China Science and Technology Network • Science and Technology Daily Beijing May 24 (Reporter Hua Ling) The 4th International Conference on Capacitor Deionization and Electrosorption (CDI&E 2019) was held at Tsinghua University from May 20th to 24th. The conference was co-sponsored by Tsinghua University, the National Key Joint Laboratory of Environmental Simulation and Pollution Control.
Chairman of the conference and Associate Professor Liang Peng of the Environmental College of Tsinghua University said that compared with high-pressure membrane separation and thermal evaporation, the electrosorption technology has wide application range, strong tolerance, high water production rate, simple operation and no secondary pollution. Other advantages, have better desalination performance under certain conditions. At the same time, the advantages of electrosorption technology in the fields of energy storage, seawater desalination, brackish water purification, etc. are also prominent. The development of the technology and industrial application of this technology have China's energy industry, water environment optimization, industrial wastewater treatment, and residential water health. Significance.
Professor Bert van der Wal, member of the International Electro-adsorption Technology Working Group and Professor of Wagen van der Wal of the University of Wageningen in the Netherlands, said in an interview with reporters that electrosorption technology has a good reputation for recycling industrial, municipal and civil wastewater and industrial cooling towers. Application prospects. It can process and produce high-quality drinking water for civilian use. It has the characteristics of low wastewater rate and good soft water function. Especially in the selective removal of toxic and harmful substances, it has the advantage that other water treatment technologies can't match.
It is reported that at this meeting, 28 experts in the field of capacitive deionization and electrosorption research from 15 countries and regions including China, the Netherlands, Australia, the United States, and South Korea published keynote reports and invited reports on the theory of capacitive deionization. Research, electrode and membrane material scale production, operation parameter optimization, device amplification, application expansion, and breakthroughs in the research of new electrode materials on the application of capacitor deionization technology may have a wide range of exchanges and in-depth discussions.
Researcher Maarten Biesheuvel from Wetsus, The Netherlands, introduced the research status and development trend of new capacitive electrode materials for electrode deionization. It is pointed out that the breakthrough of electrode materials will have a subversive effect on the application of capacitive deionization technology. Academician David Waite of the University of New South Wales, Australia, Academician Bruce Logan of Pennsylvania State University, Professor Bert Van der Val of Wetsus, Netherlands, Professor Michael Stadermann of Lawrence Livermore National Laboratory, Professor Huang Xia of Tsinghua University, Professor Xu Tongwen of China University of Science and Technology, etc. The report, involving theoretical research on capacitive deionization technology, large-scale production of electrode and membrane materials, optimization of operating parameters, device amplification, application development, etc., received positive response and high evaluation from the participants, and the atmosphere of the discussion was warm.
According to reports, the International Working Group on Electrosorption Adsorption (CDI&E) was established in the Netherlands on May 27, 2014. It is the only professional organization of electrosorption technology in the international scope. Its main task is to release the definition and measurement technology of electrosorption system. And data analysis guides to promote the development and application of electrosorption technology, and promote the exchange and cooperation of relevant researchers around the world. Since the establishment of the working group, the development of electrosorption technology has been greatly promoted.
Previously, the International Symposium on Capacitor Deionization and Electrosorption was held in the Netherlands, Germany and South Korea for three sessions, and the International Working Group on Electrosorption Technology gave scientific guidance to the conference. The International Electro-Adsorption Technology Working Group was established in May 2014, its main
Electrosorption technology, referred to as (EST), also known as capacitive desalination technology began in the 1960s and began to emerge in the late 1990s. This technology has broad development space in the field of water treatment and electric energy storage. The application of electrosorption technology in the field of water treatment mainly includes industrial wastewater treatment and reuse, water purification, seawater desalination, special separation and so on.
From the 1960s to the 1980s, starting from the University of Oklahoma to study the removal of salinity in slightly alkaline water, Y. Oren et al. studied the basic theory of electrosorption and electrosorption techniques, the influence of parameters, and various candidate electrodes. Evaluation of materials; in the 1990s, Mark Law of the Lawrence Livermore National Laboratory in California conducted a pilot test on the desalination test and achieved good test results. Breaking through the choice of electrode materials and the core technology of electrode structure design; at the beginning of this century, SangHoon et al. established an electrosorption model to study the adsorption potential of electrosorption modules, and studied the design parameters of the modules and the operating conditions in operation. Wegemoned et al. established a laboratory model to treat industrial circulating cooling water with a TDS of 1000 mg/L, and the effluent TDS reached 10 mg/L. The research papers in this field have increased from 2 articles/year in 2000 to more than 300 papers/year in 2018, which has attracted much attention.
At present, the research and application of this technology abroad is still in the laboratory research and small-scale application stage, and the research on domestic electric adsorption technology is developing rapidly. Since the beginning of this century, Aisite Water Technology Co., Ltd., Jiangsu Yuanyuan Water Technology Co., Ltd., Shanghai Hongji Water Technology Co., Ltd. and other enterprises based on electrode materials, electrosorption system control and integrated applications, in water depth There are practical projects in the field of treatment and industrial wastewater reuse.
In recent years, research institutes such as Tsinghua University, Nanjing University, East China University of Science and Technology, Dalian University of Technology, Beijing University of Science and Technology, and Beijing University of Chemical Technology have also achieved remarkable results in the research and development of electrosorption technology. Dr. Sun Xiaowei from Shanghai Hongji Water Technology Co., Ltd. has made breakthroughs in electrode materials, system control and integration applications of electrosorption, and successfully developed a large-scale industrial electrosorption system with EST module as the core, and in drinking water depth. A wide range of engineering applications have been carried out in the treatment and industrial wastewater treatment. This indicates that China's electric adsorption technology has reached the international leading level.