INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Yongcun Song,Nan Wang,Li-ye Yang,Yang−guang Wang,Di Yu,Xiao-kun Ouyang
Metal–organic frameworks (MOFs) have received special attention from scientists owing to their excellent adsorption performance. However, the difficulty in separating MOFs from adsorbed metals following use has limited their application. A zeolitic imidazole-based MOF with broad applicability for sorption of Pb(II) is examined. In this work, a novel adsorbent employing ZIF-8/calcium alginate microparticles was prepared using sodium alginate and ZIF-8. This adsorbent was characterized using scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction analysis, and X-ray photoelectron spectroscopy. The performance of the ZIF-8@CA microparticles in adsorbing Pb(II) from a Pb(II) solution was investigated, and the impacts of the initial Pb(II) concentration, reaction time, pH, and reaction temperature on the reaction process were investigated. The results showed that ZIF-8@CA microparticles exhibited a maximum adsorption capacity of 1321.21 mg/g at pH 5 after 120 min, and the adsorption process was found to fit the Langmuir isotherm model (R2 = 0.9856) and the pseudo-second-order kinetic model (R2 = 0.9999). These results showed that the adsorption of Pb(II) was an endothermic process. The regeneration experiment with ZIF-8@CA revealed that the removal efficiency of Pb(II) was greater than 80% even after five cycles.
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
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2023
·
IF 5.2
Ning Gu,Yueyang Xu,Yan Yin,Xuzhao Gao,Yongping Zeng
SO x released from the combustion of sulfur-containing compounds in fuels pollute the environment and have a serious impact on human health. Adsorption desulfurization is an effective and environmentally friendly technique for removing sulfur-containing compounds from fuels. Metal-organic frameworks (MOFs) have high specific surface areas and can be easily modified and functionalized, making them excellent candidates for adsorption desulfurization in fuels. In this work, the precursor MIL-100(Fe)-SA was prepared using the hydrothermal method , and the adsorbent Ni@MIL-100(Fe)-SA was obtained by doping Ni 2+ into the resulting MIL-100(Fe)-SA using the impregnation method. FT-IR, X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption isotherms were used to analyze the samples. The results indicated that Ni 2+ was successfully loaded onto MIL-100(Fe)-SA, and the MOF's structure remained stable. The adsorption performance of benzothiophene and thiophene was evaluated through batch adsorption experiments. The adsorption capacities of Ni@MIL-100(Fe)-SA for thiophene and benzothiophene were 23.68 mg S/g and 49.58 mg S/g, respectively. These observations could be ascribed to the π-complexation interactions between Ni 2+ of the framework and thiophenic compounds. The regeneration experiments demonstrated that the spent 11Ni@MIL-100(Fe)-SA-1.5 reach 86% of the adsorption capacity of fresh adsorbent after four cycles. Additionally, the regenerated adsorbent maintained good crystallinity after recycling.
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
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2023
·
IF 2.2
Biao Long,Yu Ma,Ruixia Niu,Chuan Zhang,Hua Song,Hui Wang
A magnetic demulsifier, denoted M-Gn-PAMAM (n = 1, 2, 3), was synthesized by reacting polyamidoamine (PAMAM) dendrimers with Fe3O4@SiO2. The characteristics of magnetic nano-polymer were investigated via using XRD analysis, FT-IR, TEM, and VSM methods. The as-prepared M-Gn-PAMAM was highly effective at removing oil from wastewater produced from ASP flooding, with a maximum oil removal rate of 94% at 60 °C. Furthermore, the regeneration experiments illustrated that M-Gn-PAMAM could be readily recovered by an external magnetic field and it could be recycled up to 9 times without a significant loss in demulsification efficiency. In conclusion, the magnetic demulsifier synthesized in this study could be a promising nanomaterial for use in emulsified oil-water separation.
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
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
·
IF 2.196
Jifeng Guo,Miaomiao Yu,Xiao Wei,Lihui Huang
In this work, the magnetic Fe3O4 imprinted polymers were prepared with the precipitation polymerization method. The polymers were used to selectively identify dichlorophen in complex environmental system. The scanning electron microscopy and transmission electron microscopy scans of magnetic Fe3O4 molecularly imprinted polymers (MMIPs) were carried out. The adsorption properties of MMIPs were examined by adsorption isotherms, kinetics, and selectivity experiments. The Langmuir adsorption isotherm well fitted the adsorption experimental data, and an increase of temperature enhanced the adsorption capacity. The equilibrium adsorption capacity of MMIPs at 318 K was 50.45 mg g–1. The data of kinetics experiments were well fitted by pseudo-second-order equation. Compared to nonimprinted polymer, the MMIPs had more specific selectivity and higher adsorption performance for chlorophene with similar structure. In addition, the regeneration experiments demonstrated that MMIPs have stable adsorption capacity for target molecules and can be quickly recovered in applied magnetic field. Therefore, our study provided an appropriate imprinted polymer material for the adsorption of dichlorophen in water.
