and reducing sugar recovery. Membrane purification technology is offered to overcome these problems. This study aims to determine the effect of chitosan and acetic acid on the performance of chitosan membranes in the clearance of sugarcane juice and to find the best concentration of chitosan and acetic acid for the purification process of sugarcane juice. The filtration process was performed by using the chitosan membrane to process a clear sugarcane juice sample from the pretreatment result, which is assumed as clear juice product from sulphitation process in sugar factory. The results showed that (1) the result of pretreatment had the value from TSS (Total Soluble Solids) of 15.4%; turbidity of 82.33 NTU; and the ICUMSA (International Commission for Uniform Methods of Sugar Analysis) colour of 14970.02 IU. (2) After filtration using membrane, better quality of pretreatment clear sugarcane juice is obtained, characterized by increasing chitosan concentration at each acetic acid level, rejection value of TSS, turbidity, and ICUMSA colour. (3) The best treatment result based on Zeleny multiple attribute method is found in chitosan membrane with concentration of 4%, acetic acid concentration of 1.5% to inject TSS until reaching 12.64%, ICUMSA until reaching 9.89%, and rejection of turbidity until reaching 63.61%. Higher chitosan concentration caused small pore size of the membrane.

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“…Results indicated the SPEN-Al-2 were negatively charged, and the zeta potential presented a decreased trend along with the increase of pH, as shown in Figure 6B, suggesting the high original ionization ability of SPEN-Al-2. The zeta potential manifested that alkaline solutions would contribute to the ionization of MB and activated the positively-charged groups on SPEN-Al-2, which subsequently would enhance the electrostatic interaction between the adsorbent and adsorbate, resulting in an increased adsorption capacity [35]. The acidic environment tended to restrict the ionization of carboxyl radicals and sulfonic radicals of SPEN-Al-2, which would bring in not only the electrostatic repulsion between SPEN-Al-2 and MB but also the competitive adsorption between H + ions and cationic MB, resulting in a decreased adsorption capactity [33].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Sulfonated Poly(arylene ether nitrile)-Based Adsorbent as a Highly Selective and Efficient Adsorbent for Cationic Dyes

et al. 2018

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In this work, a highly selective and efficient polymer adsorbent inspired by a water-soluble sulfonated poly(arylene ether nitrile) (SPEN) was successfully synthesized. Due to the distinct structure of functional carboxyl, sulfonic acid and rigid benzene rings, a facile aluminium (III) ions crosslinking method was employed to fabricate the SPEN-based adsorbents (SPEN-Al). Among the three adsorbents, SPEN-Al-2 exhibited superior adsorption capacities with uniform morphology. Subsequently, the SPEN-Al-2 was selected as the adsorbent for three cationic dyes (rhodamine B (Rh B), neutral red (NR), methylene blue (MB)) and three anionic dyes (orange G (OG), methyl orange (MO), acid fuchsin (AF)), respectively, demonstrating that the adsorbent possessing excellent selectivity toward cationic dyes. Moreover, the dye’s adsorption selectivity of SPEN-Al-2 was further certificated in a binary cationic-anionic dyes mixtures (MB/OG and MB/MO) system. Taking MB as a dye model, a series of factors (contact time, concentration, temperature and pH) and adsorption models were systematically investigated in dye adsorption experiments. Results indicated that the adsorption was endothermic and the maximum adsorption capacity of SPEN-Al-2 could reach up to 877.5 mg/g; pseudo-second-model and Langmuir model were fitted to the adsorption kinetics and equilibrium isotherm, respectively, manifesting that SPEN-Al adsorbent was promising in the dyes removing field.

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A water-insoluble viologen-based β -cyclodextrin polymer for selective adsorption toward anionic dyes

Cited by 52 publications

References 48 publications

Removal of paraquat herbicide from water by textile coated with anionic cyclodextrin polymer

Removal of paraquat herbicide from water by textile coated with anionic cyclodextrin polymer

Purification of Sugarcane Juice (Saccharum officinarum L.) Using Chitosan Membrane with Dead-End Flow System

Preparation of Sulfonated Poly(arylene ether nitrile)-Based Adsorbent as a Highly Selective and Efficient Adsorbent for Cationic Dyes

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