CHEMOSPHERE
·
2024
·
IF 8.1
Lu Wang,Jingjing Miao,Min Ding,Wei Zhang,Luqing Pan
Nonylphenol (NP) contamination in the coastal environment of China poses ecological risks to aquatic organisms. However, the endocrine disruptive impacts of NP on bivalves, particularly on ovarian development, remain poorly understood. In this study, Manila clams Ruditapes philippinarum at the developing stage of gonad were exposed to 1.0 μg/L NP for 21 days. Utilizing RNA interference (RNAi) to suppress ER gene expression, we observed a delay in ovarian development as evidenced by histological observations under both NP and NPRi (NP with ER-RNAi) treatment, with Vtg elevation exclusive to the NP group. Comprehensive analyses encompassing transcriptomics, real-time quantitative PCR, and steroid hormone measurement revealed significant alterations in aldosterone synthesis, estrogen signaling, and thyroid hormone synthesis. These pathways showed similar perturbations in both NP and NPRi groups compared to controls. Notably, the NPRi group exhibited distinct enrichment in PPAR and insulin signaling pathways, may implicating these in ER function suppression. Steroid hormone biosynthesis was notably reduced in both treatments, pointing to a profound impact on hormone synthesis. The contrast between in vivo and in vitro findings suggests that NP's detrimental effects on ovarian development may primarily involve neuroendocrine regulation of steroidogenesis. This investigation highlights the complex dynamics of NP-induced endocrine disruption in bivalves, emphasizing the pivotal role of ER and associated pathways.
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CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Yue Cao,Qiao Wang,Wei Zhou,Xiaolin Chang,Yuan Wang,Xuncong Gong
In this paper, the method of dehydration condensation reaction was used to establish a superhydrophobic cement mortar surface with the contact angle of 159.3° and the slide angle of 6.1° by using organosilane and inorganic nanomaterials . The nanoparticles built roughness and the silane provided low surface energy, which in combination achieved self-cleaning, waterproof and durability improvement. The superhydrophobic coating with good penetration depth is able to show superhydrophobicity after simply brushing and curing at room temperature for 24 hours and maintain hydrophobicity after surface abrasion. A variety of liquid droplets can roll freely from the surface of superhydrophobic cement mortar and carry contaminants rolling down to show self-cleaning performance. In terms of durability, the coating appears good adhesion to the surface of cement mortar, which retained its hydrophobic property after tape-peeling tests and outdoor simulation tests. In addition, compared with ordinary cement mortar, the superhydrophobic cement mortar demonstrates excellent waterproof ability and freeze-thaw resistance through low water absorption and slow quality reduction after multiple freeze-thaw cycles. These key characteristics provide advantages for concrete protection applications in harsh environments.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
·
IF 6.2
Xianbin Su,Teng Li,Xiaowen Zhu,Peihua Zheng,Huakang Pan,Hui Guo
Nonylphenol (NP) is one of the common pollutants in the environment that have toxic effects on aquatic animals. Nevertheless, little is known about the possible toxicity mechanism of NP on the hepatopancreas of Litopenaeus vannamei . In the present study, the detrimental effects of NP on the hepatopancreas of the L. vannamei were explored at the histological and transcriptomic levels. The findings indicated that after NP exposed for 3, 12, and 48 h, the hepatopancreas histology was changed significantly. Transcriptomic analysis showed that a total of 4302, 3651, and 4830 differentially expressed genes (DEGs) were identified at 3, 12, and 48 h following NP exposure. All these DEGs were classified into 12 clusters according to the expression patterns at different time points. GO and KEGG enrichment analyses of DEGs were also performed, immunological, metabolic, and inflammatory related pathways, including arachidonic acid metabolism (ko00590), the PPAR signaling pathway (ko03320), and the regulation of TRP channels by inflammatory mediators (ko04750) were significantly enriched. Six DEGs were selected for validation by quantitative real-time PCR (qRT-PCR) and the results confirmed the reliability of transcriptome data. All results indicated that NP is toxic to L. vannamei by damaging the histopathological structure and disrupting the biological function. The findings would provide a theoretical framework for lowering or limiting the detrimental impacts of NP on aquaculture and help us to further study the molecular toxicity of NP in crustaceans.
