CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Siqi Wang,Qinglu Zhou,Xue Han,Mengning Wang,Xuerui Liu,Qun Jiang,Tianqi Liu,Jianhua Qu,Ying Zhang
Hexavalent chromium (Cr(VI)), with its high mobility and acute toxicity, seriously threatens both soil integrity and human health. Herein, we propose a material design strategy to enhance Cr(VI) detoxification by loading sulfur-modified nanoscale zero-valent iron onto phosphorus-modified biochar (S-nZVI@PBC), attaining highly efficient remediation of Cr residues in contaminated sites. Characterization results demonstrated that S modification and PBC loading effectively prevent oxidation and aggregation of primitive nZVI, thereby enhancing electron transfer and reactivity of the material. Compared to traditional nZVI, S-nZVI@PBC exhibited a 2.4 times enhancement in Cr(VI) reduction efficiency and 1.12 times improvement in electron utilization efficiency, achieving an optimal adsorption capacity of 352.44 mg/g within 60 min. After 28 d of remediation, soil Cr(VI) content decreased significantly from 2000 to 361.03 mg/kg, while the TCLP leachate concentration of Cr was reduced from 2000 to 178.71 mg/kg, effectively mitigating the biotoxicity of Cr(VI). Furthermore, S-nZVI@PBC exhibited excellent reactivity and mobility, the effect of remediation achieved nearly 100 % Cr(VI) removal in topsoil within 1 d and reduced the deep soil concentrations by 1164.70 mg/kg after 21 d, while effectively transforming exchangeable Cr into immobilized Fe/Mn oxide-bound species. The remediation mechanism of S-nZVI@PBC in Cr(VI)-contaminated soils predominantly decreased Cr bioavailability via adsorption, reduction, and co-precipitation pathways. Collectively, this study presents a highly effective nZVI modification strategy, providing theoretical and technical support for effective site remediation.
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高影响因子
Processes
·
2025
·Vol. 13
·期 11
·3652
·
IF 2.8
Kai Li,Rongguo Sun
Mercury (Hg) contamination in water and soil poses severe ecological and human health risks, yet conventional sorbents often suffer from limited capacity, selectivity, and stability. Here, we report a bifunctional porous organic polymer (AMTD-TCT) rationally constructed by covalently crosslinking 2-amino-5-mercapto-1,3,4-thiadiazole with trichlorotriazine, thereby integrating abundant sulfur and nitrogen coordination sites within a stable mesoporous framework. AMTD-TCT exhibits an ultrahigh Hg(II) adsorption capacity of 1257.7 mg g−1, far exceeding most reported porous sorbents. Adsorption follows monolayer chemisorption, governed by strong S–Hg and N–Hg coordination and Na+/Hg2+ion exchange, while hierarchical porosity ensures rapid diffusion and efficient utilization of active sites. The polymer maintains robust performance over a wide pH range and demonstrates strong retention with minimal desorption, underscoring its environmental durability. These findings highlight AMTD-TCT as a highly effective and scalable platform for Hg(II) remediation in complex aqueous–soil systems and illustrate a generalizable molecular design strategy for developing multifunctional porous polymers in advanced separation and purification technologies.
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Abdallah Abdelfattah,Reham Eltawab,Ke Li,Zhong-Ting Hu,Liang Cheng
The prolonged startup period caused by slow and unstable biofilm formation remains a major barrier to large-scale application of membrane-aerated biofilm reactors (MABRs). This study developed a novel sodium alginate–assisted immobilization strategy to accelerate biofilm establishment and enhance nitrogen removal. A homogeneous mixture of sodium alginate and activated sludge was spray-coated onto plasma-treated PVDF hollow-fiber membranes, followed by CaCl₂ mist crosslinking to form a thin gel layer immobilizing active biomass. The coated MABR achieved 85 ± 5 % surface coverage within seven days—over twice that of the control—and complete ammonium oxidation (>90 %) in 10 days, reducing startup time by about 50 %. Digital microscopy and SEM revealed rapid transition from the synthetic alginate matrix to a self-sustained EPS network, while 16S rRNA sequencing confirmed enriched Nitrosomonas and Nitrospira with enhanced microbial diversity. The oxygen transfer rate initially decreased by 18 % after coating but recovered to 95 % of the original after partial scaffold dissolution, showing reversible mass-transfer adaptability. Mechanistically, the biodegradable Ca 2+ –alginate scaffold provided an initial attachment platform evolving into a stable stratified biofilm enabling simultaneous nitrification and denitrification. This study establishes a mechanistic and practical basis for biopolymer-assisted biofilm engineering toward rapid-startup, high-efficiency MABR systems.
