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Aluminosilicate and zeolitic materials synthesis using alum sludge from water treatment plants: Challenges and perspectives

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Author(s):
Machado, Raquel Cardoso. ; Valle, Stella Fortuna do ; Sena, Thais Beatriz Miqueleti ; Perrony, Paul Esteban Pherez ; Bettiol, Wagner ; Ribeiro, Caue
Total Authors: 6
Document type: Journal article
Source: WASTE MANAGEMENT; v. 186, p. 15-pg., 2024-06-13.
Abstract

Alum sludge (AS) is a by-product generated from drinking water treatment and produced in large amounts around the world. Its chemical composition makes this waste an emerging alternative source of silicon and aluminum for aluminosilicates or zeolite material production, which can add value to residues and contribute to the circular economy process on a global scale. In this sense, and considering the scarcity of information about AS, this review shows data collection about AS in different countries, including generation, chemical composition, and disposal information. The reuse of AS is discussed based on circular economy and the environmental gains derived from such approaches are highlighted, including the possibility of utilization with other residues (e.g., ash, bioproducts, etc). Moreover, this review shows and discusses the benefits and challenges of AS reuse in the synthesis process and how it can be a sustainable raw material for aluminosilicates and zeolite synthesis. The most common conditions (conventional or non -conventional) in zeolite synthesis from AS are mentioned and advantages, limitations and trends are discussed. The discussions and data presented can improve the AS management and reuse legislations, which certainly will collaborate with sustainable AS use and circular economy processes. (AU)

FAPESP's process: 22/09773-1 - Development of fertilizer formulation from zeolitic concentrates obtained from WTP sludge and microorganisms
Grantee:Raquel Cardoso Machado
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 20/12210-3 - Development of technological alternatives for the use of ETA sludge as raw material for the production of controlled release fertilizers
Support Opportunities: Research Grants - Research Partnership for Technological Innovation - PITE
FAPESP's process: 23/02665-1 - Production of zeolitic concentrates from WTP sludge
Grantee:Thais Beatriz Miqueleti de Sena
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 23/01549-8 - Development of wet mechanochemical treatment for the use of WTP sludge as raw material for the production of controlled-release fertilizers
Grantee:Cauê Ribeiro de Oliveira
Support Opportunities: Regular Research Grants