Investigation of ferrous iron-involved anaerobic denitrification in three subtropical soils of southern China

Han, Jiangpei; Shi, Liangsheng; Wang, Yakun; Chen, Zhuowei; Xu, Jianming

doi:10.1007/s11368-018-1971-x

Cited by 8 publications

(3 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the steep growth of human population, a rampant industrialization and intensive agricultural practices, nitrate (NO3 -) contamination of freshwater reservoirs is becoming a serious global concern, with significant impacts on the environment and on human health (Su et al, 2018b;Liu et al, 2018a). Nitrate pollution is mainly due to the runoff of nitrogen-containing fertilizers and the discharge of improperly treated industrial and domestic wastewaters (Chen et al, 2014;Han et al, 2018). In particular, mining activities are heavily responsible of nitrate release due to the extensive use of ammonium nitrate fuel oil (ANFO) explosives, which contaminates process water together with several heavy metal species, including iron in the form of Fe(II) (Papirio et al, 2014).…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Evaluation of Fe(II)-driven autotrophic denitrification in packed-bed reactors at different nitrate loading rates

Kiskira

Papirio

Péchaud³

et al. 2020

Process Safety and Environmental Protection

View full text Add to dashboard Cite

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

show abstract

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Evaluation of Fe(II)-driven autotrophic denitrification in packed-bed reactors at different nitrate loading rates

Kiskira

Papirio

Péchaud³

et al. 2020

Process Safety and Environmental Protection

View full text Add to dashboard Cite

show abstract

“…The former one is a process that needs organic substrates as the electron donor to reduce nitrate, while the latter one is an autotrophic process that the nitrate is degraded by sulfate, ferrous iron, or other inorganic matters [10]. Autotrophic denitrification seems more autonomous than heterotrophic process because there is no need of an external organic carbon source [11,12]. In a number of autotrophic denitrification reactants, ferrous iron is an important electron donor in the paddy soil.…”

Section: Introductionmentioning

confidence: 99%

“…Mejia et al [19] found that nitrate reduction driven by ferrous iron is an important process in the biogeochemical cycles of nitrogen, not only in anoxic environment but also in aerobic subsurface environment. Han et al [12] proved a positive relationship between the denitrification process and ferrous iron oxidation in the paddy soil of rich iron content. However, ferrous iron, as a donation of electron, does not always promote denitrification.…”

Section: Introductionmentioning

confidence: 99%

Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils

Yu-shuai

Han

et al. 2021

Water

Self Cite

View full text Add to dashboard Cite

Soil moisture status has an important effect on the process of denitrification in paddy soils. However, it is unclear how it affects the ferrous iron-involved denitrification. Here, the influence of drying-rewetting cycles on ferrous iron-involved denitrification in paddy soil were studied with batch experiments. The dynamics of nitrate, ammonia, Fe2+, Fe3+ and total organic carbon (TOC), as well as nitrous oxide (N2O) were investigated using the iron-rich paddy soil in Jiangxi province, South China. Results demonstrated that the denitrification rate dropped while ammonia nitrogen content (NH4+-N) showed a rapid accumulation in the drying period. In the rewetting period, organic carbon played two-side roles. Organic carbon and ferrous iron together provided electron donors to denitrification, and organic carbon simultaneously reduced ferric iron under anaerobic environment. There were complex interactions among organic carbon, nitrate and Fe2+/Fe3+ under drying-rewetting cycles. Soil rewetting led to denitrification flush, especially after a moderately long drying period, while excessively frequent drying-rewetting alternation was not favorable to nitrate denitrification.

show abstract

Partitioning denitrification pathways in N2O emissions from re-flooded dry paddy soils

Tang,

Minasny,

McBratney

2024

Biogeochemistry

View full text Add to dashboard Cite

In flooded paddy fields, peak greenhouse gas nitrous oxide (N2O) emission after rewetting the dry soils is widely recognised. However, the relative contribution of biotic and abiotic factors to this emission remains uncertain. In this study, we used the isotope technique (δ18O and δ15NSP) and molecular-based microbial analysis in an anoxic incubation experiment to evaluate the contributions of bacterial, fungal, and chemical denitrification to N2O emissions. We collected eight representative paddy soils across southern China for an incubation experiment. Results show that during the 10-day incubation period, the net N2O emissions were mainly produced by fungal denitrification, which accounted for 58–77% in six of the eight investigated flooded paddy soils. In contrast, bacterial denitrification contributed 6–15% of the net N2O emissions. Moreover, around 11–35% of the total N2O emissions were derived from chemical denitrification in all soil types. Variation partitioning analysis (VPA) and principal component analysis (PCA) demonstrated that initial soil organic carbon (OC) concentrations were the primary regulator of N2O source patterns. Soils with relatively lower OC concentration (7–15 mg g−1) tend to be dominated by fungal denitrification, which accounted for the net N2O production at the end of the incubation period. Overall, these findings highlight the dominance of the fungal denitrification pathway for N2O production in flooded paddy soils, which predominates in soils with relatively lower OC content. This suggests that fungal contribution should be considered when optimizing agricultural management system timing to control N2O emissions in flooded paddy soil ecosystems, and for the relevant establishment of predictive numerical models in the future.

show abstract

Investigation of ferrous iron-involved anaerobic denitrification in three subtropical soils of southern China

Cited by 8 publications

References 63 publications

Evaluation of Fe(II)-driven autotrophic denitrification in packed-bed reactors at different nitrate loading rates

Evaluation of Fe(II)-driven autotrophic denitrification in packed-bed reactors at different nitrate loading rates

Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils

Partitioning denitrification pathways in N2O emissions from re-flooded dry paddy soils

Contact Info

Product

Resources

About