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Jianhua Sha,Yunkai Sun,Haiyan Yu,Zitong Yang,Hongwei Chu,Yan Wang,Qinyan Yue,Weiyan Yin,Shiping Xu
To overcome the recovery challenge of nanoscale photocatalysts, great endeavor has been paid to explore effective nano-TiO 2 immobilization approaches, but comprehensive comparison between these methods is still lacking. Herein, four approaches, namely impregnation-calcination, sol-gel, solvothermal route and click chemistry strategy were fully compared to immobilize nano-TiO 2 onto biochar from the viewpoint of properties characterization, photocatalytic activity, structure stability and pollutant degradation pathway. It was found that, compared to other three methods, product obtained by click chemistry (CC-P25/BC) showed superior adsorption-photocatalysis synergy and persistent long-term stability. These superiorities were not attributed to pore structure, crystallinity or light absorption , but predominated by the robust chemical bonds between TiO 2 and biochar, which served as an effective internal channel for electrons transportation. Besides, with CC-P25/BC as photocatalyst, a unique self-acceleration period was observed during methylene orange (MO) degradation. Via investigating MO degradation pathway and solution environment, we found that it was the strong photocatalytic activity of CC-P25/BC that selectively accelerated MO demethylation, thus leading to solution pH drop and subsequent MO adsorption enhancement and then degradation acceleration. Thus, this study confirmed the superiority of click chemistry in nanoscale photocatalyst immobilization, and affirmed the importance of pollutant degradation process in governing its degradation rate.
研究领域:
环境科学
·
材料科学
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高影响因子
ANALYTICA CHIMICA ACTA
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2019
·
IF 5.256
Junning Wang,Mengyuan Bao,Tianxiang Wei,Zhaoyin Wang,Zhihui Dai
An iron-nickel bimetallic metal−organic framework (FeNi-MOF) with inner peroxidase-like activity as a support for enzyme immobilization was synthesized for the first time. And the GOx-mediated synthesis of mimic multienzyme system (GOx/FeNi-MOF) was obtained by a one-step biomimetic mineralization . FeNi-MOF played a dual role of a peroxidase mimic and a protective coating. Therefore, the obtained multienzyme system showed both peroxidase-like activity of FeNi-MOF and the biological activity of natural enzyme . FeNi-MOF acted as a peroxidase mimic, showing a higher affinity for hydrogen peroxide (H 2 O 2 ). The enhanced catalytic activity of the FeNi-MOF may result from synergistic effect between iron and nickel. In addition, the GOx/FeNi-MOF was selected as a proof of concept and succeeded in a one-step colorimetric detection of glucose by tandem catalysis. A small amount of the product was used for glucose detection, and the detection range was 0.3–35 mM, which indicated that our sensor can meet the clinical needs for diagnose diabetes.
研究领域:
生物化学
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材料科学
·
医学诊断
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DOI
PubMed
高影响因子
ENZYME AND MICROBIAL TECHNOLOGY
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2020
·
IF 3.448
Jia-Qin Wu,Xiao-Mei Xu,Ding-Lin Wang,Neng-Bing Long,Rui-Feng Zhang
Novel nano-composites were prepared by coating epoxy resin-based cationic polymer in nano-thickness via in-situ curing on the nano-wall of macroporous SiO 2 with pore size of 0.5∼1 μm. By changing the thickness of polymer coating the specific surface area and porosity varied in range of 115∼74 m 2 /g and 90.4∼83.9 %, respectively. Through ion exchange phospholipase D (PLD, from Streptomyces sp ) was efficiently immobilized on the nano-composites as support and the immobilized PLD was applied for the highly efficient synthesis of phosphatidylserine (PS). The loading amount of PLD on the nano-composited support reached to a maximum of 90.2 mg/g support , 4 times as high as that on the pure macroporous silica. The specific activity of the immobilized PLD reached as high as 16,230 U/g protein , while that of free PLD was 18,780 U/g protein . Under a wide range of temperature and pH the stability and activity of the immobilized PLD were greatly improved as compared with the free ones. Under optimized conditions at 45 °C and pH 7.0, the PS yield reached as high as 96.2 % within 40 min. After 28 days storage the immobilized PLD retained 82.2 % of original activity, and after 12 cycling reuses it retained 79.3 % of PS yield, which indicated that the immobilized PLD exhibited good stability.
