ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Minling Gao,Huizhen Deng,Youming Dong,Weiwen Qiu,Zhengguo Song
This study investigated the effects of the antidepressant sertraline hydrochloride (Ser-HCI) on rice physiology when combined with arsenic (III) and cadmium. Hydroponic experiments revealed that combined lower concentrations (0.2 and 0.6 mg L -1 ) of Ser-HCl and As (III) or Cd increased rice biomass and reduced pH and low molecular weight organic acids. The fluorescence intensity was enhanced with Ser-HCl and As-only treatments, with a significant difference ( p < 0.05) in the dissolved organic matter index. There was a decrease in endophyte-specific operational taxonomic units, with proteobacteria dominating the rice root endophytes. The addition of Ser-HCl resulted in a 535% increase in the Verrucomicrobiota , which was positively correlated with malic acid and negatively correlated with pH. Functional annotation highlighted alterations in carbohydrate metabolism pathways. This study provides insights into the interactive effects of Ser-HCl on rice when combined with As (III) and Cd, addressing gaps in our understanding of the impact of antidepressants on plant systems.
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Nano Energy
·
2025
·
IF 17.1
Zeshuang Kong,Dafeng Zhang,Junchang Liu,Xue-Yang Ji,Peiqing Cai,Xipeng Pu,Huayang Zhang
In the S-scheme heterojunction, photogenerated electrons from the oxidation photocatalyst recombine with holes from the reduction photocatalyst, enhancing redox potential and boosting photocatalytic activity. However, the recombination mechanism at these interfaces remains largely unexplored. In this study, we design a Cd 0.9 Zn 0.1 S/ZnWO 4 (CZS/ZWO) S-scheme heterojunction model guided by theoretical predictions. Remarkably, a nano-tetrapod-shaped CZS/ZWO S-scheme heterojunction is synthesized via a simple solvothermal and ultrasonic self-assembly method, achieving hydrogen evolution performance under visible light irradiation for 3 h that is 3.69 times higher than CZS alone and 4.63 times higher than ZWO alone. Further theoretical calculations simulate the charge transfer mechanism, electron density localization, and transition states in the photocatalytic hydrogen evolution reaction. Finally, integrating theoretical and experimental data, an S-Zn channel is proposed within the CZS/ZWO S-scheme heterojunction, clarifying the electron transfer pathway. This study provides a detailed understanding of charge transfer dynamics in S-scheme heterojunction.
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Journal of Cleaner Production
·
2024
·
IF 9.7
Faisal Islam,Muhammad Saad Shoaib Khan,Sulaiman Ahmed,Aziz Ul Ikram,Fakhir Hannan,Mehmood Jan,Muhammad Sajid,Ali Ahmed Zaky Shoaib,Shan Liu,Jian Chen
The utilization of nanotechnology based ameliorative strategies has emerged as an effective method to reduce the potential toxicity of environmental stressors on crops. However, there is limited information available regarding the interaction of silica-coated iron oxide nanocomposite (Fe 3 O 4 @SiO 2 , NCs) with plants under abiotic stress. Therefore, the objective of this study was to investigate the effects of different doses of silica-coated iron oxide nanocomposite (NCs) (25/50 mg Kg -1 ) in mitigating Cd phytotoxicity in rice. The results revealed that Cd-contaminated soil (30 mg Kg -1 ) inhibited plant growth, reduced physiological attributes, and induced ultrastructural changes in stressed plants. The presence of Cd in the soil also reduced rhizospheric soil pH and soil enzyme activities while increased Cd bioavailability and its uptake in plants. However, the foliar application of silica coated iron oxide NCs stimulated plant biomass production, chlorophyll biosynthesis, and antioxidant capacity. The application of NCs significantly decreased the activities of lipid peroxidation markers (MDA, EL and LOX) and reduced levels of reactive oxygen species (ROS) accumulation ( • OH, O 2 ·− and H 2 O 2 ) in stressed plants. Additionally, NCs application influenced Cd accumulation in different tissues, potentially through modifying chemical profile of root exudates (amino/organic acids), which facilitated Cd precipitation through chelation and its sequestration in vacuoles via modulating the expression of metal transporters. Furthermore, the application of NCs indirectly regulated Cd fractionation, solubility, mobility and Cd enrichment in the rhizosphere. This study demonstrates the effective mitigation of Cd toxicity in rice plants by applying silica-coated iron oxide NCs. The results provide valuable insights into nanotechnology-based approaches for improving plant stress tolerance and offer promising strategies for sustainable agricultural practices.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Zengting Niu,Guotong Sun,Mingtao Tan,Shanchun Yan,Dun Jiang
