Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 41
·20110-20120
·
IF 9.931
Jianhong Ma,Jinming Luo,Yutang Liu,Yuanfeng Wei,Tao Cai,Xingwen Yu,Hui Liu,Chengbin Liu,John C. Crittenden
A systematic study of the interaction between adsorbents and potentially toxic metal ions in multicomponent systems is of great significance due to the coexistence of multiple potentially toxic metal ions in the real water environment. In this study, a new humic substance-based double network hydrogel (PAA/HS gel) was produced by a radical polymerization method and applied to Pb(II), Cu(II) and Cd(II) removal in both individual and multicomponent systems under various conditions. The macroporous network structure (aperture ≈ 10 μm) and high water permeability of the PAA/HS gel could fully facilitate the active site exposure and increase the potentially toxic metal ion diffusion rate. The PAA/HS gel exhibited high theoretical adsorption capacities of 360.50, 151.00 and 412.76 mg g−1 for Pb(II), Cu(II) and Cd(II) in individual systems. Noticeably, both interference and promotion of adsorption behaviors were identified in multicomponent systems. In binary systems, the adsorption capacity and rate were decreased for Pb(II) and Cu(II), while increased for Cd(II). In ternary systems, the adsorption capacity and rate for Pb(II), Cu(II) and Cd(II) were decreased. The adsorption isotherms and kinetics were well fitted by Langmuir–Freundlich and Elovich models, respectively, indicating that the PAA/HS gel possessed a heterogeneous surface and various types of binding sites. The FTIR and XPS studies confirmed that both nitrogen- and oxygen-containing functional groups (i.e., amino, phenolic hydroxyl and carboxyl groups) were involved in the adsorption process, while the interactions between functional groups and Pb(II), Cu(II) and Cd(II) were different.
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JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Junjie Wang,Hui Zhou,Yang Li,Yeshu Mu,Jinghua Li,Chen Hong,Wen Luo
A novel series of benzo[ cd ]indol-2(1 H )-one-donepezil (BIO-DPZ) hybrids (5a-m, 6a-k) was designed, synthesized and evaluated as cholinesterase inhibitors and living cell imaging agents. These compounds were potent inhibitors of both acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). Compound 6a exhibited the strongest inhibitory activity against AChE with an IC 50 value of 0.16 μM. Compound 6i had the strongest inhibition of BuChE with an IC 50 value of 5.37 μM. Kinetic and molecular modeling studies showed that 6a bound both catalytic active site and peripheral anionic site of AChE. Compounds 6a and 6i both showed lower SH-SY5Y, HepG2 and HL-7702 cytotoxicity than the mitoxantrone. Promisingly, the most active compound, 6a, was successfully used in living SH-SY5Y cell imaging and had predictable lipophilicity and blood-brain-barrier permeation properties. These hybrids should undergo further systematic study in the treatment of Alzheimer's disease.
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SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
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2021
·
IF 3.752
Yujie Chen,Man He,Beibei Chen,Bin Hu
A novel thiol-grafted magnetic polymer (MPPs-SH) was synthesized by “click reaction” between 1,2-ethanedithiol and Fe 3 O 4 @SiO 2 @poly (ethylene glycol dimethacrylate -co- glycidyl methacrylate). The resultant MPPs-SH had high S content (5.4 wt%) and exhibited large specific surface area (156.8 m 2 g −1 ) as well as high adsorption capacity of 254, 64.2, 56.6 mg g −1 for mercury, cadmium and lead ions , respectively. With the prepared MPPs-SH as sorbent , a method of magnetic solid phase extraction combined with inductively coupled plasma mass spectrometry was developed for the quantification of trace mercury, cadmium and lead in environmental water samples. The extraction conditions including sample pH, sample volume, sorbent amount, adsorption/desorption time and elution volume were optimized. Under the optimal conditions, three heavy metal ions were extracted from 150 mL aqueous solution in 10 min and eluted by 0.2 mol L −1 HNO 3 containing 2% thiourea in 5 min. The method