研究领域:
生物化学
·
酶工程
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Siyi Wang,Lin Wang,Zijie Li,Pengcheng Zhang,Ke Du,Liyong Yuan,Shunyan Ning,Yuezhou Wei,Weiqun Shi
A novel composite of zero-valent iron nanoparticles supported on alkalized Ti 3 C 2 T x nanoflakes (nZVI/Alk-Ti 3 C 2 T x ) was constructed by an in-situ growth method for simultaneous adsorption and reduction U(VI) from aqueous solution in anoxic conditions . The effect of various factors such as adsorbent dose, pH, ionic strength, contact time, initial U(VI) concentration and environmental media were comprehensively investigated by batch experiments. Benefiting from the good dispersion uniformity of nZVI on MXene substrates, nZVI/Alk-Ti 3 C 2 T x exhibited rapid removal kinetics, excellent selectivity , 100% removal efficiency and up to 1315 mg g −1 uptake capacity for U(VI) capture. In the presence of mimic groundwater, 1.0 mM NaHCO 3 and 10 mg L −1 humic acid , the removal percentages of U(VI) by the composites could reach 95.1%, 88.9% and 69.5%, respectively. The reaction mechanism between U(VI) and nZVI/Alk-Ti 3 C 2 T x has been clarified based on FTIR , XANES , XPS and XRD analysis. Depending on the consumption of reactive nZVI in the composites and the solution pH, the elimination of U(VI) could be realized by different pathways including reductive immobilization in the form of UO 2 , inner-sphere surface complexation and hydrolysis precipitation. The present study illustrates that the nZVI/Alk-Ti 3 C 2 T x composite may be an efficient scavenger for radioactive wastewater purification in environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2022
·Vol. 45
·期 12
·1955-1966
·
IF 3.434
Liu Runtang,Wang Silin,Han Mengyao,Zhang Wei,Xu Huajin,Hu Yi
In this study, an amino-functionalized ionic liquid-modified magnetic chitosan (MACS-NIL) containing 2,2-diamine-di-3-ethylbenzothiazolin-6-sulfonic acid (ABTS) was used as a carrier, and dialdehyde starch (DAS) was used as a cross-linking agent to covalently immobilize laccase (MACS-NIL-DAS-lac), which realized the co-immobilization of laccase and ABTS. The carrier was characterized by Fourier infrared transform spectroscopy, scanning electron microscopy, thermogravimetric analysis, X-ray diffraction analysis, electron paramagnetic resonance, etc. The immobilization efficiency and activity retention of MACS-NIL-DAS-lac could reach 76.7% and 69.8%, respectively. At the same time, its pH stability, thermal stability, and storage stability had been significantly improved. In the organic pollutant removal performance test, the removal rate of 2,4-dichlorophenol (10 mg/L) by MACS-NIL-DAS-lac (1 U) could reach 100% within 6 h, and the removal efficiency could still reach 88.6% after six catalytic runs. In addition, MACS-NIL-DAS-lac also showed excellent degradation ability for other conventional phenolic pollutants and polycyclic aromatic hydrocarbons. The research results showed that MACS-NIL-DAS fabricated by the combination inorganic material, organic biomacromolecules, ionic liquid, and electron mediator could be used as a novel carrier for laccase immobilization and the immobilized laccase showed excellent removal efficiency for organic pollutants.
研究领域:
生物技术
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环境科学
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材料科学
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DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Yuanjian Li,Chong Wang,Wenyu Wang,Alex Yong Sheng Eng,Mintao Wan,Lin Fu,Eryang Mao,Guocheng Li,Jiang Tang,Zhi Wei Seh,Yongming Sun
Rechargeable lithium–sulfur batteries have attracted tremendous scientific attention owing to their high energy density. However, their practical application is greatly hindered by the notorious shuttling of soluble lithium polysulfide (LPS) intermediates with sluggish redox reactions and uncontrolled precipitation behavior. Herein, we report a semiliquid cathode composed of an active LPS solution/carbon nanofiber (CNF) composite layer, capped with a carbon nanotube (CNT) thin film decorated with metallic Mo nanoclusters that regulate the electrochemical redox reactions of LPS. The trace amount (0.05 mg cm–2) of metallic Mo on the CNT film provides sufficient capturing centers for the chemical immobilization of LPS. Together with physical blocking of LPS by the compact CNT film, free diffusion of LPS is significantly restrained and the self-discharge behavior of the Li–S cell is thus effectively suppressed. Importantly, the metallic Mo nanoclusters enable fast catalytic conversion of LPS and regular deposition of lithium sulfide. As a result, the engineered cathode exhibits a high active sulfur utilization (1401 mAh g–1 at 0.1 C), stable cycling (500 cycles at 1 C with 0.06% decay per cycle), high rate performance (694 mAh g–1 at 5 C), and low self-discharge rate (3% after 72 h of rest). Moreover, a high reversible areal capacity of 4.75 mAh cm–2 is maintained after 100 cycles at 0.2 C for a cathode with a high sulfur loading of 7.64 mg cm–2. This work provides significant insight into the structural and materials design of an advanced sulfur-based cathode that effectively regulates the electrochemical reactions of sulfur species in high-energy Li–S batteries.