Heavy metals are prevalent environmental contaminants in pest habitats. This study investigates the tolerance of Hyphantria cunea larvae to β-cypermethrin under cadmium (Cd) stress. Exposure to Cd markedly enhanced larval tolerance to β-cypermethrin. The P450 enzyme was found to be crucial in triggering this cross-tolerance. Notably, Cd exposure significantly upregulated the expression of HcCYP333A29 and HcCYP6AE184 both before and after β-cypermethrin treatment. Silencing these genes reduced the β-cypermethrin tolerance in Cd-exposed larvae. Furthermore, overexpression of HcCYP333A29 and HcCYP6AE184 significantly improved the tolerance of Sf9 cells and Drosophila to β-cypermethrin. Silencing of HcDicer-1, a key gene in the miRNA synthesis pathway, significantly diminished the β-cypermethrin tolerance in Cd-treated larvae. The miR-2739 controlled overexpression of HcCYP333A29, while miR-2854 controlled HcCYP6AE184 overexpression, both of which were essential for β-cypermethrin cross-tolerance in H. cunea larvae under Cd exposure. Collectively, Cd exposure induces cross-tolerance to β-cypermethrin in H. cunea larvae through miRNA-mediated post-transcriptional regulation.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-8
·
IF 14.7
Wang Xingzhi,Gao Yan,Liu Xiaonan,Xu Huaiyu,Liu Ruixiang,Song Jiaojiao,Li Bo,Shen Huaibin,Fan Fengjia
High-energy exciton emission could allow single-component multi-colour display or white light-emitting diodes. However, the thermal relaxation of high-energy excitons is much faster than the photon emission of them, making them non-emissive. Here, we report quantum dots with light hole-heavy hole splitting exhibiting strong high-energy exciton electroluminescence from high-lying light holes, opening a gate for high-performance multi-colour light sources. The high-energy electroluminescence can reach 44.5% of the band-edge heavy-hole exciton emission at an electron flux density Φ e of 0.71 × 10 19 s −1 cm −2 − 600 times lower than the photon flux density Φ p (4.3 × 10 21 s −1 cm −2 ) required for the similar ratio. Our simulation and experimental results suggest that the oscillator strength of heavy holes reduces more than that of light holes under electric fields. We attribute this as the main reason for strong light-hole electroluminescence. We observe this phenomenon in both Cd x Zn 1-x Se-ZnS and CdSe-CdS core-shell quantum dots exhibiting large light hole-heavy hole splittings.
研究领域:
材料科学
·
光电技术
·
纳米技术
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Inorganic and Nano-Metal Chemistry
·
2021
·
IF 1.716
Weiqiang Xu,KaiKai Hu,Shouwen Jin,Yuting Zhang,Daqi Wang
Transition metal carboxylates with O- and N-donor ligands are interesting for their structural features. Seven novel isonicotinamide(inic)-based metal complexes of [Cd(inic)2(L1)2(H2O)2] · 2H2O (1) (L1 = 2-chloronicotinate), [Cd(inic)2(L2)2(H2O)2] (2) (L2 = 2,4-dichlorobenzoate), [Cu(inic)2(L3)2] (3) (L3 = 4-chlorophenoxyacetate), [Cu3(inic)6(L4)2(HL4)2(H2O)2] · 2H2O (4) (L4 = azelate), [Zn(inic)2(L1)2(H2O)2] · (inic) · H2O (5), [Zn(inic)(L5)(H2O)4] (6) (L5 = 3-nitrophthalate) and [Zn2(inic)2(L6)2] · 5H2O (7) (L6 = 1,4-cyclohexanedicarboxylate) have been obtained by the introduction of the carboxylates by the common solution method and are structurally featured by different techniques of EA, IR spectra, TG and SCXRD analysis. The X-ray studies told that these complexes display mononuclear to trinuclear structures with octahedral/square-pyramidal geometry around the Zn2+, trigonal bipyramidal/octahedral at the Cu2+ and octahedral for the Cd2+. The inic in 1–7 are coordinated only in monodentate fashion with its ring N, while 5 has the lattice inic. The carboxylates coordinated to the metal in monodentate, chelating bidentate and bridging bidentate fashions. The pair of complementary N-H···O H-bonds from the CONH2 of the inic were found in all compounds except 7. Except 1 and 2, all other compounds bear the CH-O contacts from the pyridine CH of the inic. The intricate intra- and intermolecular classical H-bonds, CH-N, CH-O, CH-Cl, CH2-O, O-N, O-O, Cl-O, Cl-Cl, CH-π, CH2-π, C-π, N-π, Cl-π and π-π associations are elucidated by the X-ray crystallographic studies, which push the discrete complexes into high-dimensional ordered supramolecular structures.
