Publications by authors named "Pinpin Yang"
The significant influx of antibiotics into the environment represents ecological risks and threatens human health. Microbial degradation stands as a highly effective method for reducing antibiotic pollution. This study explored the potential of immobilized microbial consortia to efficiently degrade tetracycline.
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- Porous anodes enhance microbial electrochemical systems by providing a larger surface area for electroactive bacteria, leading to improved performance, especially with larger pore sizes.* -
- The study developed multilayer anodes with varying pore diameters to analyze how pore size and depth influence the performance and biofilm detection, revealing that larger pores yield higher power densities.* -
- Findings showed that electricigens can colonize deeper into larger pores, with the biofilm thickness and current output affected by pore depth, while Geobacter sp. was the dominant bacteria, contributing significantly to current production in outer biofilm layers.*
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- The study addresses the issue of limited electron donors in the denitrification process of oligotrophic groundwater, proposing a hybrid system combining a microbial electrolysis cell (MEC) with a hydrogen-based membrane biofilm reactor (MBfR) for more efficient treatment.
- This hybrid system effectively prevents pollution from organic waste while maximizing hydrogen use for denitrification reactions, leading to improved performance metrics like increased hydrogen proportion and current density.
- The experimental results show that this MCA-MBfR system achieved a 97.8% nitrate reduction in actual groundwater samples, with certain bacteria, including Thauera and Pannonibacter, playing significant roles in the denitrification process.
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- Natural biomass, such as cellulose, lignin, and hemicellulose, is identified as a cost-effective and abundant resource for creating efficient anodes in microbial electrochemical systems (MES).
- A sustainable method involving freeze-drying and carbonizing these materials yields a strong, cork-like electrode structure and achieves a record power density of 4780 ± 260 mW m for unmodified lignocellulose-based anodes.
- The resulting CLX material promotes the growth of electroactive biofilms and supports a high abundance of Geobacter, making it a promising candidate for optimal electrode performance and controllability.
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- Microbial electrochemical systems (MES) are innovative wastewater treatment technologies that convert organic pollutants into usable energy and require efficient anodes for their effectiveness.
- A novel 3D anode with millimeter-scale pores (3D-MPA) was created using a low-cost phenolic resin and PMMA template, enhancing microbial colonization and overall efficiency.
- The 3D-MPA-900 variant demonstrated the best performance due to its optimal surface structure, leading to increased power density and current density, making it a strong candidate for future commercial MES applications.*
Information about effects of conversion from rice fields to vegetable fields on denitrification process is still limited. In this study, denitrification rate and product ratio (i.e.
View Article and Find Full Text PDFIn microbial fuel cells (MFCs), the anode electrode is a core structure as the catalytic area of exoelectrogens. The anode material for large-scale MFCs needs excellent bioelectrochemical performance and low fabrication costs. Herein, carbonized phenolic foam with controllable porous structures was developed as the bio-capacitor of MFCs.
View Article and Find Full Text PDFEffects of antibiotics on the transformation of nitrate and the associated NO release in paddy fields are obscure. Using soil slurry experiments combined with N tracer techniques, the influence of tetracycline and sulfamethazine (applied alone and in combination) on the denitrification, anaerobic ammonium oxidation (anammox), dissimilatory nitrate reduction to ammonium (DNRA) and NO release rates in the paddy soil were investigated, while genes related to nitrate reduction and antibiotic resistance were quantified to explore the microbial mechanisms behind the antibiotics' effects. The potential rates of denitrification, anammox, and DNRA were significantly (p < 0.
View Article and Find Full Text PDFPrevious studies of long-term manure applications in paddy soil mostly focused on the effects on denitrification, occurrence of antibiotics and antibiotic resistance genes (ARGs) without considering the effects on anaerobic ammonium oxidation (anammox). Here, we investigated the potential rates of anammox and denitrification, occurrence of antibiotics and AGRs in response to three fertilization regimes (C, no fertilizer; N, mineral fertilizer; and NM, N plus pig manure) in six long-term paddy experiment sites across China. The potential rates of anammox (0.
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