ENVIRONMENTAL RESEARCH
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2022
·
IF 8.431
Heming Wang,Jidong Liu,Cheng Gui,Qi Yan,Luchuan Wang,Shenghan Wang,Juanjuan Li
The soil remediation by microbial fuel cells (MFCs) is still challenging due to the high mass transfer resistance limiting the overall performance. To improve the remediation of Cr(VI) contaminated soil, iron-loaded activated carbon (AC-Fe) particles were synthesized and spiked into soil to establish an enhanced MFC system . The AC-Fe particles are porous and conductive with a high specific surface area of 1166.5 m 2 /g. The addition of AC-Fe particles could reduce the overall resistance from 4269.2 Ω to 303.1 Ω with the optimum dosage of 0.3%. The maximum power generation of MFC was 11.5 mW/m 2 , and Cr(VI) removal efficiency reached as high as 84.2 ± 1.2% in 24 h. It was found that AC-Fe particles were able to simultaneously adsorb and reduce Cr(VI) to Cr(III); in the meantime, Fe(II) loaded on the AC-Fe was oxidized to Fe(III). Spiking more AC-Fe particles in the contaminated soil had a negative effect. It was probably because that AC-Fe particles working as the third electrodes would hinder the overall ion electromigration and decrease Cr(VI) reduction at the cathode. The enhanced system which coupled MFC and AC-Fe showed a synergistic removal of Cr(VI), with the maximum improvement of 22.1% compared to the sum of Cr(VI) removals by the individual ones.
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高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2026
·Vol. 103
·期 11
·103167
·
IF 3.4
Yu Zhang,Pengpeng Ding,Min Liu,Lifen Meng
Rapid and ultrasensitive detection of heavy-metal ions in aquatic environments is critical for ecological integrity and public health, however, achieving cost-effective and highly selective green fluorescent probes remains challenging. This work delivers notable novelty through a one-step nitrogen self-doping without extra nitrogen sources, dual sensing-antioxidant functionality, and superior detection limits (LOD) compared with homologous cabbage-based materials. A one-step hydrothermal approach was developed to synthesize nitrogen-doped carbon quantum dots (PC-CQDs) in situ, using purple cabbage as both carbon and nitrogen precursors. Structural, surface chemical, and optical properties were comprehensively characterized by TEM, XPS, XRD, FTIR, and fluorescence spectroscopy. PC-CQDs exhibit a pronounced and selective fluorescence response toward Cr(VI) with negligible interference from competing metal ions, and achieve a lower LOD compared with homologous cabbage-derived CQDs. Under optimized conditions, the Cr(VI) detection limit is 3.00 μg/L. In tap water, mineral water, and river water, spiked recoveries range from 97.00% to 100.50%. Additionally, PC-CQDs demonstrate strong scavenging activity toward hydroxyl and DPPH radicals, with a DPPH IC 50 of 0.37 mg/mL, indicating notable antioxidant potential—this dual sensing-antioxidant functionality is a key novelty of the work. Purple cabbage serves as a sustainable biomass precursor for the green synthesis of high-performance PC-CQDs, enabling a robust fluorescent sensing platform for rapid heavy-metal monitoring in complex environmental water matrices, together with antioxidant applications. The one-step N self-doping strategy without external nitrogen sources, combined with dual sensing-antioxidant function and superior LOD relative to cabbage-based counterparts, underscores the novelty and practical potential of this approach. Download: Download high-res image (360KB) Download: Download full-size image
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
·
IF 4.4
Zeng Fanen,Xu Bing,Jing Chenglong,He Xiaodong,Li Chunyang,Li Guojun
