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Environmental Remediation NewsSite Cleanup & RedevelopmentSoil Remediation

Study offers ways to minimize environmental risks from train derailments

Evaluating four different questions, researchers weigh the risks of exposure to vinyl chloride in the aftermath of the Ohio train derailment.

train derailment
April 3, 2023

On February 3, 2023, a train derailed in the United States near East Palestine, Ohio, leading to the combustion of vinyl chloride. Following that accident, an international team of researchers undertook an in-depth analysis of the environmental consequences of the accident.

Their analysis is published in the journal Frontiers of Environmental Science & Engineering on March 15, 2023.

In their analysis, the team examined a series of questions related to the environmental risk and management of the chemical accident. “We emphasized that it is unscientific to overestimate or underestimate the environmental risk of this event, and that an accurate environmental risk assessment requires comprehensive environmental monitoring data, which is currently far from complete. However, based on the chemical amount, nature, and combustion conditions, the potential environmental risks of the leaked chemicals and their combustion by-products deserve attention,” said Bin Wang, an associate professor at Tsinghua University.

The first question the team explored was whether or not vinyl chloride should be burned on the spot after the train derailed. The team noted that moving the derailed chemical tank cars can be very difficult and dangerous, so it is better to deal with the chemical at the scene of the accident. There was a risk of explosion, which is more dangerous and uncontrollable than ignition.

The second question the team examined was whether or not the vinyl chloride burned under control in this accident. They noted that emergency responders carried out a “controlled combustion” after the train derailed. However even with controlled combustion, hazardous by-products can be generated. Because of the hazardous effects of vinyl chloride and its combustion byproducts, it was necessary to evacuate the local residents.

The third question the team raised was what environmental risk was caused by the combustion of vinyl chloride in this accident. They noted that publicly there were conflicting views about the environmental risk. Some believed that the risk was very high, fearing that the accident would pollute Lake Erie and the Ohio River, which provides drinking water for millions of people. Others held the opposing view felt that the environmental risk was very small. Based on the view that the risk was small, the mandatory evacuation order was revoked on February 8, when monitoring showed that the water and air were safe. The team suggests that both of these opposing views might be wrong. They note that the accident has surely caused environmental and health risks to some extent. While the pollution in the air would quickly decrease, chemicals in the soil and groundwater will continue to pollute the environment over a long period of time unless they are cleaned up.

The fourth question the team examined was what follow-up work should be done. At this point there is not enough information to conduct a comprehensive risk assessment. Follow-up work that includes monitoring and evaluation, hazardous waste disposal, site remediation, and resident relocation is needed. This comprehensive risk assessment and remediation will take time. While this assessment is happening, local residents should be relocated to avoid potential exposure to the toxic chemicals. If the assessment confirms that the environment is free of risks, then the residents can return to their homes.

“In this emergency case, there were actually no good solutions to simultaneously avoid explosion and environmental risks after the train derailment. Hence it is better to solve the chemical risks from the source. We also need to bridge the gap between chemical safety management and environmental risk management,” said Wang. The team notes that while modern industry and agriculture require the use of more and more chemicals, these chemicals can pollute the environment. They suggest ways to reduce the risks by substituting highly hazardous chemicals for more environment-friendly ones, through safer handling of chemicals, and with stricter transportation management.

Since long before the February 2023 train derailment, the research team has been engaged in research on environmental risk assessment and control of chemicals, including the chemicals themselves and their by-products. “With regard to the emerging contaminant control action being carried out in China, we expect to be able to more closely link environmental pollutants and their source chemicals to coordinate chemical safety management and environmental risk management. We hope that our research and proposals can contribute to a healthy environment free of toxic chemicals,” said Wang.

The research team includes Bin Wang, Tsinghua University and Research Institute for Environmental Innovation (Suzhou); Liping Heng, Beihang University; Qian Sui, East China University of Science and Technology; Zheng Peng and Xuezhi Xiao, Ministry of Ecology and Environment of China; Minghui Zheng, Chinese Academy of Sciences; Jianxin Hu, Peking University; Heidelore Fiedler, Örebro University; Damià Barceló, Spanish Council for Scientific Research; and Gang Yu, Tsinghua University and the Research Institute for Environmental Innovation (Suzhou) and Beijing Normal University.EnvironmentalRisk

About Higher Education Press

Founded in May 1954, Higher Education Press Limited Company (HEP), affiliated with the Ministry of Education, is one of the earliest institutions committed to educational publishing after the establishment of P. R. China in 1949. After striving for six decades, HEP has developed into a major comprehensive publisher, with products in various forms and at different levels. Both for import and export, HEP has been striving to fill in the gap of domestic and foreign markets and meet the demand of global customers by collaborating with more than 200 partners throughout the world and selling products and services in 32 languages globally. Now, HEP ranks among China‘s top publishers in terms of copyright export volume and the world‘s top 50 largest publishing enterprises in terms of comprehensive strength.

The Frontiers Journals series published by HEP includes 28 English academic journals, covering the largest academic fields in China at present. Among the series, 13 have been indexed by SCI, 6 by EI, 2 by MEDLINE, 1 by A&HCI. HEP‘s academic monographs have won about 300 different kinds of publishing funds and awards both at home and abroad.

About Frontiers of Environmental Science & Engineering

Frontiers of Environmental Science & Engineering (FESE) is the leading edge forum for peer-reviewed original submissions in English on all main branches of environmental disciplines. FESE welcomes original research papers, review articles, short communications, and views & comments. All the papers will be published within 6 months since they are submitted. The Editors-in-Chief are Academician Jiuhui Qu from Tsinghua University, and Prof. John C. Crittenden from Georgia Institute of Technology, USA. The journal has been indexed by almost all the authoritative databases such as SCI, Ei, INSPEC, SCOPUS, CSCD, etc.

Source: Higher Education Press Limited Company
KEYWORDS: contaminated soil environmental contaminants site cleanup train derailment

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