Tracing the transboundary transport of atmospheric Particulate Bound Mercury driven by the East Asian monsoon.

Taking Beijing-Tianjin-Hebei (BTH) with severe atmospheric mercury (Hg) and PM pollution as a typical region, this study clarified the characteristics and transboundary transport of atmospheric Particulate Bound Mercury (PBM) affected by the East Asian monsoon. Five sampling sites were conducted in rural, suburban, urban, industrial, and coastal areas of BTH from northwest to southeast along the East Asian monsoon direction. PBM showed increasing concentrations from northwest to southeast and negative δHg values, indicating significant contributions from anthropogenic sources.

Restriction of biosolids returning to land: Fate of antibiotic resistance genes in soils after long-term biosolids application.

Although the utilization of biosolids in agricultural lands is widely considered as an effective way to improve resource reuse, the presence of antibiotic resistance genes (ARGs) severely restricts biosolids returning to fields. A 12-year long-term experiment with different biosolids application rates (from 0 to 36 t ha yr) was conducted to study the effect of biosolids application on shaping ARGs in soil. Biosolids application significantly increased ARGs abundance in the soil, except for MBS treatment (9 t ha yr biosolids application).

How long-term excessive manure application affects soil phosphorous species and risk of phosphorous loss in fluvo-aquic soil.

The excessive application of manure has caused a high load of phosphorus (P) in the North China Plain. Having an understanding of how manure application affects soil P changes and its transport between different soil layers is crucial to reasonably apply manure P and reduce the associated loss. Based on our 28-year field experiments, the compositions and changes of P species and the risk of P loss under excessive manure treatments were investigated, i.