High-entropy oxides (HEOs) have attracted considerable attention for energy storage applications because of their multi-principal synergistic effects and excellent structural stability. In this study, polyethylene glycol (PEG) was used as a surfactant to synthesize (CrMnFeCoNi) 3 O 4 HEOs by tuning the molar ratio of PEG to metal cations ( P / M ). The results show that PEG plays three roles during synthesis, serving simultaneously as a coordinating dispersant, a structure-directing agent, and an in situ porogen. The optimized HEO ( P / M = 4/5) exhibits a uniform nanoparticle morphology and a well-developed pore architecture, delivering a specific capacitance of 557.6 F g –1 . Kinetic analysis further indicates that its pseudocapacitive behavior is from a cooperative effect involving both capacitive-controlled and diffusion-dominated mechanisms. The assembled asymmetric supercapacitor device achieves an energy density of 64.2 Wh kg –1 at a power density of 375.3 W kg –1 and retains 81.3% of its capacitance after 10000 charge/discharge cycles. These outstanding electrochemical properties highlight the promise of PEG template (CrMnFeCoNi) 3 O 4 HEOs for advanced energy storage applications. Graphical abstract
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高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Mengyue Gao,Zhiheng Li,Mengjie Liu,Ting He,Xiaolu Su,Yueting Zhao,Zhiqiao Zou,Yanxing Yao,Fengmei Jin,Zhihao Li,Lihua Wang
A dual-metal-site MOF nanozyme exhibits enhanced oxidoreductases-like activity. • DMS MOF nanozyme-based sensor shows high sensitivity in Cr(VI) detection. • The sensor shows excellent performance in dairy product samples. A dual-metal-site metal-organic framework (DMS MOF) nanozyme was developed for highly sensitive colorimetric detection of Cr(VI) in dairy products. DMS MOF nanozyme integrates trivalent iron nodes and iron-porphyrin ligands to mimic the multi-center natural oxidoreductases, with adjacent dual-metal centers synergistically enhancing catalytic activity. Steady-state kinetic analyses and Zeta potential investigations demonstrate that the DMS MOF exhibits significantly lower Michaelis-Menten constants and enhanced substrate affinity than single-metal-site MOFs. The proposed method based on DMS MOF nanozyme enables highly sensitive colorimetric sensing of Cr(VI) within merely 5 min, achieving a broad linear range from 0.50 ppb to 5.0 ppm and a limit of detection (LOD) of 0.36 ppb. Furthermore, the developed strategy has been validated in complex dairy products including pure milk, yogurt, and milk powder, yielding recoveries of 84.0–110% with RSD ≤2.10%. Thus, engineered DMS-MOF nanozymes with enhanced activity provide a cost-effective, reliable approach for heavy-metal detection in foods. Download: Download high-res image (173KB) Download: Download full-size image
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PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2026
·
IF 6.6
Chuanlong Huang,Mengqi Hao,Shurun Yao,Lirong Wang,Gang Liu,Zhuo Wei
Bioreduction of Cr(VI) by Shewanella through extracellular electron transmission (EET) attracts increasing interest due to cytochrome c (cyts c ) system especially conductive flagella (“nanowire”) structure. The responses of bioreduction efficiency, “nanowire” growth, cyts c synthesis, and e (electron) transmission intensity through CymA→MtrA→MtrB→MtrC→OmcA (Route 1) and CymA→NapA→NapB (Route 2) to iron ion (Fe 3 + ) and nitrate (NO 3 - ) were evaluated. Results showed that Fe 3+ and NO 3 - of 1–1.5 mM significantly ( p < 0.01) enhanced bioreduction of Cr(VI) from 67% to 82% and 79%, respectively with promoted cyts c -mediated c onductivity (C p ). Both Fe 3+ and NO 3 - stimulated the growth of “nanowire” and synthesis of cyts c participating in EET with Fe 3+ showing stronger stimulation on Routes 1 while NO 3 - on Routes 2. The genes expression of cyts c on inner membrane (CymA), periplasmic space (NapA/NapB), and “nanowire” (MtrA/MtrB/MtrC, OmcA) show synchronous responses to Fe 3+ and NO 3 - . However, contents of mobile cyts c in extracellular polymeric substances (EPS) and structural cyts c in cell membrane showed inconsistent responses to Fe 3+ and NO 3 - . Overall, this study illustrated the regulation mechanism of e acceptors on cyts c- electron transmission system of Shewanella , which help improving the electrochemical efficiency on Shewanella and provide novel idea in chromium remediation strategy .
