SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Penghui Guo,Xiang Gu,Zhaoshuang Li,Xu Xu,Yini Cao,Guoen Yang,Chuntao Kuang,Xingong Li,Yan Qing,Yiqiang Wu
The discharge of heavy metals (HMS) from industrial production has severely damaged the natural environment and human health. To address the challenges posed by heavy metals, a novel almond shell biochar (FeS-CTS@nBC) modified with FeS and chitosan (CTS) was prepared. Scanning electron microscopy and X-ray photoelectron spectroscopy observations revealed a uniform distribution of FeS particles on the biochar. Adsorption thermodynamics experiments showed that the maximum adsorbed amounts of cadmium (Cd), lead (Pb), and chromium (Cr (VI) and Cr (III)) in FeS-CTS@nBC were 85.6, 89.63, 94.2, and 75.62 mg/g, respectively. Results of soil incubation experiments indicated that FeS-CTS@nBC had a desirable immobilization effect on heavy metals, decreasing the bioavailability of Cd, Pb, Cr (VI), and Cr (III) by 29.43 %, 23.93 %, 5.75 % and 5.23 %, respectively. Density functional theory (DFT) calculations, revealed that the oxygen-containing functional groups on the biochar exhibited stronger adsorption capacities for heavy metals. Plant potting experiments indicated that the paddy grew well in the soil remediated with FeS-CTS@nBC. The Cd content in the roots and leaves of the paddy after nBCS2 repair was reduced by 28.01 % and 55.73 %, respectively. Overall, this work provides a promising low-cost method with a simple production process for mitigation of heavy metals from water and soil.
研究领域:
环境科学
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材料科学
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植物学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Qichun Xi,Qiang Yu,Shuting Li,Zhen Chen,Wei Zhu,Huixi Li,Haoran Wu,Zhengming Dai,Meng Wang,Lian Ren,Linxia Li
The negative plate additive can significantly enhance the performance of lead-carbon batteries (LCBs). In this study, manganese oxide/reaming apricot shell carbon composite (Mn-RASC) as a negative additive was prepared by employing a simple KOH activation of apricot shells and a hydrothermal strategy to enhance the electrochemical properties of the LCBs. The additive is constructed to alleviate the irreversible sulfation of the negative plate in the high-rate partial state of charge (HRPSoC). And the results illustrate that the initial discharge capacity of the Mn-RASC-modified lead-carbon battery is 153.01 mAh/g, surpassing the 83.37 mAh/g of the blank control group battery. Additionally, the cycle life of the Mn-RASC-modified lead-carbon battery reaches 15,188 cycles, 8.7 times longer than that of the blank control group battery (1744 cycles). Manganese oxide doping onto the electrode surface can achieve more charge transfer under a redox reaction, which is conducive to lowering the internal resistance and improving the conversion rate of the negative active material, thus effectively inhibiting the irreversible sulfation of the negative plate. In addition, the application of Mn-RASC also considers the inhibition of hydrogen evolution, thus comprehensively improving the cycle life of the battery. The successful preparation of Mn-RASC also provides a feasible solution for the design and synthesis of negative additives for LCBs.
研究领域:
材料科学
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能源存储
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环境科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 45
·e54646
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IF 3
Athar Ali Khan Gorar,Guo Zhiyi,Wang Zhicheng,Abbas Daham,Zhong-cheng Pan,Jun Wang,Wen-Bin Liu,Mehdi Derradji
By adhering to green chemistry principles, unique and enhanced benzoxazine composite is made from renewable vanillin and furfuryl amine. The bio-benzoxazine poly(V-BZF) structure was confirmed by 1 H NMR and Fourier-transform infrared spectroscopy spectroscopy. Enhanced composites were developed successfully by blending different chemical-treated almond shell particles with poly(V-BZF). Differential scanning calorimetry results reveal that novel benzoxazine's curing temperature was low and slightly reduced by incorporating chemically treated fillers. The lowest polymerizing temperature was recorded as 215°C for the blend of alkali-treated particles. Thermogravimetric analysis demonstrates that composites exhibited superior thermal characteristics, and chemical treatment positively impacts filler material. The limiting oxygen index value classifies poly(V-BZF) composites as flame-retardant and extinguishing. Approximately a 47.56% increase in tensile strength and a 28.9% increase in modulus were recorded with the incorporation of silane-treated filler. Flexural tests demonstrated that composites with silane-treated particles showed maximum flexural strength of 101.5 MPa and a modulus of 4112.6 MPa. The impact strength of composites increased to 73.3%, expanding benzoxazine's manufacturing applications. In addition, the specimen was designed to have composite properties and stress analysis was performed in two Multiphysics software packages. In all, this work confirms that adopting environmentally-friendly methodologies and surface modification of filler can yield superior composites.
