Mechanistic insights into oxychar’ s role in mitigating ammonia volatilization from fertilised alkaline soils

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 979, P. 179502 - 179502

Published: April 27, 2025

Mitigating ammonia (NH3) volatilization from fertilised alkaline soils is crucial for promoting environmental sustainability and safeguarding public health. In this study, "oxychar" was prepared an agricultural waste via a low-temperature partial-oxidation (LTPO) process under oxygen-sufficient environment. The optimum modification temperature 220 °C duration of 3 h, yielding maximum NH3 uptake 76.4 mg/g by oxychar. enhanced adsorption capacity stability are attributed to the increased surface oxygen-containing functional groups (OCFGs) that act as sites, well presence ultra-micropores facilitate effective trapping. When applying optimised oxychar 21-day incubation studies, it found cumulative reduced 76.3 %-91.6 % with application rates 1 %-3 %, compared urea treatments. Soil property microbial community analyses further indicate promotes hydrolysis reduction nitrate ammonium dissimilation (DNRA) processes while inhibiting nitrification modulating communities, resulting in higher lower levels soil treatment. However, enriched cannot volatilize freely due chemisorption ionic covalent bonds, respectively. Introducing could be promising approach mitigate ensure food security sustainability.

Language: Английский

Multi-faceted effects and mechanisms of granular activated carbon to enhance anaerobic ammonium oxidation (anammox) for nitrogen removal from wastewater

Bioresource Technology, Journal Year: 2024, Volume and Issue: 418, P. 132001 - 132001

Published: Dec. 18, 2024

Language: Английский