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高影响因子
ADVANCED POWDER TECHNOLOGY
·
2026
·Vol. 37
·期 9
·105408
·
IF 4.5
Xiaoying Huang,Mingliang Xiang,Xiao Jin,Min Nie,Wei Xu,Rie Umetsu,Qing Yang,Yanan Chen,Jun-Qiang Wang,Yan Zhang
With the rapid advancement of power electronics toward high-frequency and miniaturization, there is an urgent demand for soft magnetic composites (SMCs) that possess both high permeability and low core loss. Herein, a novel Cr-O&(Ni,Zn)Fe 2 O 4 synergistic hybrid insulation was synthesized on FeSiBCCr amorphous powders via sequential hydrothermal and chemical co-precipitation methods. The oxygen partial pressure during annealing was optimized using 0.8 wt.% carbon powder to enhance the crystallinity and magnetic properties of the ferrite insulating coating. The resulting SMCs exhibited a saturation magnetization ( M s ) of 140.0 emu/g and an effective permeability ( μ e ) of 35.03. Notably, the core loss P 50mT/1MHz was reduced to 2143.10 mW/cm 3 , which is 50.72% lower than that of the core sample prepared by using raw powder without ferrite insulating coating. This synergistic hybrid insulation effectively suppresses inter-particle eddy currents and reduces domain wall pinning, offering a high-performance solution for high-frequency power electronics.
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Jiayuan Zhang,Zhenlong Liu,Yu Liu,Liping Jiang,Caixia Ma,Lei Yang,Zunyuan Xie,Jizhen Li,Guofang Zhang
Transition metal oxides exhibit inherent catalytic activity for ammonium perchlorate (AP) decomposition; however, their performance is limited by the scarcity of accessible active sites and low conductivity. Therefore, morphology-directed structural design and interfacial engineering are highly desirable. In this study, two-dimensional (2D) MCo 2 O 4 nanosheets ( M = Fe, Ni, Cu, and Cr) were synthesized via a thermal expansion method and subsequently combined with three types of carbon materials C x (C x = rGO, CNTs, and g-C 3 N 4 ) to construct 2D MCo 2 O 4 /C x composites. Structural analyses demonstrate that the intimate interfacial coupling between 2D MCo 2 O 4 nanosheets and carbon materials effectively suppresses restacking and establishes a continuous conductive network. More importantly, strong interfacial coupling enables effective electronic modulation at the heterojunction, resulting in an optimized charge distribution and enhanced interfacial electron transfer. Among all catalysts, 5 wt. % FeCo 2 O 4 /rGO-1 demonstrates the most notable catalytic activity for AP decomposition, reducing its peak temperature in the high-temperature decomposition stage by 137.4 °C and increasing its heat release by 736.33 J·g⁻ 1 . Electrochemical tests confirm that accelerated interfacial charge transfer enhances AP pyrolysis. Kinetic modelling, TG-FTIR-MS, and DFT calculations indicate that the 2D-2D heterointerface boosts the adsorption of the AP intermediate NH 3 and promotes its conversion into higher-valence NO 2 , while also accelerating electron transport and lowering the decomposition barrier. The synergistic effect between interfacial electron transport and the heterojunction promotes the rapid AP degradation. Based on these findings, a plausible catalytic mechanism for AP decomposition is proposed.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122565
·
IF 7.5
Cheng Yu,Xuantong Li,Chenchen Qu,Chunhui Gao,Yichao Wu,Jiangrong Xiao,Ke Dai,Peng Cai,Qiaoyun Huang
Environmentally persistent free radicals (EPFRs) can interact with various soil components and drive biogeochemical cycles. However, few studies have investigated the mechanisms by which EPFRs promote extracellular electron transfer (EET). The effect of fulvic acid and iron-bearing minerals on the Cr(VI) bioreduction by MR-1 was investigated. The electrochemical characterization, intracellular reactive oxygen species (ROS) detection and transcriptomic analysis of function genes were selected to explore the EPFRs-mediated EET by Shewanella oneidensis MR-1 (MR-1) and the expression of genes related to Cr(VI) bioreduction. Kinetic experiments showed that fulvic acid significantly enhanced Cr(VI) bioreduction by both MR-1 and the ΔomcA/mtrC mutant. Moreover, in the presence of iron-bearing minerals and fulvic acid, Cr(VI) bioreduction by MR-1 was greater than that by the ΔomcA/mtrC and ΔcymA mutants. Thus, fulvic acid acted as an electron shuttle in EET via metal-reducing pathways. Electron paramagnetic resonance spectroscopy and GO enrichment analysis revealed that nitrogen-centered EPFRs in fulvic acid decreased intracellular ROS by promoting glutathione synthesis, thereby accelerating Cr(VI) bioreduction via intracellular reductase. Combined with heat map results, these findings indicated that decreasing intracellular ROS could upregulate the expression of cymA , fccA , and omcA . In the presence of iron-bearing minerals, fulvic acid also significantly decreased intracellular ROS. Furthermore, on the surface of iron-bearing minerals, nitrogen-centered EPFRs were transformed into oxygen-centered EPFRs, thereby facilitating electron transfer between outer-membrane cytochromes and iron-bearing minerals. These findings provide new insights into the EPFR-mediated electron shuttling model and exhibit implications for the remediation of Cr(VI) pollution.
