Nature Communications
·
2023
·Vol. 14
·期 1
·1-14
·
IF 16.6
Luo Huaiqing,Li Pengwei,Ma Junjie,Li Xue,Zhu He,Cheng Yajie,Li Qin,Xu Qun,Zhang Yiqiang,Song Yanlin
Despite the remarkable progress made in perovskite solar cells, great concerns regarding potential Pb contamination risk and environmental vulnerability risks associated with perovskite solar cells pose a significant obstacle to their real-world commercialization. In this study, we took inspiration from the ensnaring prey behavior of spiders and chemical components in spider web to strategically implant a multifunctional mesoporous amino-grafted-carbon net into perovskite solar cells, creating a biomimetic cage traps that could effectively mitigate Pb leakage and shield the external invasion under extreme weather conditions. The synergistic Pb capturing mechanism in terms of chemical chelation and physical adsorption is in-depth explored. Additionally, the Pb contamination assessment of end-of-life perovskite solar cells in the real-world ecosystem, including Yellow River water and soil, is proposed. The sustainable closed-loop Pb management process is also successfully established involving four critical steps: Pb precipitation, Pb adsorption, Pb desorption, and Pb recycling. Our findings provide inspiring insights for promoting green and sustainable industrialization of perovskite solar cells.
研究领域:
材料科学
·
环境科学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Song Ningbo,Yin Wanzhong,Xie Yu,Yao Jin
Using seawater for mineral flotation conserves fresh water resources and offers significant environmental and economic benefits. However, the adverse effect of seawater restricts its application in mineral flotation. The regulators can eliminate the adverse effect caused by seawater during flotation separation of lead and copper. In this paper, the flotation separation of galena and chalcopyrite in seawater was tested. Compared with those in deionized water, the lead grade of concentrate in seawater flotation declined from 50.10% to 48.90%. Meanwhile, the recovery of galena declined from 74.33% to 60.58% and the SI value declined from 1.565 to 1.324. With the addition of SHMP (sodium hexametaphosphate), SS (sodium silicate) and EDTA (ethylenediamine tetraacetic acid), the SI value increased from 1.324 to 1.923, 2.002 and 1.939, respectively. Noteworthy, when EDTA was excessive, the grade of Pb was 60.80%, the recovery of galena was 60.86% and the SI value was 2.113. X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Atomic force microscopy, Density functional theory calculation and E-DLVO calculation verified the micro-flotation results and revealed the mechanism of action.
研究领域:
矿物加工工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Long Zhou,Na Li,Xiaoying Jin,Gary Owens,Zuliang Chen
A n Fe@ZIF-8 composite, which combined the tailorable porosity of ZIF-8 with the versatile functionality of Fe nanoparticles ( n Fe), was synthesized for Pb(II) removal. Batch adsorption experiments showed that more than 95.3% of Pb(II) was removed from aqueous solution at an initial concentration of 50 mg L −1 when using n Fe@ZIF-8 within 60 min at pH value of 5. The mechanism of Pb(II) removal was studied via characterization of changes the morphology, size and composition of in n Fe@ZIF-8 before and after exposure the solutions containing Pb(II). Specifically, Fourier transform infrared (FTIR) and X-ray powder diffraction (XRD) indicated that n Fe@ZIF-8 was successfully synthesized and also remained stable after Pb(II) removal. Transmission Electron Microscope (TEM) and Scanning electron microscopy-X-ray energy dispersive spectrometer (SEM-EDS) both confirmed that Pb(II) was partially adhered onto the surface of n Fe@ZIF-8, where X-ray photoelectron spectroscopy (XPS) specifically revealed the existence of Pb(0) on the surface. This indicated that Pb(II) was initially adsorbed onto the surface of n Fe@ZIF-8 and subsequently reduced to Pb(0). Moreover, Pb(II) removal fit well to kinetics of absorption and reduction. Finally, in practice, n Fe@ZIF-8 could remove 96.3% of Pb(II) from an electroplating wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shengjie Hu,Rumeng Zhao,Yuchen Tang,Tingjuan Gao
