JOURNAL OF SEPARATION SCIENCE
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2012
·Vol. 35
·期 18
·2499-2505
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IF 2.733
Jin-Peng Yuan,Ru-Song Zhao,Chuan-Ge Cheng,Xiao-Li Wang,Zhao-Jie Cui
An expeditious and sensitive method for the analysis of eight major polybrominated diphenyl ethers (PBDEs) in soil is presented in this study. The method is based on matrix solid-phase dispersion (MSPD) extraction and gas chromatography with negative chemical ionization mass spectrometry. Bamboo charcoal, a cheap and potentially useful material, was selected for the first time as the MSPD dispersive sorbent. Parameters affecting the extraction efficiency, including the ratio of sorbent to sample, and the type and amount of eluent, were investigated and optimized in detail. Under optimal conditions, the spiked recovery of the PBDEs was in the range 71.7–105.9%, and the limits of detection varied from 10 to 400 pg g −1 (dry weight). Excellent linearity with correlation coefficients ( r 2 ) of 0.9992–0.9999 was obtained over the concentration range of 0.10–500 ng g −1 , except for BDE-209, for which the effective concentration range was 1.0–5000 ng g −1 . The developed method has been successfully applied to the analysis of PBDEs in real soil samples.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
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2021
·
IF 8.071
Han Zhang,Ronghua Li,Zengqiang Zhang
At present, the simultaneous removal of organic dyes and heavy metals in complex wastewater has raised considerable concern, owing to their striking differences in physicochemical properties . Adsorption, as one of the few removal methods, has attracted extensive attention and gained popularity. Herein, a versatile EDTA and chitosan bi-functionalized magnetic bamboo biochar adsorbent (ECMBB) was synthesized for coinstantaneous adsorption of methyl orange (MO) and heavy metals (Cd(II) and Zn(II)). In this case, the as-synthesized ECMBB composites inherited favorable anionic MO removal performance from bamboo biochar (BB) obtained at 700 °C through electrostatic attraction, hydrogen bonding and π-π interaction, also enhanced the binding of cationic metals by introducing amino groups of chitosan and carboxyl groups of EDTA. In the unitary system, the removal of MO, Cd(II) and Zn(II) by three as-prepared adsorbents can be well illuminated by pseudo-second-order kinetic model and Langmuir isotherm theory. The saturated capture amounts of ECMBB at 25 °C are 305.4 mg g −1 for MO, 63.2 mg g −1 for Cd(II) and 50.8 mg g −1 for Zn(II), which, under the same conditions, are 1.3, 2.6 and 2.5 times those of chitosan-modified magnetic bamboo biochar (CMBB) and 1.9, 6.1 and 5.4 times those of magnetic bamboo biochar (MBB), respectively. Remarkably, in MO-metal binary system, coexisting MO visibly enhanced the adsorption of Cd(II) and Zn(II), while coexisting heavy metals had no significant impact on MO adsorption. Furthermore, ECMBB exhibited no significant loss in adsorption efficiency even after eight adsorption-desorption experiments. This study lays the foundation for fabricating desired integrative biochar adsorbents in the simultaneous purification of organic and metallic pollutants from complex wastewater.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2012
·
IF 3.07
Peng Liao,Songhu Yuan,Wenjing Xie,Wenbiao Zhang,Man Tong,Kun Wang
The adsorption kinetics and thermodynamics of nitrogen-heterocyclic compounds (NHCs), pyridine, indole and quinoline, in aqueous solutions on bamboo charcoal (BC), as well as the regeneration of spent BC by microwave radiation, are investigated. BC is produced by incomplete combustion of moso bamboo at high temperature and nitrogen atmosphere. Adsorption kinetics is analyzed using pseudo-first-order and pseudo-second-order as well as Weber–Morris model. The results show that NHC adsorption on BC is predominantly regulated by surface diffusion in initial 1 h followed by intraparticle diffusion in later stage. BC exhibits a strong adsorption affinity to NHCs, and the adsorption isotherms are well described by Freundlich model. Thermodynamic analysis indicates that the adsorption is spontaneous and endothermic. Adsorption site energy analysis illustrates a distribution of adsorption energy, which indicates the heterogeneous sites on BC for NHC adsorption. Furthermore, spent BC with NHC adsorption can be effectively regenerated by MW radiation. The adsorption capacity becomes even higher than that of virgin BC after five times of adsorption–regeneration cycles. This study proves BC is a promising adsorbent for NHC removal in wastewater.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 3
·763
·
IF 3.748
Weijun Ying,Shuo Tian,Huan Liu,Zenan Zhou,Grantson Kapeso,Jinhuan Zhong,Wenbiao Zhang
