4-2. IROAST Seminars
No.
(invitation
ProgramNo.)

4-2-1(3-1-3)4-2-2(3-1-4)

4-2-3(3-1-5)4-2-4(3-1-6)

4-2-5(3-1-7)

4-2-6(3-1-8)4-2-7(3-1-9)Title

IROAST Speaker

Date

Organizer

The 84th IROAST Seminar- Computer vision and its applications in the New
Zealand blue economy

Patrice DELMASThe University of Auckland

December 7, 2022

Toshifumi MUKUNOKIFASTThe 85th IROAST Seminar- Operando investigations of gas sensing withsemiconducting metal oxides

Nicolae BARSAN
University of Tubingen

October 13, 2022

Tetsuya KIDAFASTThe 86th IROAST Seminar- A-Z of Biorefinery: A Promising Approach
Towards Sustainable Bio-Circular-Green
Economy Development

Suttichai ASSABUMRUNGRAT
Chulalongkorn University

October 28, 2022

Tetsuya KIDAFASTThe 87th IROAST Seminar- Workshop on the fundamentals of grainboundary phenomena

Pavel LEJčEK
Institute of Physics, Academy of
Sciences of Czech Republic

November 1, 2022

Sadahiro TSUREKAWA
FAST

The 88th IROAST Seminar- Historical-ecology of the COVID pandemicThe 89th IROAST Seminar- The international impact of Japanese nutritional
science and policy (1920-1945)-

Josep Lluís BARONA-VILAR
University of Valencia

88th: November 29, 2022
89th: December 2, 2022

Makoto TAKAFUJI
FAST

The 90th IROAST Seminar- The 3D Modular Building Connections(3DMBC) project

Konstantinos Daniel
TSAVDARIDIS
City, University of London

February 2, 2023

Gaochuang CAIIROASTThe 91st IROAST Seminar-From Metal-Metal Multiple Bonds to Helical
Metal Strings

Shie-Ming PENG
National Taiwan University

February 14, 2023

Shinya HAYAMI
FAST

4-2-8(3-1-10)4-2-9(3-1-11)

The 92nd IROAST Seminar
Olivier BOUTIN
Subcritical water for waste treatment and biomass
Aix-Marseille University
valorisation
February 17, 2023

Mitsuru SASAKIIINa

The 93rd IROAST Seminar
Metal oxide nanostructures as building blocks forenergy and environmental application

Dario ZAPPAThe University of Brescia

March 1, 2023

Tetsuya KIDA
FAST

FAST: Faculty of Advanced Science and Technology
IINa: Institute of Industrial Nanomaterial

IROAST Seminar & Research Activity Report by IROAST Visiting (Associate) Professor Invitation
No.3-1-3(Invitation Program)
No.4-2-1(Seminar)

Name

Patrice DELMAS

Title

Affiliation

The University of Auckland, Australia

NameToshifumi MUKUNOKI

Affiliation

Faculty of Advanced Science and Technology（FAST）

Title

Associate Professor

Professor

Host Faculty

Seminar Title
Venue
Time & Date

84th IROAST SeminarComputer vision and its applications in the New Zealand blue economy
100th Anniversary Hall, Kumamoto University

15:25-16:05, December 7, 2022

Speaker’s Name/
Title/Affiliation

Patrice DELMAS, Associate Professor,
Department of Computer Science, The University of Auckland, NZ

Number ofParticipants

Total: 25 in person and 36 online(Int’l participants: 24 )Invitees: 18(Int’l participants: 9 )Duration of Visit

From December 2, 2022- December 8, 2022

The 9th international workshop on X-Earth called as IWX2022 was held on Dec.6-7th. This workshop has
been continued since 2010 and the researchers using X-ray CT have gathered at Kumamoto University.
Even if the research background is different from each other, they can discuss and share the knowledge of“Image analysis”. Dr. Delmas is the specialist of Computer vision so he has been invited since 2016 toIWX.
Dr. Delmas gave his lecture at the IROAST session on Dec.7. He has a large UAV which can load threedifferent types of cameras and scan on the surface of estuary in Auckland. He has contributed to marine
science by taking photo from UAV and analyze the surface condition using hyperspectral camera. He gave
us the impact of the effectiveness using computer vision to the audience.
Advanced Concepts for Intelligent Vision systems (ACIVS) 2023 will be held on Kumamoto (KKR
hotel) from Aug. 21 to 24th. Dr. Delmas is a keyperson of this conference and Dr. Mukunoki and Dr. Otani
have been invited as scientific committee members already. During this conference, Dr. Delmas and Dr.
Mukunoki will organize the IROAST session and collect some paper. Excellent paper will be upgraded tothe journal paper.