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2025
·
IF 3.2
Yao Shuaikang,Zhao Jingkun,Shao Guolin,Gao Siyu,Zhai Shangru,Xiao Zuoyi,Zhang Feng
The development of a catalyst with high catalytic activity and selectivity remains a crucial challenge in the field of heterogeneous catalysis. In this work, we demonstrated a versatile procedure for the immobilization of ultrafine and monodispersed metal nanoparticles onto glutaraldehyde-crosslinked polyethyleneimine-modified calcium alginate (GLA-PEI/Ca-SA) beads. The resulting hydrogel beads underwent comprehensive characterization through scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The results revealed that well-dispersed Ag, Cu, and Ni nanoparticles, with a mean size of 3.5, 2.6, and 4.1 nm, respectively, were successfully loaded onto the surface of GLA-PEI/Ca-SA beads with porous fiber network structure. Notably, the Ag/GLA-PEI/Ca-SA exhibited outstanding catalytic activity and stability, achieving over 95% conversion within 7 successive cycles towards the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by NaBH 4 in aqueous solution. Particularly, the Cu/GLA-PEI/Ca-SA beads displayed the highest catalytic activity for the reduction of 4-NP with a kinetic reaction rate constant of 1.56 × 10 −2 s −1 . We expect that this work will provide a novel and effective strategy to design highly efficient catalysts across various catalytic reactions. Graphical Ultrafine and monodispersed Ag nanoparticles within 5 nm on GLA-PEI/Ca-SA beads with high catalytic activity for rapid 4-NP reduction.
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CHEMOSPHERE
·
2024
·
IF 8.1
Demin Li,Zhaoyang Wang,Qianqian Ding,Hong Sun,Shuai Fang,Kangyi Zhang,Wenyi Hu,Jin Bian
Dissolved organic matter (DOM) has a complex composition, which can interact with various pollutants and affect the removal of pollutants. Therefore, a thorough understanding of the interaction between the encccvironmental hormone nonylphenol (NP) and DOM is crucial for environmental impact and development. In this study, the interaction was investigated by means of excitation emission matrix (EEM) fluorescence spectroscopy, UV–Vis spectroscopy, FT-IR spectroscopy, nuclear magnetic resonance (NMR) and complex model analysis. The interaction between different MW DOM and NP was verified by the spectral characterization data. According to the characterization analysis, the main components of DOM in water samples were proteinoid (C1, C2, C4) with MW < 1 k Da, and their binding capacity (log K a value) and binding site number ( n ) showed the maximum values (3.37, 3.24, 3.26; 0.81, 1.22, 0.52). For the humus like substance (C3) with larger molecular weight, the log K a value and the number of binding points n increased with increasing molecular weight, and the maximum values were 3.13 and 0.31, respectively. It can be seen that low molecular weight proteins have strong binding ability and binding sites with NP, and high molecular weight humus also have strong binding ability. Overall, the interaction between DOM and NP has molecular weight dependence and heterogeneity. The purpose of this study is to deeply understand the interaction characteristics of different MW DOM with NP, and to provide theoretical support and reference for the study of the removal effects of NP pollutants.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Xiaohui Lu,Yanjun Li,Hongyu Zhou,Siyu Li,Wei Wei,Guochun Lv,Gang Yang,Shihuai Deng,Bo Lai,Jiali Peng
Recently, many reagents have been introduced to accelerate the formation of highly reactive intermediate Mn species from permanganate (KMnO 4 ), thereby improving the oxidation activity of KMnO 4 towards pollutants. However, most studies have mainly focused on sulfur-containing reducing agents (e.g., bisulfite and sodium sulfite), with little attention paid to nitrogen-containing reducing agents. This study found that hydroxylamine (HA) and hydroxylamine derivatives (HAs) can facilitate KMnO 4 in pollutant removal. Taking sulfamethoxazole (SMX) as a target contaminant, the effect of pH, SMX concentration, KMnO 4 and HA dosages, and the molar ratio of HA and KMnO 4 on the degradation of SMX in the KMnO 4 /HA process was systematically investigated. Quenching experiments and probe analysis revealed MnO 2 -catalyzed KMnO 4 oxidation, Mn(III) and reactive nitrogen species as the primary active species responsible for SMX oxidation in the KMnO 4 /HA system. Proposed transformation pathways of SMX in the KMnO 4 /HA system mainly involve hydroxylation and cleavage reactions. The KMnO 4 /HA system was more conducive to selective oxidation of SMX, 2,4-dichlorophenol, and several other pollutants, but reluctant to bisphenol S (BPS). Overall, this study proposed an effective system for eliminating pollutants, while providing mechanistic insight into HA-driven KMnO 4 activation for environmental remediation.