In this work, nitrogen-doped bamboo-based activated carbon (NBAC) was in situ synthesized from simply blending bamboo charcoal (BC) with sodamide (SA, NaNH2) powders and heating with a protection of nitrogen flow at a medium temperature. The elemental analysis and X-ray photoelectron spectra of as-synthesized NBAC showed quite a high nitrogen level of the simultaneously activated and doped samples; an abundant pore structure had also been determined from the NBACs which has a narrow size distribution of micropores (<2 nm) and favorable specific surface area that presented superb adsorption performance. The fcarbon dioxide (CO2) adsorption of the NBACs was measured at 0 °C and 25 °C at a pressure of 1 bar, whose capture capacities reached 3.68–4.95 mmol/g and 2.49–3.52 mmol/g, respectively, and the maximum adsorption could be observed for NBACs fabricated with an SA/BC ratio of 3:1 and activated at 500 °C. Further, adsorption selectivity of CO2over N2was deduced with the ideal adsorbed solution theory ((IAST), the selectivity was finally calculated which ranged from 15 to 17 for the NBACs fabricated at 500 °C). The initial isosteric heat of adsorption (Qst) of NBACs was also determined at 30–40 kJ/mol, which suggested that CO2adsorption was a physical process. The results of ten-cycle adsorption-desorption experimentally confirmed the regenerated NBACs of a steady CO2adsorption performance, that is, the as-synthesized versatile NBAC with superb reproducibility makes it a perspective candidate in CO2capture and separation application.Keywords:bamboo charcoal;bamboo-based activated carbon;N-doping activation;CO2adsorption;capture capacity
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
CHEMOSPHERE
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2019
·
IF 5.108
Liping Lou,Qian Huang,Yiling Lou,Jingrang Lu,Baolan Hu,Qi Lin
To investigate the role of adsorption by biochar and biodegradation by bacteria in the wastewater treatment system of microorganisms immobilized on biochar, Nonylphenol (NP) removal (adsorption + degradation) rates and degradation rates from water by NP degrading bacteria immobilized on bamboo charcoal (BC) and wood charcoal (WC) were examined in a short-term and long-term. Results showed that cells immobilized on different biochar had different NP removal effects, and cells immobilized on bamboo charcoal (I-BC) was better. After eight rounds of long-term reuse, the cumulative removal rate and the degradation rate of NP in water by I-BC were 93.95% and 41.86%, respectively, significantly higher than those of cells immobilized on wood charcoal (69.60%, 22.78%) and free cells (64.79%, 19.49%) (P < 0.01). The rise in the ratio of the degradation rate to the removal rate indicated that the long-term NP removal effect is more dependent on biodegradation. The amount of residual NP in I-BC still accounted for about 50%, indicating that the secondary pollution in the disposal of carrier could not be ignored. In addition, promotion effect of biochar on microorganisms were observed by SEM , quantitative PCR and 16S rRNA. Pseudomonas , Achromobacter , Ochrobactrum and Stenotrophomonas were predominant bacteria for NP degradation. The addition of biochar (especially bamboo charcoal) also effectively delayed the transformation of their community structure.
研究领域:
环境工程
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微生物学
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水处理
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PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
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2018
·
IF 4.92
Kuichuan Sheng,Shen Zhang,Shaoping Qian,Cesar A. Fontanillo Lopez
We prepared poly(lactic acid) (PLA)/bamboo cellulose nanowhiskers (BCNW) bionanocomposite with a high toughness but a low modulus in the previous work. In this paper, a new reinforcement, silane surface-modified ultrafine bamboo-char (UFBC), was employed to strengthen the binary PLA/BCNW bionanocomposite. The ternary bionanocomposite films were fabricated by a solution casting with different contents of surface-treated UFBC in the range of 0.25 wt% to 4.0 wt%. The functionalization of UFBC with (3-mercaptopropyl)trimethoxysilane (A-189) favored its dispersion in the PLA matrix; sea-island and nuclear-shell characteristics were observed by the scanning electron microscopy (SEM) and transmission electron microscopy (TEM). When the UFBC content was 0.25 wt%, the tensile strength and elongation at break increased by 99.26% and 104.93%, respectively, comparing to the neat PLA. Differential scanning calorimetry (DSC) results showed that glass transition temperature , crystallization temperature , crystallization enthalpy and crystallinity increased with the increase of UFBC contents. Thermogravimetric analysis demonstrated that the thermal degradation stability decreased with the UFBC addition. BCNW and UFBC produced a synergistic effect on composites’ toughening and strengthening. These results provided a basic understanding of PLA enhancement mechanism and a simple approach for PLA composite manufacture with sound mechanical properties .
