Research Topic

Circular Economy of Urban Water and Wastewater under the Current Climate Changes

About this Research Topic

Water quality remains one of the major challenges that we are facing in the 21st century. Every year, over one billion people are affected by waterborne diseases (diarrhea, typhoid, etc.) caused by water pollution. Around 90% of sewage in developing countries is discharged directly into water bodies without receiving adequate treatment. Changing climate patterns also represent a new water quality challenge, which translates into environmental, social and economic problems including the scarcity of water resources. We are now facing new challenges beyond the management of conventional regulated contaminants. We must also reduce nutrients (nitrogen and phosphorus) and manage a growing list of non-conventional unregulated contaminants, collectively termed contaminants of emerging concern such as pharmaceuticals, personal care products, pesticides, and industrial chemicals with unknown long-term impacts on human health and the environment. The 2030 Agenda for Sustainable Development calls for international action by setting Goal 6 on clean water and sanitation in response to the global concern over water-related issues. Such clear focus on water quality underlines the urgent need for addressing water and wastewater problems in innovative ways and substantially improves water quality, increases recycling and safe reuse, and reconsider new paradigms that focus on extracting valuable resources from wastewater to facilitate the transition to a circular economy. This will ultimately lead to a better design and management of urban infrastructure systems and create more sustainable cities and communities.

This Research Topic aims to focus on the circular economy for water and wastewater treatment and reclamation, impacts and removal of contaminants of emerging concern and nutrient removal. Other focuses of this Research Topic include resource recovery, sludge management and transformation, fate and transport of contaminants in the urban water cycle, and routes and mechanisms of contaminants removal using various biological and physicochemical methods. This Research Topic is particularly interested in articles based on state-of-the-art monitoring techniques, innovative treatment methods, and process modelling. In addition to the human health and environmental impact of contaminated waters as they represent a growing scientific and public concern. We also welcome articles that demonstrate advancement in scientific research, legal knowledge, and equity considerations in water and wastewater related issues in cities.

The topics of interest include but are not limited to the following:
• Contaminated waters and public health in cities
• Urban Water/wastewater quality monitoring and analytical advancements
• Wastewater treatment technologies under the circular economy
• Nutrient removal technologies and resource recovery under the circular economy
• Urban sludge management and transformation
• Fate and transport of pollutants in the urban water cycle
• Impacts and removal of contaminants of emerging concern
• Water scarcity, resource management, and water governance in cities


Keywords: Wastewater Treatment, Contaminants of Emerging Concern, Resource Recovery, Water Quality, Climate Change.


Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.

Water quality remains one of the major challenges that we are facing in the 21st century. Every year, over one billion people are affected by waterborne diseases (diarrhea, typhoid, etc.) caused by water pollution. Around 90% of sewage in developing countries is discharged directly into water bodies without receiving adequate treatment. Changing climate patterns also represent a new water quality challenge, which translates into environmental, social and economic problems including the scarcity of water resources. We are now facing new challenges beyond the management of conventional regulated contaminants. We must also reduce nutrients (nitrogen and phosphorus) and manage a growing list of non-conventional unregulated contaminants, collectively termed contaminants of emerging concern such as pharmaceuticals, personal care products, pesticides, and industrial chemicals with unknown long-term impacts on human health and the environment. The 2030 Agenda for Sustainable Development calls for international action by setting Goal 6 on clean water and sanitation in response to the global concern over water-related issues. Such clear focus on water quality underlines the urgent need for addressing water and wastewater problems in innovative ways and substantially improves water quality, increases recycling and safe reuse, and reconsider new paradigms that focus on extracting valuable resources from wastewater to facilitate the transition to a circular economy. This will ultimately lead to a better design and management of urban infrastructure systems and create more sustainable cities and communities.

This Research Topic aims to focus on the circular economy for water and wastewater treatment and reclamation, impacts and removal of contaminants of emerging concern and nutrient removal. Other focuses of this Research Topic include resource recovery, sludge management and transformation, fate and transport of contaminants in the urban water cycle, and routes and mechanisms of contaminants removal using various biological and physicochemical methods. This Research Topic is particularly interested in articles based on state-of-the-art monitoring techniques, innovative treatment methods, and process modelling. In addition to the human health and environmental impact of contaminated waters as they represent a growing scientific and public concern. We also welcome articles that demonstrate advancement in scientific research, legal knowledge, and equity considerations in water and wastewater related issues in cities.

The topics of interest include but are not limited to the following:
• Contaminated waters and public health in cities
• Urban Water/wastewater quality monitoring and analytical advancements
• Wastewater treatment technologies under the circular economy
• Nutrient removal technologies and resource recovery under the circular economy
• Urban sludge management and transformation
• Fate and transport of pollutants in the urban water cycle
• Impacts and removal of contaminants of emerging concern
• Water scarcity, resource management, and water governance in cities


Keywords: Wastewater Treatment, Contaminants of Emerging Concern, Resource Recovery, Water Quality, Climate Change.


Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.

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Submission Deadlines

05 December 2021 Manuscript

Participating Journals

Manuscripts can be submitted to this Research Topic via the following journals:

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Topic Editors

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Submission Deadlines

05 December 2021 Manuscript

Participating Journals

Manuscripts can be submitted to this Research Topic via the following journals:

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