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CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Qiao-Ling Mo,Rui Xiong,Jun-Hao Dong,Bai-Sheng Sa,Jing-Ying Zheng,Qing Chen,Yue Wu,Fang-Xing Xiao
ABSTRACT Solid non-conjugated polymers have long been regarded as insulators due to deficiency of delocalized π electrons along the molecular chain framework. Up to date, origin of insulating polymer regulated charge transfer has not yet been uncovered. In this work, we unleash the root origin of charge transport capability of insulating polymer in photocatalysis. We ascertain that insulating polymer plays crucial roles in fine tuning of electronic structure of transition metal chalcogenides (TMCs), which mainly include altering surface electron density of TMCs for accelerating charge transport kinetics, triggering the generation of defect over TMCs for prolonging carrier lifetime, and acting as hole-trapping mediator for retarding charge recombination. These synergistic roles contribute to the charge transfer of insulating polymer. Our work opens a new vista of utilizing solid insulating polymers for maneuvering charge transfer toward solar energy conversion.
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MATERIALS LETTERS
·
2025
·
IF 2.7
Yuyan Li,Lijie Zhang,Zhikang Rong,Zhigang Jia
Organic contaminant has detrimental influence on aquatic life and humankind through water circulation. In this work, Ag coated melamine sponge (Ag-P@MS) has been successfully prepared by facile, one-step and in-situ deposition method with the assistance of polyvinyl alcohol (PVA). Methylene blue and congo red as the representative of dyes and 4-nitrophenol as the typical of nitrophenol contaminants are employed to evaluate the catalytic performance of the as-prepared Ag-P@MS. The as-prepared MS composite (Ag-P@MS(6.5)) in the nearly neutral condition demonstrates better catalytic property than that of Ag-P@MS(10.5), and the apparent rate constants for Ag-P@MS(6.5) degradation of MB, CR and 4-NP are 0.01356 s −1 , 0.00886 s −1 and 0.00465 s −1 , respectively. The present work presents a novel approach for the preparation of Ag carrying monolith catalysts based melamine sponge and the potential practical application prospect due to their excellent catalytic performance for organic pollutant.
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INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Xinyu Guo,Chuchu Chen,Huan Jiao,Wenjuan Wu,Yongcan Jin,Zhiqiang Liang,Bo Jiang
Lignin-based carbon materials constructed by additive manufacturing are at the forefront for energy and environment research due to the abundant carbon element, low-cost, and sustainable features of lignin. Yet the uncontrollable rheological behavior and rigid structure often lead to lignin being used as an additive and the amount is very low, impeding its efficient application. Herein, we developed a low-cost direct ink writing strategy to fabricate 3D scaffolds with high lignin content (over 80 %). The printed filaments display excellent self-supporting capacity and keep intact even subjected to carbonization. As a proof of concept, the branches-leaves-inspired Pd/TiO 2 hierarchical photocatalyst was further decorated on the carbonized scaffolds for efficient catalytic reduction of 4-nitrophenol. Combined the controllable macro- and micro-structure of the scaffolds, the high light harvesting ability and specific surface area of Pd/TiO 2 hierarchical structure, the carbon-based catalyst demonstrates outstanding photocatalytic reduction activity to 4-nitrophenol, with the turnover frequency value up to 8.73 min −1 , much higher than most other carbon-based catalysts. The developed carbon-based hierarchical photocatalyst also shows good catalytic stability and reusability. This facile and scalable high content lignin 3D printing technique opens a new avenue to fabricate lignin-based carbon materials for widespread applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xianghan Cheng,Yalin Liu,Man Yang,Xiaoli Wang,Aili Wang,Zhen Li,Zhongmin Liu,Yong-Zheng Zhang,Xiuling Zhang,Da-Shuai Zhang,Shujuan Zhuang,Longlong Geng
