CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Bing Zhao,Zhiqiang Qian,Min Guo,Zhijian Wu,Zhong Liu
The improved adsorption capacities by increasing specific surface area methods are merely reached about 50% of H 4 Ti 5 O 12 ’s theoretical adsorption capacity, and the adsorption behavior and mechanism of lithium on special facets of H 4 Ti 5 O 12 remain unclear. In this study, a flower-shaped Li 4 Ti 5 O 12 and an octahedral Li 4 Ti 5 O 12 were prepared with the specific surface areas of 176.23 and 83.02 m 2 /g, and the corresponding adsorption behaviors of the obtained adsorbents exposed with (1 1 0) and (1 1 1) facets were investigated by using experimental and computational methods. The maximum Li + uptake values on H 4 Ti 5 O 12 (1 1 0) and H 4 Ti 5 O 12 (1 1 1) are 26.85 mg/g and 33.56 mg/g at 45 °C in 24 mM LiCl solutions, respectively. The fifth reuse ability of H 4 Ti 5 O 12 (1 1 1) still remains 88.9% of the original’s, which is higher than H 4 Ti 5 O 12 (1 1 0) (76.3%). Although with lower specific surface area, the octahedral H 4 Ti 5 O 12 have higher ions selectivity , greater adsorption capacity, and better reuse ability than flower-shaped H 4 Ti 5 O 12 , which may due to the special (1 1 1) facet exposed. Firstly, H 4 Ti 5 O 12 (1 1 1) owned small hole sizes can inhibit other ions diffusing into H 4 Ti 5 O 12 and improve the ion selectivity. Secondly, the immigration paths by the First-principles calculations revealed that the Li + migrate onto the Li 4 Ti 5 O 12 (1 1 1) is easier to than Li 4 Ti 5 O 12 (1 1 0) through 8a-16c-8a-16c sites. At last, [Li(H 2 O) 4 ] + can form the stable complexes and its adsorption energies on (1 1 1) are higher than on (1 1 0) facets, which may lead to larger adsorption capacity and better reuse ability. This work will help to understand the [Li(H 2 O) 4 ] + adsorption behavior and mechanism on different crystal facets by experiments and computations.
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
Metals
·
2022
·Vol. 12
·期 1
·149
·
IF 2.695
Chunhui Zheng,Chunlin He,Yingjie Yang,Toyohisa Fujita,Guifang Wang,Wenchao Yang
The continuous expansion of the market demand and scale of commercial amidoxime chelating resins has caused large amounts of resin to be discarded around the world. In this study, the waste amidoxime chelating resin was reutilized as an adsorbent for the removal and recovery of Pb(II), Cu(II), Cd(II) and Zn(II) ions from aqueous solutions. The physical morphology and chemical composition of the waste amidoxime chelating resin (WAC-resin) from the factory was characterized by the elemental analyzer, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy. The influence of the initial metal ions concentration, contact time, temperature and the solution pH on the adsorption performance of the metal ions was explored by batch experiments. It was shown that the optimal pH was 4. Kinetic studies revealed that adsorption process corresponded with the pseudo-second-order kinetic model and the adsorption isotherm was consistent with the Langmuir model. At room temperature, the adsorption capacities of WAC-resin for Pb2+, Cu2+, Zn2+and Cd2+reached 114.6, 93.4, 24.4 and 20.7 mg/g, respectively.Keywords:waste amidoxime chelating resin;characterization;reutilization;heavy metals
研究领域:
环境科学
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材料科学
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2025
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IF 9
Qing Zhang,Jiao Meng,Qingwen Tian,Lili Zhang,Jing Shen,Yonghao Ni,Zhiguo Wang
The recyclability of lactic acid/choline chloride deep eutectic solvent (DES) in lignocellulose fractionation remains challenging. This study demonstrates that DES reuse reduces delignification efficiency, with a residual lignin content of 9.64% after three cycles, resulting in incomplete fiber separation. The molecular weight of dissolved lignin increased, and 2D HSQC NMR revealed reduced β-O-4 cleavage. Accumulated dissolved hemicellulose and its degradation products (e.g., acetic acid, furfural) altered DES properties, increasing viscosity and reducing hydrogen bond basicity, which hindered mass transfer, lignin-carbohydrate complex dissociation, and lignin depolymerization. To address these limitations, activated carbon adsorption (boosting delignification degree to 77%, near fresh DES at 80%) and prehydrolysis (achieving 82% after three cycles vs. 90% for fresh DES) are proposed to remove hemicellulose and its byproducts, minimizing their impact on recycled DES. This study demonstrates the recyclability of DES and proposes two strategies that significantly improve it, ensuring sustainable and efficient biomass fractionation.
