Plants-Basel
·
2022
·Vol. 11
·期 19
·2487
·
IF 4.658
Yifei Zhang,Yishan Sun,Weiqing Li,Jiayu Li,Rongqiong Xu,Jiarui Du,Zesong Li,Guibin Li,Kejun Yang
To explore the effects of iminodisuccinic acid (a chelating agent) on maize (Zea maysL.) seed germination under lead (Pb) stress, we comparatively analyzed the effects of applying different concentrations of iminodisuccinic acid (0, 5, 20, and 100 mmol·dm−3) and combined an addition of exogenous substances regulating reactive oxygen species production on maize seed germination, seedling growth, H2O2content, NADPH oxidase activity, and antioxidant enzyme activities under Pb-stressed and Pb-free conditions. Iminodisuccinic acid (100 mmol·dm−3) significantly delayed seed germination under normal germination conditions and alleviated the inhibitory effects of Pb stress (20 mmol·dm−3) on seed germination. Under normal conditions (without Pb stress), the iminodisuccinic acid-induced inhibition of seed germination was enhanced by treatment with dimethylthiourea (a specific scavenger of reactive oxygen species) or diphenyleneiodonium chloride (a specific inhibitor of NADPH oxidase), but diminished by treatment with H2O2, CaCl2, diethyldithiocarbamic acid (a specific inhibitor of superoxide dismutase), or aminotriazole (a specific inhibitor of catalase). Under Pb stress, iminodisuccinic acid partially eliminated the excessive H2O2accumulation, improved superoxide dismutase and catalase activity, and weakened the high NADPH oxidase activity. In addition, Ca2+chelation may be essential for maintaining the reactive oxygen species’ balance and improving seed germination and seedling growth by iminodisuccinic acid supplementation in maize under Pb stress. The proposed iminodisuccinic acid supplementation-based method improved maize seed germination in Pb-polluted soil.Keywords:maize;chelator;lead stress;ROS;hydrogen peroxide;NADPH oxidase;seed germination
研究领域:
植物学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Qiao Zhang,Wei Shi,Wenmei Tan,Zhengfeng Xie
The construction of polymer/phosphazene organic-inorganic hybrids using biomass can improve the sustainability of their preparation. In addition, introducing diverse functional units to these hybrids is a potential way to broaden their downstream applications. Herein, a benzoxazine derivative (AP-f), prepared from biomasses (apigenin and furfurylamine), is used as starting materials to construct a polymer/phosphazene hybrid. Through efficient benzoxazine-isocyanide-mechanochemistry (BIC-MC), a bio-polyamide derivative (PA-af) containing diverse molecular fragments (amide, phenolic hydroxyl, and tertiary amine) is prepared by solid-state ball-milling. Using PA-af as a phenolic source, a novel polyamide (PA)/phosphazene organic-inorganic hybrid (PACP-af) is successfully constructed by condensation with hexachlorocyclotriphosphazene (HCCP). PACP-af shows selective adsorption for cationic dye methylene blue (MB). Experimental results show that the maximum adsorption capacity of MB by PACP-af reaches 598.4 mg/g, and the adsorption process followed the pseudo-second-order kinetic and Langmuir adsorption model. PACP-af is also used as an enrichment-type Pb (II) electrochemical probe with an acceptable detection range (1–100 μM) and detection limit (0.085 μM).
