Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Han Cui,Xuejiao Wu,Yuchen Wang,Yafei Zhang,Juan Luo,Dandan Zhou
This study investigates the migration of lead (Pb) during soil electrokinetic remediation (EKR) with sodium alginate (SA), providing important data on ion orientation and Pb removal efficiency. A 1 mV/cm voltage was applied to kaolinite contaminated with Pb²⁺, and SA was applied to regulate Pb migration. Pb was detected in both the anolyte and catholyte, with varying molar Pb/C ratios. In the anode and cathode chambers, the molar ratios reached 1:7.79 and 1:2.64, respectively. The addition of Pb 2+ disrupted the stable structure of SA, and density functional theory (DFT) calculations combined with X-ray Absorption Fine Structure (XAFS) analysis showed that Pb²⁺ forms dual-ridentate (positively charged) and quad-/hexaridentate (negatively charged) complexes with SA, thereby influencing Pb migration toward the corresponding electrodes. Additionally, Pb in the soil transformed into immobile particulate states, such as PbO 2 , Pb 3 O 4 , and PbO. The formation of these particulate phases and conversion of mobile Pb phases to the anode reduced the Pb migration ability at the cathode. These findings offer fresh perspectives on EKR’s application for heavy metal soil remediation, particularly six-period metals on the periodic table, improving our understanding of Pb behavior during electrokinetic treatments.
研究领域:
环境科学
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土壤化学
·
电化学
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重金属修复
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材料科学
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地球化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Xiaofei Liu,Hua Yin,Hang Liu,Yuhao Cai,Xin Qi,Zhi Dang
Due to the coexistence of various heavy metals in the contaminated environment, it is essential to comprehensively study the multicomponent adsorption of heavy metals in order to tackle these combined pollutants. Herein, the adsorption processes of Pb(Ⅱ), Cu(Ⅱ) and Cd(Ⅱ) by biogenic hydroxyapatite (BHAp) were investigated in single and multicomponent systems. The maximum adsorption capacity for Pb(Ⅱ), Cu(Ⅱ) and Cd(Ⅱ) by BHAp in single system reached 311.16, 82.05 and 92.54 mg g −1 , respectively, while adsorption capacity for Cu(Ⅱ) and Cd(Ⅱ) in multicomponent system decreased more obviously than that of Pb(Ⅱ). Furthermore, the stability of Cu(Ⅱ) and Cd(Ⅱ) adsorbed on BHAp was indeed influenced in multicomponent system. By means of the characterization analysis, it was found that ion exchange was more instrumental in the adsorption processes of Cu(Ⅱ) and Cd(Ⅱ) in single system than in multicomponent system. Significantly, it was observed that the proportion of generally stable Pb(II) adsorbed on BHAp exceeded 95% in both single and multicomponent systems. This result might be due to the in-site growth of stable crystals of Pb x Ca 10–x (PO 4 ) 6 (OH) 2 , which was synergistically induced by surface functional groups and inorganic mineral of BHAp, and was unaffected by the coexistence of Cu(Ⅱ) and Cd(Ⅱ).
研究领域:
环境科学
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材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Zi Yin,Jiangwen Liao,Guikai Zhang,Shouwei Zuo,Shengqi Chu,Lirong Zheng,Pengfei An,Huan Huang,Juncai Dong,Jing Zhang
Surface ligand passivation strategies have been extensively used to produce metal halide perovskite nanoparticles (NPs) with excellent optoelectronic properties, and a better understanding of the ligand–NP interactions is essential to unleash the full potential of perovskite NPs. Here, the well-passivated methyl ammonium lead bromide NPs were obtained when (3-aminopropyl) triethoxysilane (APTES) and oleic acid (OA) were involved as efficient dual surface ligands. We systematically explored ligand–NP interactions by using spectroscopic analysis and theory calculations. Our results demonstrated that –[−OOC–R]− from OA would preferably occupy the Br vacancies on the surface under-coordinated Pb sites in the corner-sharing octahedral framework to form [PbBr5]3–-[−OOC–R]− complexes, whereas –NH3+ of APTES can connect with Br– on the NP surface via hydrogen bonds. These surface binding interactions can trigger the lattice contraction of NPs, which can lead to an increased Pb2+ off-centering by promoting the lone pair stereochemical activity. Furthermore, the electronic band structure can be modulated by orbital interactions within the inorganic Pb–Br frame through the surface ligand effect. This work not only increases our understanding of ligand–NP interactions in terms of coordination geometry but also reveals their influence on the stereochemical activity of the Pb 6s2 electron pair, which will provide valuable inspiration for the ligand passivation strategies in the future.
