Preparation of photocrosslinked spherical hydrogels bearing β-cyclodextrin and application in immobilizing microbes to decompose organic pollutants
A microbe-immobilized support that improves the ability of bacteria to decompose organic pollutants by utilizing the organic inclusion effect of cyclodextrin (CyD) has been developed. Spherical hydrogels (ENTG -co- PSβCyD) were prepared by photocopolymerization of the polyethylene glycol macromonome...
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Published in | Polymer journal Vol. 54; no. 7; pp. 863 - 873 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
London
Nature Publishing Group UK
01.07.2022
Nature Publishing Group |
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Abstract | A microbe-immobilized support that improves the ability of bacteria to decompose organic pollutants by utilizing the organic inclusion effect of cyclodextrin (CyD) has been developed. Spherical hydrogels (ENTG
-co-
PSβCyD) were prepared by photocopolymerization of the polyethylene glycol macromonomer, ENTG, and the polysubstituted photocross-linkable β-CyD macromonomer PSβCyD. Then, the optimum composition ratio for use of this hydrogel as a microbe-immobilized support was determined, as were the phenol (PhOH)-removing abilities of PhOH-decomposing bacteria immobilized on this hydrogel. PhOH-degrading bacteria were immobilized on the spherical ENTG-
co
-PSβCyD hydrogel to obtain a microbe-immobilized hydrogel. The best microbe-immobilized support was obtained by using a spherical hydrogel with a PSβCyD content of approximately 28 μmol g
−1
, and this resulted in a PhOH-removal rate of 0.76 mg (L h hydrogel g)
−1
. This removal rate was 1.7 times faster, and the amount of free bacteria in the assay medium was 3.6 times lower than the corresponding data obtained using a microbe-immobilized hydrogel without PSβCyD. The spherical ENTG-
co
-PSβCyD hydrogel had a diameter of 2.9 mm, a moisture content of 63 wt%, a specific gravity of 1.16 g cm
−3
and a Young’s modulus of 8.1 MPa. These results suggested that more efficient industrial wastewater treatment technologies must be developed.
Spherical hydrogels (ENTG
-co-
PSβCyD) were prepared by photocopolymerization of the polyethylene glycol macromonomer ENTG and the polysubstituted photocross-linkable β-cyclodextrin (β-CyD) macromonomer PSβCyD. The optimum composition ratio for use of this hydrogel as a microbe-immobilized support was examined, along with the phenol (PhOH)-removing capability of PhOH-decomposing bacteria immobilized on this hydrogel. The best microbe-immobilized support had a PhOH-removal rate of 0.76 mg (L h hydrogel g)
−1
. This removal rate was 1.7 times faster, and the amount of free bacteria in the assay medium was 3.6 times lower than the corresponding data obtained using a microbe-immobilized hydrogel without PSβCyD. |
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AbstractList | A microbe-immobilized support that improves the ability of bacteria to decompose organic pollutants by utilizing the organic inclusion effect of cyclodextrin (CyD) has been developed. Spherical hydrogels (ENTG-co-PSβCyD) were prepared by photocopolymerization of the polyethylene glycol macromonomer, ENTG, and the polysubstituted photocross-linkable β-CyD macromonomer PSβCyD. Then, the optimum composition ratio for use of this hydrogel as a microbe-immobilized support was determined, as were the phenol (PhOH)-removing abilities of PhOH-decomposing bacteria immobilized on this hydrogel. PhOH-degrading bacteria were immobilized on the spherical ENTG-co-PSβCyD hydrogel to obtain a microbe-immobilized hydrogel. The best microbe-immobilized support was obtained by using a spherical hydrogel with a PSβCyD content of approximately 28 μmol g−1, and this resulted in a PhOH-removal rate of 0.76 mg (L h hydrogel g)−1. This removal rate was 1.7 times faster, and the amount of free bacteria in the assay medium was 3.6 times lower than the corresponding data obtained using a microbe-immobilized hydrogel without PSβCyD. The spherical ENTG-co-PSβCyD