Opening Remarks
Professor Hisao Ogawa,President of Kumamoto University

University Introduction
Professor Toshifumi Mukunoki,
Head of X-Earth Center

Associate Professor, Patrice Delmas, IROAST Visiting Professor, The University of Auckland

Professor Jun Otani,
Vice President of Kumamoto University

At venue

-Activities report with visiting (associate) professorThe purpose of his visiting was not to perform research concretely but give his lecture so there is noachievement in this visiting. Just. Dr. Delmas discussed future with Dr. Mukunoki clearly.
Dr. Delmas and Dr. Mukunoki will start new research topic for “Blue carbon” in Carbon Neutral Project.
Already, Dr. Mukunoki take sample from the estuary and scan the soil to visualize the pore structure. On
the other hand, Dr. Delmas has scan the estuary by the hyperspectral camera in Auckland and he discover
the potential of Blue carbon project

Fig. 1 Nano-focused CT image of mud soil.
Photo. UAV during the scanning mud soil at Auckland

IROAST Seminar & Research Activity Report by IROAST Visiting (Associate) Professor Invitation
No.3-1-4(Invitation Program)
No.4-2-2(Seminar)

Name

Nicolae BARSAN

Title

Affiliation

The Institute of Physical and Theoretical Chemistry,
University of Tubingen, Germany

Name

Tetsuya KIDA

Affiliation

Faculty of Advanced Science and Technology (FAST)

Title

Senior Researcher

Professor

Host Faculty

Seminar Title
Style
Time & Date
Speaker’s Name/
Title/Affiliation
Number ofParticipants
Duration of Visit

The 85th IROAST Seminar-Operando investigations of gas sensing with semiconducting metal oxides
Kurokami South W4 (Faculty of Engineering Research Bldg. II) 2F
Conference Room
16:00-17:00, October 13, 2022
Nicolae BARSAN Senior Researcher, The Institute of Physical andTheoretical Chemistry, University of Tubingen, Germany
Total:

34
Invitees:(Int’l participants: 8 )5(Int’l participants:

2 )From October 13, 2022- October 19, 2022

In the seminar, Dr. Barsan spoke about gas sensing with semiconductor metal oxide-based devices,
explaining that the operando approach has proven to be very effective in understanding gas sensing
mechanisms. The talk included examples of the use of two of the most successful methods including
Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and Kelvin probe work
function change measurements. In both cases, the DC resistance of the sensor was measured
simultaneously. The analysis covered the effect of water vapor on the conduction and receptionfunctions of SnO2-based sensors and the surface reaction of WO3-based gas sensors when exposed toethanol and acetone.
This seminar and lecture broadened the perspectives of the participating researchers and students on
the science and technology of gas sensing using semiconductor materials. Before and after the seminar,
the possibility of future collaborative research and international joint publications were also discussed.
Plans to exchange students were also agreed upon. The host professor plans to send an assistantprofessor, one post-doctoral fellow, and two graduate students to Tubingen for joint research.

Dr. Nicolae Barsan,

IROAST Seminar & Research Activity Report by IROAST Visiting (Associate) Professor Invitation
No.3-1-5(Invitation Program)
No.4-2-3(Seminar)

Name

Suttichai ASSABUMRUNGRAT

Title

Affiliation

Chulalongkorn University, Thailand

Name

Tetsuya KIDA

Affiliation

Faculty of Advanced Science and Technology (FAST)

Title

Professor

Professor

Host Faculty

Seminar Title

86th IROAST Seminar- A-Z of Biorefinery: A Promising Approach Towards
Sustainable Bio-Circular-Green Economy Development

Style

Hybrid (via Zoom and on-site)
Kurokami North E6: College of Cross-Cultural and Multidisciplinary Studies(Center for International Education) Room 1A

Time & Date

Speaker’s Name/
Title/Affiliation

Number ofParticipants
Duration of Visit

13:00-14:30, October 28, 2022
Suttichai ASSABUMNGRAT, Professor,
Center of Excellence in Catalysis and Catalytic Reaction Engineering,
Department of Chemical Engineering, Faculty of Engineering, Biorefinery
Cluster,
Bio-Circular-Green economy Technology & Engineering Center, Departmentof Chemical Engineering, Faculty of Engineering,
Chulalongkorn University, Thailand
Total:

70
Invitees:(Int’l participants: 46
1)(Int’l participants: 1 )From October 24,2022-October 28, 2022

The seminar given by Prof. Suttichai Assabumrungrat focused on the concept of biorefinery tosupport the Bio-Circular-Green Economy development and the United Nation’s Sustainable
Development Goals (SDGs). Some key important topics were addressed including overviews ofbiorefinery, biomass and biobased products, conversion of biomass to high-value products, downstream
recovery and separation, process creation, design and analysis, and case studies.
This seminar has broadened the knowledge of participating researchers and students (both online andon-site) on many aspects of “biorefinery”. Activities other than the seminar were as follows:
1. Discussion on the revision of our joint research paper titled “In-situ Transesterification of
Microalgae using Carbon-Based Catalyst under Pulsed Microwave Irradiation”, which has been
recently accepted for publication in a reputable journal in this field – “Biomass and Bioenergy”.
2. Updates on our on-going e-ASIA Project on Algal Biomass (SICORP-funded research project), andfollow-up on future joint research applications (JSPS Bilateral Joint Research Project/SATREPS).
3. Strengthening future collaboration on research and academic exchanges was also discussed. For
this purpose, 2 professors, 1 assistant professor, 1 post-doctoral fellow and 10 students (partly fundedby JASSO) will go to Thailand for academic, cultural and research exchanges this academic year 2022.

Opening: Prof. Armando T. Quitain

Group Photo

Professor Suttichai Assabumrungrat

IROAST Seminar & Research Activity Report by IROAST Visiting (Associate) Professor Invitation
No.3-1-6(Invitation Program)
No.4-2-4(Seminar)

Name

Pavel LEJčEK

Affiliation

Institute of Physics, Academy of Sciences of Czech RepublicName

Sadahiro TSUREKAWA

Affiliation

Faculty of Advanced Science and Technology (FAST)

Title

Title

Professor

Professor

Host Faculty

Seminar Title
Style
Time & Date

Speaker’s Name/
Title/Affiliation

Number ofParticipants
Duration of Visit

The 87th IROAST Seminar ~Workshop on the fundamentals of grainboundary phenomena~
Hybrid via Zoom and on site; Kurokami South C8 Room222
13:30-16:30, November 1, 2022
Pavel Lejček, Professor, IROAST Visiting Professor
Institute of Physics, Academy of Sciences of Czech Republic
Takahito Ohmura, Dr., Vice President of Research Center for Structural
Materials (RCSM)
National Institute for Materials Science (NIMS)
Yukio Sato, Associate Professor,
Department of Materials, Kyushu University
Dmitri, A. Molodov, Professor, IROAST Distinguished Professor,
RWTH Aachen University, Germany
Total:

50
Invitees:(Int’l participants:
4

12 )(Int’l participants: 2 )From October 30, 2022-November 11, 2022

ReportDuring my stay at Kumamoto University, I participated at the above-mentioned meeting organized byprof. Sadahiro Tsurekawa under the auspices of IROAST and other organization. At thisworkshop I presented the results of my very recent research concerning the role of entropy ingrain boundary segregation, mainly for the cases in which the entropy plays either the dominantrole or even when it completely controls (drives) the segregation of the solutes. On the other hand, I
became familiar with the recent results obtained at another laboratories of Kyushu University, NIMS
and RWTH in Aachen/Germany.
According to my meaning, the seminar brought (according to my feeling) two important items. First,
the participation of the students in the auditorium enabled them to become familiar with the top
research at different laboratories. Based on our contributions and discussion, we arranged a plan of a
joint collaboration in future involving the student exchange, mainly a stay of a Japanese student at ourlaboratory in Prague next year (if she will be selected for a trip to Europe). Second, the discussion withparticipants of the resulted in new ideas and we started a collaboration in the field of the entropy-driven
grain boundary segregation which is a newly suggested phenomenon which needs urgently an
experimental proof. We suppose that obtained experimental results supporting this suggestion would
represent top results which will be competitive for publication in top scientific journals and bring a newunderstanding of the topic of grain boundary segregation.
Activities report with visiting (associate) professor

Besides the above-mentioned workshop, I got the possibility to discuss actual topics of diploma theseswith students in the laboratory of prof. Tsurekawa. Many of these topics are very close to my interests
and we could discuss a lot with the students. It is only pity that the students have some troubles in
discussing in English. Nevertheless, we found a joint topic – study of the properties of so-called
high-entropy alloys – which has been recently started at our laboratories. In this respect we did prepare
samples for joint experiments and expect further close cooperation of our laboratories. This
cooperation will be very welcome as we can share materials and use complementary techniques forinvestigation. Because my stay at the Kumamoto University was rather short (2 weeks), no joint
experiments were performed during this time. In any case, I am very enthusiastic by the intensified
cooperation and believe in its success in near future.