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高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Bing Hou,Ling Wang,Fan Tian,Zhenhua Dang,Egamberdiev Elmurod Abduqodirovich,Donaev Sardor Burkhanovich,Akmalova Guzal Yupovna,Semencha Alexander Vyacheslavovich,Jingwen Pan,Lei Wang
Ce@C exhibited superior Cr(VI) and phenol adsorption capacity. • Cr(VI) and phenol possessed a synergistic adsorption effect in binary-component. • Phenol indirectly promoted the Cr(VI) reduction by reducing Ce(IV) to Ce(III). • Oxidized phenol increased the content of oxygen-containing functional groups in Ce@C. • Ce(III) formed complexes with phenol to enhance the phenol and Cr(VI) adsorption. Cerium-based adsorbent has unique advantages of variable valence and abundant oxygen vacancies for the adsorption of hexavalent chromium (Cr(VI)). However, complex water bodies contain organic pollutants such as phenol, and the adsorption performance and mechanism of cerium-based adsorbent for multiple components still need to be explored. Herein, cerium-based adsorbent (Ce@C) was synthesized to explore the single-component and binary-component adsorption properties of Cr(VI) and phenol. Compared with single-component adsorption, Ce@C exhibited excellent adsorption performance for Cr(VI) and phenol in multi-component, with maximum adsorption capacities reaching 55.74 and 89.34 mg/g respectively at 25 °C (C e(Cr(VI)) = 50 mg/L, C e(phenol) = 150 mg/L). Ce@C showed excellent regeneration performance, and Cr(VI) adsorption capacity remaining almost stable and phenol adsorption capacity increasing by 30.44% after 5 cycles. The adsorption capacities of Cr(VI) and phenol were 1.78 times and 1.42 times higher than that of the single-component system, respectively, demonstrating a significant synergistic enhancement effect. Mechanistic results indicated that phenol transferred electrons to Cr(VI) through Ce(III), facilitating the reduction of Cr(VI) to Cr(III) and increasing the content of oxygen-containing functional groups. The complex formed by Cr(III) and phenol enhanced the phenol adsorption, enabling the continuous adsorption of Cr(VI) and phenol. This study provides new insights into improving the removal performance of Ce-based adsorbents for Cr(VI) and phenol in composite systems, further expanding the application potential of Ce-based adsorbents in the treatment of actual wastewater containing Cr(VI) and phenol. Download: Download high-res image (172KB) Download: Download full-size image
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高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Feifei Xia,Shudong Ye,Jinjin Zhang,Jinhua Wu
Chromium-contaminated soil remediation via bioleaching generates wastewater containing persistent organic-Cr(III) complexes, which pose significant challenges during the post-treatment process. This study developed an innovative ternary synergistic system integrating mixed heterotrophic/autotrophic denitrifying bacteria with zero-valent iron (Fe 0 ) for promoted organic-Cr(III) removal and stabilization. In the nitrate-modulated biotic-Fe 0 (NMB Fe 0 ) system, heterotrophic bacteria mediated organic acid degradation, resulting in Cr(III) ion liberation. Concurrently, autotrophic bacteria utilized cathodic hydrogen from iron corrosion to accelerate both Fe 0 corrosion and secondary mineral production (e.g., magnetite and green rust) for subsequent Cr(III) adsorption and immobilization. The integrated system achieved 78.5% organic-Cr(III) removal in 5 d, representing a 6.7-fold enhancement as compared to the abiotic-Fe 0 control. Statistical analysis revealed significant positive correlations between nitrate concentration, Fe 0 dosage, and removal efficiency within the biological adaptation range, confirming denitrification as the primary driving mechanism. Leaching toxicity and reoxidation assessments demonstrated superior environmental stability of immobilized Cr(III) by NMB Fe 0 . Mechanistic investigations indicated that the synergistic interplay between heterotrophic and hydrogen-autotrophic bacteria effectively inhibited both organic-Cr(III) complexation and Fe Cr passivation layer formation on Fe 0 surface. These findings provide a novel, efficient, and sustainable strategy for bioleaching wastewater treatment.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Yanqing Yang,Yuchen Yang,Zhixian Du,Weike Zhang,Jin Liu