Developing metal oxide catalysts with comparable activity to precious metals has become a hot but challenging area of research for wastewater purification. Herein, CoO x particles and nitrogen co-doped carbon with a hierarchical structure were designed and synthesized via a temperature-controlled pyrolysis strategy using inert Co-based metal–organic frameworks (Co-MOFs) as precursors. Unlike traditional methods, the exquisite pyrolysis of the Co-MOF at 400 °C enabling the CoO x particles with an average diameter of 6.8 nm to uniformly disperse, thus facilitating the formation of the optimized CoO x /CN-400 composite. Benefiting from the unique morphology and composition, CoO x /CN-400 exhibited improved redox property and exceptional activity for the reduction of nitrophenol to form the corresponding aminophenol compounds. The complete conversion of 4-nitrophenol over CoO x /CN-400 requires only 35 min with a rate constant of 0.12 min −1 , which is significantly higher than that of most non-noble metal catalysts and approaching some of the noble metal-based catalysts. Furthermore, leveraging the embedded CoO x particles, CoO x /CN-400 maintains its high catalytic efficiency even after six successive cycles, demonstrates an outstanding long-term catalytic capability and reusability. Finally, the mechanisms of 4-NP reduction have been hypothesized based on the combination of characterization and DTF calculations.
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JOURNAL OF CHROMATOGRAPHY A
·
2012
·
IF 4.531
Shuchao Wu,Bingcheng Yang,Lingling Xi,Yan Zhu
The current study describes the determination of phenols using ion chromatography–online electrochemical derivatization–fluorescence detection (IC/ED/FD). Six model phenols including 4-methylphenol (pMP), 2, 4-dimethylphenol (DMP), 4-tert-butylphenol (TBP), 4-hydroxylphenolacetic acid (pHPA), 4-acetamidophenol (pAAP), and phenol (P) were well separated on an anion-exchange column under ion exchange mode using NaOH with small amount of acetonitrile added as eluent. Online electrochemical derivatization performed via a laboratory-made electrolytic cell (EC), consisting of porous titanium electrode and cation-exchange membrane (CEM), allows the oxidation products that are strongly fluorescent to be detected by the fluorescence detector. NaOH eluent used in the present method matches well with the maximal fluorescence intensity obtained at alkaline condition for oxidized phenols, thus the addition of specific buffer solution after oxidation encountered in previous report could be eliminated. This process leads to a simplified procedure. The proposed method was sensitive to the limits of detection in the range of 0.4 μg/L and 3.8 μg/L and the limits of quantification between 1.2 μg/L and 13 μg/L due to the strong electro-oxidation capacity of porous titanium electrode, as well as the implementation of time-programmed potential over EC. The linear ranges were 2.0–1.0 × 10 4 μg/L for pAAP and DMP, and 10–1.0 × 10 4 μg/L for P, pMP, pHPA, and TBP, respectively. The relative standard deviations range from 0.9% to 4.8%. The utilization of the method was demonstrated by the analysis of real samples. The average spiked recoveries of target analytes in pool water were 81.0–118%.
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MICROCHIMICA ACTA
·
2010
·Vol. 169
·期 1
·87-92
·
IF 2.648
Yin Huanshun,Zhou Yunlei,Ai Shiyun,Liu Xianggang,Zhu Lusheng,Lu Linan
A glassy carbon electrode was modified with hydroxyapatite nanopowder (HA-NP) and characterized in terms of electrochemical oxidation of 4-nitrophenol (4-NP) via cyclic voltammetry, differential pulse voltammetry, chronoamperometry, and chronocoulumetry. The oxidation peak current of 4-NP at the modified electrode was increased (compared to the bare GCE), thus indicating that the HA-NP exhibits a remarkable enhancement effect on the electrochemical oxidation of 4-NP. The effects of loading with HA-NP, pH value, scan rate and accumulation time were examined. The oxidation peak current of 4-NP is proportional to its concentration in the range from 1.0 μM to 300 μM, with a correlation coefficient of 0.9996. The detection limit is 0.6 μM (at an S/N = 3). The method is simple, selective and sensitive. It was successfully applied to the determination of 4-NP in water samples, with recoveries ranging from 96% to 104%.
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