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 11
·6821-6830
·
IF 4.036
Jinling Gao,Mingzhe Song,Tongtong Li,Yuyao Zhao,Anxu Wang
Nanocomposites play a key role in the removal of toxic metal(loid)s from environmental water. In this study, we investigated the adsorption capability of water-soluble carboxymethyl chitosan (WSCC)-modified functionally oxidized single walled carbon nanotubes (oSWCNTs) for rapid and efficient removal of toxic Pb(II) from water. The WSCC–oSWCNTs nanocomposite was prepared by an acid treatment of SWCNTs followed by an ultrasonic dispersion process using WSCC as dispersant. The morphology and chemical characteristics of the WSCC–oSWCNTs nanocomposite were further identified using various characterization techniques (i.e., transmission electron microscopy, TEM; scanning electron microscopy, SEM; Raman spectra; Fourier transform infrared spectroscopy, FTIR; X-ray photoelectron spectroscopy, XPS; nitrogen adsorption–desorption isotherm test). The efficiency of the adsorption process in batch experiments was investigated via determining various factor effects (i.e. WSCC–oSWCNTs nanocomposite concentration, solution pH, initial Pb(II) concentration, contact time, and reaction temperature). Kinetic results showed that the adsorption process followed a pseudo-second-order, while an isotherm results study showed that the adsorption process followed the Langmuir and Freundlich isotherm models at the same time. In addition, the van't Hoff equation was used to calculate thermodynamic parameters for assessing the endothermic properties and spontaneity of the adsorption process. The WSCC–oSWCNTs nanocomposite manifested a high adsorption capacity for Pb(II) (113.63 mg g−1) via electrostatic interactions and ion-exchange, as its adsorption rate could reach up to 98.72%. This study, therefore, provides a novel adsorbent for the removal and detection of harmful residues (i.e. toxic metal(loid)s) from environmental water, such as industry wastewater treatment and chemical waste management.
研究领域:
环境科学
·
纳米技术
·
水处理
·
环境化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOM
·
2022
·Vol. 74
·期 3
·915-923
·
IF 2.597
Fu Chengcheng,Ru Juanjian,Hua Yixin,Xue Yu,Bu Jiaojiao,Wang Zhiwei,Zhang Yuan
For the decontamination of Pb in a contaminated Sb alloy, the separation behaviors of Sb and Pb are investigated in choline chloride-ethylene glycol deep eutectic solvent (ChCl-EG DES) at 323–363 K. Linear sweep voltammetry measurements are recorded for determining the electrochemical behaviors of Sb and Pb in a 0.1-M SbCl 3 +ChCl-EG solution. The oxidation potentials of Sb and Pb are + 0.021 V and − 0.05 V at 323 K, respectively, which implies that the addition of SbCl 3 benefits the dissolution of Sb, while that of Pb is opposite. In addition, the reduction potential of Sb(III) is more positive than that of Pb(II), which suggests that the separation of Sb from the Pb-containing Sb alloy is feasible. The effects of temperature and current density are discussed during the electrorefining process. The results show that high-purity Sb powders (99.978%) can be obtained at 30 mA cm −2 and 343 K, and that the current efficiency is about 95.42%.
研究领域:
材料科学
·
冶金学
·
环境化学
·
应用电化学
·
资源回收
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Muhammad Usman,Adeel Ahmed,Zhijian Ji,Bing Yu,Youqing Shen,Hailin Cong
Heavy metals and endocrine disrupters often co-exist in wastewater, while their possible competition behaviours make uptake removal more challenging. Therefore, β-Cyclodextrin based nanocomposite adsorbent was successfully fabricated (β-Cyclodextrin/ZrO 2 ) for the simultaneous uptake of Pb(II) and Bisphenol A from wastewater. FTIR, XRD , and XPS confirmed the successful fabrication of the β-Cyclodextrin/ZrO 2 nanocomposite. In this setting, oxygen-containing groups are primarily responsible for the Pb(II) binding, while the β-Cyclodextrin cavities adsorb Bisphenol A through host-guest interaction, enabling the simultaneous removal of Pb(II) and Bisphenol A. In the mono contaminant system, the nanocomposite displayed prominent removal ability toward Pb(II) and Bisphenol A with adsorption characteristics of pseudo-second-order, Langmuir, and Freundlich isotherm model. The maximum adsorption capacities were identified for Pb(II) and Bisphenol A to be 274.4 mg/g and 174.9 mg/g at 298 K, respectively. Most importantly, the β-Cyclodextrin/ZrO 2 could efficiently attain simultaneous removal of Pb(II) and Bisphenol A by avoiding their competitive behaviours was due to the different adsorption mechanisms (electrostatic interaction and host-guest interaction). Moreover, the adsorbed Pb(II) and Bisphenol A could be successfully recovered with a slight decline in nanocomposite removal performance even after 4 cycles in the binary-component system. All these findings provide insights into the fabrication of highly effective adsorbent with separated adsorption sites to treat wastewater bearing heavy metal and endocrine disrupters.