研究领域:
材料科学
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绿色化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
·
IF 3.9
Rui Hao,Haixia Ji,Li Gao,Jiahui Chen,Ying Shi,Junyan Yang,Changchun Yuan
Pollution of water resources has become a global environmental problem, and the massive discharge of high-color printing and dyeing wastewater has caused serious harm to the natural environment. In this work, we have used repeated alkali solubilization and acid precipitation for an agricultural and forestry by-product, bilberry kernel shells, to obtain Mountain apricot shell Melanin (Mas-Mel), which can be used for the adsorption of cationic dyes. By graft copolymerization with a natural sugar-based polymer, κ-carrageenan (κCA), in a mild manner, we have prepared the adsorbent, Mountain apricot shell Melanin /κ-carrageenan (Mas-Mel/κCA) hydrogel beads, which were physically and chemically analyzed using a variety of spectroscopic and microscopic techniques. The optimum conditions for methylene blue (MB) adsorption and malachite green (MG) on Mas-Mel/κCA hydrogel were: contact time 150 min, adsorbent dose 60 mg, pH 6–7. The results of the adsorption tests followed the Pseudo-second order kinetics (R 2 = 0.97 and 0.95), and the maximum adsorption capacity of MB and MG based on the Langmuir isotherm model was 48.63 mg/g and 37.84 mg/g, respectively. In addition, the prepared hydrogel beads still exhibited a high reusability and removal rate (∼50 %) after three consecutive 400-minute cyclic adsorption-resolution cycles. Our results may provide a new strategy for the development of green bio-based adsorbent materials and industrial dye wastewater treatment .
研究领域:
环境科学
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材料科学
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生物技术
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Jiahua Mo,Pengfei Yuan,Sheng Chang,Lingzi Xiao,Guangxue Chen
In this study, by introducing melamine into the layered structure of ginkgo shells, both the internal structure was altered and nitrogen atoms were introduced, thereby achieving a dual effect of nitrogen doping and structural modification. The study demonstrated that the combined use of melamine and ZnCl 2 successfully enhanced the electrochemical performance of the material. The optimized material GKN-1.5 has a relatively low specific surface area (332.23 m 2 g −1 ), but its proportion of mesopores and average pore size (5.77 nm) are both higher than those of GK (954.13 m 2 g −1 , 4.46 nm). Additionally, the nitrogen content of GKN-1.5 is 13.73 %, while that of GK is 3.46 %, indicating that nitrogen atoms have been successfully introduced into the resulting material. When assembled into a lithium-ion battery, GKN-1.5 exhibited a charging capacity of 594.75 mAh g −1 and a discharging capacity of 1030.35 mAh g −1 during the first charge-discharge cycle, with an initial coulombic efficiency of 57.72 %, compared to GK (348.38 mAh g −1 , 929.24 mAh g −1 , 37.47 %). Additionally, in cycling performance tests, GKN-1.5 maintained a reversible capacity of 678.05 mAh g −1 after 200 cycles at a current density of 100 mA g −1 . In contrast, GK exhibited a reversible capacity of 370.83 mAh g −1 at the same current density. This study proposes a method for modifying the natural structure of biomass while introducing heteroatoms.
✓ 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）