Opening; Prof. Sadahiro Tsurekawa

Prof. Pavel Lejček

Dr. Takahito Ohmura

Assoc. Prof. Yukio Sato

Prof. Dmitri, A. Molodov

Group PhotoIROAST Seminar & Research Activity Report by IROAST Visiting (Associate) Professor Invitation
No.3-1-7(Invitation Program)
No.4-2-5(Seminar)

Name

Josep Lluís BARONA-VILAR

Title

Professor

Affiliation

University of Valencia, Spain

Name

Makoto TAKAFUJI

Title

Professor

Affiliation

Faculty of Advanced Science and Technology (FAST)

Host Faculty

Seminar Title

Venue
Time & Date
Speaker’s Name/
Title/Affiliation
Number ofParticipants
Duration of Visit

88th IROAST Seminar- Historical-ecology of the COVID pandemic89th IROAST Seminar- The international impact of Japanese nutritional science and policy(1920-1945)203 Lecture room, Academic Commons Kurokami Bldg. 1

15:00-16:00, November 29, 2022
11:00-12:00, December 2, 2022
Josep Lluís BARONA-VILAR, Professor,
University of Valencia, Spain

Total:

41(Int’l participants: 14 )Invitees: 1(Int’l participants: 1 )November 25, 2022- December 5, 2022

Prof Josep BARONA spoke on 'Historical-ecology of the COVID pandemic' and 'The international
impact of Japanese nutritional science and policy (1920-1945)'. The first lecture was on the'Historical-ecology of the COVID pandemic'.
In his first lecture, the professor gave a historical perspective on the plagues that have affected mankind
since ancient times. He discussed the environmental, biological and social factors involved in historical
pandemics in relation to time, living conditions, medicine and healthcare systems, and proposed the useof historical experience in analyzing and understanding current scientific, medical and technologicalissues.
In the second lecture, the professor introduced the Imperial Government Institute of Nutrition (IGIN,
1920), founded by Dr Masasuke Saiki in 1920, during a period of crisis characterized by war, famine,
economic recession and global instability in the first half of the twentieth century. The international
leadership and nutritional ideas of Dr Masuo Saiki, the important scientific and political role of IGIN,
and the global network of scientific and diplomatic relations were presented.
1. Seminar Outcomes and Future Plan (e.g. about contribution to the development of young
researchers and the initiation of international collaborative research aiming for the publication ofinternational collaborative papers, etc.)
So far, members of Kumamoto University have collaborated with a research group at the Universityof Valencia on the chiroptic properties of supramolecular assemblies, with good results. We discussed
ways to extend these results and promote new collaborations. We also discussed future researchexchanges and the exchange of young researchers, including postgraduate students.

88th seminar

Opening talk by Prof. TakafujiProfessor Barona

At venue
89th seminar

Opening talk by Prof. TakafujiProfessor BaronaAt venue

Group photo

2.Research achievements during his/her stay in Kumamoto University.
Prof. Josep BARONA has many discussions on research with young researchers during his stay at
Kumamoto University. Multilateral discussions on research with visiting Lithuanian, Bangladeshi andKyrgyz professors and researchers were also held during his stay.
3. Prospect for further research collaboration.
New joint research project was proposed and discussions were to continue towards obtaining researchfunding between the two organizations.

IROAST Seminar & Research Activity Report by IROAST Visiting (Associate) Professor Invitation
No. 3-1-8(Invitation Program)
No. 4-2-6(Seminar)

Name

Konstantinos Daniel TSAVDARIDIS

Affiliation

City, University of London, UK

Name

Gaochuang CAI

Affiliation

IROAST

Title

Professor

Title

Associate Professor

Host Faculty

Seminar Title
Venue
Time & Date
Speaker’s Name/
Title/Affiliation
Number ofParticipants
Duration of Visit

90th IROAST Seminar
The 3D Modular Building Connections(3DMBC) project
Kurokami South C4 (Academic Commons Kurokami Bldg. 2) 2F Room204