研究领域:
环境科学
·
纳米技术
·
水处理
·
材料科学
·
吸附技术
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Hanna Pei,Jing Wang,Qingfeng Yang,Weixia Yang,Na Hu,Yourui Suo,Daohong Zhang,Zhonghong Li,Jianlong Wang
Lead(II) is a highly toxic upon accumulation in the human body and a thorough cleanup of this pollutant in water resources has become a rising worldwide concern. In this study, multi-functional nitrogen-doped carbon-MoS 2 (NC-MoS 2 ) nanohybrid composite was successfully synthesized by a step-by-step approach and applied as an effective heavy metal ions adsorbent. Scanning electron microscopy and energy dispersive X-ray spectrometer analysis presents multilayer irregular nanosheets and reveals the uniform distribution of C, N and O elements in the fabricated nanomaterials , respectively. Powder X-ray diffraction, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirm the functionalization of oxygen-containing functional groups arising from the nitrogen-doped carbon. Particularly, the NC-MoS 2 possesses an excellent adsorption capacity (439.09 mg g −1 ) for Pb(II), which attributes to the integrated physicochemical adsorption resulting from the oxygen-containing functional groups on the surface of nanohybrid composites. The as-prepared NC-MoS 2 exhibits good chemical stability and can be reused 7 times with a slight fading over 80% during cycling, which is essential for its practical applications. All of these demonstrate that NC-MoS 2 can be an efficient material for selectively removal of Pb(II), which suggest its great potential in the utilization of environmental cleanup .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Songlin Wang,Nan Jiang,Yanyan Liu,Yan Hao,Qiying Zhang,Hongying Niu,Jianji Wang
Methyl phenyl carbonate (MPC) is a versatile carbonate, particularly as an important component in the lithium-ion battery industry. Recently the green synthesis of carbonates from non-toxic feedstocks and efficient catalysts have attracted a considerable amount of interest but the development of a highly active catalyst for this synthesis is a great challenge. Herein, novel Pb-Mg thin nanosheet catalysts with high specific areas and large pore volumes were developed by one-pot hydrothermal approach for the synthesis of MPC without using any solvent. The nanosheets were thoroughly characterized by SEM-EDS, TEM , XPS , NH 3 -TPD, XRD , BET, and H 2 -TPR techniques. It is shown that a diphenyl carbonate (DPC) conversion of 56.6% and an MPC selectivity of 98.8% are achieved by a Pb-Mg nanosheet catalyst with 15 wt% Pb. The activity and selectivity values are significantly higher than the previous best value reported by using transition metal-based catalysts. After the reaction, the nanosheets can be separated by simple centrifugation and can be reused many times without a significant loss of catalytic activity, showing excellent stability and recyclability. A possible mechanism was investigated based on these results. This work provides new insight into accomplishing the efficient and green synthesis of MPC and offers a strategy for synthesizing other asymmetric carbonates.
研究领域:
化学工程
·
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Wenqiang Wang,Guanghui Zhang,Lihua Dong,Ping Gu
Heavy metals frequently coexist with organic ligands in water as heavy metal complexes, which are difficult to remove routinely. In this study, a novel EDTA-based covalent organic framework (COF-EDTA) was synthesized at room temperature through the incorporation of EDTA into a hydroxyl-functionalized COF (COF-OH) for enhanced removal of both free Pb(II) and Pb(II)-citrate complexes. Structural and compositional properties of the materials were analyzed via PXRD, FTIR, and 13 C NMR, while surface morphology, elemental distribution, specific surface area, and thermal stability were examined by TEM, SEM-EDS, BET, and TGA, respectively. Pb(II) adsorption experiments were subsequently performed to assess removal efficiency. In the single Pb(II) system, EDTA modification significantly improved the adsorption performance, with the equilibrium adsorption amount increasing from 38.51 mg/g (COF-OH) to 135.6 mg/g (COF-EDTA), an increase of approximately 252%. COF-OH adsorbed Pb(II) via coordinate and hydrogen bonding, while the significant adsorption of Pb(II) by COF-EDTA was attributed to chelation and ion exchange. In the Pb(II)-citrate binary system, COF-EDTA preferentially adsorbed free Pb 2+ at a citrate-to-Pb(II) molar ratio of 0.5:1. When Pb-Citrate − is the dominant species (> 93%), COF-EDTA enhanced removal of Pb(II) through ligand displacement (primary pathway, ~75% efficiency) coupled with intact adsorption of Pb-Citrate − complexes (secondary pathway, ~25%). The DFT calculation validated the feasibility of ligand displacement mediated Pb(II) capture by COF-EDTA, while COF-OH lacked this capability. This work provides critical guidelines for exploring novel adsorbents to enhance the removal of heavy metal complexes.