研究领域:
材料科学
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复合材料工程
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DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
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2016
·Vol. 39
·期 10
·1926-1934
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IF 2.741
Chun-peng Diao,Xiaoting Yu,Cong Li,Xiao Yang,Aling Sun,Renmin Liu
A vortex-assisted magnetic matrix solid-phase dispersion method was proposed for the determination of polychlorinated biphenyls in different matrix water samples by gas chromatography with electron capture detection. Magnetic bamboo charcoal (MBC) was synthesized for the adsorption of polychlorinated biphenyls in water samples. Complete separation of the liquid phase and the solid magnetic bamboo charcoal was easily achieved by using a permanent magnet. Under the optimized conditions, good linearity in the range of 0.006–5.0 μg/L was obtained with regression coefficients ( r ) higher than 0.9986. Based on a signal-to-noise ratio of 3, limits of detection were found to be 0.001–0.003 μg/L. Relative standard deviations ranged from 2.92 to 6.56%. Relative recoveries were 96.6–111.2% for the spiked wastewater sample and 90.7–104.7% for the spiked lake water sample. All results showed that the proposed method was simple, sensitive, and reliable for the determination of polychlorinated biphenyls in water samples.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 29
·期 3
·799-805
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IF 1.637
Zhao Piqi,Liu Honghua,Guo Xiangyang,Wang Han,Wang Shoude,Lu Lingchao,Cheng Xin
The bamboo charcoal/nano-TiO 2 (BC/TiO 2 ) composite material is designed and prepared for further improving photocatalytic property of TiO 2 . Assessment of BC/TiO 2 composite material and its application in photocatalytic coating are investigated by nitrogen absorption test, scanning electron microscopy-energy disperse spectroscopy (SEM-EDS) characterization and photocatalytic and mechanical properties analysis. The results show that optimal ratio of TiO 2 to BC is 0.03. Rhodamine B (RhB) degradation ratio can reach 62.9% under 4 h UV light irradiation, which is 43.7% higher than pure TiO 2 sample. The specific surface area (S BET ) and the total average pore size ( \(\overline {D}\) ) of BC/TiO 2 can reach 388.33 m 2 /g and 3.71 nm, respectively. Moreover, the photocatalytic coatings prepared mainly by BC/TiO 2 and polyacrylic emulsion (PAE), not only show satisfactory mechanical properties, but also have excellent photocatalytic property. When the addition of BC/TiO 2 composite materials is 6%, the photocatalytic property of coating is optimal, RhB degradation ratio can reach 83.7% under 8 h UV light irradiation. Also the adhesion, pencil hardness and impact resistance reach 2 level, 2H and 44 kg cm, respectively.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 5
·679
·
IF 2.467
Lidan Fan,Mengyue Wang,Zhen Zhang,Gang Qin,Xiaoyi Hu,Qiang Chen
Natural bamboo charcoal (BC) powder has been developed as a novel filler in order to further improve performances of the polyvinyl alcohol (PVA)-based alkaline solid polymer electrolyte (ASPE) by solution casting method. X-ray diffraction patterns of composite polymer electrolyte with BC revealed the decrease in the degree of crystallinity with increasing content of BC. Scanning electron microscopy images showed pores on a micrometer scale (average diameter about 2 μm) distributed inside and on the surface of the membranes, indicating a three-dimension network formed in the polymer framework. The ionic conductivity was measured by the alternating-current (AC) impedance method, and the highest conductivity value of 6.63 × 10−2S·cm−1was obtained with 16 wt % of BC content andmKOH:mPVA= 2:1.5 at 30 °C. The contents of BC and KOH could significantly influence the conductivity. The temperature dependence of the bulk electrical conductivity displayed a combination of Arrhenius nature, and the activation energy for the ion in polymer electrolyte has been calculated. The electrochemical stability window of the electrolyte membrane was over 1.6 V. The thermogravimetric analysis curves showed that the degradation temperatures of PVA-BC-KOH ASPE membranes shifted toward higher with adding BC. A simple nickel-hydrogen battery containing PVA-BC-KOH electrolyte membrane was assembled with a maximum discharge capacity of 193 mAh·g−1.Keywords:alkaline solid polymer electrolyte;polyvinyl alcohol;bamboo charcoal;ionic conductivity;nickel-hydrogen battery