研究领域:
化学
·
材料科学
·
晶体学
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BIOLOGICAL TRACE ELEMENT RESEARCH
·
2021
·Vol. 200
·期 3
·1408-1417
·
IF 3.738
Liu Peng,Xiao Weiwei,Wang Kai,Yang Zhaoguang,Wang Lin
Rice and rice products are the main sources of Cd contamination in humans. The total and bioaccessible concentrations of Cd and three divalent nutrients, Mn, Cu, and Zn, in locally grown rice grains from Hunan and Guangdong Provinces in China were investigated. An in vitro physiologically based extraction test method was introduced to evaluate the bioaccessibility of the target metals in the rice grains. The mean concentrations of Cd in the rice grains were 0.245 mg/kg and 0.235 mg/kg from Hunan and Guangdong Provinces, respectively. Large variations were observed in the Cd concentrations, indicating a heterogeneous distribution of Cd contamination throughout the study areas. The bioaccessibility of Cd, Mn, and Zn in the gastrointestinal fractions was significantly lower than that in the gastric fractions. In contrast, the bioaccessibility of Cu at the intestinal phase was detected in the rice grains from both provinces. The correlation analysis showed significant relationships between total Cd concentrations and bioaccessible Cd fractions, indicating that higher total Cd in rice grains always resulted in higher bioaccessible Cd. Consistent correlations in the rice grains were observed between Zn and Mn. However, a lack of correlation was found between Cd and Zn in the current study. Risk assessment according to bioaccessible Cd would significantly reduce the exposure risk to Cd from rice consumption.
研究领域:
环境科学
·
食品安全
·
毒理学
·
营养学
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Mengzhu Li,Yanqing Wang,Zhiping Fang,Dongchen Guo,Min Fan,Hui Dai,Fuling Guo,Wangchao Chen,Chengwu Shi,Peng Cui
Antimony selenosulfide (Sb 2 (S,Se) 3 ) demonstrates strong potential for thin-film solar cells owing to its tunable bandgap, low toxicity, and high stability. However, conventional fabrication methods often yield films with small grain sizes and random orientations, which hinder device performance. Herein, an in situ polymerization-assisted grain growth (iPAGG) strategy was developed, specifically enabling the oriented growth of Sb 2 (S,Se) 3 on Cd-free TiO 2 substrates, by introducing acrylic acid (AA) into the chemical bath deposition process. The carboxylate groups from AA coordinate with Sb 3+ ions, promoting oriented growth of Sb 2 (S,Se) 3 film. This approach yields films with enlarged grains, reduced defect densities, and strengthened [ hk 1] preferred orientation. As a result, Cd-free Sb 2 (S,Se) 3 solar cells employing the optimized AA concentration yielded a champion power conversion efficiency (PCE) of 7.24%, outperforming the control device (6.70%). Further interfacial modification with poly (acrylic acid)-modified SnO 2 boosts the PCE to 7.55%. This work offers an effective way toward the fabrication of high-performance and environmentally friendly Sb 2 (S,Se) 3 photovoltaics.
研究领域:
材料科学
·
光伏技术
·
纳米结构制备
·
表面化学
·
半导体物理
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Weimin Wan,Ziqi Li,Xi Wang,Fei Tian,Jian Yang
Improving the biocompatibility and water dispersibility of hydroxyapatite (HAP) is an effective way to expand its application in biomedicine. Here, we present a nanosystem (HAP-β-CD-HPG) that is constructed by riboflavin sodium phosphate (HE) functionalized hydroxyapatite (HAP) and hyperbranched β-cyclodextrin (β-CD-HPG) through a simple, mild and rapid approach. Firstly, the successful construction of HAP-β-CD-HPG nanosystem is confirmed by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and so on. Next, Doxorubicin (DOX) is loaded onto HAP-β-CD-HPG with a high encapsulation potency (60.3%) and further use for the simultaneously cell-imaging and controlled release of the cytotoxic drug DOX. Furthermore, the pH-triggered DOX release process in A549 cancer cells can be visualized dynamically by tracking the fluorescence of HAP-β-CD-HPG and DOX. This work both provides a new protocol for the construction of dual-function nanosystem for imaging of cell cytoplasm and drug delivery via a simple approach and promotes a potential application of this diagnosis-therapy integrated system for cancer treatment in the future.