presented low limits of detection (0.21, 0.82 and 2.9 ng L −1 ) for target ions. The accuracy of the method was validated by using Certified Reference Materials of Environmental Water including GSB 07–1185–2000 (201435), GSB 07–1183–2000 (201239) and GSB 07–3173–2014 (202046). The application potential was further validated by the determination of trace mercury, cadmium and lead in Yangtze river and East lake water samples. The content of target heavy metal ions in tested water sample was found to be in the range of 6.40–195 ng L −1 , and the recoveries of 86.4–109% were obtained at three spiking concentration levels for mercury, cadmium and lead ions.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Jingyuan Guo,Letu Siqin,Yufei Li,Wenbo Li,Ruijian Liu,Hongmei Luan,Chengjun Zhu
The band alignment of Cu 2 ZnSn(S,Se) 4 (CZTSSe)/CdS(In) in novel CZTSSe solar cells without a ZnO window layer has been initially investigated in our previous studies. However, the In content of CdS(In) diffused into the absorber is low, and the ability to regulate the band arrangement is limited. In this work, we employ In-ion-doped absorbers to adjust defects. However, this approach leads to a significant loss in short-circuit current density (Jsc). To address this, Cd is introduced to enhance Jsc through grain growth promotion and morphological improvement, thereby offsetting the Jsc loss induced by In doping. The co-doping of In and Cd reduces the conduction band offset (CBO) from 0.28 eV to 0.21 eV, thereby inhibiting carrier recombination and enhancing transport efficiency. Additionally, the concentration of bulk defects is reduced by an order of magnitude. As a result, the fill factor (FF) increased from 56.97 % to 60.08 %, Jsc increased from 37.10 mA/cm 2 to 38.66 mA/cm 2 , and open-circuit voltage (Voc) increased from 431.64 mV to 440.48 mV. Finally, the power conversion efficiency (PCE) of CZTSSe solar cell is enhanced to 10.23 %.
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Toxics
·
2026
·Vol. 14
·期 10
·914
·
IF 4.9
Jiajun Feng,Qimiao Huang,Junyuan Liang,Yuyuan Chen,Qiuhua Huang,Zihong Jiang,Peixuan Chen,Jian Kang,Xiang Li
Red inorganic pigments traditionally rely on Pb-, Cd-, Hg-, or Cr(VI)-based colourants that carry avoidable hazard and exposure risks. Here, a family of Sr6YAl1−xFex(BO3)6(0 ≤ x ≤ 1) pigments was prepared by solid-state reaction using Fe3+as the chromophore and no Pb-, Cd-, Hg-, Cr(VI)-, or As-containing precursors. X-ray diffraction shows that the trigonal Sr6YAl(BO3)6-type framework (space group R-3) is retained as a single phase throughout the series; on the basis of isovalent charge, six-coordinate geometry and matched ionic radii, Fe3+substitutes for octahedral Al3+to form a continuous solid solution, and SEM-EDS mapping confirms a broadly homogeneous, single-phase Fe-containing borate. Increasing Fe content strengthens visible absorption and moves the colour from white to a light reddish-orange (warm tan), with the x = 1 end member givingL* = 69.69,a* = 10.08,b* = 12.79 andC* = 16.28. The colour is essentially unchanged in water and dilute acetic acid, shows a moderate shift in alkaline media (ΔE* = 8.05–10.21), and changes markedly only in 0.1 mol L−1HCl (ΔE* = 15.07). Elemental release was screened by immersing 1.00 g of powder in 50 mL of water (H1), 0.01 mol L−1acetic acid (H2) or 0.1 mol L−1HCl (H3) for 24 h at room temperature, with each leachate read three times by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). Water and dilute acid gave similar, modest release, whereas HCl mobilized substantial B, Sr and Y (530.72, 4639.42 and 470.54 mg L−1, i.e., up to 41.87%, 45.15% and 27.08% of the nominal inventory) but very little Fe (0.156 mg L−1, only ≈0.014% of the Fe inventory, and below detection in H1 and H2). The Fe chromophore is thus effectively immobilized even when the borate framework is attacked, decoupling colouration from chromophore leaching. The pigments demonstrate source-level elimination of regulated toxic metals together with strong chromophore retention; the non-standardized extraction provides a conservative release-potential screen rather than a regulatory compliance determination.