Soil and groundwater contamination by lead and cadmium poses significant environmental and health risks, necessitating the development of rapid and accurate field monitoring techniques, which are currently lacking. Although solid-phase colorimetric microProbing imaging offers a promising solution, fine-tuning the hydrophilic/hydrophobic microenvironment of lead or cadmium molecular sensors within the microProbing material is essential for achieving rapid and accurate detection. Here, we report a method to covalently bond xylenol orange (a lead sensor) or physically adsorb dithizone (a cadmium sensor) onto the hydrophilic or hydrophobic entities of TentaGel resins, enabling uniform sensor loading, selective sequestration, and rapid microProbing of soil and groundwater lead or cadmium. Through microenvironment fine-tuning, the method achieved high sensitivity, with detection limits of 28 ppm and 9.9 ppb for soil and groundwater lead, and 50 ppb and 6.8 ppb for soil and groundwater cadmium, respectively. It accurately detected soil and groundwater lead from an economic development zone in Shenzhou (Hebei Province) and cadmium from a mine in Daye (Hubei Province), China. A portable microProbing device was also custom-designed and fabricated. With this device, the microProbing method shows great promise for field monitoring of other heavy metals in contaminated lands.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Geochemistry
·
2024
·
IF 2.6
Guanghui Li,Zheyi Zhang,Qian Wei,Fen Jiao,Congren Yang,Wei Li,Wenqing Qin
In this study, a new process of pre-flotation decarbonization‑lead flotation‑zinc flotation was proposed to recover valuable metals from a lead‑zinc ore in Guizhou by beneficiation and to determine a reasonable and economic beneficiation process. The results of the study demonstrate that the novel process aids in the flotation of lead and zinc ores in two ways: (1) pre-decarbonization using MIBC (methyl isobutyl carbinol) and kerosene synergistically achieved the lowest loss of lead recovery of 1.94 % and zinc recovery of 1.14 % in the decarbonized product. (2) the successful separation and retrieval of lead and zinc metals were accomplished via a preferential flotation technique, using several combinations of reagents. This procedure yielded a lead recovery rate of 87.64 % and a zinc recovery rate of 94.09 %.
研究领域:
矿物加工工程
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Yu Liu,Ruiqi Fu,Yue Sun,Xiaoxin Zhou,Shams Ali Baig,Xinhua Xu
In this study, EDTA-functionalized Fe 3 O 4 (Fe 3 O 4 @SiO 2 -EDTA) was prepared by silanization reaction between N-(trimethoxysilylpropyl) ethylenediamine triacetic acid (EDTA-silane) and hydroxyl groups for Pb(II) and Cu(II) removal from aqueous solutions. Fe 3 O 4 @SiO 2 -EDTA composites were characterized using SEM, TEM, EDX, FTIR, XPS, TGA and saturated magnetization techniques. Maximum Pb(II) adsorption capacity was found to be 114.94 mg g −1 with SiO 2 /EDTA molar ratio of 2.5:1. The adsorption rate was significantly fast and the equilibrium was reached within 10 min. The optimum pH was recorded to be 5.0. The maximum adsorption capacity of the studied heavy metal ions calculated by Langmuir model followed the order: Cu(II) (0.58 mmol g −1 ) > Pb(II) (0.55 mmol g −1 ) ≈ Ni(II) (0.55 mmol g −1 ) > Cd(II) (0.45 mmol g −1 ). Moreover, Pb(II) and Cu(II) adsorption capacities were not significantly affected by co-existing cations and NOM. These results suggested that this adsorbent can be considered as a promising adsorbent to remove Pb(II) and Cu(II) from wastewaters.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL SPECIATION AND BIOAVAILABILITY
·
2018
·
IF 1.362
Bingyi Xie,Yanji Jiang,Zhe Zhang,Gang Cao,Huimin Sun,Nong Wang,Shengsen Wang
The transport of Pb(II) or Cd(II) in subsurface has been studied in the literature; however; their co-transport in porous media in presence of colloids has not been clearly understood. In this work, a series of column experiments were conducted to study Pb(II) and Cd(II) co-transport in saturated porous media under various experimental conditions with different combination of colloidal solution (montmorillonite colloid, manual loessial soil colloid and humic acid), flow rate (0.1, 0.5 and 1.0 ml min−1) and sand grain size (0.4–0.8mm and 0.8–2.0mm). The results showed that increase of flow rate and grain size promoted the mobility of Pb(II) and Cd(II), furthermore, the presences of mobile colloids also enhanced the mobility of the two heavy metals, meanwhile, Cd(II) showed higher mobility than Pb(II) in the columns. Findings from this work enhanced current understanding of the competitive transport and colloid-facilitated transport of heavy metals in saturated porous media.