✓ 已验证
产品关联
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 84
·期 12
·3726-3737
·
IF 1.915
Wang Penghui,Liu Wenli,Xu Hongxiang,Liu Guowei
An acid modified approach to enhance the adsorption capacity of low-rank coal (lignite) is proposed to reduce the risk of heavy metal ions within the wastewater. Adsorption kinetics, adsorption thermodynamics, adsorption coefficient and density functional theory DFT calculations were studied in this paper, respectively. The results indicate that the adsorption capacity of lignite was enlarged after HNO 3 modification, and pseudo-second order kinetics model and Langmuir isothermal adsorption model can be used to describe the adsorption process. The surface chemical properties of lignite play a dominant role rather than the specific surface area and total pore volume in the Pb(II) cation adsorption process, and it is suggested that the adsorption of Pb(II) cation by raw lignite (RL) and modified lignite (ML) is mainly completed by chemical adsorption. The Fourier transform infrared spectroscopy (FTIR) characterization showed that the surface oxygen functional groups of lignite increased after modification. The results of interaction energies between the model molecule and Pb(II) cation show that Pb(II) cation and -C-O-C are most easily combined, followed by -COOH, and -C = O is the weakest. The adsorption mechanisms of raw and modified lignite and Pb(II) cation were summarized. The original hemidirected structure of Pb(II) cation is broken, and a polar covalent bond is formed. A large number of flocculent precipitates were generated rapidly with the chelating reaction between humic acid molecules and Pb(II) cation. The adsorption of Pb(II) cation by lignite was a chemical adsorption process.
✓ 已验证
DOI
高影响因子
Environmental Technology & Innovation
·
2026
·
IF 7.3
Yufei Gao,Zhao Gao,Qiqi Zheng,Jinjie Lv,Chuang He,Wenjie Zhang,Lei Xu,Haijie He
Cement-based solidification/stabilization (S/S) is an effective technique for remediating heavy metal-contaminated soils, yet its practical application in farmland is constrained by the high cement dosage commonly required and the limited chemical stabilization capacity of conventional systems. In this study, highly dispersible graphene quantum dots (GQDs) are introduced as multifunctional additives to enhance the S/S performance of ordinary Portland cement toward Pb- and Cd-contaminated soils at a cement dosage of 15 wt%. The incorporation of GQDs markedly improves heavy metal immobilization, and the optimum dosage of 0.4 wt% reduces the leaching concentrations of Pb and Cd by 81.7% and 84.4%, respectively, compared with the control sample. Meanwhile, Tessier fractionation shows that GQDs promote the transformation of both metals from labile fractions to more stable forms, with the residual fractions of Pb and Cd increasing from 37.53% to 42.74% and from 49.87% to 56.39%, respectively. Multi-scale characterization further reveals the underlying enhancement mechanism. XRD, FTIR, TG/DTG, and SEM analyses demonstrate that GQDs accelerate cement hydration, promote the formation of C–S–H gel, and refine the microstructure, thereby generating a denser solidified matrix that strengthens physical encapsulation. In parallel, aqueous removal experiments provide supporting evidence for the direct interaction between GQDs and heavy metal ions, while molecular dynamics simulations further reveal GQD-metal interfacial interactions at the atomic scale. These results demonstrate that GQDs enhance heavy metal immobilization through the synergistic effects of hydration promotion and surface chemical interaction, offering an effective strategy for developing high-efficiency low-cement S/S systems for contaminated farmland soil remediation.
