The Experts below are selected from a list of 113586 Experts worldwide ranked by ideXlab platform
Shiqiu Zhang - One of the best experts on this subject based on the ideXlab platform.
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air Pollution Control policies in china a retrospective and prospects
International Journal of Environmental Research and Public Health, 2016Co-Authors: Yana Jin, Henrik Andersson, Shiqiu ZhangAbstract:With China’s significant role on Pollution emissions and related health damage, deep and up-to-date understanding of China’s air Pollution policies is of worldwide relevance. Based on scientific evidence for the evolution of air Pollution and the institutional background of environmental governance in China, we examine the development of air Pollution Control policies from the 1980s and onwards. We show that: (1) The early policies, until 2005, were ineffective at reducing emissions; (2) During 2006–2012, new instruments which interact with political incentives were introduced in the 11th Five-Year Plan, and the national goal of reducing total sulfur dioxide (SO2) emissions by 10% was achieved. However, regional compound air Pollution problems dominated by fine particulate matter (PM2.5) and ground level ozone (O3) emerged and worsened; (3) After the winter-long PM2.5 episode in eastern China in 2013, air Pollution Control policies have been experiencing significant changes on multiple fronts. In this work we analyze the different policy changes, the drivers of changes and key factors influencing the effectiveness of policies in these three stages. Lessons derived from the policy evolution have implications for future studies, as well as further reforming the management scheme towards air quality and health risk oriented directions.
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will joint regional air Pollution Control be more cost effective an empirical study of china s beijing tianjin hebei region
Journal of Environmental Management, 2015Co-Authors: Shiqiu ZhangAbstract:By following an empirical approach, this study proves that joint regional air Pollution Control (JRAPC) in the BeijingeTianjineHebei region will save the expense on air Pollution Control compared with a locallybased Pollution Control strategy. The evidences below were found. (A) Local pollutant concentration in some of the cities is significantly affected by emissions from their surrounding areas. (B) There is heterogeneity in the marginal pollutant concentration reduction cost among various districts as a result of the cities' varying contribution of unit emission reduction to the pollutant concentration reduction, and their diverse unit cost of emission reduction brought about by their different industry composition. The results imply that the cost-efficiency of air Pollution Control will be improved in China if the conventional locally based regime of air Pollution Control can shift to a regionally based one. © 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license
Li Wang - One of the best experts on this subject based on the ideXlab platform.
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speciation and thermal stability of mercury in solid products from ultralow emission air Pollution Control devices
Energy & Fuels, 2018Co-Authors: Chenghang Zheng, Li Wang, Shaojun Liu, Chengsi Liang, Haitao Zhao, Yongxin Zhang, Xiang GaoAbstract:The thermal stability of mercury (Hg) is a key factor that influences its solidification. However, the thermal stability of Hg in ultralow emission coal-fired power plants remains unclear. This study aimed to employ the temperature-programmed desorption technique to identify the forms and mass distribution of Hg species in solid products across air Pollution Control devices (APCDs) in typical ultralow emission coal-fired power plants. The migration mechanism of Hg across APCDs was determined by comparing the Hg species present in different solid samples. Furthermore, the impacts of different ultralow emission Pollution Control devices on Hg migration were obtained by comparing Hg compounds in solid products from different units. Results showed that Hg in the fly ash was mainly in the form of HgCl2 (41–47%) and HgS (43–47%). HgCl2 tended to be abundant in fine particles, and HgCl2 accounted for 90.68% of Hg in wet electrostatic precipitator (WESP) slag. HgCl2 (28–29%) and HgS (21–85%) were the dominant Hg ...
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taking action on air Pollution Control in the beijing tianjin hebei bth region progress challenges and opportunities
International Journal of Environmental Research and Public Health, 2018Co-Authors: Li Wang, Fengying Zhang, Eva Pilot, Chengjing Nie, Jennifer Holdaway, Linsheng Yang, Wuyi Wang, Sotiris Vardoulakis, Thomas KrafftAbstract:Due to rapid urbanization, industrialization and motorization, a large number of Chinese cities are affected by heavy air Pollution. In order to explore progress, remaining challenges, and sustainability of air Pollution Control in the Beijing-Tianjin-Hebei (BTH) region after 2013, a mixed method analysis was undertaken. The quantitative analysis comprised an overview of air quality management in the BTH region. Semi-structured expert interviews were conducted with 12 stakeholders from various levels of government and research institutions who played substantial roles either in decision-making or in research and advising on air Pollution Control in the BTH region. The results indicated that with the stringent air Pollution Control policies, the air quality in BTH meets the targets of the Air Pollution Prevention and Control Action Plan. However, improvements vary across the region and for different pollutants. Although implementation has been decisive and was at least in parts effectively enforced, significant challenges remained with regard to industrial and traffic emission Control, and national air quality limits continued to be significantly exceeded and competing development interests remained mainly unsolved. There were also concerns about the sustainability of the current air Pollution Control measures especially for industries due to the top-down enforcement, and the associated large burden of social cost including unemployment and social inequity resulting industrial restructuring. Better mechanisms for ensuring cross-sectoral coordination and for improved central-local government communication were suggested. Further suggestions were provided to improve the conceptual design and effective implementation of respective air Pollution Control strategies in BTH. Our study highlights some of the major hurdles that need to be addressed to succeed with a comprehensive air Pollution Control management for the Chinese mega-urban agglomerations.