研究领域:
环境科学
·
土壤学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2013
·Vol. 20
·期 2
·849-860
·
IF 3.476
Duan Chunting,Zhao Ning,Yu Xiaolan,Zhang Xiaoyan,Xu Jian
Kapok fiber, a natural hollow fiber with thin shell and large cavity, has rarely been used as adsorbent for heavy metal ions. In this paper, kapok fibers were modified with diethylenetriamine pentaacetic acid (DTPA) after hydrophilicity treatment. The adsorption behavior of the resultant kapok-DTPA influenced by pH, adsorption time and initial concentration of metal ion was investigated. The results demonstrate that adsorption equilibrium was reached within 2 min for Pb 2+ and Cd 2+ . Adsorption kinetics showed that the adsorption rate was well fitted by pseudo-second-order rate model. The adsorption isotherms were studied, and the best fit was obtained in the Langmuir model. The maximum adsorption capacities of kapok-DTPA were 310.6 mg g −1 for Pb 2+ , 163.7 mg g −1 for Cd 2+ , 101.0 mg g −1 for Cu 2+ , respectively. After eight desorption and re-adsorption loops, the lost adsorption capacities for Pb 2+ and Cu 2+ were less than 10 %. Because of the large specific area derived from the hollow fiber structure, kapok-DTPA exhibited much better adsorption capacity compared with many other reported adsorbents based on natural materials.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Xiaoqian Li,Yan Yu,Na Zheng,Sujing Wang,Siyu Sun,Qirui An,Pengyang Li,Yunyang Li,Shengnan Hou,Xue Song
Street dust is an important contributor to heavy metal exposure in street sweepers. In this work, the levels of cadmium (Cd), lead (Pb), and arsenic (As) in street dust were evaluated, and the corresponding health implications for street sweepers in the smelting district of Huludao city northeast China were assessed. The contributions of dietary sources and dust to total metal exposure in street sweepers were compared. Because street sweepers are exposed to street dust both during work and nonwork hours, the health risks faced by street sweepers are uncertain. Therefore, variable exposure duration was considered using a deterministic model. A probabilistic risk assessment model was developed to explore the health effects of street dust on street sweepers via Monte Carlo simulation. The various exposure parameters that affect risk were analyzed using sensitivity analysis. The average Cd, Pb, and As levels in the hair of street sweepers were 2.04, 20.12, and 0.52 mg·kg -1 , respectively. These values were higher than those for residents (i.e., not street sweepers) of Huludao. Strong correlations were found between the logarithms (base 10) of the Cd, Pb, and As contents in dust and hair ( r Cd = 0.581, p < 0.01; r Pb = 0.428, p < 0.01; r As = 0.378, p < 0.01; n = 62). Based on analysis using deterministic models, the maximum exposures to Cd and Pb via dust through the alimentary canal were nearly three and six times higher than the dietary exposures, respectively. Sensitivity analysis indicated that exposure duration is an important parameter.
