Dynamic characteristics of chlorine dispersion process and quantitative risk assessment of pollution hazard

Study on the potential risks under a hazardous gas leakage accident: effects of source characteristics and ambient wind velocities

In this study, a full-scale storage tank was established to investigate the potential risks of leakage accident. We have developed a series of leak scenarios that close to real accidents and have divided the ambient areas according to relevant regulations. Considering the variety and complexity of real-life accident scenarios, the presented work revealed the combined effect of source release intensity and ambient wind speed on dispersion features by classifying leakage scenarios into active or passive release. The environmental hazards in each area is evaluated under various leak scenarios. The results show that when the approaching wind speed is low, the leakage on the windward side is the most dangerous release pattern. With the increase of the wind speed, the case with jet angle perpendicular to the incoming wind produces the largest cloud volume. Top release is the least dangerous way among the studied leak scenarios. However, the results illustrate that under some release angles, the cloud volume near the tank is not sensitive to wind speed. In leak accidents, quantitatively analysis reveals that the commonly used dimensionless concentrations ([Formula: see text]) cannot be used as a suitable parameter to discuss the concentration field except under top/leeward passive release conditions. This study will be beneficial to on-site rescue and decision-making when leakage accidents occur and provide reasonable suggestions for subsequent research on the environmental impact of container leakage and the diffusion of pollutants.

Environmental concerns and pollution control in the context of developing countries

In the developing countries, the pace of change-in vital technologies, in scientific research, in economic fundamentals, in the living environment, and in pursuing quality of life-is accelerating every day, propelled by continuous changes in technology innovation, human activities, and the rapidly evolving demands of the COVID-19 pandemic. This special issue (SI) of Environmental Science and Pollution Research (ESPR) collected 17 peer-reviewed articles relating to green buildings research, the impact of climate change on the extreme weather events, forward osmosis membranes for water reuse, the impacts of human activities to fragile water environments and economy, air pollution control and carbon emission reduction, risk assessment of pollution hazard and water resources, adsorption reaction of antibiotic pollution in subsurface, synthesized novel adsorptive materials in response to nitrogen and phosphorus, dye, and toluene pollution. All selected papers were relevance to the theme of this SI and formally presented at the 2020 5th International Conference on Advances in Energy and Environment Research (ICAEER 2020) on September 18th-20th, 2020, Shanghai, China. For the safety of the participants, ICAEER 2020 was held via online presentation because of the coronavirus pandemic sweeping across all over the world. As an annually held conference, the upcoming 6th ICAEER 2021 is scheduled held in Shanghai from September 10 to 12, 2021 ( http://www.icaeer.org/index.html ). The guest editor (GE) of this SI welcomes you all to participate in this conference.