Publications by authors named "Zongfu Cheng"
Returning raw straw to the soil can significantly elevate soil methylmercury (MeHg) and crop mercury (Hg) levels, underscoring the need to investigate safer approaches to straw utilization in mercury-contaminated regions. In this study, rice straw underwent anaerobic fermentation with the addition of sulfate, and the resulting fermentation products were utilized in a pot experiment involving water spinach to assess the impact of anaerobically fermented straw return on soil Hg methylation and its bioaccumulation. Findings revealed that the addition of sulfate during straw fermentation markedly increased the fermentation degree of the products, and sulfate was converted into organic sulfur-containing ligands that can functionalize the fermentation residuals.
View Article and Find Full Text PDFEffects of Composted Agricultural Organic Materials on Mercury Methylation in Paddy Soil and Mercury Enrichment in Rice.
Bull Environ Contam Toxicol
January 2023
Article Synopsis
- - Many studies indicate that using fresh straw in fields can lead to higher mercury levels in crops, prompting the need for better methods to use organic materials in mercury-contaminated soils.
- - This study involved pot experiments with different organic amendments (fresh rice straw, composted rice straw, cow dung, and composted cow dung) to assess their effects on mercury levels in paddy fields.
- - The results showed that composted materials decreased the amount of dissolved organic matter while increasing certain soil properties, leading to higher mercury release, but rice plants did not absorb the increased mercury, suggesting that composted organic materials are better at minimizing mercury accumulation in rice.