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Researcher Information

last modified:2024/04/12

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
  •  Rapid arsenate removal using novel adsorbent: Iron–zirconium nanoneedle-modified cellulose nanofibers Sakai, Y., Shil, R., Endo, M., Marumoto, M., Nakakubo, K., Rocky, M., Wong, K., Mashio, A., Hasegawa, H. Colloids and Surfaces A: Physicochemical and Engineering Aspects 686 133290 2024/04
  •  Dissolved zinc in the western Bering Sea and near Kamchatka Strait: A coastal source and transport to the subarctic Pacific Wong, K., Obata, H., Kim, T., Tazoe, H., Mashio, A., Hasegawa, H., Nishioka, J. Marine Chemistry 260 104375 2024/03
  •  Zn ions and Fe plaque jointly alleviate Cu toxicity in Sargassum patens C. Agardh Akhyar, O., Wong, K., Papry, R., Kato, Y., Mashio, A., Zuka, M., Hasegawa, H. Aquatic Botany 189 103700 2023/11
  •  Remediation of cadmium-contaminated soil: GLDA-assisted extraction and sequential FeCl3–CaO-based post-stabilization Ni, S., Rahman, S., Harada, Y., Yoshioka, S., Imaizumi, M., Wong, K., Mashio, A., Ohta, A., Hasegawa, H. Chemosphere 346 140554 2024/01
  •  Cellular uptake and biotransformation of arsenate by freshwater phytoplankton under salinity gradient revealed by single-cell ICP-MS and CT-HG-AAS Alam, S., Fujisawa, S., Zuka, M., Zai, Y., Mashio, A., Rahman, I., Wong, K., Hasegawa, H. Environmental Chemistry 20 4 183-195 2023/08
  •  Enhanced recovery of gold from aqua regia leachate of electronic waste using dithiocarbamate-modified cellulose Rocky, M., Rahman, I., Sakai, Y., Biswas, F., Rahman, S., Endo, M., Wong, K., Mashio, A., Hasegawa, H. Journal of Material Cycles and Waste Management 26 816-829 2023/10
  •  Evaluation of newly designed flushing techniques for on-site remediation of arsenic-contaminated excavated debris Rahman, S., Saito, M., Yoshioka, S., Ni, S., Wong, K., Mashio, A., Begum, Z., Rahman, I., Ohta, A., Hasegawa, H., Environmental Science and Pollution Research 30 112052-112070 2023/10
  •  Cellulose-based materials for scavenging toxic and precious metals from water and wastewater: A review Rocky, M., Rahman, I., Biswas, F., Rahman, S., Endo, M., Wong, K., Mashio, A., Hasegawa, H. Chemical Engineering Journal 472 144677 2023/09
  •  Development of a new detection method for cadmium in marine phytoplankton based on single cell inductively coupled plasma mass spectrometry Zai, Y., Wong, K., Fujizawa, S., Ishikawa, A., Li, M., Mashio, A., Hasegawa, H. Spectrochimica Acta Part B: Atomic Spectroscopy 209 106801 2023/11
  •  Insight into stability of dithiocarbamate-modified adsorbents: Oxidation of dithiocarbamate Nakakubo, N., Biswas, F., Taniguchi, T., Endo, M., Sakai, Y., Wong, K., Mashio, A., Nishimura, T., Maeda, K., Hasegawa, H. Chemosphere 343 140216 2023/12
  •  Distributions of humic substances in an estuarine region (Otsuchi Bay, Japan) determined using electrochemical and optical methods Lee, Y., Wong, K., Obata, H., Nishitani, K., Ogawa, H., Fukuda, H., Lu, C. Marine Chemistry 256 104301 2023/10
  •  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 2023/08
  •  Remediation of lead-contaminated shooting range soil: Biodegradable chelator-assisted washing and subsequent post-treatment using FeCl3 and CaO Ni, S., Rahman, S., Kasai, S., Yoshioka, S., Wong, K., Mashio, A., Hasegawa, H. Environmental Technology & Innovation 31 103172 2023/08
  •  Revisiting the Synthesis of Cellulose Acrylate and Its Modification via Michael Addition Reactions Okamoto, H., Taniguchi, T., Takekuma, M., Mashio, A., Wong, K., Hasegawa, H., Nishimura, T., Maeda, K. Biomacromolecules 24 8 3767-3774 2023/07
  •  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 39 663-670 2023/05
  •  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
  •  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
  •  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

  • Effect of copper-binding organic ligands on phytoplankton growth in Japanese coastal waters(conference:Ocean Sciences Meeting 2024)(2024/02)
  • 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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