10:50-12:10, February 2, 2023
Konstantinos Daniel Tsavdaridis, Professor,
City, University of London, UK

Total:

17(Int’l participants: 9 )Invitees: 1(Int’l participants: 1 )January 29, 2023-February 3, 2023

-Seminar report 1. Seminar Overview
The purpose of this seminar is to understand Professor Tsavdaridis's research on modular housing,
especially the safety performance and countermeasures of the joints in the buildings, and based on this,to deeply discuss the research progress of housing and the possibility of implementation in Japan, as wellas two research groups future research direction.
2. Seminar Outcomes and Future Plan (e.g. about contribution to the development of young researchers
and the initiation of international collaborative research aiming for the publication of international
collaborative papers, etc.)-Seminar Outcomes
Based on this workshop, we will develop a new way of cooperation, including joint experimental
analysis, remote mentoring of young PhDs and researchers, and at least one Ph.D. visit per year.
-Application of funding supports
JSPS-visiting researcher program
JST-SATREPS project
Kajima Foundation -Support Program for International Joint Research Activities(https://www.kajima-f.or.jp/en/)- Publication of international collaborative papers(1)
G. Cai*, Y. Wen, T. Fujinaga, K. D. Tsavdaridis, A. Si Larbi. Cyclic behavior and FE analysis of
RCFT columns under simulated seismic loads, Structures (IF: 4.010), will be submitted by May 2023
(2)
G. Cai*, Y. Wen, T. Fujinaga, K.D. Tsavdaridis, A. Si Larbi. Cyclic behavior and FE analysis of
RCFT columns under simulated seismic loads, Journal of Building Engineering (IF: 6.4), will be
submitted by July 2023
Two papers are under perparation.

Prof. Konstantinos

Q&A, Discussion

At venueGroup photo-Activities report with visiting (associate) professor-Host a symposium at Kumamoto University with Dr. Cai.
We hosted an international symposium during his stay at Kumamoto. The details are available on the
IROAST website.
-Discussion on collaboration, including publication, and funding application.
We have discussed the details of the main collaboration topics, collaboration methods, etc.
-Offering an IROAST seminar
Professor TSAVDARIDIS offered a lecture entitled "The 3D Modular Building Connections (3DMBC)
project and discussed it with the students.
-Visiting the structural lab at Kumamoto University for discussing the future research plan.
Professor TSAVDARIDIS visited the research lab. with another visitor with Dr. Cai for discussing thepossibility of new research topics in the future.
3. Research achievements during his/her stay in Kumamoto University.
-Publication
Q. Su, G. Cai*, M. Hani, A. Si Larbi, K. D. Tsavdaridis. (2023) Damage control of the masonry infills in RC
frames under cyclic loads: A full-scale test study and numerical analyses, Bulletin of Earthquake Engineering,21, 1017–1045. (IF*4.556, Q1)-Research exchange
A Ph.D. student will visit CITY next year
4. Prospect for further research collaboration.
-Funding application
Prepare a proposal for the following programs,
JST-SATREPS project-Publication
More than 2 papers are under preparation with the professor-Visiting exchange
Dr. Cai will visit the professor’s university for having lectures, test collaboration, and seminar

IROAST Seminar & Research Activity Report by IROAST Visiting (Associate) Professor Invitation
No. 3-1-9(Invitation Program)
No. 4-2-7(Seminar)

Name

Shie-Ming PENG

Title

Affiliation

National Taiwan University, Taiwan

Name

Shinya HAYAMI

Affiliation

Faculty of Advanced Science and Technology （FAST）

Title

Professor

Professor

Host Faculty

Seminar Title
Style
Time & Date
Speaker’s Name/
Title/Affiliation
Number of Participants
Duration of Visit

91st IROAST Seminar
From Metal-Metal Multiple Bonds to Helical Metal Strings
Online: Zoom
Venue: Kurokami South E1 (Faculty of Science Bldg. 1 & 2) 2F C226
14:30-16:00, February 14, 2023
Shie-Ming Peng, Professor, IROAST Visiting Professor
National Taiwan University, Taiwan
Total:

35(Int’l participants: 7 )Invitees: 1(Int’l participants: 1 )From February 10, 2023- March 11, 2023

1. Seminar Overview
In this seminar, the invited speaker Shie-Ming Peng gave a lecture about the recent advance incoordination chemistry, especially, the metal-metal multiple bonds to form helical metal strings. The
metal-metal bonding complexes have fundamental features such as structures, spin, and electricalconductivity. Furthermore, the historic and future outlook of this field was demonstrated.
2. Seminar Outcomes and Future Plan
After his lecture, young researchers and students asked many questions and comments to Prof. Peng.
For example, the details method to control the metal ion kinds and the number of difficulties in thesynthetic procedure are essential for their experiments and studies. Furthermore, one researcher hadinterested in his compound for detailed magnetic investigations. This seminar was a good
opportunity to start international collaboration.

