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Researcher Information

last modified:2023/03/29

Assistant Professor Kuo Hong WONG

Mail Laboratory Website

Faculty, Affiliation

Faculty of Chemistry, Institute of Science and Engineering

College and School Educational Field


Laboratory of Analytical and Environmental Chemistry TEL:076-234-4793

Academic Background

【Academic background(Doctoral/Master's Degree)】
The University of Tokyo Doctor Graduate School of Frontier Science Natural Environmental Studies 201903 Completed
The University of Tokyo Master Graduate School of Frontier Science Natural Environmental Studies 201603 Completed
【Academic background(Bachelor's Degree)】
University of Cambridge 201401


Atmosphere and Ocean Research Institute, The University of Tokyo Project Researcher(2019/04/01-2021/04/30)

Year & Month of Birth


Academic Society

Association for the Science of Limnology and Oceanography
American Geoscience Union



Speciality Keywords

Chemical oceanography, trace metal, organic ligand, phytoplankton, electrochemical analysis

Research Themes

Evaluation and development of analytical techniques for measurements of metal-binding organic ligands in seawater

The bioavailability of trace metals in seawater for marine phytoplankton is highly dependent on the chemical speciation (including complexation with organic ligand) of the metal. Therefore, the analysis of these organic ligands is essential to understand the behavior of trace metals in the ocean. However, the diversity and low concentration of the organic ligands complicate measurements. In our work, we use electrochemical methods to improvise and develop new analytical methods for ligand measurement.

Elucidating trace metal distribution in the ocean

Elucidating trace metal distribution in the ocean Increasing human activities have led to greater discharge of heavy metals into the ocean. Under the international GEOTRACES project (https://www.geotraces.org/), we survey the North Pacific Ocean and its surrounding region and reveal the trace metal distribution in those waters.



  •  Long-range lateral transport of dissolved manganese and iron in the subarctic Pacific Kuo Hong Wong, Jun Nishioka, Taejin Kim, Hajime Obata Journal of Geophysical Research: Oceans 127 2022/02
  •  Speciation analysis of inorganic selenium in wastewater using a highly selective cellulose-based adsorbent via liquid electrode plasma optical emission spectrometry  Keisuke Nakakubo, Takashi Nishimura, Foni B. Biswas, Masaru Endo, Kuo H. Wong, Asami S. Mashio, Tsuyoshi Taniguchi, Tatsuya Nishimura, Katsuhiro Maeda, Hiroshi Hasegawa Journal of Hazardous Materials 424 127250 2022/02
  •  Sources and transport of dissolved Mn, Fe, Cu, and Co in a semi-enclosed bay (Ariake Sea) in Japan Idha Yulia Ikhsani, Ronald Muhammad, Jiarui Xu, Kuo Hong Wong, Shigenobu Takeda, Hajime Obata Estuarine, Coastal and Shelf Science 259 107475 2021/09
  •  Controls on the Distributions of Dissolved Cd, Cu, Zn, and Cu‐Binding Organic Ligands in the East China Sea  Kuo Hong Wong, Hajime Obata, Idha Yulia Ikhsani, Ronald Muhammad Journal of Geophysical Research: Oceans 126 2021/06
  •  New insights into the biogeochemical cycling of copper in the subarctic Pacific: Distributions, size fractionation, and organic complexation  Kuo Hong Wong, Hajime Obata, Taejin Kim, Yoshiko Kondo, Jun Nishioka Limnology and Oceanography 66 4 1424-1439 2021/04