研究领域:
材料科学
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物理化学
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Chao Xiong,Can Xue,Liyun Huang,Peng Hu,Ping Fan,Shixing Wang,Xiantai Zhou,Zujin Yang,Yongqing Wang,Hongbing Ji
Removal of Pb(II) from water is an important issue for improving water quality. However, the use of cost-effective and more environmentally friendly adsorbents to achieve highly-efficient adsorption capacity is still a challenge. A novel bio-sorbent (PP-DBD) is developed by functionalizing pomelo peels to remove Pb(II) in water. PP-DBD achieves the enrichment of Pb(II) (adsorption amount of 443.51 mg/g and removal rate of 99.98%) after 2 h and exhibits good selectivity and reusability (6 cycles). Isothermal studies show that adsorption is an irreversible process with positive synergism of multiple sites, and a active site has the ability to adsorb 1.29 Pb(II). The kinetics indicates that adsorption is chemisorption and the rate-limiting step is surface diffusion . The thermodynamic study reveals that the adsorption of Pb(II) is enhanced at higher temperatures by a spontaneous process. This study also shows that hydroxyl sites have a better affinity and easier charge transfer capacity to Pb(II) than amino sites on PP-DBD by DFT and FMOs calculations. In conclusion, PP-DBD is a promising adsorbent for the removal of Pb(II) in aqueous solution.
研究领域:
环境科学
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水处理
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材料科学
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化学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Fang-Fei Shi,Ling-Xin Kong,Wei-Zhun Dong,De-Zhong Cao,Gang-Jin,Ying Liang,Kun-Shan Yang
Post-modification of metal-organic framework (MOF) materials is an effective means to enhance their efficient and selective adsorption for heavy metal ions . In this article, we presented a reflection-type optical fiber surface plasmon resonance (SPR) sensor based on dual core fiber (DCF) coated with UiO-66-RSA (UiO-66-NH 2 post-modified with resorcinol aldehyde) film for the specific detection of Pb(II) in aqueous media . The composite material UiO-66-RSA exhibits stronger affinity and specificity for Pb(II) than UiO-66-NH 2 . The adsorption of Pb(II) can change the equivalent refractive index (RI) of UiO-66-RSA film, causing a regular shift in SPR spectra. Experiments have shown that the limit of detection (LOD) of the SPR Pb(II) sensor can reach 0.1 nM. Meanwhile, research has found that the SPR sensor is accompanied by temperature crosstalk of 0.356 nm/°C. Therefore, we constructed a Michelson temperature interferometer using polymer micro tips on the end face of the fiber core to achieve temperature compensation. Based on the above two sensing channels, dual parameter demodulation of Pb(II) concentration and temperature can be achieved with an error rate of less than 0.5 %. This article has potential research value in exploring the application of post modification techniques of MOF in fiber optic lead ion detection.