研究领域:
储能
·
材料科学
·
电化学
·
纳米材料
·
电池技术
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DOI
高影响因子
Nano Research
·
2023
·Vol. 17
·期 3
·1473-1481
·
IF 9.9
Ouyang Yue,Li Xiaoxiao,Zhu Jiexin,Zong Wei,Dai Yuhang,Gao Xuan,Zhang Wei,Yang Shengyuan,Bagherzadeh Roohollah,Lai Feili,Miao Yue-E.,Liu Tianxi
The shuttle effect induced by soluble lithium polysulfides (LiPSs) is known as one of the crucial issues that limit the practical applications of lithium-sulfur (Li-S) batteries. Herein, a titanium dioxide nanoparticle embedded in nitrogen-doped porous carbon nanofiber (TiO 2 @NCNF) composite is constructed via an interface-induced polymerization strategy to serve as an ideal sulfur host. Under the protection of the nanofiber walls, the uniformly dispersed TiO 2 nanocrystalline can act as capturing centers to constantly immobilize LiPSs towards durable sulfur chemistry. Besides, the mesoporous microstructure in the fibrous framework endows the TiO 2 @NCNF host with strong physical reservation for sulfur and LiPSs, sufficient pathways for electron/ion transfer, and excellent endurance for volume change. As expected, the sulfur-loaded TiO 2 @NCNF composite electrode presents a fabulous rate performance and long cycle lifespan (capacity fading rate of 0.062% per cycle over 500 cycles) at 2.0 C. Furthermore, the assembled Li-S batteries harvest superb areal capacity and cycling stability even under high sulfur loading and lean electrolyte conditions.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
·
高分子化学
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2012
·Vol. 16
·期 12
·3783-3790
·
IF 2.131
Dong Jing,Liu Tao,Meng Xiaomeng,Zhu Jianying,Shang Kun,Ai Shiyun,Cui Shenglong
A new method based on specific binding between glycoprotein acetylcholinesterase and boronic acid-functionalized Fe@Au magnetic nanoparticles was presented for the development of acetylcholinesterase biosensor. Alginate–graphene composite-modified electrode was firstly prepared as the substrate. Then, biocompatible boronic acid-functionalized Fe@Au magnetic nanoparticles were anchored by the covalence between the cis -diol of alginate and the boronic acid group on Fe@Au nanoparticles. Acetylcholinesterase was subsequently immobilized via the bonding between the glycosyl of acetylcholinesterase and the boronic acid group. The immobilized enzyme retained relatively high bioactivity and the fabricated biosensor exhibited high sensitivity and fast response to acetylthiocholine chloride. Based on enzyme inhibition, carbamate pesticide was detected using Furadan as a model compound. Two linear ranges of 0.05–15 and 15–400 ppb were obtained with a detection limit of 0.01 ppb. The biosensor also showed acceptable reproducibility and relatively good storage stability. Moreover, satisfactory results were obtained in the real sample analysis.
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高影响因子
CARBOHYDRATE POLYMERS
·
2015
·
IF 4.074
Linbin Jiang,Yuan Lu,Xingyun Liu,Hu Tu,Jianwei Zhang,Xiaowen Shi,Hongbing Deng,Yumin Du
Quaternized carboxymethyl chitosan (QCM-chitosan) and organic rectorite (OREC) immobilized nanofibrous mats are fabricated via layer-by-layer (LBL) technique in a self-assembly manner. The negatively charged cellulose nanofibrous mats hydrolyzed from electrospun cellulose acetate (CEL) mats are alternately modified with the positively charged QCM-chitosan and OREC intercalated composites and the negatively charged sodium alginate (ALG) via LBL technique. The morphology and antibacterial activity of the resultant mats are studied by changing the number of deposition bilayers, the compositions of dipping solutions and outermost layer. X-ray photoelectron spectroscopy results imply that QCM-chitosan and OREC are coated on cellulose mats. Besides, wide angle X-ray diffraction and small angle X-ray diffraction are applied to investigate the crystalline of the composite mats and the interlayer distance of OREC, respectively. The antibacterial activity of the mats increases with the incorporation of OREC into LBL films.
研究领域:
材料科学
·
纳米技术
·
高分子科学
·
表面工程
·
生物医学工程
·
抗菌技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）