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In situ groundwater remediation alternatives for resilient urban environments

Grant number: 22/11892-9
Support Opportunities:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): December 01, 2022
Effective date (End): September 30, 2026
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Principal Investigator:Ricardo César Aoki Hirata
Grantee:Elizabeth Estefanía Naranjo Garófalo
Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:20/15434-0 - SACRE: integrated water solutions for resilient cities, AP.TEM

Abstract

Urban development contaminates aquifers, which are generally not monitored or treated adequadely. Aquifers such as Bauru and Guarani have water-degradation problems associated with non-point sources, mainly nitrate loads from urban sewage and agricultural and industrial activities. The treatment of such diffuse contamination sources has received recent attention due to the long-term impacts on human health and the ecosystem. Thus, policies and management strategies reduce the sources of contamination, but the results can take decades to be perceived. Therefore, in situ remediation technologies are implemented to reduce contamination and increase the resilience of urban environments. Permeable Reactive Barriers (PRB) are the most common in situ remediation alternative due to the low cost of operation and maintenance. This direct DSc project will develop integrated strategies for groundwater remediation applicable to the urban environment that are flexible, sustainable, resilient, and capable of treating various conventional and emerging contaminants. In addition, locally available and low-cost materials will be used, and strategies in which potential waste can be reused will be privileged. The following activities are planned: a) collection and evaluation of existing hydrogeochemical data; b) collection of additional data from the drilling of monitoring wells; c) evaluation of prioritization strategies; d) establishment of remediation objectives; e) conceptualization of remediation alternatives; and f) field and experimental laboratory evaluation of remediation and optimization alternatives. Thus, the results will contribute to proposing strategies to protect groundwater resources and increase the resilience of urban environments. Furthermore, it should be noted that this research is part of a thematic project funded by FAPESP 2020/15434-0, "SACRE|Integrated water solutions for resilient cities." (AU)

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