Opening

Q&A

Prof. Shie-Ming Peng

Group Photo

3.Research achievements during his/her stay in Kumamoto University.
Prof. Peng demonstrated and taught the detailed experimental method and characterization process formaking various coordination metal complexes possessing interesting metal-metal bonding. The
Kumamoto univ students start the synthesis of related coordination metal complexes.
4. Prospect for further research collaboration.
His coordination metal complexes have the potential to exhibit quantum magnetism. Our group has one
project to demonstrate such research, therefore we can do a collaboration with visiting professor.

IROAST Seminar & Research Activity Report by IROAST Visiting (Associate) Professor Invitation
No. 3-1-10(Invitation Program)
No. 4-2-8(Seminar)

Name

Olivier BOUTIN

Title

Affiliation

Aix-Marseille University, France

Name

Mitsuru SASAKI

Affiliation

Institute of Industrial Nanomaterials （IINa）

Title

Professor

Associate Professor

Host Faculty

Seminar Title

92nd IROAST Seminar
Subcritical water for waste treatment and biomass valorisation

Style

Venue: International Seminar Room, 2F
Kurokami South W4 (Faculty of Engineering Research Bldg. II)Time & Date
Speaker’s Name/
Title/Affiliation
Number ofParticipants
Duration of Visit

14:00-15:00, February 17, 2023
Olivier Boutin, Professor, IROAST Visiting Professor
Aix-Marseille University, France
Total:

9(Int’l participants:

Invitees: 1(Int’l participants: 1)

2)

From February 10, 2023-February 20, 2023

1. Seminar Overview
The proposed seminar included 45 slides, for a presentation duration of 50 minutes.
The first part presents the University of Aix Marseille, the courses and the laboratory. M2P2 in which I
work. This first part is also an opportunity to explain to the students present in the room thepossibilities of exchange with the University of Aix Marseille, for semesters of courses or for periodsof internship, in particular at the M2P2 laboratory.
In the second part, I wanted to address all the important elements for the understanding of thephenomena in subcritical and supercritical water, and the reasons why it is interesting and relevant todevelop processes in these conditions.
The third and last part of this presentation first of all presents in a general way the different
possibilities of implementing these processes for the treatment of organic matter, whether biomass or
waste. The main difference lies in the presence or absence of an oxidant, and of course whether the
fluid system is single-phase or two-phase. To illustrate these aspects, three examples from my latest
research are proposed.
In conclusion, these different processes are highlighted in the context of the energy and ecologicaltransition.
2. Seminar Outcomes and Future Plan (e.g. about contribution to the development of young
researchers and the initiation of international collaborative research aiming for the publication ofinternational collaborative papers, etc.)
As explained above, this seminar was an opportunity to show the possibilities of exchange with the
University of Aix Marseille. Students are often reluctant to go abroad, in Europe, and I therefore
emphasised the possibilities and the welcome provided by the University of Aix Marseille. On the other
hand, on the research part, all the elements were provided, in particular on wet oxidation, allowing to
put in perspective the research work which is currently carried out with Dr Sasaki.

Opening

Prof. Boutin

Q&AGroup Photo3.Research achievements during his/her stay in Kumamoto University.
Despite the existence of wastewater treatment plants, many molecules can be released in trace
amounts into the environment. Even at low or very low concentrations, some of these molecules stillpose a risk to the environment in general and to humans in particular. Thus, traces of various pollutants
such as industrial compounds, personal care products or endocrine disruptors are found in water atconcentrations in the μg L-1 or ng L-1 range. Traces can also be found in drinking water, which has adirect impact on human beings. However, several studies indicate that the levels of endocrine
disruptors in wastewater decrease after conventional biological treatment, mainly by simple adsorption
onto activated sludge, which may then pose the problem of sludge management. Of all the compounds,
this study focuses on the fate of bisphenol A. Bisphenol A (2,2-bis(4-hydroxyphenyl) propane; BPA) is
used as a chemical intermediate in the manufacture of chemicals, such as polycarbonates, epoxy resinsfor can coating, powder coatings, adhesives, building materials and paper coatings. Bisphenol A is thus
released into the environment through leaching from plastic waste and landfill leachate. It is acutely
toxic at concentrations between 1 and 10 mg L-1 for marine species, as an endocrine disruptor causing
various diseases, including cancer.
The objective of the work is to compare the treatment of BPA through wet air oxidation treatment andpulsed discharge treatment. Here are presented results on wet air oxidation.
Synthetic observation from bibliographical research
Pub1 CWAO with materials based on activated carbon, CeO2, TiO2, MnO2, ZrO2, and theirmixed oxides, which have been tested in the CWAO of phenol
100°C, air 20 bar, 10 mg/L

