INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Guolin Yang,Ling Wei,Xin Wang,Xudong Wu,Yizhou He,Guo Li,Tao Chen,Wenkun Zhu
The zero-valent iron (ZVI) has attracted increasing attention due to the enhanced reactivity of ZVI to uranium wastewater. However, ZVI practical application is hampered due to its susceptibility to oxidation and the formation of passivation layers during storage and in situ restoration. To address these issues, we used a biosulfuration approach to modify ZVI for application in uranium ore wastewater treatment. A series of physicochemical characterization tools and photoelectronic analyses showed that BS-ZVI considerably increased carrier separation efficiency and visible light absorption capacity, resulting in a significant photoassisted enhancement effect on uranium extraction. Accordingly, the uranium removal efficiency of BS-ZVI reached 91% within 60 min, and its maximum adsorption capacity was 336.3 mg/g. By analyzing the mechanism, the improved U(VI) removal performance was mostly responsible on the dissolution of the passivation layer on the surface of ZVI, the generation of Fe(II) and FeS, and the important role of Shewanella putrefaciens extracellular polymers (EPS). Overall, the BS-ZVI biohybrid merges with the high activity of ZVI, bio-FeS, and self-regeneration ability of bacteria, expanding a promising new approach for sustainable treatment of uranium mine wastewater.
研究领域:
环境科学
·
微生物学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2020
·
IF 4.192
Xiaojun He,Wei Xu,Feng Ding,Chuchu Xu,Yahui Li,Hong Chen,Jianliang Shen
In this work, a reaction-based ratiometric and colorimetric sensor was designed and synthesized for probing bisulfite (HSO3–) by coupling coumarin (CM) with barbituric (BA) moiety. Further tests have shown that CM–BA has high selectivity and sensitivity for the recognition of HSO3–, which can be applied for the detection of HSO3– in environmental and biological systems very effectively. The fluorescence intensity ratios (F462/F568) exhibited an outstanding HSO3–-dependent response with ultrafast response time (within 20 s) and a lower detection limit (105 nM). Meanwhile, the color of the CM–BA solution changed from green to colorless during the recognition process, and its fluorescence changed from green to blue. The mechanism of response is confirmed by the density functional theory (DFT) model. In summary, CM–BA has demonstrated low toxicity and good permeability, which can be applied for imaging HSO3– in cells and zebrafish safely and effectively. Besides, this novel sensor CM–BA successfully realized the quantification of the concentration of HSO3– in paper strips and food samples.
研究领域:
分析化学
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生物成像
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Dan Yuan,Shungang Wan,Yong Xiao,Lei Sun
This study involves the construction of an “inside-out” electronic network channel with in-situ formation of biogenic FeS (bio-FeS) nanoparticles in cells of Shewanella oneidensis MR-1 ( S . oneidensis MR-1) and a coating of conductive polypyrrole (PPy) on the outer surface of entire cells. The microbial fuel cell driven by bio-FeS and PPy co-modified S . oneidensis MR-1 (FeS/PPy@MR-1) has a maximum power density 3.6 times higher than that of the native strain. Electrochemical analysis demonstrates that the modifications of bio-FeS and PPy markedly enhance the direct electron transfer and c -type cytochrome-bound flavin-mediated single-electron reaction pathways and expand the electron output flux. The electron-donating ability of FeS/PPy@MR-1 is 7 times greater than that of the native strain. Bio-FeS and PPy can mediate novel intra/extracellular transmembrane electron transport pathways independent of the traditional respiratory chain, bridge spatially discrete redox environments, and optimize electron transfer pathways to intracellular to extracellular transfer electrons rapidly and maximally. These findings provide insights into conductive nanomaterial-mediated intra/extracellular transmembrane electron transfer, which is critical for the environment and bioenergy fields.
研究领域:
环境科学
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生物能源
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微生物学
✓ 已验证
DOI
高影响因子
WATER RESEARCH
·
2023
·
IF 12.8
Huimin Liu,Dejin Liu,Yuancai Chen
Considering the negligent degradation of sulfamethoxazole (SMX) by Citrobacter freundii JH , the incorporation of bio-FeS could initiate the SMX biodegradation to 0.0444 (S-FeS), and further to 0.0564 mg L −1 mg −1 protein d −1 (SN-FeS) when coexisted with nitrate. Electrochemical (LSV, I-t , DPV, EIS and EDC) and respiratory inhibition experiments clarified that the bio-FeS could greatly switch/redistribute electron transmembrane-transfer from intracellular to extracellular mainly via FDH/Hases-S-chain, as revealed by the significant increase of ipa- FDH/Hases / ipa- FC-Cyts and ipc- FDH/Hases / ipc- FC-Cyts (from 1.09 and 1.07 (SN-native) to 1.50 and 3.58 (SN-FeS)), while nitrate (linear fitting with NADH ( R 2 = 0.9903)) mainly intensified CoQ-L-chain related INET from Complex I to CoQ to compensate for the electronic competition with SMX. SN-FeS system detoxified the SMX on microbial metabolism (such as membrane rupture and oxidative stress induction) with high SOD activity (737.93 U g FW −1 ). Structural equation modeling indicated that bio-FeS up-regulated PMF-mediated ATP synthesis ( P PMF-ATPs from 0.12 (SN-native) to 0.74 (SN-FeS)) and PMF-mediated NADH ( P PMF-NADH from -0.72 (SN-native) to 0.63 (SN-FeS)), and the nitrate addition intensified this positive feedback. Overall, this study provides a new perspective for bionanoparticles via electron transfer/redistribution to detoxify and launch the antibiotics biodegradation in ecological environment.
研究领域:
环境生物学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale Advances
·
2023
·Vol. 5
·期 6
·1784-1794
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IF 4.7
Manli Lu,Xiaomeng Zhu,Haoming Sun,Huijuan Chen,Kaifeng Xue,Lulu Du,Liyuan Cui,Pinhua Zhang,Dongchao Wang,Guangliang Cui
2D heterostructure nanoarrays have emerged as a promising sensing material for rapid disease detection applications. In this study, a bio-H2S sensor based on Cu2O/Co3O4 nanoarrays was proposed, the controllable preparation of the nanoarrays being achieved by exploring the experimental parameters of the 2D electrodeposition in situ assembly process. The nanoarrays were designed as a multi-barrier system with strict periodicity and long-range order. Based on the interfacial conductance modulation and vulcanization reaction of Cu2O and Co3O4, the sensor exhibited superior sensitivity, selectivity, and stability to H2S in human blood. In addition, the sensor exhibited a reasonable response to 0.1 μmol L−1 Na2S solution, indicating that it had a low detection limit for practical applications. Moreover, first-principles calculations were performed to study changes in the heterointerface during the sensing process and the mechanism of rapid response of the sensor. This work demonstrated the reliability of Cu2O/Co3O4 nanoarrays applied in portable sensors for the rapid detection of bio-H2S.
研究领域:
生物传感技术
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材料科学
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医学检测
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）