Effects of Municipal Sludge on Air Pollutant Emissions Characteristics

A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Air Pollution Control".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 1107

Special Issue Editors

College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Interests: clean and efficient combustion technology of coal; air pollutants control; CO2 capture and utilization; recycling of waste
Special Issues, Collections and Topics in MDPI journals
College of Economics and Management, Taiyuan University of Technology, Taiyuan 030024, China
Interests: synergistic emission reduction; environmental system modelling and optimization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nowadays, clean and efficient combustion technology has become a major demand in the fields of energy and environment. With the rapid development of urbanization and the improvement of environmental control requirements, the output of municipal sludge is increasing year by year, and the disposal of large amounts of sludge is facing unprecedented challenges. Meanwhile, as sludge is used as high-ash fuel, a large amount of inhalable particulate matter with a diameter of less than 10 μm (PM10) will be generated during the combustion process. Although control equipment such as electrostatic precipitators and bag filters have been installed in the current industrial production process at this stage, the comprehensive capture efficiency of fine particles in flue gas is low, which leads to their direct discharge to the atmosphere. These emitted inhalable particulates are of great harm to human health, especially can easily cause diseases of the respiratory system and cardiopulmonary function. Moreover, because of its high specific surface area, it can provide a large number of adsorption sites for heavy metals and other toxic substances in the air, and stay in the air for a long time, thus causing secondary harm to human health. And the fuel characteristics and combustion temperature have important effects on the formation of particulate matter. In addition, the mineral components of the sludge are complex, and the minerals contained in the sludge will interact with each other under high-temperature combustion conditions, thus affecting the migration and transformation of particulate matter. Therefore, how to achieve harmless reduction treatment and avoid secondary environmental pollution based on the characteristics of high moisture and ash content and low calorific value of sludge has become a work with practical application value.

Topics of interest of the Special Issue include but are not limited to:

  • Development of technologies intended for applications to control particulate matter
  • Synergistic emission reduction between particulate matter and other air pollutants (such as heavy metals, SO2, NOX)
  • Management and recycling of municipal sludge wastes
  • Energy efficiency, economics, and climate finance policies
  • Transitional pathways to renewable energy future

Dr. Li Jia
Dr. Yue Yu
Guest Editors

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Keywords

  • air pollutant emissions
  • particulate matter
  • air pollution control

Published Papers (1 paper)

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Research

17 pages, 3183 KiB  
Article
Preparation and Mercury Removal Performance of Mg-MOF-74 Composites
by Yue Yu, Jizu Li, Peng Cheng, Haotian Nie, Ling He, Qizhen Yan, Yulan Zheng, Yawen Wu and Li Jia
Atmosphere 2023, 14(10), 1551; https://doi.org/10.3390/atmos14101551 - 11 Oct 2023
Viewed by 832
Abstract
A metal–organic framework (MOF) material Mg-MOF-74 was prepared by a solvothermal method, and the influence of the solvent volume and mass–liquid ratio on the preparation process was investigated. Based on the iron-based modified biochar FeCeCu/BC obtained by the sol–gel method, functionalized modified MOF-based [...] Read more.
A metal–organic framework (MOF) material Mg-MOF-74 was prepared by a solvothermal method, and the influence of the solvent volume and mass–liquid ratio on the preparation process was investigated. Based on the iron-based modified biochar FeCeCu/BC obtained by the sol–gel method, functionalized modified MOF-based biochar composites were prepared by the physical mixing method, co-pyrolysis method, sol–gel method and in situ growth method. The mercury removal performance and structural characteristics of the samples were studied, and the adsorption mechanism and key action mechanism were studied by using the adsorption kinetic model. Increasing the solvent volume and the mass liquid ratio will make the crystallization and pore structure of Mg-MOF-74 worse and its mercury removal performance poor. For MOF-based FeCeCu/BC composites, the mercury removal performance of the composite samples prepared by the sol–gel method and co-pyrolysis method is the best, at 31% and 46% higher than that of modified biochar, respectively. Mg-MOF-74 plays a role in promoting pyrolysis and changing the pore structure in the composite. The mercury removal process of composite materials is the result of physical adsorption and chemical adsorption, external mass transfer and internal diffusion. Full article
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