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FOOD CONTROL
·
2024
·
IF 5.6
Shuqi Zhang,Jing Yi,Zhilong Zhang,Xuanxuan Yuan,Zhongguo Shan,Haihua Wang
The growing concerns over food contamination caused by microorganisms, coupled with the worsening environmental impact of petroleum-based plastics have drawn significant attention to eco-friendly materials in food packaging. Herein, cyclodextrin-metal-organic framework (CD-MOF) was prepared as promising nanocarrier for the natural product gallic acid (GA). Then, the prepared material (GA@CD-MOF) was incorporated into zein matrix to obtain Zein-GA@CD-MOF films. Further studies showed that the composite films possessed great potential for food packaging, offering excellent UV-light blocking, water resistance , and mechanical properties. Notably, Zein-GA@CD-MOF films demonstrated superior antimicrobial activity (44.56%–77.97% against Escherichia coli O157:H7 and 28.36%–59.49% against Salmonella enterica ) and sustained antioxidant properties for 100 days, which correlated with the sustainable release effect of GA. Furthermore, the exceptional biosafety of GA@CD-MOF has been confirmed through cytotoxicity and hemolysis assays. Pork preservation experiments illustrated that the obtained films could retard protein degradation, microorganism growth, and lipid oxidation, extending the shelf-life by 9 days at 4 °C. These findings suggest that Zein-GA@CD-MOF films has promising application prospects in pork preservation packaging.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yizhong Zhang,Wei Zhou,Junyan Wang,Lixia Jia,Lequan Liu,Xin Tan,Tao Yu,Jinhua Ye
In this study, non-noble metal Cd decorated cubic phase CdS (CdS/Cd) thin layer on a millimeter-scale chitosan-Mg(OH) 2 xerogel beads (CMB) were elaborately designed and successfully synthesized via facile hydrated electrons (e aq •− ) assistant strategy. The in-situ formation of metallic Cd was driven by e aq •− generated from UV/Na 2 SO 3 process. Owing to metallic Cd, CMB@CdS/Cd exhibited better visible-light absorption ability and more efficient separation capability for photo-induced carriers, its hydrogen production efficiency was about threefold improved compared to CMB@CdS. Both characterization methods and density functional theory calculations determined a built-in electric field from metallic Cd to CdS and Ohmic-contact between Cd and CdS, which largely promoted the carriers transfer efficiency. Moreover, the introduction of metallic Cd on the CdS could reduce the ΔG H* , thus greatly boosting the photocatalytic hydrogen production efficiency. This work provides a simple and green approach to construct metallic Cd coupled semiconductor to achieve efficient photocatalytic applications.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124422
·
IF 7.5
Wenjun Fu,Jiangjie Fang,Yongdian Yue,Xinzhuang Fu,Chuanxi Peng,Di Chen,Youchuan Chen,Tong Yue
Calcium silicate-based materials hydrate to form calcium silicate hydrate (C-S-H), a reactive phase capable of immobilizing heavy metals. However, the mechanisms governing element-specific long-term stability remain unclear. In this study, dicalcium silicate (C 2 S) and tricalcium silicate (C 3 S) were used to compare the removal behavior, aging stability, and microscopic immobilization mechanisms of Pb(Ⅱ) and Cd(Ⅱ) in aqueous systems. Both minerals efficiently removed Pb(Ⅱ) and Cd(Ⅱ), while C 3 S showed stronger early Pb(Ⅱ) removal, possibly related to faster hydration-product formation under the tested conditions. Cd(Ⅱ) removal remained above 99% in both systems. Apparent isotherm and kinetic analyses indicated that metal removal was governed by a coupled apparent process involving interfacial adsorption, surface complexation, hydration-product formation, and precipitation, rather than by physical adsorption alone. Long-term aging and acidic leaching tests revealed contrasting stability: Cd-bearing products exhibited strong leaching resistance, whereas Pb-bearing products showed a potential risk of re-release after aging. XRD, XPS, TEM, and TEM-EDS analyses indicated that Pb and Cd were closely associated with C-S-H-related hydration products, suggesting possible Ca-associated binding or partial structural incorporation. The stronger acid-leaching resistance of Cd-bearing products implies more stable association with C-S-H-related phases than that of Pb-bearing products. These findings clarify the element-specific immobilization mechanisms of C 2 S/C 3 S and provide guidance for calcium silicate-based treatment of heavy-metal-contaminated water.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Linrui Li,Peisen Huang,Yubo Pan,Xianyong Hong,Yu Tao,Zhihui Wang,Mingxing Shi,Yu Xia,Mingzhu Xia,Fenghe Wang,Fengyun Wang,Wu Lei