✓ 已验证
DOI
高影响因子
NEUROTOXICOLOGY
·
2026
·
IF 3.8
Yongke Yuan,Mengchen Liu,Mengdi Zhai,Meijia Wu,Wenhui Zhang,Yongjuan Xin,Yue Ba,Yu Zhang,Lin Han,Lihua Gao,Hui Huang
Environmental lead (Pb) exposure and high-fat diet (HFD) intake are known to trigger massive neuronal apoptosis that contributes to neurologic dysfunction. Previous studies mainly focused on isolated mitochondrial dysfunction, autophagy-lysosomal pathway damage, and neuronal apoptosis from Pb or HFD. Nevertheless, the precise role of the lysosomal and proteasomal clearance processes in promoting neuronal cell death induced by Pb and HFD remains unclear. In this study, male Sprague-Dawley (SD) rats were employed to elucidate the mechanisms underlying Pb-induced neurotoxic mitochondrial apoptosis and to investigate the effects of co-exposure to HFD. In vitro , PC12 cells were treated with Pb and palmitic acid (PA) to mimic the in vivo conditions. Specifically, such exposures prompted the translocation of cathepsin B (CTSB) from lysosomes to the cytosol and downregulation of lysosomal-associated membrane protein 1 (LAMP1), ATPase H⁺ Transporting V1 Subunit A (ATP6V1A), and Bcl-2 within rat cortex. In contrast, the levels of pro-apoptotic factors including BID, Bax, mitochondrial cytochrome C (Cyt C), and caspase 3 were significantly elevated. We also observed a significant decrease in the fluorescence intensity of lysosomes while lysosomal pH was ascertained to have ascended appreciably. Concurrently, CTSB inhibition by CA-074 me prevented neural apoptosis processing triggered by Pb and/or PA via mitigating lysosomal damage and mitochondrial Cyt C translocation, indicating that CTSB is a key mediator in the apoptotic process induced by Pb and HFD.
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Xin Li,Qiao-Hui Zhong,Jia-Kai Guo,Mei-Ju Li,Gao-Bin Chu,Jie Li
N235 extraction resin enables efficient Pb separation from geological reference materials. • Matrix are removed with dilute HBr and water, followed by Pb separation using low-concentration HBr. • The purified Pb is ready for MC-ICP-MS analysis without any evaporation step. • The method reliability is validated using various reference materials. • Pb isotope ratios of JA-1a are reported for the first time. Lead isotopic variations provide crucial insights into geochemical reservoirs, environmental sources, and geological ages. To obtain precise Pb isotope data by MC-ICP-MS, we develop a simple and efficient separation procedure using trialkyl amine (N235) resin. Batch experiments show that N235 strongly adsorbs Pb in 0.4 mol L −1 HBr, weakly in HCl, and not at all in HNO 3 media. Specifically, the optimized column procedure achieved high Pb recovery (94.5%) and eluted Pb in 0.5 mol L −1 HNO 3 , allowing direct measurement without evaporation, thereby reducing procedural blanks. The method was validated with ten reference materials (GSR-1, GSR-2, GSR-3, GSR-7, GSP-2, BHVO-2, JA-2, JG-2, JB-2, and JA-1a). Measured 206 Pb/ 204 Pb, 207 Pb/ 204 Pb and 208 Pb/ 204 Pb ratios agreed with published values within uncertainty, with external reproducibility better than 0.05% (RSD). Owing to its simplicity, high recovery, low blank, and low cost, this method offers a practical pretreatment strategy for high-precision Pb isotope analysis in diverse geological samples. A very simple, low-blank, and effective Pb purification method with a self-made trialkyl amine extraction resin is developed to separate Pb from geological reference materials for high precision determination of Pb isotopic compositions by MC-ICP-MS. Download: Download high-res image (254KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）