研究领域:
环境科学
·
公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Baofei Sun,Wei Chen,Yanyi Huang,Daofu Wu,Heng Luo,Faguang Kuang,Hongmei Ran,Yichen Liu,Liqin Gao,Jinchen Zhou,Bo Gao,Qiang Huang,Xiaosheng Tang
Metal halide perovskites (MHP) are potential candidates for the photocatalytic reduction of CO 2 due to their long photogenerated carrier lifetime and charge diffusion length. However, the conventional long-chain ligand impedes the adsorption and activation of CO 2 molecules in practical applications. Here, a ligand modulation technology is employed to enhance the photocatalytic CO 2 reduction activity of lead-free Cs 2 AgInCl 6 microcrystals (MCs). The Cs 2 AgInCl 6 MCs passivated by Oleic acid (OLA) and Octanoic acid (OCA) are used for photocatalytic CO 2 reduction. The results show that the surface defects and electronic properties of Cs 2 AgInCl 6 MCs can be adjusted through ligand modulation. Compared with the OLA-Cs 2 AgInCl 6 , the OCA-Cs 2 AgInCl 6 catalyst demonstrated a significant improvement in the catalytic yield of CO and CH 4 . The CO and CH 4 catalytic yields of OCA-Cs 2 AgInCl 6 reached 171.88 and 34.15 µmol g −1 h −1 which were 2.03 and 12.98 times higher than those of OLA- Cs 2 AgInCl 6 , and the total electron consumption rate of OCA-Cs 2 AgInCl 6 was 615.2 µmol g −1 h −1 which was 3.25 times higher than that of OLA-Cs 2 AgInCl 6 . Furthermore, in situ diffuse reflectance infrared Fourier transform spectra revealed the enhancement of photocatalytic activity in Cs 2 AgInCl 6 MCs induced by ligand modulation. This study illustrates the potential of lead-free Cs 2 AgInCl 6 MCs for efficient photocatalytic CO 2 reduction and provides a ligand modulation strategy for the active promotion of MHP photocatalysts.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Pengran Gao,Yi Liu,Weixin Lv,Rui Zhang,Wei Liu,Xianfu Bu,Guanghua Li,Lixu Lei
Three artificial mixtures of PbSO 4 and PbO 2 as well as the active materials obtained directly from the positive plates of spent batteries have been solvothermally treated in methanol at 140 °C for 24 h, which produce mainly PbO·PbSO 4 . The PbO·PbSO 4 can be easily desulphated with ammonium carbonate to produce PbCO 3 , which can be calcined to form α-PbO to be used as positive active material of lead acid batteries . The α-PbO powders are irregular particles and highly electrochemically active, which discharges around 165 mAh g −1 at 5 mA g −1 , 80 mAh g −1 at 200 mA g −1 and 60 mAh g −1 at 400 mA g −1 with excellent cyclic stability in 50 cycles. SEM investigations show that the as-formed PbO·PbSO 4 may inherit and enhance the morphological characteristics of PbSO 4 , and carbonation of PbO·PbSO 4 does not destroy the rod-like characteristics. For the active material from the positive plates of spent lead acid batteries, the discharge capacities are 170 mAh g −1 at the current density of 5 mA g −1 , and 60 mAh g −1 at 400 mA g −1 , which is also similar. In 50 cycles, its capacity loss is only 5%.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Food Analytical Methods
·
2016
·Vol. 9
·期 12
·3501-3508
·
IF 2.167
Shao Yufang,Chen Ying,Liu Jian,Wu Pingping,Ying Yibin,Xie Jing
High-resolution inductively coupled plasma mass spectrometry (ICP-MS) was applied to determine potential toxic element pollution in rice and paddy soil in a lead-acid battery production area. The contamination levels of chromium (Cr), cadmium (Cd), and lead (Pb) in rice and soil at three sampling areas were determined, and the uptake mechanism of Cr, Cd, and Pb from soil to rice grain was preliminarily analyzed. The results show that the range of potential toxic elements in rice concentrations is 3.914–11.788, 0.057–1.215, and 0.187–1.585 mg kg −1 for Cr, Cd, and Pb, respectively. For the paddy soils, Cd concentration is 0.610 mg kg −1 , which exceeds 0.300 mg kg −1 , a value recommended by Chinese Environmental Quality. Bioaccumulation factor (BAF, an index of the ability of plant to absorb a particular metal with respect to its concentration in the soil substrate) values of Cr, Cd, and Pb were less than 1 in all rice samples, suggesting that the bioavailability of these metals was relatively low in rice. The correlations between BAF values with organic matter (OM) and pH were calculated to find the mobility and availability of potential toxic elements in soil. At last, the estimated daily intake (EDI) dose was determined to evaluate the health risk to local population via consumption of rice contaminated with Cr, Cd, and Pb. This study indicated that the accumulation and translocation of potential toxic elements from soil to rice could cause the health risk for the local population.
研究领域:
环境科学
·
农业化学
·
毒理学
·
公共卫生
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）