研究领域:
材料科学
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电化学
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PubMed
高影响因子
Nanoscale Research Letters
·
2019
·Vol. 14
·期 1
·1-11
·
IF 3.159
Guo Chaozhong,Li Yanrong,Xu Ya,Xiang Qin,Sun Lingtao,Zhang Weizhong,Li Wensheng,Si Yujun,Luo Zhongli
Synthesis of metal-free carbon-based electrocatalysts for oxygen reduction reaction (ORR) to replace the conventional platinum-based catalysts has currently become a hot topic of research. This work proposes an activation-assisted carbonization strategy for the fabrication of nitrogen-doped nanoporous carbon microfibers (Me-CFZ-900) with a high BET surface area (~ 929.4 m 2 g −1 ) via using melamine as a promoter/nitrogen source and bamboo-carbon biowastes as the carbon source with the help of a zinc chloride activator. Electrochemical tests showed that the Me-CFZ-900 material has exhibited excellent ORR electrocatalytic activity and long-term stability, and also displayed a quasi-four-electron ORR pathway in alkaline electrolyte. We also find that the graphitic-N may be the catalytically active site for the ORR, but the formation of planar-N can further help to promote the ORR activity for our catalysts. The results open a new space and provide a new idea to prepare valuable porous nanocarbon materials on the basis of carbonaceous solid wastes for catalysis of a wide range of electrochemical reactions in the future.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Yadi Su,Jingyi Tang,Yu Chen,Ahmad Ali,Sara Toufouki,Xiaodong Wang,Jing Zhang,Shun Yao
From the common economic crop, bamboo resources have gradually shown more and more medical and medicinal values, which need comprehensive utilization. Herein, a unique composite film loaded with bamboo chlorophyll or bamboo charcoal as functional additives was prepared by a one-pot method for the first time, which was based on bamboo cellulose as basic material, gelatin as film-forming agent, and the deep eutectic solvent (DES) as solvent, dispersant, crosslinker, as well as penetration-promoting agent simultaneously. The developed homogeneous film showed improved mechanical strength, uniformity, adhesion and potential antiulcer performance. In addition, it has certain air permeability, moisture retention and anti-ultraviolet properties. Moreover, the transdermal process of chlorophyll was fitted by the popular in vitro release models, and it was concluded that the in vitro release process of the film followed a dual mechanism of erosion and diffusion. Finally, the actual effect was tested in by in vivo validation, and the whole results aimed to realize the multi-functionalization of such a new bio-material film and systematic exploitation of bamboo resources simultaneously.
研究领域:
材料科学
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生物医学工程
·
植物资源利用
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DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2024
·
IF 5.5
Yuhang Qian,Xinye Liu,Xiangjun Zheng,Zilong Yang,Yanjie Yu,Fei Gao,Xingmei Guo,Yuanjun Liu,Xuecheng Cao,Ruihua Guo,Junhao Zhang
Comprehensive Summary Facile mass transport channel and accessible active sites are crucial for binder-free air electrode catalysts in rechargeable flexible zinc-air battery (ZAB). Herein, a ZnS/NH 3 dual-assisted pyrolysis strategy is proposed to prepare N/S-doped hierarchical porous bamboo carbon cloth (HP-NS-BCC) as binder-free air electrode catalyst for ZAB. BCC fabric with abundant micropores is firstly used as flexible carbon support to facilitate the heteroatom-doping and construct the hierarchical porous structure. ZnS nanospheres and NH 3 activization together facilitate the electronic modulation of carbon matrix by N/S-doping and optimize the macro/meso/micropores structure of carbon fibers. Benefiting from the highly-exposed N/S-induced sites with enhanced intrinsic activity, the optimized mass transport of biocarbon fibers, as well as the ultra-large specific surface area of 2436.1 m 2 ·g –1 , the resultant HP-NS-BCC catalyst exhibits improved kinetics for oxygen reduction/evolution reaction. When applied to rechargeable aqueous ZABs, it achieves a significant peak power density of 249.1 mW·cm −2 . As binder-free air electrode catalyst, the flexible ZAB also displays stable cycling over 500 cycles with a minimal voltage gap of 0.42 V, showcasing promising applications in flexible electronic devices.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）