INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Donglei Wei,Xiaoxia Liu,Zichen Wu,Hou Chen,Liangjiu Bai,Huawei Yang,Lixia Yang,Wenxiang Wang,Xiaofeng Zhang,Junling Wang
Cellulose-based polymer brush-on-brush composite adsorbent is prepared under simple and mild conditions via a four-step two sequential organophotocatalyzed atom transfer radical polymerization for the efficient removal of Hg(II) from aqueous media. The defined structure of the cellulose-based composites was supported by the characterization results. Influences of solution pH, temperature and adsorbent dosage on the adsorption behavior of the adsorbent were determined by batch experiments. The adsorption performance of the polymer brush composite intermediate was also investigated as a comparison to the final adsorbent to illustrate the significance of the topological surface structure on adsorption efficiency and capacity. Adsorption kinetics, isotherm and mechanism were studied systematically to further clarify the adsorption process. In addition, the adsorbent exhibits good applicability as it can be reused for 5 times without obvious decrease in desorption rate (>90 %), which showed potential utility for preconcentration and recovery of aqueous Hg(II).
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jia-Xin Li,Yun-Jie Zhao,Yan-Fei Yu,Qi-Qi Huang,Shi-Chao Qi,Xiao-Qin Liu,Lin-Bing Sun
As a pollutant widely presented, the dye needs deep purification treatments after use. The traditional ways for dye purification cannot meet the need of selective purification for dyes, especially for the separation between anionic and cationic dyes. In this study, we employ three-dimensional (3D) printing technology to prepare composite sorbents (FGA-PCs) with porous carbon (PC) and foaming gelatin aerogel (FGA). Microscopic analysis indicates that the composite sorbents have well-defined lattice structures. The S BET value of the representative sorbent is 1019 m 2 g −1 , and the pore-volume is 1.43 cm 3 g −1 . After adsorption treatment for 60 min, the purification rate of anionic dyes Orange-G (OG) and Methyl-Orange (MO) reach 99 % and 92 %, respectively, with a representative sorbent FGA-PC. In contract, those of cationic dyes Azure-A (TA) and Rhodamine-B (RB) are only 0.55 % and 9.5 %, respectively, showing excellent separation capability for anionic dyes. With the 3D printing, the PC and FGA are combined strongly. According to the experimental and the density functional theory (DFT) results, it can be proved that the electrons of the FGA partially transfer to the PC and the dipole moment of composite sorbents can be changed. Therefore, the composite sorbent FGA-PC displays good adsorption selectivity for anionic dyes.
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
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
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IF 1.6
Zhao Fan,Zhang Wei,Chen Yuantao
The zinc-based metal–organic framework (IRMOF-3) was assembled on the surface of Galdieria sulfuraria (Gs) via a one-pot method to fabricate the composite adsorbent Gs/IRMOF-3. Results show that the material achieves optimal adsorption performance at pH = 6. The adsorption process follows the Freundlich isotherm model and pseudo-second-order kinetic model, demonstrating that it is dominated by multi-molecular layer chemical adsorption and represents a spontaneous endothermic process. This study provides a novel strategy for developing efficient and eco-friendly uranyl adsorption materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Lizheng Jin,Zheng Yang,Qing Liu,Jingyi Sun,Boyu Liu,Zheyu Gui,Yue Wu,Kangxin Zhu,Lvfu Song,Xi Chen,Xin Zheng,Sai Wu,Zhehong Shen,Hao Chen,Yajun Pang
Solar-powered atmospheric water harvesting (AWH) technology shows great promise for solving water shortage problems for inland and arid regions. The development of low-cost and low-environmental impact sorbent materials with high water absorption and photothermal properties is critical for their large-scale application. Here, this work develops a high-performance hygroscopic salt-based composite sorbent for solar-powered AWH by taking agricultural waste straw as an example. The straw-based sorbent is facile to prepare, low-cost, environmentally friendly, and offers favorable adsorption and desorption properties. Specifically, high porosity, excellent hydrophilicity, and photothermal conversion properties can be integrally achieved by phytic acid-assisted one-step hydrothermal pretreatment of waste straw, thereby yielding a highly efficient straw/salt-based composite sorbent that can absorb water from the atmosphere over a broad humidity range and rapidly release it when exposed to sunlight. The prepared composite sorbent displays water adsorption from ~0.50 g g −1 to 1.29 g g −1 in the range of 30 % and 90 % relative humidity, exhibiting good capacity to obtain water from the atmosphere. Moreover, solar-driven evaporation desorption can be successfully achieved with an ~0.82 kg m −2 h −1 evaporation rate, double that of the original straw material, showing excellent solar-driven desorption efficiency. Furthermore, the composite sorbent demonstrates promising practical utilization by achieving ~0.81 g g −1 water adsorption and succeeding in condensing and harvesting 69 % of it in the outdoor test under natural conditions. This study provides an affordable solar-powered solution for atmospheric water harvesting together with promoting high-value utilization of agricultural waste.