研究领域:
材料科学
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光学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Xue Xue Liang,Xiao-Kun Ouyang,Songyan Wang,Li-Ye Yang,Fangfang Huang,Chao Ji,Xiaohong Chen
The performance of Fe 3 O 4 /attapulgite (APT) nanoparticles in Pb(II) adsorption from aqueous solutions could be improved by modifying the particles with aminopropyltriethoxysilane (APTS) and then combining with chitosan (CS) into beads. After preparing the APTS-Fe 3 O 4 /APT@CS beads, their surface morphology and crystal phases were analyzed by Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. The magnetic properties of APTS-Fe 3 O 4 /APT@CS were studied by a vibrating sample magnetometer, while their heat resistance and stability were characterized by thermal weight analysis. A recycling test and comparison of adsorption capacities were also carried out. The adsorption capacity of Fe 3 O 4 /APT was improved by the modification with APTS and CS. The adsorption process conforms to the pseudo-second-order kinetic and Langmuir adsorption isotherm models. The adsorption of Pb(II) reaches a maximum of 625.34 mg/g, which compares favorably with other reported adsorbents. The results show that APTS-Fe 3 O 4 /APT@CS is a promising hybrid adsorbent for effective removal of Pb(II) from water.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Jiujiang Ji,Guo Chen,Jun Zhao
To explore the effect of coexisted amino and thiol groups on adsorption of heavy metal, a novel magnetic nanoparticle was prepared by sequentially modification with (3-Chloropropyl) trimethoxysilan, polyetherimide, epichlorohydrin and thiourea. Subsequently, it was characterized by TEM, N 2 adsorption/desorption, FTIR Spectroscopy, zeta potential, and VSM. The maximum adsorption capacity for Pb 2+ , Cd 2+ and Cu 2+ reached 110.13 mg·g −1 , 40.23 mg·g −1 and 29.37 mg·g −1 , respectively. The adsorption of the magnetic nanoparticles with different surface group for heavy metals were compared, which indicated that the amino and thiol group played an important role in the adsorption of heavy metals. Especially, the adsorption capacity increased dramatically after modification with the thiol group, which was attributed to the synergistic coordination of −NH 2 and −SH. The adsorption kinetics is consistent with the quasi-second-order kinetics equation, and the adsorption thermodynamic process is consistent with the Langmuir isotherm equation. The effects of experimental conditions, such as pH, the concentration of metals, adsorption time and temperature, on adsorption of Pb 2+ were studied in detail. In addition, over 90% of removal rate was remained after 6 cycles. The magnetic nanoadsorbents was a promising nanoadsorbent with high adsorption speed, simultaneous adsorption of various heavy metals, strong anti-interference ability and reusability.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Ting-Ting Li,Zhike Wang,Hai-Tao Ren,Hao-Kai Peng,Xiao Zhang,Qian Jiang,Ching-Wen Lou,Jia-Horng Lin
This study reports a novel adsorbent structure and shows the satisfactory removal performance of Pb(II) and Ni(II). The fabric structure increases the strength of the hydrogel. The hydrogel plays a major role in the composite structure as a matrix, while the fabric bears the applied load and protects the structure from mechanical damage. The double-network composite hydrogel is reinforced by plasma grafted polylactic acid melt-blown non-woven fabric and polyethylene glycol dimaleate, and its compressive strength reaches 40.6 kPa at 60% strain. The interface substantially improves the compression strength by 42.9%. Through the adsorption isotherm model, the adsorption capacity of the hydrogel for Pb(II) and Ni(II) reaches 233.12 and 165.06 mg/g, respectively, and the removal rate of heavy metal ions in water at low concentrations exceeds 95%, showing the excellent removal rate of heavy metals. Even after the fifth cycle, the removal efficiency barely declines, indicating the feasibility of repeatedly use. Cost analysis reveals that the adsorbent is relatively low cost, solving the problems of difficult recovery, low strength, and easy damage of hydrogel adsorbents, and promoting the industrial application of hydrogels as adsorbents.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 2
·期 8
·2599-2608
·
IF 0
Xingqi Wang,Wenxia Liu,Jian Tian,Zhenhuan Zhao,Pin Hao,Xueliang Kang,Yuanhua Sang,Hong Liu
Uniform well-defined nanostructured BiOBr microspheres have been fabricated via a simple hydrothermal method in the presence of cetyltrimethylammonium bromide (CTAB) and ethylene glycol (EG). The heavy metal ion adsorption on the as-synthesized nanostructured BiOBr microspheres was systematically assessed by measuring the residual concentration during the adsorption process using a colorimetric method for Cr(VI) concentration, and an extraction-colorimetric method for Cd(II) and Pb(II) concentrations. The nanostructured BiOBr microspheres showed good removal capacity for heavy metal ions (Cr, Cd, Pb), and excellent adsorption properties for low concentration heavy metal ions, indicating potential applications in water purification. Based on the quick and efficient heavy metal ion removal ability of nanostructured BiOBr microspheres, a continuous filtering-type water purification device was designed and constructed. In using this continuous filtering type water purification device, 1 g of adsorbent can purify about 4900 g of Pb(II) contaminated water, 5900 g of Cd(II) contaminated water, or 21 500 g of Cr(VI) contaminated water having initial concentrations of 200 μg L−1 to successfully attain the World Health Organization standard for drinking water. The good removal capacity can be attributed to the hierarchical nanostructure, which displays a large specific surface area and strong adsorption of heavy metal ions.
