Reuse of UK alum water treatment sludge in cement-based materials

Shamaki, Mubarak; Adu-Amankwah, Samuel; Black, Leon

doi:10.1016/j.conbuildmat.2020.122047

Cited by 26 publications

(6 citation statements)

References 49 publications

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Section: Resultssupporting

confidence: 77%

“…The amorphous nature of the WTS is due to the high aluminum hydroxide Al(OH) 3 used as a coagulant for water treatment. The amorphous nature Al(OH) 3 in WTS has also been reported by Shamaki et al 29 The lithomargic clay consisted of mainly kaolinite with a minor fraction of gibbsite which justifies the high levels of Al 2 O 3 and SiO 2 F I G U R E 3 X-ray diffractogram of water treatment sludge (WTS), lithomargic, and kaolin powders present in the chemical analysis. The kaolin clay also consisted of quartz with a minor fraction of kaolinite, which indicates the relatively high level of SiO 2 in the chemical analysis.…”

Section: Characterization Of Soil Samplessupporting

confidence: 67%

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Fabrication of porous mullite‐based ceramic bricks from Al‐rich water treatment sludge and kaolinitic‐based clay

Darkwa

Andrews

Darko

et al. 2023

Int J Applied Ceramic Tech

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A large quantity of water treatment sludge (WTS) is generated yearly from Ghana's Weija water treatment plant. The sludge contains some heavy metals and other toxic chemicals, which must be managed to minimize environmental impact. In the current work, WTS was mixed with varying quantities of kaolinitic-based clays (kaolin and lithomargic clays) to produce porous mullitebased bricks. The bricks were fired at 1200 • C for 1 h, and their properties were determined. Lithomargic clay-based mixtures had less dimensional variation and were suitable to produce near-net shape bricks compared to WTS-based bricks. The addition of WTS increased the linear firing shrinkage and apparent porosity whilst decreasing bulk density and compressive strength. Porous mullite-based bricks fabricated from lithomargic clay exhibited high compressive strength (6.3 MPa) at 10 wt.% WTS addition. The highest apparent porosity of 27% was attained at 40 wt.% WTS addition with compressive strength of 5.1 MPa and thermal conductivity of .5 W/m K.

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Section: Resultssupporting

confidence: 77%

Section: Characterization Of Soil Samplessupporting

confidence: 67%

Fabrication of porous mullite‐based ceramic bricks from Al‐rich water treatment sludge and kaolinitic‐based clay

Darkwa

Andrews

Darko

et al. 2023

Int J Applied Ceramic Tech

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“…Alum sludge, generally comprised of clay minerals, could be dehydroxylated if heated in the range of 700-850 °C (Tony 2020b). Moreover, the raw waterworks sludge is primarily aluminum-based material with an amorphous aluminum hydroxide precipitate with minimal quantities of crystalline quartz and montmorillonite (Shamaki et al 2021). The resultant materials are a reactive alumina and silica.…”

Section: Cement-based Materialsmentioning

confidence: 99%

“…Therefore, such materials enhance the pozzolanic reactions when it is supplied to cement improving it characteristics that are related to strength and durability (Fernandez et al 2011). Thus, calcined alum sludge samples might be signified as a pozzolan since the temperature of calcination has a major influence on the pozzolanic activity (Shamaki et al 2021). Thus, in cement industry such sludge comprised in past a resultant alite hydration is enhanced since the undersulfated C 3 A reactions are prevented; hence, the cement performance is superior.…”

Section: Cement-based Materialsmentioning

confidence: 99%

Valorization of undervalued aluminum-based waterworks sludge waste for the science of “The 5 Rs’ criteria”

Tony

2022

Appl Water Sci

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Alum sludge (AS) is an underrated by-product waste resulted from treating raw water through conventional water treatment plants. Water is attained from various reservoirs such as rivers and aquifers, and it may contain a wide variety of contaminants as drinking water processing systems produce “waste” sludge as a residual material that causes significant environmental issues. Hence, numerous efforts aimed to sustainable reuses of such sludge. This article illustrates the beneficial reuses of the aluminum-based sludge to close the loop between the sludge waste generation and the sustainable environment with providing past, current and updated knowledge with the introduced uses with their advantages and challenges. Alum sludge as a resource not as a “waste” for reuse facilities is considered a value-added alternative for management achieving the legislation requirements and proposing “end-of-waste” concept. 5Rs, including “Reduce, Reprocess, Reuse, Recycle and Recover,” are providing sustainable solution to fulfill present and future aspects for green environment and safe sludge disposal. In this regard, now, it is essential to focus and adopt the 5Rs criteria for the concept of circular economy that replaces the “end-of-life” principal with restoration.