Water pollution by heavy metals poses severe threats to ecosystems and human health. While adsorption offers a promising remediation strategy, the practical application of conventional powdered adsorbents is hampered by poor recyclability, handling difficulties, and limited scalability. To address these challenges, we report a novel adsorbent fabricated by crosslinking carboxymethyl cellulose (CMC) with ethylenediamine tetra(methylene phosphonic acid) (EDTMP), a chelating agent with superior heavy metal affinity. This adsorbent (EDT-CMC) exhibits adsorption capacities of 640.4 ± 9.4 mg/g for Pb 2+ and 401.2 ± 8.2 mg/g for Cd 2+ at 298 K, representing increases of 95.8 ± 7.9% and 96.6 ± 10.5%, respectively, compared to EDTMP-absent adsorbents. Systematic investigations of adsorption kinetics, isotherms, and thermodynamics were conducted, complemented by comprehensive characterizations (XRD, FT-IR, SEM, XPS). The material demonstrates good tolerance to pH variations and competing ions, along with promising performance in fixed-bed column and recyclability studies, underscoring its potential for practical applications. Mechanistic studies reveal that surface complexation and ion exchange are the primary drivers of metal removal, with electrostatic interactions playing a secondary role, a conclusion further validated by density functional theory (DFT) calculations. This work offers two key advancements, the first being a spherical bead-like architecture that overcomes the recyclability and handling limitations of traditional powdered adsorbents, enabling practical fixed-bed applications, and the second is a comprehensive mechanistic elucidation combining experimental characterizations with DFT calculations, providing molecular-level insights into the adsorption process. Overall, EDT-CMC was expected to be an effective adsorbent to apply in the field of heavy metal removal.
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PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Tao Chang,Qin Wang,Shijia Wu,Zhimiao Zhao,Yinjiang Zhang,Xian Lu,Yunhui Zhang
Phosphate-loaded pyrolyzed gypsum board was innovatively reused for Cd(Ⅱ)/Pb(Ⅱ) remediation. • Single and coexisting heavy metal systems were systematically evaluated in both aqueous and soil environments. • The recycled material achieved enhanced Cd(Ⅱ) adsorption while retaining high Pb(Ⅱ) removal capacity. • Phosphate-driven mineralization and ion exchange between hydroxyapatite and heavy metals enhance the immobilization. This study proposed a cascade utilization strategy for waste gypsum board by reusing phosphate-loaded pyrolyzed gypsum board (PGB150P) for Cd(Ⅱ) and Pb(Ⅱ) remediation in aqueous and soil environments. The results showed that PGB150 exhibited excellent Pb(Ⅱ) affinity (q max = 1396.14 mg/g) but limited Cd(Ⅱ) adsorption capacity (161.21 mg/g). PGB150P significantly enhanced Cd(Ⅱ) adsorption (403.84 mg/g) while retaining high Pb(Ⅱ) adsorption performance (1271.13 mg/g). In the Cd(Ⅱ)–Pb(Ⅱ) system, the adsorption capacities of Cd(Ⅱ) and Pb(Ⅱ) decreased to 170.17 and 980.05 mg/g, respectively, with Pb(Ⅱ) showing a stronger competitive advantage. Adsorption followed the Langmuir model and was spontaneous endothermic chemisorption controlled by film and intraparticle diffusion. PGB150P exhibited a broad pH adaptability and strong resistance to common coexisting ions. Mechanistic quantification revealed that Cd(Ⅱ) removal by PGB150P was dominated by precipitation (58.56%) and ion exchange (34.7%), while Pb(Ⅱ) removal was also dominated by precipitation (62.41%) and ion exchange (31.7%). Soil immobilization experiments showed that after 28 days treatment, PGB150P increased the residual fractions of Cd and Pb to 29% and 50%, respectively. In the Cd-Pb system, the residual fractions were increased to 15% and 49%, respectively. After five adsorption–desorption cycles, PGB150P retained about 71% of its Cd(Ⅱ) capacity and 93% of its Pb(Ⅱ) capacity. Cost analysis indicated a total cost of only 39–54 USD/t, substantially lower than that of adsorbents prepared with exogenous phosphate or commercial hydroxyapatite. This study provides theoretical support for the high-value utilization of construction solid waste and the remediation of multi-media heavy metal pollution. Download: Download high-res image (253KB) Download: Download full-size image