研究领域:
生物质工程
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化学工程
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可再生资源
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Haiping Wang,Xueren Qian,Xianhui An,Ziyang Chang
Counterfeiting has caused great concern all over the world. What's more, the fluorescent materials play an important role in technological research and development for high-security. In this work, lead-metal-organic framework (Pb-MOF) and perovskite (MAPbBr 3 ) were used in papers to achieving fluorescence counterfeiting. Pb-MOF, as the template or precursor of MAPbBr 3 , were in-situ generated on the surface of cellulose fibers (CFs) to preparing into hand sheets (Pb-MOF@CFs). Through the analysis of experimental results, it was found that ligands, reaction systems, addition sequences of drugs, time, etc. would affect the deposition of Pb-MOF on the surface of CFs. Using CH 3 NH 3 Br (MABr) as the anti-counterfeiting ink to write on Pb-MOF@CFs, the orange writing leaped across the paper, which caused by Pb in Pb-MOF chemically reacting with MABr forming MAPbBr 3 . The orange writing displayed green fluorescence under 365 nm ultraviolet lamp excitation. The orange writing with green fluorescence could be extinguished and reconstructed, which had promise for reuse. In addition, fluorescent security papers (MAPbBr 3 @Pb-MOFs@CFs) were prepared by immersing Pb-MOF@CFs in MABr solution. The fluorescence of MAPbBr 3 @Pb-MOFs@CFs opened when the surface of it was scraped under 365 nm ultraviolet lamp. This unique fluorescence property was very important in improving the security of products. Consequently, the ongoing research on perovskite and MOFs materials is of great significance.
研究领域:
材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Zhengyan Chen,Runzhuo Xue,Hongtao Chen,Xueyan Zhao,Zhengzheng Guo,Yanling Jin,Fang Ren,Penggang Ren
The low-cost and high-efficiency porous activated carbon materials as adsorbents have attracted extensive attention to solving the increasing problems of water pollution. Aquatic plant Salvinia adnata (SA) derived porous carbon is a promising candidate as an adsorbent due to its wide distribution and low cost, and well-developed porous structure with abundant pores after activation. In this paper, a series of porous Salvinia adnata activated carbons (SAACs) were successfully synthesized via a facile two-step method with carbonization and KOH activation varying different activated temperatures and KOH addition ratios. The morphology and structure of the SAACs were characterized using various analytical and spectroscopic techniques. The prepared SAAC-1000–3 (activated temperature is 1000 °C, mass ratio of SA and KOH is 1:3) exhibits a well-developed hierarchical porous structure with a large specific surface area of 2583 m 2 g −1 and pore volume of 2.17 cm 3 g −1 , which facilitates the diffusion and adsorption of dye molecular into SAAC. The batch adsorption experiments were applied to systematically evaluate the adsorption properties for organic dyes with different contact time, initial concentration, temperature, pH, and co-existing ion concentration. The adsorption performance results show that SAAC-1000–3 demonstrates a fast adsorption process for the complete adsorption of methylene blue (MB) and methyl orange (MO) within 3 min, moreover, it also displays a remarkable maximum adsorption capacity of 643.63 mg g −1 at higher MB concentration of 500 mg L −1 . Furthermore, an ultrahigh removal efficiency of 99.9% for MB after nine adsorption-desorption cycles indicates the good reusability of SAAC. The Salvinia adnata activated carbon can be as an alternative adsorbent for the fast and high-efficiency treatment of dye-containing wastewater. This work also provides a new idea for waste utilization of water plants.
研究领域:
环境科学
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材料科学
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植物学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Yunchang Fan,Hui Luo,Chunyan Zhu,Wenjin Li,Di Wu,Hongwei Wu
This work synthesized a series of hydrophobic natural alcohols based deep eutectic solvents (NADESs). These NADESs exhibited high extraction ability for quinine. The NADESs with lower viscosity and stronger hydrogen bond accepting ability ( β ) had stronger extraction ability. Quinine acted as hydrogen bond acceptor (HBA) for the hydrogen bonding between quinine and NADESs. The extraction efficiency of NADESs for quinine was higher than ionic liquid (IL), trichloromethane and ethyl acetate. After extraction, the NADES phase could be reused and quinine could be recovered from NADES phase via back extraction with 1.0% acetic acid aqueous solution as extraction solvent. The NADESs have the advantages of ease of preparation and high atom-economy and may be promising solvents for the extraction of bioactive compounds from natural sources compared with ionic liquids and conventional organic solvents.