研究领域:
环境科学
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材料科学
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能源工程
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可持续技术
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水资源管理
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绿色化学
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2021
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IF 7.267
Jingjing Zhu,Can Gao,Fanhe Kong,Kai Zhang,Zhiqing Bai,Jiansheng Guo
The combination of thermal energy storage (TES) unit and solar air heater is one of the most efficient methods for long-term utilization of solar energy. In this study, a series of stable SrCl 2 @SG composite sorbents were prepared based on silica gel (SG) pellets and strontium chloride hexahydrate (SrCl 2 ·6H 2 O) to store low-grade solar thermal energy for space heating application. Composite characteristics, kinetic hydration/dehydration performance of SG and SrCl 2 @SG sorbents were thoroughly studied. Results demonstrated that the SrCl 2 @SG_10 sorbent has the largest sorption capacity of 0.34 g/g at the temperature of 25 °C and relative humidity (RH) of 90% without any liquid leakage . Additionally, kinetic hydration experiments showed that RH has a great impact on the water sorption performance of the TES materials , while the temperature effect is relatively insignificant. The TES performance of sorbents was further investigated in a laboratory prototype reactor with a multilayer structure, which was designed following an open sorption system concept. 800 g of sorbent pellets were evenly distributed on each layer of the sieve. Maximum instant output power and energy storage density of the SrCl 2 @SG_10 sorbent at 70% RH are 19.7 W and 100 kWh/m 3 respectively. Furthermore, the open TES system still maintains a comparatively high TES performance after fifteen charging/discharging cycles.
研究领域:
材料科学
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可再生能源工程
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
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IF 6.953
Ping Sun,Wei Zhang,Binze Zou,Lincheng Zhou,Zhengfang Ye,Quanlin Zhao
Attapulgite (ATP) has a unique porous layered chain structure and is an excellent environment-friendly decolorizer. However, its high viscosity makes it difficult to separate. First, it was combined with magnetic Fe 3 O 4 nanoparticles to obtain Fe 3 O 4 -ATP that is easy to recycle and reuse. Then, Fe 3 O 4 -ATP nanoparticles were embedded in chitosan (CS) gel beads, and glutaraldehyde was used for cross-linking and curing. Lastly, ethylenediaminetetraacetic acid (EDTA) was successfully connected to Fe 3 O 4 -ATP/CS gel beads through amidation reaction, which further increased the capability of the adsorbent to adsorb heavy metal ions. The prepared magnetic composite adsorbent is a sphere with a rough surface and porous structure. The maximum adsorption capacity of the prepared Fe 3 O 4 -ATP/EDTA/CS adsorbent for Pb(II), Cu(II), and Ni(II) is 368.32, 267.94, and 220.31 mg g −1 , respectively. After 5 times of repeated use, Fe 3 O 4 -ATP/EDTA/CS still showed good adsorption capacity for Cu(II), Pb(II), and Ni(II). Fe 3 O 4 -ATP/EDTA/CS has a large adsorption capacity for heavy metal ions, a wide pH applicability, good reuse, and rapid magnetic separation. In addition, Cu(II) loaded Fe 3 O 4 -ATP/EDTA/CS also showed good catalytic degradation performance for bisphenol A. This study prepared a new type of adsorbent with good adsorption performance and provided a promising method for the treatment of wastewater.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xiaoran Zhang,Linlin Gao,Qiuyue Hu,Xingyu Wang,Xin Gao,Lincai Peng,Keli Chen,Heng Zhang
Utilizing environmentally friendly bio-adsorbents with ultra-high adsorption capacities to remove antibiotics from aqueous environments is a potential strategy in addressing global water pollution. Herein, a novel carboxyl-functionalised nanocellulose adsorbent (H-BTCA-RC) was successfully prepared from agricultural waste-derived regenerated cellulose (H-RC) and 1,2,3,4-butanetetracarboxylic acid (BTCA). The prepared H-BTCA-RC was used to evaluate its adsorptive performance for removing typical antibiotic ciprofloxacin (CIP) from water. Its efficiency was optimized based on factors such as pH, contact time, initial antibiotic concentration, temperature, and adsorbent dosage. Notably, the dispersion of H-RC chains among a matrix of encasing urea molecules with high-speed shear induced facilitates the development