Publications by authors named "Mengyang You"
Ionic surfactants may impact removal efficiency of organic contaminants from aqueous solution, but research regarding the adsorption mechanisms on surfactant-modified carbon nanotubes (CNTs) was limited. In this study, three multi-walled and one single-walled CNTs were used as adsorbents to investigate the adsorption behavior and mechanisms of ciprofloxacin (CIP) on CNTs modified by ionic surfactants (cationic CTAB (Cetyltrimethylamnonium bromide) or anionic SDS (Sodium dodecyl sulfate)). More than 80% (82-88%) of the total removed CIP on CTAB-modified CNTs occurred within the first 6 h, much higher than that on SDS-modified CNTs (57-78%).
View Article and Find Full Text PDFBackground: Soil organic carbon (SOC) is fundamental for mitigating climate change as well as improving soil fertility. Databases of SOC obtained from soil surveys in 1981 and 2011 were used to assess SOC change (0-20 cm) in croplands of Heilongjiang Province in northeast China. Three counties (Lindian, Hailun and Baoqing) were selected as typical croplands representing major soil types and land use types in the region.
View Article and Find Full Text PDFArticle Synopsis
- A field study in northeast China assessed how long-term use of organic and chemical fertilizers affects nitrous oxide (N2O) emissions from Mollisols during maize growth in 2011.
- Cumulative N2O emissions significantly increased by 66-86% when higher amounts of maize straw and pig manure were combined with NPK fertilizer, but NPK alone showed no significant effect.
- Soil temperature influenced most of the seasonal variation in N2O emissions, explaining 38-96% of the flux, suggesting that the type of organic amendment plays a key role in emissions, with a capped emission threshold despite higher nitrogen inputs.