Prof. Ming-Hung WongAdvisor/Research Chair Professor of Environmental Science, The Education University of Hong Kong
Speech Title: Dumping Waste at Sea as a Waste Management Option: The Case of Dumping Contaminated Sediment in Hong Kong
Abstract: From about 1850 to World War II, dredged sediment, municipal solid waste, and ship wreckage were dumped at sea. Sewage sludge was shipped to the North Sea and dumped at sea from Britain to reduce the pollution of municipal solid waste to the Thames in 1887. From World War II to 1972, discarded munitions, chemical warfare agents, and low-level waste were dumped at sea. The London Dumping Convention (1972) came to force to control the dumping of industrial waste, construction waste, etc. In the early days, sewage sludge and contaminated sediment were dumped at designated sites (coastal marine areas) in Hong Kong. The higher contents of heavy metals and organic pollutants caused environmental problems. This presentation focuses on two projects related to dumping contaminated sediments, one before and one after adopting the Environmental Impact Assessment in waste management in Hong Kong. For the 1st project, there were massive fish kills in fish culture zones due to contaminated sediment. The former shipyard was transformed into the Disney Land, and contaminated sediment was spread into fish culture zones during transportation to the dumped sites, causing massive fish kills, with a considerable compensation provided for the fish farmers. For the 2nd project, scientific inputs were used for monitoring and assessing the potential impacts of the dumped sediment at the designated dumping sites, with stringent requirements of constructing the facilities for containing the dumped sediment during the construction, pitching, and closing of the facilities when the deposit is complete. Detailed information is provided on the use of scientific inputs in ensuring the ecological and human health safety of the dumping sites and the surrounding areas, especially the nearby mariculture sites.
Biography: Prof. Wong is currently Advisor/Research Chai Professor (Environmental Science) of The Education University of Hong Kong, Member of the European Academy of Sciences and Arts, Chang Jiang Chair Professor of Ministry of Education, China, and Editor-in-Chief of Environmental Geochemistry and Health (Springer Nature). His research areas included environmental toxicology of persistent toxic substances, ecological restoration of contaminated sites, and resource reuse. Professor Wong has published more than 800 SCI papers. According to the World’s Top 2% Scientists List (Stanford University, 2019 and 2021), he ranked No. 6 (career-long) globally under Environmental Sciences, based on citation impact.
Prof. Wong served as the Coordinator of Central and North-East Asia of the project “Regionally based assessment of Persistent Toxic Substances”, and as a Panel Member (of three experts) of another project, “Chemicals Management Issues of developing countries and countries with economies in transition”, both sponsored by UNEP/GEF, during 2001-2003, and 2010-2012, respectively.
Prof. Chih-Huang WengChairman of Department of Civil Engineering I-Shou University
Speech Title: Adsorption Characteristics of Ni(II), Zn(II), and Cu(II) Ions onto Pineapple Leaf Biochar
Abstract: Although research on metal adsorption via biochar has gained intensive attention over the last decade, the reaction mechanisms responsible for metal adsorption remain uncertain. This is the first work that provides direct evidence on the identification of Ni(II), Zn(II), and Cu(II) adsorption mechanisms on pineapple leaf biochar (PLB) using surface characteristics analyses, including X-ray photoelectron spectroscope (XPS), Fourier transform infrared spectroscope (FTIR), and scanning electron microscope with energy-dispersive X-ray spectroscope (SEM-EDS). Indispensable parameters, including temperature, ionic strength, and pH, affect much on adsorption. From Langmuir isotherm fitting, the maximum adsorption capacity of PLB for Ni(II), Zn(II), and Cu(II) are 44.88, 46.00, and 53.14 mg g-1, respectively, surpassing all biochars reported in the literature. Findings of surface characterization techniques coupled with cation released during adsorption, cation exchange, and surface complexation mechanisms were proposed. PLB is reusable and remains sufficient adsorption capacity even six consecutive cycles via pressure cooker regeneration. With high regenerability and ultrahigh adsorption capacity, PLB defines itself as a promising cost-effective adsorbent for future applications in metal-laden wastewater.
This study also provides framework for understanding how metal ions react with biochar.
Biography: Professor Chih-Huang Weng is the Chairman of Department of Civil Engineering at I-Shou University, Taiwan. He also served as vice-president of North Kaohsiung Community University, Taiwan. He received his MS and Ph.D. degrees in 1990 and 1994, respectively, from the Department of Civil Engineering of The University of Delaware, USA. He has published over 100 journal articles with around 7050 citations, 43 h-index and 80 i10-index in google scholar database. Based on the 2020 updated science-wide author databases of standardized citation indicators (https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3000918), his publication citation was listed on the top 1% and ranked at 263rd among 42482 authors in the category of Engineering, Environmental. He was listed in the World’s Top 2% Scientists based on 2021 Sandford University published an update database of the most widely cited scientists in different disciplines. He has earned number of awards and honors, including the National Innovation Award by the Research Center for Biotechnology and Medicine Policy, Taiwan. He is serving as the Associate Editor of Environmental Geochemistry and Health (Springer, since 2020) and on the Editorial Board Panel Member of Coloration Technology (Wiley, since 2013). He has also served as a Guest Editor of SCI journals, such as Agricultural Water Management (V. 174, Aug. 2016 (https://doi.org/10.1016/j.agwat.2016.06.012) and Environmental Science and Pollution Research (V. 26, issue 30, Oct. 2019 (https://doi.org/10.1007/s11356-019-06281-w); V. 27, issue 31, Oct. 2020 (https://doi.org/10.1007/s11356-020-09994-5), V. 28, issue 34, Sep. 2021 (https://doi.org/10.1007/s11356-021-15004-z), V. 29, issue 9, Feb. 2022 (https://doi.org/10.1007/s11356-021-17392-8). He has also organized and chaired several international conferences. His main research interests focus on using advanced oxidation processes and adsorption for the treatment of wastewater and bacteria inactivation, ground water modeling, and application of electrokinetic technologies to soil remediation/sludge treatment/activated carbon regeneration.
List of speakers will be updated soon...