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Hua Yu,Meng Hu,Zhen Hu,Fei Liu,Haizhong Yu,Qiaomei Yang,Hairong Gao,Chengbao Xu,Meiling Wang,Guifen Zhang,Yun Wang,Tao Xia,Liangcai Peng,Yanting Wang
Pectin is a minor wall polysaccharide with potential applications for bioproducts . Despite the application of specific plants and biomass-based sorbents for environmental remediation, little has been reported about characteristic roles of pectin. Using the natural rice mutant ( Osfc16 ) treated with Cd , this study explored that pectin could predominately enhance Cd accumulation with lignocellulose, mainly due to remarkably raised uronic acids deposition. The Cd-treatment further reduced lignocellulose recalcitrance for significantly enhanced biomass saccharification and bioethanol production along with almost complete Cd release. Using all remaining fermentation rice residues that are of typical ribbon-structure and large surface, this study generated novel biosorbents by optimal chemical oxidation with the pectin extraction from citrus peels, and examined consistently raised Cd and methylene blue (MB) adsorption capacities. Therefore, this work has proposed a mechanism model about multiple pectin enrichment roles for Cd and MB removals in agricultural and industry locations with full lignocellulose utilization towards bioethanol production.
研究领域:
环境科学
·
生物技术
·
农业科学
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 17
·1000
·
IF 3.5
Yan Shiying,Zhang Jian,Liu Yimeng,Chen Yiping,Jiang Tianlan,Gao Yu,Zhang Jie,Gao Jingqi,Li Fosheng,Zhao Jian,Feng Su
This study presents a composite biosorbent, Nano-Fe—SA—XB, synthesized by immobilizing a consortium of Shewanella putrefaciens and Serratia sp. B16 (XB) within a sodium alginate (SA) matrix reinforced with Nano-Fe 3 O 4 (Nano-Fe). A preliminary orthogonal formulation screening identified 4% Nano-Fe, 4% SA, 30 g/L XB biomass, and 4 h crosslinking as the selected preparation condition. At pH 7, using a wet dosage of 0.6 g (equivalent to a calculated dry mass of ~ 0.03 g), Nano-Fe—SA—XB achieved an 80.51% removal efficiency at a 20 mg/L initial Cd(II) concentration. Normalized to dry weight, the experimental maximum adsorption capacity was 72.5 mg/g at 150 mg/L, while the Langmuir-estimated capacity reached 87.8 mg/g. Kinetic and isotherm fitting suggested that Cd(II) uptake was consistent with pseudo-second-order kinetics and Sips/Langmuir-type adsorption behavior. SEM–EDS and FTIR analyses suggested that Cd(II) removal was associated with surface complexation and ion-exchange interactions involving hydroxyl, amide/carboxyl, phosphate, and calcium-containing sites. XRD showed no detectable new crystalline Cd-containing precipitates after adsorption. The material also showed NaCl-regeneration potential and 30-day Cd(II) retention/release stability. Overall, Nano-Fe—SA—XB shows potential as a reusable biosorbent for Cd(II)-contaminated water, while further mechanical, thermodynamic, surface-charge, pore-structure, magnetic, and chemical-state characterization is still needed. Graphical
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JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 3.9
Jiangtao Guo,Hongxiang Ou,Wenqian Zhou,Honglai Xue,Fang Zhu,Weikang Liu
In this work, a core–shell flame retardant (MF@β-CD) was prepared by coating β-cyclodextrin (β-CD) with melamine-formaldehyde (MF) resin through in situ polymerization. Amino-functionalized attapulgite (ATP-NH 2 ) was also prepared via silane modification. MF@β-CD and ATP-NH 2 were incorporated with piperazine pyrophosphate (PAPP) to fabricate flame-retardant PP composites through melt blending. The incorporation of MF@β-CD and ATP-NH 2 improved the fire performance and thermal stability of PP composites. The PP composite containing the MF@β-CD/ATP-NH 2 system exhibited a limiting oxygen index (LOI) of 33.8% and achieved a UL-94 V-0 rating. Compared with neat PP, the peak heat release rate and total smoke production decreased by 91.9% and 87.7%, respectively. Thermal analysis and char characterization suggested that the MF@β-CD/ATP-NH 2 system promoted the formation of a more continuous and stable char layer during combustion. The MF shell contributed to improved interfacial compatibility between β-CD and the PP matrix, while ATP-NH 2 helped maintain the integrity of the char structure. This work provides a feasible approach for improving the fire safety and condensed-phase stability of PP using bio-based flame-retardant components. Graphical Core–shell structured MF@β-CD was prepared via in situ polymerization and combined with amino-modified attapulgite (ATP-NH 2 ) and piperazine pyrophosphate (PAPP) to synergistically modify polypropylene (PP). The optimized composite achieved a limiting oxygen index (LOI) of 33.8% and a UL-94 V-0 rating. The incorporation of ATP-NH 2 resulted in a distinct lamellar stacking structure on the char residue surface, with the layered silicate sheets of ATP-NH 2 uniformly embedded in the organic char matrix. This enhanced the structural stability and thermal shock resistance of the char layer, preventing its cracking and peeling during high-temperature combustion.
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