Desalination and Water Treatment
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2024
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IF 1
Jingxi Tie,Zhihong Zheng,Xiaomei Zheng,Yaru Hao
The water-soluble protein was extracted from Moringa oleifera seed press cake and tested its performance as a natural coagulant for removing humic acid (HA) from water solution when comparing to polyaluminum chloride (PAC), a commercial coagulant. Influencing factors including pH, coagulant dosage, temperature and suspended solid were investigated in this study. The results indicated that the coagulating efficiencies of HA using the Moringa oleifera seed protein (MOSP) were better than those by PAC under all the experimental conditions at the same dosage. MOSP could increase the zeta potential more efficiently than PAC. The Fourier transform infrared spectra revealed that no new compounds were generated during the coagulation process. Hence, adsorption and charge neutralization could be the main mechanism contributing to the HA removal using MOSP as coagulant. MOSP is an ideal natural coagulant for HA removal.
研究领域:
环境科学
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水处理技术
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天然产物应用
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环境工程
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胶体化学
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高影响因子
Journal of Environmental Sciences
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2018
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IF 3.12
Fan Bu,Baoyu Gao,Qinyan Yue,Xue Shen,Wenyu Wang
Coagulation–ultrafiltration (C–UF) is widely used for surface water treatment. With the removal of pollutants, the characteristics of organic matter change and affect the final treatment efficiency and the development of membrane fouling . In this study, we built a dynamic C–UF set-up to carry out the treatment of micro-polluted surface water, to investigate the characteristics of dissolved organic matter from different units. The influences of poly aluminum chloride and poly dimethyldiallylammonium chloride (PDMDAAC) on removal efficiency and membrane fouling were also investigated. Results showed that the dosage of PDMDAAC evidently increased the UV 254 and dissolved organic carbon removal efficiencies, and thereby alleviated membrane fouling in the C–UF process. Most hydrophobic bases (HoB) and hydrophobic neutral fractions could be removed by coagulation. Similarly, UF was good at removing HoB compared to hydrophilic substances (HiS) and hydrophobic acid (HoA) fractions. HiS and HoA fractions with low molecule weight accumulated on the surface of the membrane, causing the increase of transmembrane pressure (TMP). Membrane fouling was mainly caused by a removable cake layer, and mechanical cleaning was an efficient way to decrease the TMP.
研究领域:
环境工程
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水处理技术
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膜分离
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有机地球化学
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给水处理
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Shuangshuang Hou,Hui Gao,Peixuan Xie,Shiwei Jin,Fengtian Wu,Bien Tan
Microporous hyper-cross-linked polymers appending variant electron-withdrawing functional groups have enormous potential for selective CO 2 adsorption and separation, whereas these functionalities by lowering the charge density of monomers will decrease their reaction activity, which in turn is unfriendly for the direct and highly efficient preparation of polymers with high CO 2 uptake capacity. Herein a new amide “insertion” strategy for knitting polymers with ideal electron-withdrawing functionalities was advanced, and in this manner, a series of carboxyl enriched novel polymers were synthesized via the one-pot Friedel-Crafts alkylation reaction by using fluorene derivatives as emerging building blocks. The created polymer 3 possessing BET surface area 1947 m 2 g −1 have a CO 2 uptake of up to 20.03 wt% at 273.15 K/1.00 bar. Besides, the carboxyl and amide groups in structure could bestow the polymers an enhanced CO 2 /N 2 selectivity of 33.17 at 273.15 K. In addition, the hierarchical porosity and CO 2 adsorption capability of manufactured polymers can be intriguingly tailored, and prolonging the carboxylated side chains of building blocks by inserting different quantities of amide group will be propitious for bettering the porosity and CO 2 capturing capacity of manufactured polymers. Supported by charge density distribution simulation and electrostatic potential calculation, the peculiar changes in polymer structures and CO 2 adsorption features were also explained.