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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2026
·
IF 4
Ying Wang,Yi-Tong Du,Wen-Bo Yan,Zi-Tao Jiang,Jin Tan
BACKGROUND Cherry tomatoes are prone to postharvest deterioration and spoilage at room temperature, whereas chemical preservatives pose safety and environmental risks. Clove essential oil (CEO) has excellent antibacterial activity but is limited by high volatility, poor water solubility and dosage sensitivity. Cyclodextrin metal-organic frameworks (β-CD-MOFs) can improve CEO stability, but their poor processability and aqueous dispersibility hinder fruit preservation applications. Chitosan (CS), a natural hydrogel with film-forming and antibacterial properties, offers an ideal matrix to address these limitations. RESULTS A CEO-loaded CS/β-CD-MOFs composite coating (CS-CEO/MOFs) was constructed and evaluated on cherry tomatoes stored at 25 °C via physicochemical analysis, electronic eye color detection and texture profile analysis (TPA). Compared with control, CS and high-concentration CEO-chitosan (CS-CEO-H) groups, high-concentration CS-CEO/MOFs (CS-CEO/MOFs-H) delayed spoilage. Principal component analysis of electronic eye data showed the recognition index (a parameter reflecting the distinguishability of color characteristics among groups) increased from −3 (day 0) to 97–98 (days 6–21), indicating distinct inter-group ripening rate differences. TPA results indicated CS-CEO/MOFs-H slowed hardness decline (effect positively correlated with hydrogel concentration) and maintained higher soluble sugar, vitamin C and titratable acid contents, as well as reduced weight loss, extending room-temperature shelf life to 21 days. CONCLUSION The CS-CEO/MOFs coating combined the gas barrier property of CS and the controlled release capability of β-CD-MOF, forming a synergistic fresh-keeping mechanism. As a safe, natural preservative, it provides a promising solution to reduce cherry tomato postharvest losses and lays a foundation for the development of plant-derived composite preservatives with controlled-release and gas barrier synergistic properties. © 2026 Society of Chemical Industry.
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FOOD RESEARCH INTERNATIONAL
·
2026
·
IF 8
Feng Guo,Lijie Zhu,Kun Zhuang,Shangyuan Sang,Lei Chen,Qian Shen,Qi Zhang,Xianhui Chang,Wenping Ding,Xiuying Liu
Contamination of foodstuffs with harmful substances poses a significant food safety challenge. Deep eutectic solvents (DESs), being biodegradable and environmentally friendly, hold considerable potential for removing such contaminants from grain. In this study, water was introduced as a third component to form novel ternary deep eutectic water-based solvents (DEWSs). These were combined with soyasaponin to enhance the system's surfactant properties and improve removal efficiency. The research primarily investigated the removal efficacy, optimal conditions, and mechanisms of 12 DEWSs for the removal of harmful elements in grain. Experimental results indicate that the presence of water and specific concentrations of soyasaponin significantly enhanced the removal efficiency of three DESs (choline chloride + urea (DEU), choline chloride + citric acid (DEC), and choline chloride + xylitol (DEXY)) for harmful elements. Among these, DEWXY 3 (DEXY:H₂O = 1:1) and DEWC 2 (DEC:H₂O = 7:3) demonstrated optimal removal efficiencies for arsenic and cadmium, respectively, achieving 71.59% and 97.51%. Both the molecular interactions between DEWSs and As/Cd and the interfacial modulation provided by soyasaponin acted synergistically to promote the removal of As and Cd. This system significantly enhanced the removal of As and Cd while preserving the primary composition and structural integrity of brown rice flour, providing novel insights and technical references for food safety remediation.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）