研究领域:
化学
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药学
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DOI
高影响因子
Water
·
2023
·Vol. 16
·期 1
·167
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IF 3.4
Tiantian Chen,Jiayu Sun,Ruixue Jiang,Tongfei Zhang,Yulei Zhang,Xiaochen Li
Purified red phosphorus (RP) can be used as an adsorbent. However, the adsorption mechanism and reuse ability of purified RP have not been reported. This study utilized X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy techniques (a statistical physics model and the standard molar free energy of formation) to investigate the adsorption mechanism of methylene blue (MB) by purified RP. Purification did not change commercial RP structure according to X-ray diffraction. The results showed that the adsorption process only included physical adsorption according to Fourier transform infrared spectroscopy and UV–vis diffuse reflection absorption spectra. The specific areas of commercial RP and purified RP were 0.02 cm3/g and 5.27 cm3/g, respectively. Thus, purified RP has a higher adsorption capacity compared with commercial RP. A statistical physics model showed that, as the temperature increased from 288 to 308 K, theqe,Dmandqsatof purified RP for MB increased from 179.87, 0.824 and 0.824 to 303.26 mg/g, 1.497 mol/kg and 1.497 mol/kg, respectively. The fitted values of ΔrSmθ, ΔrHmθand ΔrGmθwere 104.38 J·mol−1·K−1, −2.7 × 103J·mol−1and negative, respectively. Thus, according to adsorption energy, the adsorption of MB by purified RP was a spontaneous process, which was mainly driven by entropy increasing. Compared with neutral dye, the purified RP had higher adsorption ability for the cationic dye and anionic dye. As the purified RP dose increased from 30 to 150 mg, the adsorption capacity of purified RP increased. However, as the MB concentration and pH increased, the adsorption capacity of purified RP decreased. The purified RP had excellent reuse ability and high temperature desorption can be applied to obtain its reuse ability.
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 & TECHNOLOGY
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2022
·Vol. 46
·期 4
·803-812
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IF 2.215
Qin Li,Lijin Peng,Jing Shi,Jianbo Chu,Xinyue Zhang,Qiyuan Shi
An efficient and sustainable expanded-bed adsorption (EBA) method was developed for the valorization of lotus leaf which is an agricultural by-product. The in-situ procedure was used to reduce the energy consumption of EBA. Comparing this in-situ process to the conventional one, some additional advantages were observed, namely, significant enhancement of nuciferine recovery, considerable reduction of processing time, etc. Furthermore, a multistage procedure was investigated to reduce running cost and minimize environmental pollution by reusing solvents and adsorbents. Reusing of D101 macroporous resin, HCl and NaOH solution had almost no influence on the yield of nuciferine.
研究领域:
农业工程
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化学工程
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药学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Lijun You,Ke Xu,Guanjun Ding,Xinming Shi,Jumei Li,Shaoyun Wang,Jiabin Wang
Magnetic covalent organic framework modified by Fe 3 O 4 nanoparticles (Fe 3 O 4 @COF) were facile synthesized and used as adsorbent for the adsorption of bisphenols from aqueous solutions. The Fe 3 O 4 @COF is synthesized by catalyst-free Schiff base reaction of melamine and terephthalaldehyde, and synthesis strategy is flexible and controllable. The as prepared Fe 3 O 4 @COF was characterized by TEM , PXRD , TGA and BET analysis. The Fe 3 O 4 @COF possessed large specific surface area (335.2 m 2 /g), high chemical and thermal stability, and high saturation magnetization (49.6 emu/g), which in favor of rapid magnetic separation and efficient adsorption in the adsorption process. The effects of temperature, adsorbent dosage, pH and salt concentration on the adsorption of bisphenols (BPA and BPAF) were studied. The as-prepared adsorbent showed an excellent adsorption ability for BPA and BPAF , and the max adsorption capacity of BPA and BPAF could reach 140 and 290.4 mg/g. The adsorption kinetic fitted the pseudo-second-order kinetic model and the adsorption isotherm followed the Freundlich isotherm equation. Moreover, the Fe 3 O 4 @COF presented favorable re-use performance, which kept over 81.4% removal efficiency of bisphenols after five consecutive recycles. The high adsorption performance and reusability make the Fe 3 O 4 @COF a promising adsorbent for the removal of bisphenols.