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Small
·
2025
·Vol. 21
·期 47
·e09150
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IF 12.1
Yuxuan Zhu,Shunlong Ju,Long Yao,Guanglin Xia,Xuebin Yu
Metallic aluminum (Al) is an attractive anode material for Al-ion batteries owing to its high theoretical capacity and low cost. However, Al metal anodes suffer from surface passivation, dendrite growth, and parasitic reactions, hindering the practical applications of Al-ion batteries. Herein, a modified Al metal anode with a bismuth (Bi) artificial surface layer (Bi@Al) is developed by a facile in-situ substitution reaction method. The Bi layer accelerates the desolvation, nucleation, and Al 3+ migration process, thereby facilitating homogeneous Al 3+ distribution and rapid Al plating/stripping. Therefore, the modified Al metal anode achieves high reversibility and stability even under high current densities and capacities. As a result, Bi@Al symmetric cells exhibit a lifespan over 500 h at 10 mA cm −2 and 10 mAh cm −2 . Furthermore, combined with the graphite cathode, the Bi-modified Al metal full cell delivers a capacity of 80.1 mAh g −1 after 1000 cycles at 1.0 A g −1 . This work provides a valuable method to modify the Al metal anode for developing high-performance non-aqueous Al-ion batteries.
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PubMed
高影响因子
Scientific Reports
·
2026
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IF 4.9
Peng Xiaoxia,Gong Qiang,Gao Ruirui,Ci Xiaorui,Jin Zilu,Dou Zhifang,Song Jianfang,Song Lijuan
This study demonstrated that extraction temperature serves as a critical parameter for modulating the structural characteristics and Pb 2+ adsorption performance of natural low methoxyl pectin derived from sunflower ( Helianthus annuus ) heads, an abundant agricultural byproduct. Pectin extracted at 100 °C for 3 h (AHP) exhibited a lower molecular weight ( M w , 78.2 kDa), higher galacturonic acid (GalA) content (83.32%±3.52%), and lower degree of esterification (DE, 26.34%±1.52%) compared to its low-temperature counterpart (LHP, extracted at 80 °C for 1 h, 84.68%±3.86% GalA, 29.32%±2.18% DE, and bimodal M w of 316.4 and 115.7 kDa) and commercial citrus pectin (CP, 76.83%±3.74% GalA, 83.24%±3.22% DE, and M w of 573.1 kDa). Consequently, AHP achieved a superior Pb 2+ adsorption capacity of 295.86 mg/g, exceeding that of LHP and CP by 25.7% and 76.6%, respectively. The adsorption process was best described by the Langmuir isotherm and pseudo-second-order kinetic models ( R 2 > 0.99), indicating a monolayer, chemisorption-dominated mechanism. Integrated characterization using FT-IR, XPS, SEM-EDS, BET and competitive adsorption experiments revealed that the enhanced performance of AHP originated from the synergistic effect of a high content of accessible carboxyl groups and a reduced M w that minimized chain entanglement. This combination enhanced active-site accessibility and promoted the formation of an open, permeable, ion-crosslinked network upon Pb 2+ coordination. This work repositioned extraction from a mere isolation step to a rational design strategy for high-performance biosorbents, offering a sustainable approach to valorize agricultural residues into effective materials for heavy metal remediation.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Xin Bao,Xuteng Wu,Yinghe Jin,Dehao Kong,Xiaoqi Liu,Yifu Zhang,Xinlin Yang,Hui Wang,Xi Yuan,Hui Li
Arising from multiple triplet emission centers with distinct lifetimes, the time-dependent afterglow color (TDAC) phenomenon demonstrates significant potential for dynamic phosphorescence anti-counterfeiting and information encryption. However, insufficient spectral separation between triplet emissive peaks usually confines TDAC in carbon dots (CDs) to narrow color ranges, limiting distinguishability and security in advanced optical applications. Herein, a broad-range TDAC transition from deep orange to cyan within 1 s was achieved in an aluminum-ion doped CDs based composite (Al-CD@ Urea) via a rational synthesis process. The multi-confinement effect arising from the urea and silica matrix collectively facilitates triplet exciton stabilization and suppresses non-radiative transitions, thereby promoting enhanced phosphorescence emission in the composite system. Aluminum doping modifies the bandgap of CD, which realizes a blue TADF (peak at 450 nm) and a red RTP (peak at 590 nm) simultaneously under 360 nm excitation in composite system. The dual afterglow emission with distinct lifetimes collectively drives the observed broad color range TDAC phenomenon. Leveraging the broad-range TDAC properties in the Al-CD@ Urea, we developed dynamic afterglow anti-counterfeiting labels and a concept of information encryption with enhanced distinguishability and security, demonstrating practical viability for advanced optical applications.