of well-ordered micro- and nanostructures inside H-RC, letting to a relatively high compressive strength of 200.5 kPa at 80 % strain. Results suggested that the intricate network composed with micro- and nanoscale H-RC architecture of the fibers functions as a scaffold for adsorbent, enhancing the availability of reactive –OH and increasing the accessibility for pollutants contact. Furthermore, the incorporation of BTCA facilitated the formation of adequate covalent bonds and hydrogen bonding interactions among H-RC fibers, culminating in a denser structural network within the cryogel. The adsorbent exhibited excellent adsorption characteristics of CIP with a removal efficiency of 95.63 % and an adsorption capacity of 300.01 mg/g. Additionally, the adsorbent showed high recyclability, retaining efficacy exceeding 91 % throughout more than ten cycles. This work demonstrates that cellulosic antibiotic adsorbent materials have potential in the utilization of agricultural waste for the efficient extraction of antibiotics from aquatic environments.
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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DOI
高影响因子
ACS Omega
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2022
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IF 4.132
Shang Wei,Jiayi Wu,Peng Chen,Bo Fu,Xinbao Zhu,Muhua Chen
To enhance the dye adsorption capacity of zeolitic imidazolate framework-67 (ZIF-67), phosphotungstic acid (HPW) was integrated into ZIF-67 to prepare composite adsorbents. Characterization results demonstrated that the electronegative HPW was uniformly and tightly deposited on the electropositive ZIF-67. Methylene blue (MB) was selected as a model contaminant to evaluate the adsorption performance of hybrid adsorbents. Results showed that HPW@ZIF-67 had excellent adsorption capacity toward cationic MB. The optimal ZIF-67-0.2 HPW sample with a HPW dosage of 9.9 wt % presented an adsorption capacity of 446.4 mg g–1. ZIF-67-0.2 HPW displayed good reusability, and the adsorption data can be well described by pseudo-second order and Langmuir isotherm models. The adsorption mechanism was ascribed to the preferred electrostatic attraction and π–π stacking between MB and composite adsorbents. This work provides a route to enhance organic dye removal efficiency of ZIF materials through regulation of surface charge property and sheds light on the development of ZIF-based adsorbents.
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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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2018
·Vol. 93
·期 9
·2691-2700
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IF 2.587
Zhuqing Wang,Pengxiang Jin,Min Wang,Genhua Wu,Jiayin Sun,Yujie Zhang,Chen Dong,Aiguo Wu
BACKGROUND In this study, a low-cost and environment-friendly alginate–chitosan hybrid adsorbent (depicted as Alg-Chi) was developed for the removal of Pb 2+ from water. RESULTS Experimental results showed that the Alg-Chi exhibits high selectivity and affinity for Pb 2+ . The selectivity coefficients of the Alg-Chi for Pb 2+ /Cr 3+ , Pb 2+ /Co 2+ Pb 2+ /Cd 2+ , Pb 2+ /Zn 2+ , and Pb 2+ /Cu 2+ are all >5. It can uptake 96.8% of Pb 2+ from Pb 2+ -containing solutions (1.5 mmol L −1 ), and the maximum adsorption capacity for Pb 2+ reaches 468.5 mg g −1 , which is higher than that of most reported adsorbents for Pb 2+ . Moreover, the Alg-Chi can also be regenerated via simple acid elution and used repeatedly without loss in adsorption ability. CONCLUSIONS Analysis of the adsorption mechanism indicated that the Alg-Chi adsorbed Pb 2+ mainly through ion exchange and chemical coordination. Green and low-cost raw materials, simple preparation process, efficient removal efficiency and recyclable, these characteristics give the synthetic Alg-Chi broad application prospects in the field of Pb 2+ -containing wastewater treatment. © 2018 Society of Chemical Industry
研究领域:
环境科学
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材料科学
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高影响因子
ENERGY
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2025
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IF 9.4
Longkun Zhou,Zhipeng Luo,Shuai Du,Wenjun Ying,Jiayun Wang
