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Removal of copper from cattle footbath wastewater with layered double hydroxide adsorbents as a route to antimicrobial resistance mitigation on dairy farms

Williams, Orla; Clark, Ian; Gomes, Rachel L.; Perehinec, Tania; Hobman, Jon L.; Stekel, Dov J.; Hyde, Robert; Dodds, Chris; Lester, Edward

Removal of copper from cattle footbath wastewater with layered double hydroxide adsorbents as a route to antimicrobial resistance mitigation on dairy farms Thumbnail


Authors

Ian Clark

RACHEL GOMES rachel.gomes@nottingham.ac.uk
Professor of Water & Resource Processing

Tania Perehinec

JON HOBMAN jon.hobman@nottingham.ac.uk
Associate Professor

DOV STEKEL DOV.STEKEL@NOTTINGHAM.AC.UK
Professor of Computational Biology

Robert Hyde

CHRIS DODDS CHRIS.DODDS@NOTTINGHAM.AC.UK
Professor of Process Engineering



Abstract

Copper and zinc are routinely used in livestock antimicrobial footbaths in commercial farming. The footbath mix is a cost to farmers, and the disposal of spent footbath into slurry tanks leads to soil contamination, as well as the potential for antimicrobial metal resistance and co-selection. This study assesses the potential to mitigate a source of antimicrobial metal resistance in slurry tanks while recovering copper and zinc from spent cattle footbaths. This is the first study in literature to investigate the potential of recovering copper from cattle footbath solutions via any method. The sorbent, Ca2Al-EDTA Layered Double Hydroxides (LDH), were used to remove Cu2+ from a Cu2SO4·5H20 solution at different temperatures. The maximum Cu2+ uptake from the Cu2SO4·5H20 solution was 568 ± 88 mg g−1. Faster and higher equilibrium uptake was achieved by increasing the temperature of the solution. The sorbent was found to be effective in removing copper and zinc from a commercially available cattle footbath solution (filtered footbath solution Cu2+ uptake 283 ± 11.05 mg g−1, Zn2+ uptake 60 ± 0.05 mg g−1). Thus, this study demonstrates the opportunity for a completely novel and potentially economically beneficial method of mitigating antimicrobial resistance in agriculture and the environment, while also providing a new valuable copper and zinc waste stream for secondary metal production.

Journal Article Type Article
Acceptance Date Nov 21, 2018
Online Publication Date Nov 22, 2018
Publication Date Mar 10, 2019
Deposit Date Nov 29, 2018
Publicly Available Date Jan 7, 2019
Journal Science of the Total Environment
Print ISSN 0048-9697
Electronic ISSN 1879-1026
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 655
Pages 1139-1149
DOI https://doi.org/10.1016/j.scitotenv.2018.11.330
Keywords Antimicrobial resistance (AMR); Slurry tank; cattle footbath; copper; layered double hydroxides (LDH); Metal sorption
Public URL https://nottingham-repository.worktribe.com/output/1339175
Publisher URL https://www.sciencedirect.com/science/article/pii/S0048969718346850?via%3Dihub

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