hydrogel had a diameter of 2.9 mm, a moisture content of 63 wt%, a specific gravity of 1.16 g cm−3 and a Young’s modulus of 8.1 MPa. These results suggested that more efficient industrial wastewater treatment technologies must be developed.Spherical hydrogels (ENTG-co-PSβCyD) were prepared by photocopolymerization of the polyethylene glycol macromonomer ENTG and the polysubstituted photocross-linkable β-cyclodextrin (β-CyD) macromonomer PSβCyD. The optimum composition ratio for use of this hydrogel as a microbe-immobilized support was examined, along with the phenol (PhOH)-removing capability of PhOH-decomposing bacteria immobilized on this hydrogel. The best microbe-immobilized support had a PhOH-removal rate of 0.76 mg (L h hydrogel g)−1. This removal rate was 1.7 times faster, and the amount of free bacteria in the assay medium was 3.6 times lower than the corresponding data obtained using a microbe-immobilized hydrogel without PSβCyD. A microbe-immobilized support that improves the ability of bacteria to decompose organic pollutants by utilizing the organic inclusion effect of cyclodextrin (CyD) has been developed. Spherical hydrogels (ENTG -co- PSβCyD) were prepared by photocopolymerization of the polyethylene glycol macromonomer, ENTG, and the polysubstituted photocross-linkable β-CyD macromonomer PSβCyD. Then, the optimum composition ratio for use of this hydrogel as a microbe-immobilized support was determined, as were the phenol (PhOH)-removing abilities of PhOH-decomposing bacteria immobilized on this hydrogel. PhOH-degrading bacteria were immobilized on the spherical ENTG- co -PSβCyD hydrogel to obtain a microbe-immobilized hydrogel. The best microbe-immobilized support was obtained by using a spherical hydrogel with a PSβCyD content of approximately 28 μmol g −1 , and this resulted in a PhOH-removal rate of 0.76 mg (L h hydrogel g) −1 . This removal rate was 1.7 times faster, and the amount of free bacteria in the assay medium was 3.6 times lower than the corresponding data obtained using a microbe-immobilized hydrogel without PSβCyD. The spherical ENTG- co -PSβCyD hydrogel had a diameter of 2.9 mm, a moisture content of 63 wt%, a specific gravity of 1.16 g cm −3 and a Young’s modulus of 8.1 MPa. These results suggested that more efficient industrial wastewater treatment technologies must be developed. Spherical hydrogels (ENTG -co- PSβCyD) were prepared by photocopolymerization of the polyethylene glycol macromonomer ENTG and the polysubstituted photocross-linkable β-cyclodextrin (β-CyD) macromonomer PSβCyD. The optimum composition ratio for use of this hydrogel as a microbe-immobilized support was examined, along with the phenol (PhOH)-removing capability of PhOH-decomposing bacteria immobilized on this hydrogel. The best microbe-immobilized support had a PhOH-removal rate of 0.76 mg (L h hydrogel g) −1 . This removal rate was 1.7 times faster, and the amount of free bacteria in the assay medium was 3.6 times lower than the corresponding data obtained using a microbe-immobilized hydrogel without PSβCyD. |
Author | Fukunaga, Kimitoshi Yamasaki, Hirohito Nagasawa, Yasu-yuki |
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Cites_doi | 10.1016/0922-338X(93)90174-7 10.1271/bbb.58.995 10.1252/kakoronbunshu.35.20 10.1038/pj.2016.127 10.1002/(SICI)1097-4628(19990929)73:14<2903::AID-APP14>3.0.CO;2-2 10.4011/shikizai1937.63.153 |
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SubjectTerms | 639/638/455/958 704/172/169 Bacteria Biomaterials Bioorganic Chemistry Chemistry Chemistry and Materials Science Chemistry/Food Science Composition Cyclodextrins Decomposition Hydrogels Industrial wastes Microorganisms Modulus of elasticity Moisture content Moisture effects Original Article Phenols Pollutants Polyethylene glycol Polymer Sciences Specific gravity Surfaces and Interfaces Thin Films Wastewater treatment |
Title | Preparation of photocrosslinked spherical hydrogels bearing β-cyclodextrin and application in immobilizing microbes to decompose organic pollutants |
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