Journal of Water Process Engineering
·
2025
·
IF 6.7
Junguo He,Yuanyi Zhao,Heliang Pang,Yili Wang,Lin Li,Yunlong Liu,Xinxin Cui,Tong Wei,Shengye Duan,Suiyin Yu
Sulfaquinoxaline sodium (SQ-Na), a veterinary sulfonamide antibiotic, poses potential risks to anaerobic digestion (AD) systems due to its antimicrobial properties, yet its impacts on methanogenic efficiency and microbial dynamics remain poorly understood. This study systematically evaluated the effects of SQ-Na (0–50 mg/L) on AD of simulated wastewater through batch experiments, integrating methane yield analysis, enzyme activity assays, 16S rRNA sequencing and metagenomic insights. Results demonstrated a dose-dependent inhibition of cumulative methane production, with 1 and 5 mg/L SQ-Na reducing yields to 41.21 % and 8.12 % of the control, respectively, while 20–50 mg/L caused near-complete stagnation. The modified Gompertz equation revealed prolonged lag phases (up to 53.52 % extension) and suppressed maximum methane production rates (Rmax). Function enzyme analyses indicated SQ-Na-induced adenosine triphosphatase (ATPase) inhibition (0.26–0.63–fold reduction) alongside accumulated Acetyl-CoA (A-CoA, 0.23–2.32 folds) and Coenzyme F 420 (F 420 , 0.48–2.52 folds), suggesting metabolic imbalance. Microbial shifts highlighted SQ-Na-driven suppression of acetoclastic methanogens (e.g., Methanosaeta ). Metagenomic evidence further pinpointed decreases in the abundance of methanogenesis-associated genes (e.g., EC 7.2.1.4, EC 2.8.4.1) and folate biosynthesis pathways, revealing an inhibition mechanism where SQ-Na competitively inhibits dihydropteroate synthase (EC 2.5.1.15), impairing the metabolic chain of energy, enzymes and function substances. This study offering critical data for optimizing SQ-Na-wastewater treatment and sustainable bioenergy recovery.
研究领域:
环境科学
·
微生物学
·
废水处理
·
生物能源
·
宏基因组学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Liyu Zheng,Sanyuan Hu,Heping Li,Youwei Yan
The fast development of optoelectronics makes a huge boost to the searching for flexible indium-free transparent conductors. In recent years, metal networks (currently are Au, Ag and Cu) have emerged as promising alternatives, however, facile fabrication of high-performance, chemically stable, and low-cost transparent conductor is still a big challenge. Here, ultra-long W microfibers (with conductivity of 4.3 × 10 4 S/cm) are successfully produced by draw spinning and further assembled into well-regulated patterns. Such a solution-processed patterning effectively eliminates the fiber-to-fiber joint resistance, and thus enables the W network to achieve an ultra-low sheet resistance of 0.2 Ω sq −1 at ~90% transparency, which corresponds to a high figure of merit σ dc /σ opt = 1.7 × 10 4 (up to 10–40 times the value of Cu and Au networks). Moreover, the W network possesses excellent anti-thermal and anti-corrosion properties, which enable it to work in the erosion solution with pH ranging from 1 to 13 with a restrained increase (<3%) in its sheet resistance. With a marvelous combination of high conductivity and transparency, high chemical stability and good mechanical flexibility, the ultrathin W fibers may open a new door to find flexible indium-free transparent conductors for the development of both flexible electronics and energy conversion.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Feng Xu,Wei Xu,Bingxin Mao,Wenfeng Shen,Yan Yu,Ruiqin Tan,Weijie Song
In this article, silver nanowires (AgNWs) with aspect ratios of 1000 and lengths up to 200 μm are obtained by a modified polyol approach. These very long AgNWs are then utilized to prepare transparent electrodes (TEs) displaying a transmittance of 91.3% at a sheet resistance of 8.6 ohm/sq without any post-treatment. Furthermore, we also demonstrate a process for the cold welding of Ag NWs by simply dipping the AgNWs films into CTAB solutions, resulting in a further improvement for the optoelectronic performance. After the post-treatment, the AgNW-based TEs can achieve a transmittance of 93% at a sheet resistance of 9.5 ohm/sq. In addition, the electric behaviors of AgNW-based TEs are investigated. In the bulk-like regime, for the as-prepared AgNW-based TEs, the Figure of merit (FOM), DC to optical conductivity ratio reaches up to 566.8. After the cold welding process, the DC to optical conductivity ratio can reach even higher values (631.6). In the percolative regime, the as-prepared and welded AgNW-based TEs can achieve Π (FOM with percolative-like behavior) values of 166.8 and 242.1, respectively.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2018
·Vol. 87
·期 1
·147-155
·
IF 1.745
Wang Yu,Chen Lianxi,Liu Zhenhui,Li Jie,Wang Pengpeng
The simple and effective synthesis of well-defined organosilica hollow nanospheres (OHNSs) for fundamental research and practical applications is still a significant challenge. In this work, a facile “cationic surfactant-induced selective etching” strategy was developed for the fabrication of hollow thiocyanatopropyl silsesquioxanes (thiocyanatopropyl-SQ), mercaptopropyl silsesquioxane (mercaptopropyl-SQ) from cyanoethyl-SQ@thiocyanatopropyl-SQ and cyanoethyl-SQ@mercaptopropyl-SQ, respectively. The experiments demonstrated that cetyltrimethylammonium bromide (CTAB) had remarkable influence on the formation of hollow structure and could accelerate the etching process significantly. A formation mechanism initiated by the adsorption of cationic surfactant followed by the etching of inner core with NH 3 ·H 2 O was proposed. Hollow thiocyanatopropyl-SQ and mercaptopropyl-SQ with various shell thickness could be prepared by manipulating the amount of CTAB. And large-scale OHNSs were obtained at appropriate concentration of CTAB through this strategy. Moreover, this strategy might be further extended to fabricate OHNSs with other worthy functional groups.
研究领域:
材料科学
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纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Lei Xu,Yuting Wang,Erqun Song,Yang Song
Polybrominated diphenyl ethers (PBDEs) are a category of brominated flame retardants , which were widely used in industrial products since the 1970 s. Our previous studies indicated quinone-type metabolites of PBDEs (PBDE-Qs) cause neurotoxicity, however, their inherent toxicological mechanism remains unclear. Here, we first synthesized PBDE-Qs and corresponding reduced hydroquinone homologous (PBDE-HQs) with different pattern of bromine substitution. Their nucleophilic and redox properties were investigated. PBDE-Qs react with reduced glutathione (GSH) via Michael addition and bromine displacement reaction, whilst PBDE-HQs lack the ability of reacting with GSH. Of note, the displacement reaction only occurs with bromine on the quinone ring of PBDE-Qs but not phenyl ring. Next, electron paramagnetic resonance (EPR) analysis revealed the generation of SQ •− , along with their downstream hydroxyl radical (HO ) and methyl radical ( CH 3 ) through a PBDE quinone/semiquinone/hydroquinone (Q/SQ •− /HQ) futile cycle. In addition, a structure-dependent cytotoxicity pattern was found, the exposure of PBDE-Q/HQ with bromine substitution on the quinone ring resulted in higher level of apoptosis and autophagy in BV2 cells. In conclusion, this work clearly demonstrated that the nucleophilic and redox properties of PBDE-Qs/HQs are responsible for their neurotoxicity, and this finding provide better understanding of neurotoxicity of PBDEs.
研究领域:
环境科学
·
毒理学
·
神经科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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