Pub2 Catalytic wet air oxidation of bisphenol A model solution in a trickle-bed reactor overtitanate nanotube-based catalysts
Catalyse protonated titanate nanotubes
10 mg/L
10 bar 200°C
Residual BPA content :HPLC apparatus (Spectra systemTM), isocratic analytical mode, 100 mm×4.6 mm BDS Hypersil C18
2.4 m column thermostated at 30 ◦C (UV detection at = 210 nm with a mobile phase of methanol (70%)
and ultrapure water (30%) at a flow rate of 0.5 mL min−1).
Perkin-Elmer (model Lambda 45) UV-Vis spectrophotometer for the residual concentrations of BPA in
the aqueous-phase
Ion chromatography (IC) using DX-120 Dionex apparatus, in order to determine eventual CWAO
intermediates.
TOC content measurements were carried out with an advanced TOC analyzer (Teledyne Tekmar, model
Torch) equipped with a highpressure NDIR detector. A high-temperature catalytic oxidation (HTCO)
method was applied (at 750◦C), which subtracted the measured inorganic carbon (IC) content frommeasured total carbon (TC) content.

Results obtained with no catalysts

Pub3 Magnetic titanium/carbon nanotube nanocomposite catalyst for oxidative degradation of
Bisphenol A from high saline polycarbonate plant effluent using catalytic wet peroxide oxidation.
Quantitative information’s in this publication

The concentration of BPA was analyzed by (HPLC, KNAUER, Germany), 2500 ultraviolet (UV)
wavelength detector and a C18 (100–5) column (4.6mm×250 mm, with 5 μm particle size) as
stationary phase, maintained at 35 °C in the oven. The UV detection wavelength for BPA was 214 nm.
The mobile phase in an isocratic method was a mixture of Millipore water/acetonitrile with a 50:50
ratio at the flow rate of 1 mL min-1. 100 μL sample was filtered by Cellulose Acetate (CA) syringe
filter (0.22 μm). retention time for BPA was 8.5 min. limit of detection was 0.01 mg L-1 and the limitof quantification was 0.1 mg L-1.
Agilent 7890 gas chromatograph with a 5975 single quadrupole mass spectrometer (Agilent,USA)(GC–MS analysis). HP-5MS capillary column (30m×0.25mm×0.25 μm, film thickness; Agilent, USA,
5% phenyl −95% Methyl Siloxane phase). splitting ratio of 10:1 in splitless mode at 280°C. carrier gas(Helium) constant flow rate of 1 mL/min. an initial temperature of 40°C (held for 1 min) was ramped at
5 °C/min to 300°C and held for 5 min. Post–run was3 min. Total GC–MS runtime was 56 min. The
mass spectrometer was operated at EI mode at 70 eV. Selected compounds were identified by selected
ion monitoring (SIM mode). Data was processed using MSD Chemstation-qualitative analysis software(Agilent Technologies).
Initial 600 mg L-1

Pub4 Degradation of bisphenol A by electrocatalytic wet air oxidation process: Kinetic modeling,degradation pathway and performance assessment
HPLC, TOC, COD, BOD, GC-MS
The toxic effects of PPCPs and their degradation products evaluated by the inhibition growth ofbacterium Escherichia coli in Luria-Bertani (LB) medium.
ThanPub5 Catalytic wet air oxidation of bisphenol A aqueous solution in trickle-bed reactor oversingle TiO2 polymorphs and their mixtures
Not interested
Pub6 Efficient removal of bisphenol A from wastewaters: Catalytic wet air oxidation with Pt
catalysts supported on Ce and Ce–Ti mixed oxides
HPLC, TOC, UPLC-MS (ultra performance liquide chromatography)
160°C, 2 MPa / dans ces conditions, pas de dégradation thermique après 3h

