Sustainable Spent Pot Line Management Guidance

Nunez, Pernelle

doi:10.1007/978-3-030-36408-3_168

Cited by 3 publications

(2 citation statements)

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“…The major advantage of SPL revalorization for this industry is to decrease the environmental impact of primary aluminum by avoiding the SPL landfilling. Using SPL without pretreatment in cement plants as a raw material is a common practice in Europe, Asia, Australia, Brazil and the Middle East (Broek and Øye, 2018;Jawi et al, 2020;Nunez, 2020;Personnet, 1999). For example, EGA in the United Arab Emirates promotes the use of SPL without hydro or pyro pretreatment, enforcing crushing and sieving.…”

Section: Introductionmentioning

confidence: 99%

“…This allows to reduce the fossil fuels consumption up to 4% and reduce the overall CO2 emissions by 1%. However, the high sodium content limits the use of SPL in cement plants from 0.2% to 0.75% to avoid durability concerns in concrete due to the alkalis silica reactions (Broek and Øye, 2018;Gomes et al, 2005;Jawi et al, 2020;Nunez, 2020). In North America, this practice in raw cement meal is not allowed due to the high percentage of fluoride in SPL.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the reactivity of treated spent pot lining from primary aluminum production as cementitious materials

Brial

Tran

Sorelli

et al. 2021

Resources, Conservation and Recycling

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the reactivity of treated spent pot lining from primary aluminum production as cementitious materials

Brial

Tran

Sorelli

et al. 2021

Resources, Conservation and Recycling

View full text Add to dashboard Cite

Fluoride geochemistry in groundwater at regulated industrial sites

Fowler,

Goulding,

Law

2024

Water Environment Research

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Few studies apply geochemical concepts governing fluoride fate and transport in natural waters to geochemical conditions at contaminated industrial sites. This has negative implications for designing sampling and compliance monitoring programs and informing remediation decision‐making. We compiled geochemical data for 566 groundwater samples from industrial waste streams associated with elevated fluoride and that span a range of geochemical conditions, including alkaline spent potliner, near‐neutral pH coal combustion, and acidic gypsum stack impoundments. Like natural systems, elevated fluoride (hundreds to thousands of ppm) exists at the pH extremes and is generally tens of ppm at near‐neutral pH conditions. Geochemical models identify pH‐dependent fluoride complexation at low pH and carbonate stability at high pH as dominant processes controlling fluoride mobility. Limitations in available thermochemical, kinetic rate, and adsorption/desorption data and lack of complete analyses present uncertainties in quantitative models used to assess fluoride mobility at industrial sites.Practitioner Points Geochemical fundamentals of fluoride fate and transport in groundwater are communicated for environmental practitioners. Fluoride is a reactive constituent in groundwater, and factors that govern attenuation are identified. Geochemical models are useful for identifying fluoride attenuation processes, but quantitative use is limited by thermodynamic data uncertainties.

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