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
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Kai Zhang,Shuhang Ren,Xin Yang,Yucui Hou,Weize Wu,Yuyun Bao
Four thermostable functional deep eutectic solvents (DESs) based on imidazole (Im), 2-methylimidazole, 2-ethylimidazole, and 2-propylimidazole as hydrogen bond acceptor (HBA) and glycerol (Gly) as hydrogen bond donor (HBD) were prepared. All prepared DESs can efficiently capture low-concentration SO 2 . The SO 2 solubility increased with decreasing temperature and increasing SO 2 concentration and the available absorption of 2000 ppm SO 2 in Im-Gly DES was high, up to 0.634 mol of SO 2 /mol of Im (0.161 g of SO 2 /g of DES) with n Im : n Gly = 1:2 at 40 °C. The regeneration experiments showed that the SO 2 absorption capacities in Im-Gly DES did not change after 5 absorption/desorption cycles. Furthermore, the absorption mechanism based on 1 H NMR and FTIR analyses indicated that there was an acid–base interaction between SO 2 and Im.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Li Hou,Chunlei Yang,Xiongfei Rao,Lizhong Hu,Youmei Bao,Yun Gao,Xiaolan Zhu
In this study, a novel Pb(II) ion-imprinted polymer based on magnetic laminar graphene oxide composite materials (MnFe 2 O 4 @SiO 2 /GO-IIP) was synthesized by surface ion-imprinted technique for the selective removal of lead ions from aqueous solutions. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and magnetic measurement system were used to characterize the structure and property of as-prepared adsorbents. The adsorption experiments exhibited the MnFe 2 O 4 @SiO 2 /GO-IIP possessed a good adsorption performance and the maximum adsorption capacity of Pb (II) ions reached 58.82 mg g -1 . The adsorption could be accomplished within 30 min and the adsorbents could be separated quickly by a permanent magnet. The Langmuir adsorption isotherm and pseudo-second-order kinetic models were used to describe the adsorption procedure appropriately and the result proved that the chemisorption was the rate-limiting step. The selectivity coefficient of Pb (II)/Ni(II), Pb (II)/Zn(II), Pb (II)/Cd(II), Pb (II)/Co(II) were 25.37, 19.71, 33.07 and 45.7, respectively. In addition, the regeneration experiments confirmed the high stability and reproducibility of adsorbents. Lastly, X-ray photoelectron spectroscopy (XPS) proved the bonding mechanisms of the material and Pb(II) ions with a coordination N‒Pb bond.
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
高影响因子
Chemical Engineering and Processing-Process Intensification
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2024
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IF 3.8
Ying Ma,Youzhi Liu,Jiayu Li,Chengqian Zhang,Shufei Wang
The demand for lithium-ion batteries in new energy vehicles and energy storage technologies is rapidly increasing, making the efficient extraction of lithium resources from salt lakes, which are rich in lithium reserves, crucial. To address the issues of slow adsorption rate and low adsorption capacity of lithium ion sieves in the adsorption column, In this paper, the high-gravity rotating packed bed (RPB) is utilized for the first time to enhance the adsorption process of Li + on lithium ion sieve composite material(CTS/L-HMO), thereby investigating its adsorption mechanism. Specifically, CTS/L-HMO was prepared by combining manganese-based lithium ion sieves with chitosan, and used as the filler for the RPB to adsorb lithium containing solution. The research showed that chitosan successfully coated the manganese-based lithium ion sieves and the distribution of various elements was uniform. In the RPB, the adsorption capacity of CTS/L-HMO increased first and then decreased with the increase of liquid flow rate and high gravity factor. Compared to a fixed bed, the adsorption capacity and adsorption rate in the RPB increased by 43.30 % and 33.33 %, respectively. After 10 cycles of regeneration experiments, the adsorption capacity of CTS/L-HMO remained as high as 30.19 mg/g, and it exhibited high selective adsorption for Li + .
研究领域:
材料科学
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环境工程
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化学工程
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电池技术
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Lingqin Meng,Lizhong Zhang,Gengyu Liang,Bei Wang,Yang Xu,Han Li,Zishuo Song,Hui Yan,Cuixia Guo,Tian Guan,Yonghong He
The public health concern of antibiotic residues in animal-origin food has been a long-standing issue. In this work, we present a novel method for antibiotic detection, leveraging optical weak value amplification and harnessing an indirect competitive inhibition assay, which significantly boosts the system's sensitivity in identifying small molecule antibiotics. We chose chloramphenicol as a model compound and mixed it with chloramphenicol-bovine serum albumin conjugates to bind to the chloramphenicol antibody competitively. We achieved a broad linear detection range of up to 3.24 ng/mL and a high concentration resolution of 33.20 pg/mL. To further validate the universality of our proposed detection methodology, we successfully applied it to testing gibberellin and tetracycline. Moreover, we conducted regeneration experiments and real-sample correlation studies. This study introduces a novel strategy for the label-free optical sensing of small molecule antibiotics, greatly expanding the range of applications for sensors utilizing optical weak value amplification.
研究领域:
分析化学
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光学
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食品安全
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生物技术
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 32
·33427-33439
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IF 2.914
Wang Zongwu,Wu Qing,Zhang Jing,Zhang Huan,Feng Jinglan,Dong Shuying,Sun Jianhui
The efficient removal of heavy metals from aqueous environment is imperative and challenging. A novel ternary composite constructed of diaminopyridine polymers, graphene oxide, and ferrite magnetic nanoparticles was designed by a facile in situ polymerization strategy for the removal of Pb(II) from aqueous solution. Detailed characterization of morphological, chemical, and magnetic properties was employed systematically to confirm the formation of the composite material. Batch adsorption experiment studies suggested that the composite was an excellent adsorbent for Pb(II) which was easily collected after use via exposure to an external magnetic field for 30 s. The effects of different parameters such as solution pH, adsorbent dosage, contact time, initial Pb(II) concentration, temperature, and co-existing ions were examined. The maximum adsorption capacity at pH = 5 was estimated to be 387.2 mg g −1 at 298 K by the Langmuir isotherm model, accompanied by favorable adsorption recyclability according to the investigation of regeneration experiments. Thermodynamic studies revealed that the Pb(II) adsorption via our ternary composite was endothermic and spontaneous. The corresponding removal performance for effluent containing Pb(II) from the battery industry was successfully examined. The present results indicated that our designed adsorbent is beneficial to the practical Pb(II) removal in wastewater purification.
研究领域:
环境科学
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材料科学
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化学工程
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水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）