Effects of pristine and photoaged tire wear particles and their leachable additives on key nitrogen removal processes and nitrous oxide accumulation in estuarine sediments
Global estuaries and coastal regions, acting as critical interfaces for mitigating nitrogen flux to marine, concurrently contend with contamination from tire wear particles (TWPs). However, the effects of pristine and photoaged TWP (P-TWP and A-TWP) and their leachates (P-TWPL and A-TWPL) on key nitrogen removal processes in estuarine sediments remain unclear. This study explored the responses of denitrification rate, anammox rate, and nitrous oxide (N2O) accumulation to P-TWP, A-TWP, P-TWPL, and A-TWPL exposures in estuarine sediments, and assessed the potential biotoxic substances in TWPL. Results indicate that P-TWP inhibited the denitrification rate and increased N2O accumulation without significantly impacting the anammox rate. A-TWP intensified the denitrification rate inhibition by further reducing narG gene abundance and NAR activity, and also decreased the hzo gene abundance, HZO activity, and Candidatus Kuenenia abundance, thereby slowing the anammox rate. N2O accumulation was lower after A-TWP exposure than P-TWP, with the NIR/NOS and NOR/NOS activity ratios closely associated with N2O accumulation. Batch experiments indicated that photoaging promoted Zn release from TWPL, significantly contributing to the inhibited denitrification rate and increased N2O accumulation by TWP. In addition, TWP drives changes in microbial community structure through released additives, with the abundance of DNB and AnAOB closely linked to the Zn, Mn, and As concentrations in TWPL. This study offers insights into assessing the environmental risks of TWPs in estuarine ecosystems.
Code (0)
등록된 구현이 없습니다.
Similar Papers 제목 키워드 기반
Advanced Targeted Drug Delivery for Colon Cancer Using Pristine and Surface-modified Hydroxyapatite Nanoparticles: Synthesis, Characterization, and pH-Responsive Release
Hydroxyapatite nanoparticles (HANs) have emerged as a promising candidate for targeted drug delivery in the treatment of colon cancer, a disease that remains one of the leading causes of cancer-related deaths globally. I…
Segmentation overlapping wear particles with few labelled data and imbalance sample
Ferrograph image segmentation is of significance for obtaining features of wear particles. However, wear particles are usually overlapped in the form of debris chains, which makes challenges to segment wear debris. An ov…
Edge DetectionImage SegmentationSegmentationSemantic SegmentationVehicle Dynamics Control for Simultaneous Optimization of Tire Emissions and Performance in EVs
In recent years, Electric Vehicles (EVs) have seen widespread public adoption. While EVs produce zero tailpipe emissions, they contribute to an increase in another type of vehicular emission: tire emissions. Battery-oper…
Analysis of the Visually Detectable Wear Progress on Ball Screws
The actual progression of pitting on ball screw drive spindles is not well known since previous studies have only relied on the investigation of indirect wear effects (e. g. temperature, motor current, structure-borne no…
A Bi-fidelity DeepONet Approach for Modeling Uncertain and Degrading Hysteretic Systems
Nonlinear systems, such as with degrading hysteretic behavior, are often encountered in engineering applications. In addition, due to the ubiquitous presence of uncertainty and the modeling of such systems becomes increa…