研究领域:
材料科学
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环境科学
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产品关联
DOI
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
·
2025
·Vol. 113
·期 9
·e35646
·
IF 3.4
Huiwen Wang,Yuting Wu,Mingrui Dai,Tingting Zhu,Daming Wu,Diya Leng
To investigate the antibacterial effect, mechanism, and cytotoxicity of Prussian blue/Cerium dioxide (PB/CeO 2 ) nanoparticles against Enterococcus faecalis (E. faecalis) and biofilm. PB/CeO 2 nanoparticles were synthesized and characterized. The antibacterial mechanism of nanoparticles was explored through peroxidase (POD) activity assay, hydroxyl radicals (·OH) detection, and measurement of bacterial reactive oxygen species (ROS) and glutathione (GSH)/glutathione disulfide (GSSG) levels. The biocompatibility of PB/CeO 2 was evaluated by Cell Counting Kit-8 (CCK-8) assay and histological examination of the major visceral organs of rats. The antibacterial effect of PB/CeO 2 was assessed using the colony-forming unit (CFU) method. The impact of PB/CeO 2 on E. faecalis biofilm on dentin slices was further observed with CLSM and SEM. ANOVA and t -test were applied for statistical analysis ( p < 0.05). PB/CeO 2 demonstrated significant antibacterial activity against E. faecalis , mainly when used with H 2 O 2 , significantly enhancing its antibacterial effect and effectively disrupting E. faecalis biofilms on dentin slices. PB/CeO 2 nanoparticles catalyzed ROS production, disrupting the antioxidant defense system of E. faecalis cells, damaging bacterial cell membranes, and ultimately causing bacterial death. PB/CeO 2 nanoparticles exhibit good biocompatibility at appropriate concentrations in vivo and in vitro. The novel multifunctional nanocomposite shows great antibacterial effects against E. faecalis and its biofilm, with low cytotoxicity and good biocompatibility, offering a novel disinfection strategy for root canal treatment.
研究领域:
纳米技术
·
微生物学
·
牙科
·
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Lang Bian,Xudong Qi,Kai Li,Jinhui Fan,Zhanmiao Li,Enwei Sun,Bin Yang,Shuxiang Dong,Wenwu Cao
Ternary 0.552Pb(Ni 1/3 Nb 2/3 )O 3 -xPbZrO 3 -(0.448-x)PbTiO 3 (PNN-PZ-PT) ceramics near the triple point compositions were fabricated by an improved two-step sintering method. The triple point composition 0.552PNN-0.135PZ-0.313PT ceramic has outstanding piezoelectric performance with piezoelectric coefficient d 33 = 1200 pC/N. Its easy fabrication and low cost make this piezoelectric material an excellent candidate for high sensitivity sensors and ultrasonic transducers. The evolution of domain structures for ceramics with composition near the triple point provides deeper insight into the mechanism of ultrahigh piezoelectric properties of PNN-PZ-PT ceramics.
研究领域:
材料科学
·
电陶瓷
·
压电材料
·
传感器与执行器
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Jiamiao Zhong,Hongli Zhao,Yaxin Cheng,Tong Feng,Minbo Lan,Shaohua Zuo
Lead is one of the most common toxic heavy metals in the environment and it is easily accessible by the human body because there are residues in daily necessities and food. Therefore, it is significant to develop the high-performance detection method of lead ion (Pb(II)) in the environment and food. In this work, a sensitive and selective electrochemical sensing platform of Pb(II) was successfully constructed based on dopamine polymer doped polypyrrole (PDA-PPy) hydrogel modified screen-printed carbon electrode (SPCE) (noted as PDA-PPy/SPCE). PDA-PPy hydrogel was prepared by the hybridization of dopamine hydrochloride and pyrrole through a rapid and eco-friendly one-step synthesis method. Combined the selective adsorption capacity and good conductivity of PDA-PPy hydrogel, it was employed as the modified material for electrodes to achieve signal amplification. The result showed that PDA-PPy/SPCE exhibited excellent sensing performance towards Pb(II) with low detection limit of 0.15 μg L -1 and high sensitivity of 0.17 μg L -1 μA -1 . Besides, acceptable recoveries were shown in real sample analysis, indicating that it has application prospects.
研究领域:
分析化学
·
环境科学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）