A Z-scheme BiOBr/COF-1 heterojunction was synthesized via a solvothermal method. • The catalyst exhibited enhanced visible-light absorption and charge separation. • A mechanism for the simultaneous removal of RhB and Cr(VI) was revealed. The construction of heterojunctions is commonly employed to boost the separation efficiency of photogenerated charge carriers and the overall photocatalytic performance. In this study, a novel Z -scheme BiOBr/COF-1 heterojunction photocatalyst was synthesized via a facile solvothermal method. Comprehensive characterization confirmed the effective formation of the heterojunction, which exhibited enhanced visible-light absorption and improved separation efficiency of photogenerated charge carriers. Compared with pristine COF-1 and BiOBr, the optimized BiOBr/COF-1 composite (BC-1) demonstrated superior photocatalytic activity for both rhodamine B (RhB) degradation and Cr(VI) reduction. Notably, the reduction efficiency of Cr(VI) was significantly enhanced in a coexisting system of RhB and Cr(VI). In addition, BiOBr/COF-1 exhibited good structural stability over multiple reaction cycles. This work provides an effective strategy for designing Z -scheme photocatalysts to treat complex wastewater containing organic and heavy metal pollutants. Download: Download high-res image (339KB) Download: Download full-size image
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高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Kaipian Shi,Junfeng An,Yu Yin,Li Yin,Ziyu Rong,Jinyu Han,Shiyin Li
A stable XG-WAS@n-FeS slurry was constructed for simultaneous removal of Cr(VI) and TBBPA. • Xanthan gum enhanced slurry viscosity, stability, and oxidation resistance. • TBBPA was transformed through successive debromination reactions. • Coexisting contaminants influenced TBBPA removal through site competition. Nanoscale ferrous sulfide (n-FeS) is a promising reductant for water treatment, but rapid oxidation, particle aggregation, and poor transportability restrict its practical use. In this study, n-FeS was immobilized on alkali-modified waste activated sludge (WAS), and xanthan gum (XG) was added as a structural regulator. This approach produced a stable, shear-thinning XG-WAS@n-FeS slurry for the simultaneous removal of Cr(VI) and tetrabromobisphenol A (TBBPA). Carboxyl and hydroxyl groups contributed to the binding of FeS within the XG-WAS matrix, which helped establish a stable reactive interface. The slurry exhibited lower viscosity at higher shear rates, confirming its shear-thinning behavior. Increasing the XG concentration also improved sedimentation stability and oxidation resistance. Cr(VI) was completely removed at all tested concentrations. By contrast, TBBPA removal decreased from 81.93% to 53.19% as the Cr(VI) concentration increased from 20 to 80 mg L −1 . It also decreased from 92.49% to 58.99% when the TBBPA concentration increased from 5 to 20 μM. These concentration-dependent trends reflect the finite reducing capacity of the slurry and the preferential consumption of electrons by Cr(VI). Humic acid, Ca 2+ , Mg 2+ , and Cl − enhanced TBBPA removal to varying degrees, while Cr(VI) removal remained complete. XPS analysis showed that Cr(VI) was reduced and immobilized as Cr(III) species. HPLC-MS analysis revealed the stepwise debromination of TBBPA to BPA. These findings demonstrate that XG-WAS@n-FeS is a stable and effective slurry for treating water containing both Cr(VI) and TBBPA. Download: Download high-res image (190KB) Download: Download full-size image
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高影响因子
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