Adsorption of catechin in green-tea extracts onto NVP-grafted fiber and its elution with NaOH

Ryunosuke Kawamura; Shota Goto; Yuki Matsuura; Shigeko Kawai-Noma; Daisuke Umeno; Kyoichi Saito; Kunio Fujiwara; Takanobu Sugo; Yurika Yajima; Akiko Kinoshita; Azusa Kudo; Jumpei Hioki; Hideyuki Wakabayashi

doi:10.1252/kakoronbunshu.44.99

Adsorption of catechin in green-tea extracts onto NVP-grafted fiber and its elution with NaOH

Ryunosuke Kawamura, Shota Goto, Yuki Matsuura, Shigeko Kawai-Noma, Daisuke Umeno, Kyoichi Saito, Kunio Fujiwara, Takanobu Sugo, Yurika Yajima, Akiko Kinoshita, Azusa Kudo, Jumpei Hioki, Hideyuki Wakabayashi

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

For the removal of catechin from green-tea extracts, N-vinylpyrrolidone-grafted fiber was prepared by radiation-in-duced graft polymerization of N-vinylpyrrolidone (NVP) onto a commercially available 6-nylon fiber. The adsorption isotherm of the NVP fiber with a density of 3.9 mmol/g for catechin in green-tea extracts was well correlated by Lang-muir-type equation. The maximum adsorption capacity and adsorption constant were 0.23 mmol/g and 13 L/mmol, respectively. Catechin adsorbed onto the NVP fiber was eluted completely with 0.1 M NaOH. In the second to fourth cycles of adsorption and elution, the amount of catechin adsorbed onto the NVP fiber remained almost constant.

Original language	English
Pages (from-to)	99-102
Number of pages	4
Journal	kagaku kogaku ronbunshu
Volume	44
Issue number	2
DOIs	https://doi.org/10.1252/kakoronbunshu.44.99
Publication status	Published - 2018
Externally published	Yes

Keywords

Adsorption isotherm
Catechin
Green tea
N-vinylpyrrolidone
NVP-grafted fiber

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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title = "Adsorption of catechin in green-tea extracts onto NVP-grafted fiber and its elution with NaOH",

abstract = "For the removal of catechin from green-tea extracts, N-vinylpyrrolidone-grafted fiber was prepared by radiation-in-duced graft polymerization of N-vinylpyrrolidone (NVP) onto a commercially available 6-nylon fiber. The adsorption isotherm of the NVP fiber with a density of 3.9 mmol/g for catechin in green-tea extracts was well correlated by Lang-muir-type equation. The maximum adsorption capacity and adsorption constant were 0.23 mmol/g and 13 L/mmol, respectively. Catechin adsorbed onto the NVP fiber was eluted completely with 0.1 M NaOH. In the second to fourth cycles of adsorption and elution, the amount of catechin adsorbed onto the NVP fiber remained almost constant.",

keywords = "Adsorption isotherm, Catechin, Green tea, N-vinylpyrrolidone, NVP-grafted fiber",

author = "Ryunosuke Kawamura and Shota Goto and Yuki Matsuura and Shigeko Kawai-Noma and Daisuke Umeno and Kyoichi Saito and Kunio Fujiwara and Takanobu Sugo and Yurika Yajima and Akiko Kinoshita and Azusa Kudo and Jumpei Hioki and Hideyuki Wakabayashi",

note = "Publisher Copyright: {\textcopyright} 2018 The Society of Chemical Engineers, Japan.",

year = "2018",

doi = "10.1252/kakoronbunshu.44.99",

language = "English",

volume = "44",

pages = "99--102",

journal = "kagaku kogaku ronbunshu",

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publisher = "Society of Chemical Engineers, Japan",

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TY - JOUR

T1 - Adsorption of catechin in green-tea extracts onto NVP-grafted fiber and its elution with NaOH

AU - Kawamura, Ryunosuke

AU - Goto, Shota

AU - Matsuura, Yuki

AU - Kawai-Noma, Shigeko

AU - Umeno, Daisuke

AU - Saito, Kyoichi

AU - Fujiwara, Kunio

AU - Sugo, Takanobu

AU - Yajima, Yurika

AU - Kinoshita, Akiko

AU - Kudo, Azusa

AU - Hioki, Jumpei

AU - Wakabayashi, Hideyuki

PY - 2018

Y1 - 2018

N2 - For the removal of catechin from green-tea extracts, N-vinylpyrrolidone-grafted fiber was prepared by radiation-in-duced graft polymerization of N-vinylpyrrolidone (NVP) onto a commercially available 6-nylon fiber. The adsorption isotherm of the NVP fiber with a density of 3.9 mmol/g for catechin in green-tea extracts was well correlated by Lang-muir-type equation. The maximum adsorption capacity and adsorption constant were 0.23 mmol/g and 13 L/mmol, respectively. Catechin adsorbed onto the NVP fiber was eluted completely with 0.1 M NaOH. In the second to fourth cycles of adsorption and elution, the amount of catechin adsorbed onto the NVP fiber remained almost constant.

AB - For the removal of catechin from green-tea extracts, N-vinylpyrrolidone-grafted fiber was prepared by radiation-in-duced graft polymerization of N-vinylpyrrolidone (NVP) onto a commercially available 6-nylon fiber. The adsorption isotherm of the NVP fiber with a density of 3.9 mmol/g for catechin in green-tea extracts was well correlated by Lang-muir-type equation. The maximum adsorption capacity and adsorption constant were 0.23 mmol/g and 13 L/mmol, respectively. Catechin adsorbed onto the NVP fiber was eluted completely with 0.1 M NaOH. In the second to fourth cycles of adsorption and elution, the amount of catechin adsorbed onto the NVP fiber remained almost constant.

KW - Adsorption isotherm

KW - Catechin

KW - Green tea

KW - N-vinylpyrrolidone

KW - NVP-grafted fiber

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JO - kagaku kogaku ronbunshu

JF - kagaku kogaku ronbunshu

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ER -

Adsorption of catechin in green-tea extracts onto NVP-grafted fiber and its elution with NaOH

Abstract

Keywords

ASJC Scopus subject areas

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