Tags

Type your tag names separated by a space and hit enter

Heterogeneous photodegradation of methylene blue with iron and tea or coffee polyphenols in aqueous solutions.
Water Sci Technol. 2016; 73(8):1872-81.WS

Abstract

Recently, we developed two new Fenton catalysts using iron (Fe) and spent tea leaves or coffee grounds as raw material. In this study, Fe-to-tea or Fe-to-coffee polyphenol complexes were successfully tested as heterogeneous photo-Fenton catalysts. The photodegradation efficiency of methylene blue solutions with Fe-to-polyphenol complexes was higher than that of homogeneous iron salts in the photo-Fenton process. Furthermore, the tested Fe-to-polyphenol complexes could be reused by simply adding H2O2 to the solutions. After three sequential additions of H2O2, the conventional catalysts FeCl2·4H2O and FeCl3 removed only 16.6% and 53.6% of the dye, while the catalysts made using spent coffee grounds and tea leaves removed 94.4% and 96.0% of the dye, respectively. These results showed that the complexes formed between Fe and chlorogenic acid, caffeic acid, gallic acid and catechin, which are the main polyphenols in tea and coffee, can be used to improve the photo-Fenton process.

Authors+Show Affiliations

National Agriculture and Food Research Organization, Postal 514-2392 Mie, Tsu, Ano, Kussawa 360, Japan E-mail: ckm@affrc.go.jp.National Agriculture and Food Research Organization, Postal 514-2392 Mie, Tsu, Ano, Kussawa 360, Japan E-mail: ckm@affrc.go.jp.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27120642

Citation

Morikawa, Claudio Kendi, and Makoto Shinohara. "Heterogeneous Photodegradation of Methylene Blue With Iron and Tea or Coffee Polyphenols in Aqueous Solutions." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 73, no. 8, 2016, pp. 1872-81.
Morikawa CK, Shinohara M. Heterogeneous photodegradation of methylene blue with iron and tea or coffee polyphenols in aqueous solutions. Water Sci Technol. 2016;73(8):1872-81.
Morikawa, C. K., & Shinohara, M. (2016). Heterogeneous photodegradation of methylene blue with iron and tea or coffee polyphenols in aqueous solutions. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 73(8), 1872-81. https://doi.org/10.2166/wst.2016.032
Morikawa CK, Shinohara M. Heterogeneous Photodegradation of Methylene Blue With Iron and Tea or Coffee Polyphenols in Aqueous Solutions. Water Sci Technol. 2016;73(8):1872-81. PubMed PMID: 27120642.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Heterogeneous photodegradation of methylene blue with iron and tea or coffee polyphenols in aqueous solutions. AU - Morikawa,Claudio Kendi, AU - Shinohara,Makoto, PY - 2016/4/28/entrez PY - 2016/4/28/pubmed PY - 2016/8/23/medline SP - 1872 EP - 81 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 73 IS - 8 N2 - Recently, we developed two new Fenton catalysts using iron (Fe) and spent tea leaves or coffee grounds as raw material. In this study, Fe-to-tea or Fe-to-coffee polyphenol complexes were successfully tested as heterogeneous photo-Fenton catalysts. The photodegradation efficiency of methylene blue solutions with Fe-to-polyphenol complexes was higher than that of homogeneous iron salts in the photo-Fenton process. Furthermore, the tested Fe-to-polyphenol complexes could be reused by simply adding H2O2 to the solutions. After three sequential additions of H2O2, the conventional catalysts FeCl2·4H2O and FeCl3 removed only 16.6% and 53.6% of the dye, while the catalysts made using spent coffee grounds and tea leaves removed 94.4% and 96.0% of the dye, respectively. These results showed that the complexes formed between Fe and chlorogenic acid, caffeic acid, gallic acid and catechin, which are the main polyphenols in tea and coffee, can be used to improve the photo-Fenton process. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/27120642/Heterogeneous_photodegradation_of_methylene_blue_with_iron_and_tea_or_coffee_polyphenols_in_aqueous_solutions_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2016.032 DB - PRIME DP - Unbound Medicine ER -