Jiayu Shen - One of the best experts on this subject based on the ideXlab platform.
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Input-output dynamic model for optimal environmental Pollution Control
Applied Mathematical Modelling, 2020Co-Authors: Xin Chen, Yuanguo Zhu, Jiayu ShenAbstract:Abstract This paper describes the allocation of a wastewater treatment fund within a region based on a dynamic input-output model. Considering the complexity of the input-output process, many indeterminate factors must be included in the model. For example, with the aging of machines, an unexpected loss will be caused by the retention of raw materials during an operation; this can be realistically considered as a random variable, because of the sufficiently large amount of historical data. By contrast, actions such as a temporary transfer or inexperienced operators can only be regard as uncertain variables, because of a lack of historical data. First, the Pollution Control model is formulated in an uncertain environment by including both human uncertainty and objective randomness. Second, an optimal Control model subject to an uncertain random singular system is established; this model can be transformed into an equivalent optimization problem. To solve such a problem, recurrence equations are presented based on Bellman’s principle, and these were successfully applied to address the optimal Control problem in two special cases. Moreover, two algorithms are formulated for solving the Pollution Control problem. Finally, the optimal distribution strategies of the Pollution Control fund used to Control the emissions of COD and NH3-H, which are two indicators of wastewater in China, were obtained through the proposed algorithms.
Thomas Krafft - One of the best experts on this subject based on the ideXlab platform.
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taking action on air Pollution Control in the beijing tianjin hebei bth region progress challenges and opportunities
International Journal of Environmental Research and Public Health, 2018Co-Authors: Li Wang, Fengying Zhang, Eva Pilot, Chengjing Nie, Jennifer Holdaway, Linsheng Yang, Wuyi Wang, Sotiris Vardoulakis, Thomas KrafftAbstract:Due to rapid urbanization, industrialization and motorization, a large number of Chinese cities are affected by heavy air Pollution. In order to explore progress, remaining challenges, and sustainability of air Pollution Control in the Beijing-Tianjin-Hebei (BTH) region after 2013, a mixed method analysis was undertaken. The quantitative analysis comprised an overview of air quality management in the BTH region. Semi-structured expert interviews were conducted with 12 stakeholders from various levels of government and research institutions who played substantial roles either in decision-making or in research and advising on air Pollution Control in the BTH region. The results indicated that with the stringent air Pollution Control policies, the air quality in BTH meets the targets of the Air Pollution Prevention and Control Action Plan. However, improvements vary across the region and for different pollutants. Although implementation has been decisive and was at least in parts effectively enforced, significant challenges remained with regard to industrial and traffic emission Control, and national air quality limits continued to be significantly exceeded and competing development interests remained mainly unsolved. There were also concerns about the sustainability of the current air Pollution Control measures especially for industries due to the top-down enforcement, and the associated large burden of social cost including unemployment and social inequity resulting industrial restructuring. Better mechanisms for ensuring cross-sectoral coordination and for improved central-local government communication were suggested. Further suggestions were provided to improve the conceptual design and effective implementation of respective air Pollution Control strategies in BTH. Our study highlights some of the major hurdles that need to be addressed to succeed with a comprehensive air Pollution Control management for the Chinese mega-urban agglomerations.
Guangming Xiang - One of the best experts on this subject based on the ideXlab platform.
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development of coal combustion Pollution Control for so2 and nox in china
Fuel Processing Technology, 2000Co-Authors: Changhe Chen, Changfu You, Guangming XiangAbstract:Abstract Pollution Control of coal combustion in China is a very urgent task. New low-NO x combustion and flue gas desulfurization (FGD) techniques suitable for China should be researched and developed. These techniques should be comparably effective, but have low investments, operating cost and water consumption, so that they can be widely used in China. To optimize the ecology of the coal-energy system and find new measures to rectify large areas of saline-alkali soil and deserts in China is important.