show all

  •  Wide-range detection of Cu-binding organic ligands in seawater using reverse titration  Wiwit, Kuo Hong Wong, Hideki Fukuda, Hiroshi Ogawa, Asami S. Mashio, Yoshiko Kondo, Jun Nishioka, Hajime Obata Marine Chemistry 230 103927 2021/03
  •  Photodecomposition of natural organic metal-binding ligands from deep seawater  Mitsuhide Sato, Natsuki Ogata, Kuo Hong Wong, Hajime Obata, Shigenobu Takeda Marine Chemistry 230 103939 2021/03
  •  The Size Fractionation and Speciation of Iron in the Longqi Hydrothermal Plumes on the Southwest Indian Ridge  Hu Wang, Qiaoyang Yan, Qunhui Yang, Fuwu Ji, Kuo Hong Wong, Huaiyang Zhou Journal of Geophysical Research: Oceans 124 6 4029-4043 2019/06
  •  Distribution and speciation of copper and its relationship with FDOM in the East China Sea  Kuo Hong Wong, Hajime Obata, Taejin Kim, Yohei Wakuta, Shigenobu Takeda Marine Chemistry 212 96-107 2019/05
  •  Organic complexation of copper in estuarine waters: An assessment of the multi-detection window approach  Kuo Hong Wong, Hajime Obata, Taejin Kim, Asami Suzuki Mashio, Hideki Fukuda, Hiroshi Ogawa Marine Chemistry 204 144-151 2018/08
  •  Organic complexation of zinc in a coastal hydrothermal area, Tachibana Bay, Nagasaki, Japan  Taejin Kim, Hajime Obata, Shigenobu Takeda, Kuo Hong Wong, Asami Suzuki Mashio, Toshitaka Gamo GEOCHEMICAL JOURNAL 52 6 e29-e38 2018
  •  Dissolved trace metals (Fe, Mn, Pb, Cd, Cu, and Zn) in the eastern Indian Ocean Ikhsani, I., Wong, K., Ogawa, H., Obata, H. Marine Chemistry 248 2023/01/20
  •  Element pattern in two dominant species of seaweed from Betsukari coastline - Mashike, Hokkaido, Japan Akhyar, O., Mashio, A., Kato, Y., Hayashi, S., Wong, K., Kosugi, C., Hasegawa, H. Environmental Pollution 316 2023/01/01
  •  Organic complexation of copper in Japanese estuarine waters using reverse titration method Wiwit, Wong, K., Fukuda, H., Ogawa, H., Mashio, A., Obata, H. Journal of Oceanography 2022/12/26
  •  Very strong but exchangeable organic ligand of cobalt in the marginal sea Kuo Hong Wong, Jiarui Xu, Yoshiko Kondo, Shigenobu Takeda, Asami Mashio, Hiroshi Hasegawa, Hajime Obata Limnology and Oceanography 67 6 1299 2022/06
  •  Direct analysis of biodegradable chelating agents based on liquid chromatography/electrospray ionization mass spectrometry using a metal-free hydrophilic interaction liquid chromatographic column Murakami, T., Wakata, R., Mamorita, A., Mashio, A., Wong, K., Chinaka, S., Hasegawa, H. Analytical Sciences 2022/12/24
  •  Cross-linked dithiocarbamate-modified cellulose with enhanced thermal stability and dispersibility as a sorbent for arsenite removal Nakakubo, K., Endo, M., Sakai, Y., Biswas, F., Wong, K., Mashio, A., Taniguchi, T., Nishimura, T., Maeda, K., Hasegawa, H Chemosphere 307 2022/11
  •  Determination of the sub-picomolar concentration of dissolved palladium in open ocean seawater Mashio, A., Ichimura, A., Yamagishi, H., Wong, K., Obata, H., Hasegawa, H. Marine Chemistry 243 2022/06/20
  •  Enhanced remediation of arsenic-contaminated excavated soil using a binary blend of biodegradable surfactant and chelator Shafiqur Rahman, Ismail Rahman, Shengbin Ni, Yasuhiro Harada, Shuto Kasai, Keisuke Nakakubo, Zinnat Begum, Kuo Hong Wong, Asami Mashio, Akio Ohta, Hiroshi Hasegawa Journal of Hazardous Materials 431 2022/06

Conference Presentations

  • Distribution of thiols in the western North Pacific(2023/03/09)


Arts and Fieldwork


Theme to the desired joint research

Grant-in-Aid for Scientific Research


Competitive research funding,Contribution

Collaborative research,Consignment study

Classes (Bachelors)

Classes (Graduate Schools)

International Project

International Students

Lecture themes

Others (Social Activities)

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