β-cyclodextrin-containing polymer based on renewable cellulose resources for effective removal of ionic and non-ionic toxic organic pollutants from water

Adsorption of cationic/anionic dyes and endocrine disruptors by yeast/cyclodextrin polymer composites

“…This is because the amorphous region of the adsorbent favors the adsorption of target compounds. 37 3.1.2 Contact angle and zeta potential measurement. The surface hydrophobicity of the adsorbent material affects the adsorption performance of target pollutants.…”

Synthesis and Characterization of Environmentally Friendly β-Cyclodextrin Cross-Linked Cellulose/Poly(vinyl alcohol) Hydrogels for Adsorption of Malathion

“…The C–O–C and C–OH stretching vibrations were identified at 1157 and 1028 cm –1 , respectively, with a broad peak at 3423 cm –1 attributable to the hydroxyl group (OH) stretching vibration, present in β-CD, cellulose, and PVA. These peaks confirmed the presence of β-CD, cellulose, and PVA in the hydrogels. , The absence of the 1028 cm –1 peak in the CP7C hydrogel indicated the lack of an β-CD. A reduced intensity of the 3423 cm –1 peak in the hydrogels, compared to pure β-CD and cellulose, suggests a decrease in hydroxyl groups and hydrogen bonding, resulting from the cross-linking reaction between ECH and the hydroxyl groups of β-CD, cellulose, and PVA. , After the adsorption of malathion (MT), the sample was labeled CP1C-MT, as depicted in Figure b.…”

How β-Cyclodextrin-Functionalized Biochar Enhanced Biodenitrification in Low C/N Conditions via Regulating Substrate Metabolism and Electron Utilization

“…FTIR and XPS spectra were collected to reveal the variation of the functional group constituents . BC had several distinct absorption peaks, at around 3428 cm –1 , 1624 cm –1 , and 1071 cm –1 (Figure d), which were attributed to the adsorbed −OH stretching vibration, COO– stretching vibration, and C–O stretching vibration, respectively. , In BC@β-CD, peaks appeared at 2920 cm –1 and 1400–1200 cm –1 , arising from C–H stretching and deformation vibrations, which arose by the β-CD grafting process . Two distinct peaks, which are attributed to C 1s (284.7 eV) and O 1s (532.7 eV), were observed in the XPS full spectrum (Figure S3).…”

“…26,27 In BC@β-CD, peaks appeared at 2920 cm −1 and 1400−1200 cm −1 , arising from C−H stretching and deformation vibrations, which arose by the β-CD grafting process. 14 Two distinct peaks, which are attributed to C 1s (284.7 eV) and O 1s (532.7 eV), were observed in the XPS full spectrum (Figure S3). The intensity of the O 1s peak for BC@β-CD was higher than that of the BC samples, reflecting that the β-CD grafting process added many oxygen-containing chemical bonds.…”

“…Many bifunctional linkers (e.g., tetrahydrofuran, tetrafluoroterephthalonitrile, and ethylenediaminetetraacetic acid) have been used for the preparation of β-CD polymers. − Nevertheless, the major disadvantages of polymerization are the complex synthesis process and environmental risk of the chemical linkers. Compared with polymerization, grafting β-CD onto the surface of insoluble support, such as zeolite, biochar, or cellulose, is a more convenient and safer approach. − Among the support candidates for grafting, biochar contains redox-active components, which have been widely reported to improve denitrification performance and mitigate nitrous oxide emissions . Investigations of β-CD-functionalized biochar mostly focused on its outstanding adsorption capacity, but its contribution to denitrification is still unknown.…”