Water scarcity poses a critical global challenge, particularly in arid and off-grid inland regions. Solar-driven atmospheric water harvesting (SAWH) offers a promising solution to freshwater shortages; however, existing systems are hindered by two key limitations: suboptimal material adsorption/desorption performance and inefficient thermal management in device design. To address these challenges, this study presents a hydrogel composite-based SAWH device featuring an optimized thermal insulation structure. The composite sorbent, rGO@Cur-LiCl—synthesized by integrating reduced graphene oxide (rGO) with lithium chloride (LiCl) and bio-derived curdlan (Cur)—exhibits exceptional adsorption-desorption kinetics and high water uptake capacities of 1.74 and 3.01 g g −1 at 30 % and 60 % relative humidity (RH), respectively. The designed passive SAWH device incorporates a dual-chamber thermal insulation configuration, a dual-layer acrylic radiative-convective barrier, and a modular adsorbent bed, enabling two full daily cycles. Under one-sun irradiation at 30 °C and 30 % RH, the system achieves a remarkable water yield of 2.33 L m −2 day −1 , outperforming state-of-the-art counterparts by 2–5 times. This work advances a sustainable strategy for decentralized freshwater production in water-scarce regions.
研究领域:
环境科学
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材料科学
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能源工程
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可持续技术
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水资源管理
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Shiqi Xia,Congli Cui,Dong Li,Li-jun Wang
The composite adsorbent consisting of sodium alginate (SA) and quaternary ammonium-functionalized chitosan (QACS) was prepared using the calcium slow-release method to remove high-molecular-weight invert sugar alkaline degradation products (HISADPs) from the beet juice. The SA/QACS composite adsorbent has a honeycomb porous structure. Comparing the single-component QACS dispersion and SA adsorbent, the incorporation of SA increased the storage/elastic modulus ( G′ ) and loss/viscous modulus ( G′′ ) of the SA/QACS composite hydrogels, while the incorporation of QACS enhanced the adsorption capacity of the SA/QACS composite adsorbents. Specifically, when 5 % QACS and 2 % SA were added, both G' and G" of the SA/QACS adsorbent were approximately 100 times greater than those corresponding to the QACS dispersion. Concurrently, its maximum adsorption capacity attained 164.5 mg/g, which was superior to that of the SA adsorbent. The adsorption isotherms and adsorption kinetics further demonstrated that the Langmuir model and the pseudo-second-order (PSO) model were congruent with the adsorption data of the SA/QACS composite adsorbent concerning HISADPs. Overall, these findings highlight the potential of the SA/QACS adsorbent as an effective adsorbent for the removal of HISADPs from beet juice.
研究领域:
食品科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
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2021
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IF 5.485
Bing Wang,Mingyang Xiong,Bin Shi,Zhuoying Li,Huan Zhang
A carbon-nanotube-nested diatomite adsorbent (CND-composite adsorbent) was successfully prepared and introduced to remove organic contaminants from shale gas flowback water. The CND-composite adsorbent was then characterized using Scanning Electron Microscopy, Brunauer Emmett Teller, Mercury Intrusion Porosimetry and X-ray Diffraction (XRD) analyses. The changes in the organic species present in the shale gas flowback water before and after adsorption were characterized via Gas Chromatography-Mass Spectrometer. The kinetics, isotherms and thermodynamics of the adsorption of organic matter in shale gas flowback water on the CND-composite adsorbent were investigated on the basis of static experiments. The CND-composite adsorbent had hierarchical mesoporous/ macroporous structures. The adsorption experiments indicated that the maximum removal efficiency for total organic carbon was 78.91 %. The adsorption mechanisms mainly involved intermolecular interactions, electrostatic interaction and hydrogen bonds. Results showed that the Freundlich isothermal model and pseudo-second-order model were suitable for the characterization of the adsorption process in this work. The changing values of thermodynamic parameters, including the Gibbs free energy, entropy, and enthalpy, indicated that the adsorption process was spontaneous and endothermic. In addition, the adsorption process was jointly controlled by physical and chemical mechanism. In summary, the CND-composite adsorbent has potential for utilization in the removal of organic pollutants in real wastewater.
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
危险品化学品经营许可证（带存储）