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“Low dissolved oxygen, high nitrite accumulation, change in optimal pH or temperature, fluctuation in C/N ratio, short solid retention time and non-availability of Cu ions were responsible for higher N2O leakage.”
“ Nitrous oxide emissions were higher (p ≤ 0.01) in + Cu soil as compared with the control, and increased with increasing Cu concentration in soil.”
“The results indicate that the effects of heavy metal contamination (specifically Cu contamination) can increase N2O emissions, but this can be effectively mitigated through increasing soil pH, also decreasing potential toxic effects on soil microorganisms.”
Journal of environmental management • 2019 | View Paper
“In this study, nitrous oxide N2O ) production during biological nutrient removal (BNR) from municipal wastewater was reported to be remarkably reduced by controlling copper ion (Cu2+) concentration.”