B et C are isomers moleculesA:(same as previous publication)

B:
C1 :Pub7 Preparation of Granulated Biomass Carbon Catalysts—Structure
Characterization, and Use in CatalyticWet Air Oxidation of Bisphenol A
HPLC with photo diode array detector

Tailoring,Pub8 Insights into the Kinetics Degradation of Bisphenol A byCatalyticWet Air Oxidation with
Metals Supported onto Carbon Nanospheres

BPA oxidation mechanism
Oxidation2

Oxidation3

Oxidation5

Experiments through WAO made at Aix Marseille University
Prepare a 1L solution at 100 mg per litre. Wear a protective mask.
Make a TOC measurement on this initial solution.
For all tests, note the times (rise, fall, etc.), temperatures and pressures. Stir at 700 rpm for all tests.
Each test starts with 100 mL of solution, atmospheric pressure, inerted with nitrogen. After each test,
make a TOC measurement and store the rest in the refrigerator.
Test 1: heat to 300°C, then cool (no oxidation).
For the following tests, with oxidation, increase the temperature, note the pressure, and complete with
air to reach 150 bar. Leave for the duration of the stage and then cool down.
Test 2: 200°C, 30 min
Test 3: 250°C, 30 min
Test 4: 300°C, 30 min
Test 5: 300°C, 60 min
Test 6: 300°C, 30 min, with an initial sample diluted 1 time (50mL solution°50mL water)
Results obtained through HPLC measurements made at Kumamoto University
Analyses HPLC InertSustain C18
35°C
Detector Jasco MD-4017 Photo Diode Array Detector (200-400 nm)
1 mL/min
Acetone/distilled water 1 :1
20 L
200 nmFor hydroquinone, benzoquinone …

Results on pure hydroquinone
0.25 mM retention time 3.66 min, area 213881651

0.5 mM retention time 3.66 min, area 245561785

1 mM retention time 3.66 min, area 265201658

Calibration curve for hydroquinone

HPLC results for WAO experiments
Test 1

Test2

Test3

Test4

Test5

Test 6

4. Prospect for further research collaboration.
For further work, we need to calibrate and evaluate the different analysis through LC-MS proposed by
Dr Sasaki.
I will have the final results from COT measurements.
After that, we need the results from pulsed discharge experiments to start the comparison between bothprocesses.

IROAST Seminar & Research Activity Report by IROAST Visiting (Associate) Professor Invitation
No.3-1-11(Invitation Program)
No.4-2-9(Seminar)

Name

Dario ZAPPA

Title

Affiliation

The University of Brescia, Italy

Name

Tetsuya KIDA

Affiliation

Faculty of Advanced Scient and Technology (FAST)

Title

Associate Professor

Professor

Host Faculty
93rd IROAST Seminar
Metal oxide nanostructures as building blocks for energy and environmental
application
Kurokami South W4(Faculty of Engineering Research Bldg. II) 2F Conference Room

Seminar Title
Venue
Time & Date

16:00-17:00, March 1, 2023

Speaker’s Name/
Title/Affiliation

Dario Zappa, Associate Professor,
The University of Brescia, Italy
Total:

Number ofParticipants

31
Invitees: 1

Duration of Visit(Int’l participants:

16 )(Int’l participants: 1 )From February 28, 2023- March 6, 2023

1. Seminar Overview
In the seminar, Prof. Dario Zappa talked about the synthesis of one-dimensional nanomaterials andtheir applications in the energy and environmental fields. He gave examples of metal oxide
nanostructures (nanowires, nanotubes, surface-functionalized nanowires, and heterostructures) and
explored their potential use as chemical sensors and for the production of solid oxide fuel cells. Various
growth and characterization techniques have proven effective in tailoring the properties of materials to
specific applications. In addition, several strategies for improving the sensitivity and selectivity ofmetal oxide chemosensors were discussed. The formation of p-n junctions between nanostructures
significantly improved device performance.
2. Seminar Outcomes and Future Plan
The seminar broadened the perspectives of the participating researchers and students on the scienceand technology of fuel cells and gas sensors using metal oxide nanowires. Before and after the seminar,
the possibility of future collaborative research and international joint publications were discussed.
Plans for student exchange programs were also agreed upon. The host professor plans to send two
graduate students to Brescia to conduct joint research.

Dr. Dario Zappa

Group Photo