The application of freezing technology for zinc removal from Faro pit mine-impacted water, Yukon, Canada

Popugaeva, Daria; Allen, Ethan; Corriveau, Matt; Govindaraj, Sruthee; Kreyman, Konstantin; Ray, Ajay K.

doi:10.1016/j.coldregions.2023.103922

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…The physicochemical properties of the mine-impacted water are shown in Table 1. The water has circum-neutral pH and is characterized by elevated zinc concentrations that are up to almost 25-30 times above the e uent quality standard of 0.5 mg/L (The Government of Canada 2022; Popugaeva et al 2023). This is one of the primary concerns for limiting the impact on sensitive receiving environments in the study area.…”

Section: Study Areamentioning

confidence: 99%

“…It was reported based on laboratory tests and eld data that freezing technology Is capable of effectively removing several impurities from wastewater and mine-impacted water including metals and heavy metals, such as nickel, cobalt, manganese, chromium, and others (Hasan and Louhi-Kultanen 2016; Melak et al 2016;Wijewardena 2018;Popugaeva et al 2021Popugaeva et al , 2023Tongshuai et al 2022). Among cryopuri cation cons there is a concentrated solution (brine), a by-product of the cryopuri cation process, that could harm the environment due to its high contaminant concentration.…”

Section: Introductionmentioning

confidence: 99%

“…The initial temperature of Faro Mine water was maintained at 10 ± 1 ˚C. The ice fraction (amount of water converted into ice during the experiments) of approximately 35% was used for each experiment, as an optimal ice fraction percentage for cryopuri cation experiments(Popugaeva et al 2023).…”

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confidence: 99%

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Cryopurification and microbial fuel cell process as a combined approach to treat mine-impacted water

Allen,

Popugaeva,

Munoz-Cupa

et al. 2024

Preprint

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In the current study, a water treatment approach integrating freezing technology, so-called cryopurification, and microbial fuel cell (MFC) process is proposed and tested towards zinc removal. Contaminated water samples used for laboratory experiments were received from the Faro Mine site, Yukon, Canada. Through cryopurification, the effect of freezing temperature, mixing and the direction of ice front propagation on zinc removal from the Faro mine water was investigated and quantitively analyzed. The MFC was used to treat a post-cryopurification brine, both at a laboratory scale. When the coolant temperature ranged from − 5 to − 1 ̊C and 180 rpm solution mixing was used, up to 80–95% of zinc was removed after a single freezing cycle. The results of laboratory experiments demonstrated that zinc concentrations in mine water can be reduced by cryopurification to 0.5 mg/L (effluent quality standard) under optimal experimental conditions. The MFC process was run for 120 h to test the capacity of the microorganism (Shewanella oneidensis) towards zinc removal from the brine concentrated by freezing. Based on the results of laboratory experiments, MFC showed a reliable and high zinc removal up to 90–93% with Shewanella oneidensis incubated in the anode. The MFC generated a power density and open-circuit voltage with a maximum result of 8.8 mW/m2 and 168.5 mV, respectively.

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Section: Study Areamentioning

confidence: 99%