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“…Therefore, surface water is still an important source of freshwater. HOLANDA, 2004;TEIXEIRA et al, 2011), cement (CHEN;DAI, 2010;GODOY et al, 2019GODOY et al, , 2020GOMES et al, 2020;HE et al, 2021;SHAMAKI;ADU-AMANKWAH;BLACK, 2021), asphalt (SILVA, 2008) and brick manufacturing (CABRAL, 2013), concrete blocks and non-structural mortar (LI et al, 2021;LIU et al, 2020b;SOUZA, 2009), commercial soil, composting, crop of citrus fruits and culture of commercial grass (BABATUNDE; ZHAO, 2007;MEGDA;ACHON, 2005), for remediation of contaminated sites (HOVSEPYAN; BONZONGO, 2009;SARKAR et al, 2007;SOUZA et al, 2019), oil recovery (MANSOUR; ABDEL-SHAFY; EL AZAB, 2020), improvement of soil (BAǦRIAÇIK; GÜNER, 2020), etc. Also, calcined WTS has been investigated (ANDRADE et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Methodology to evaluate the behavior of water treatment sludge and other pasty waste as sustainable geomaterial: rheological and geotechnical approaches.

Tsugawa¹

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A special thank you to my husband, Fernando Fonterrada, for his love and constant support during our entire life. Without him, anything would be a waste of time. To my kids, Yasmim and Kaike, I say: I love you! Thank you for all happiness you have given me.A great honor to be the daughter of my parents, Elza and Julio Tsugawa. Thank you for your strength and resilience.Many thanks to Professor Dr. Rafael Giuliano Pileggi for opening his laboratory to me. The experiments were an essential and innovative part of the research. Thank you for the classes and discussions; they were helpful and clarifying. Also, I recognize Dr. Roberto Cesar de Oliveira Romano for his countless availability throughout all investigations. I am grateful for the sincerity and friendship of Professor Dr. Krishna Reddy from the University of Illinois at Chicago (UIC). Thank you for welcoming me to your laboratory. The time in Chicago was unforgettable and fundamental for my research. Thanks to Prof. Paulo Scarano Hemsi from the Aeronautics Institute of Technology (ITA), who has collaborated with the research group since my master's dissertation. To the technicians, Mr. Antonio Heitzman and Mrs. Valdineia dos Santos Silva, my admiration and respect. Thank you for the moments at the Laboratory of Soil Mechanics Milton Vargas (LMS). All of them I will bring with me forever. Prof. Sérgio Cirelli Ângulo, thank you for your didactic, knowledge, and availability for the conversations about sampling. The organizing method you have taught in the innovation classes was crucial for my thesis structuring. Wandrea Dantas, I am grateful for your tireless dedication to the graduate students. Without your work, nothing could be done, and fewer students would reach their dreams. Renata Monte, thank you for the opportunity to work together. I hope for another chance in the future. Rosangela Alves, many thanks for your support. Without you, my internship at the UIC could not have been done. Thanks for all undergraduate and graduate students who helped me to perform the experimental program during the research:

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Reuse of UK alum water treatment sludge in cement-based materials

Cited by 26 publications

References 49 publications

Fabrication of porous mullite‐based ceramic bricks from Al‐rich water treatment sludge and kaolinitic‐based clay

Fabrication of porous mullite‐based ceramic bricks from Al‐rich water treatment sludge and kaolinitic‐based clay

Valorization of undervalued aluminum-based waterworks sludge waste for the science of “The 5 Rs’ criteria”

Methodology to evaluate the behavior of water treatment sludge and other pasty waste as sustainable geomaterial: rheological and geotechnical approaches.

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