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
高影响因子
JOURNAL OF AOAC INTERNATIONAL
·
2020
·Vol. 104
·期 2
·479-484
·
IF 1.51
Lan Tao,Yu Congcong,Li Ren,Ma Zheng,Xi Xingjun,Chu Qiao
BackgroundSolanesol is an important pharmaceutical intermediate raw material, mainly used to synthesize coenzyme Q10, vitamin K2. It can be found prominent in potato stems and leaves. But now potato stems and leaves are always abandoned or discarded as they are not suitable for use as feed in aquaculture or other purposes. These agricultural waste resources can be reutilized as the corresponding extracts.ObjectiveTo develop a simple and standardized method for the detection of total solanesol in potato leaves and its extracts.MethodsN-hexane was chosen as the extraction solvent for three times in the solanesol extraction from potato leaves. HPLC-MS was used for the detection.ResultsThe LOQ was 0.3 µg/g and the linear range was from 0.1 to 50 µg/mL. The precision and stability were evaluated by the relative standard deviations (RSDs) of three samples (potato leaves, Extract-1, Extract-2) for interday and intraday. The accuracy of the method was evaluated by the recoveries of three different spiked concentrations of solanesol for three samples, and results showed it ranged from 80.7% to 99.0% with RSDs less than 8.7%.ConclusionsThe method we established can provide a simple and standardized way for the extraction and detection of total solanesol.HighlightsThe work laid a foundation for the resource reutilization of potato stem and leaf.
研究领域:
植物化学
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分析化学
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药用植物学
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产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 3.7
Yan Gao,Shumin Zhao,Jingwen Huang,Tao Han,Jianshe Zhao
Venturello-structured polyoxometalates (POMs) are effective homogeneous catalysts and confining POMs to size-matched metal-organic frameworks (MOFs) as heterogeneous catalyst is an effective way to improve their practical application. The appropriate pore and narrow window of pristine UiO-67 can not only enclose POMs in single molecule but also limit their leaching and can provide a suitable platform for the oxidation of most sulfur-containing organic compound. The composite (CTA) 3 PW 4 @UiO-67 was prepared by a facile in situ synthesis method, characterized by a variety of means and tested for desulfurization of multicomponent simulated diesel. The results prove that the active component (CTA) 3 PW 4 is effectively encapsulated, and the composite (CTA) 3 PW 4 @UiO-67 show remarkable desulfurization activity and excellent reusability. In addition, the kinetics and possible mechanism of the reaction were investigated. This work opens up a new idea for the design of “host-guest adapted” catalyst suitable for fuel desulfurization technology.
研究领域:
化学工程
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催化科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
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IF 6.065
Jianhong Ma,Yutang Liu,Omar Ali,Yuanfeng Wei,Shuqu Zhang,Yuanmeng Zhang,Tao Cai,Chengbin Liu,Shenglian Luo
Massive consumption of cotton fabrics has brought up a serious problem concerning the waste cotton fabrics (WCFs) disposal. It is widely accepted that if WCFs can be reutilized, there will be great business potentials. Herein, we prepared a double network hydrogel based on WCFs and polyacrylamide (Cellulose/PAM DNHs) for heavy metal removal. The DNHs exhibit fast kinetics that sorption equilibrium is achieved in 5 min because of the porous and sheet-like laminar structures they possess. The DNHs also illustrate excellent adsorption property and good reusability. The tandem two columns packed with Cellulose/PAM-3 can effectively process simulated and practical wastewater, and the adsorption discrepancy is negligible after three adsorption-desorption cycles. The treatment volumes of simulated wastewater are 172.5 BV (7935 mL), 195 BV (8970 mL), and 292.5 BV (13455 mL) for Cd(II), Cu(II), and Pb(II), respectively. Furthermore, the treatment volumes of practical industrial wastewater reach 42 BV (1932 mL) for Cd(II), 63 BV (2898 mL) for Cu(II), and 87 BV (4002 mL) for Zn(II), Pb(II) and Fe, respectively. This work provides a new avenue for the combination of WCFs reuse and heavy metal removal, which is of great importance to the construction of resource sustainability and environment-friendly society.
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
危险品化学品经营许可证（带存储）