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Analytical Methods
·
2026
·
IF 3
Xixuan Chen,Lei Zheng,Rongzhen Ma,Phong H. N. Vo,Jiaxin Ni,Songjun Guo
This study presents an improved ethanol-mediated solvothermal method for synthesizing malic acid/urea-derived carbon dots (MUCDs) for the highly selective and sensitive detection of mercury ions (Hg2+). The detection limit was enhanced by over an order of magnitude compared to previous methods employing similar precursors, achieving a limit of detection of 88.46 nmol L−1, which meets the European Union standard for mercury discharge in industrial wastewater (250 nmol L−1). Pyrophosphate (P2O74−) has been used as a highly effective masking agent for Fe3+, substantially boosting the probe's performance in complex matrices. With practical application in mind, the environmental safety of these carbon dots was proactively evaluated using a zebrafish model. The assessment demonstrated no significant toxicity at concentrations up to 100 mg L−1, establishing a 10-fold safety margin relative to the operational dosage. Fluorescence imaging revealed accumulation specifically in the intestinal tract, with no distribution to vital organs, confirming their environmental safety. Under optimized conditions, the MUCDs achieved a quenching efficiency of 0.82 in the presence of 25 µmol per L Hg2+ at a concentration of 10 mg L−1, while also demonstrating thermal stability and pH tolerance. Spike-recovery tests in tap water, river water, and metallurgical wastewater samples yielded satisfactory recoveries ranging from 93.85% to 101.86%. Based on the characterization of MUCDs and the MUCDs–Hg2+ complex, the observed quenching mechanism was explained by chelation between Hg2+ and surface functional groups, leading to aggregation, static quenching, and enhanced Rayleigh scattering. This study highlights the critical importance of incorporating comprehensive environmental safety assessments into the development of functional nanomaterials.
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Junyuan Shi,Zihang Yin,Dejin Lin,Dingfeng Wang,Siting Peng,Wendi Xiao,Houwen Hu,Jiong Cheng,Da Chen
The pervasive issue of pharmaceutical overuse in agriculture and veterinary practice has led to the alarming accumulation of drug residues within the global food supply chain, posing a direct and escalating threat to consumer safety. Among these contaminants, compounds such as chlorogenic acid (CGA) and tinidazole (TNZ) are of particular concern due to their potential to provoke allergic responses and cause long-term adverse health effects. There is an urgent need for the development of rapid and reliable detection techniques capable of on-site monitoring to effectively mitigate these risks and ensure food safety. Herein, our work develops an innovative ratiometric sensing strategy that utilizes the dual-excitation properties of nitrogen-doped carbon dots (N-CDs) to simultaneously detect CGA and TNZ. Remarkably, as a fluorescent nanoprobe, N-CDs are capable of detecting CGA over a concentration range of 0.036-40 μM with a limit of detection (LOD) of 36 nM, which is attributed to static quenching (SQE) and the inner filter effect (IFE). Differently, the addition of TNZ results in fluorescence quenching of N-CDs via localization of inner filter effect (L-IFE), presenting the LOD of 68 nM within the 0.068-25 μM range. Furthermore, a portable smartphone-assisted platform which incorporates the N-CDs/PVA composite film successfully enables visual detection of CGA and TNZ with satisfactory recoveries in real samples. These results suggest that the developed portable smartphone-assisted fluorescence platform enables accurate dual-target detection of CGA and TNZ while offering outstanding stability and reproducibility suitable for on-site applications. Consequently, our methodology presents a versatile and practical strategy for real-time pharmaceutical residue screening, significantly advancing food safety monitoring capabilities.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Kangjie Zhou,Zhengping Fang,Shuaiyuan Wang,Yong Liu,Zushun Xu,Hai Liu
Biopolymer-derived aerogels are gaining attention as sustainable and environmentally friendly substitutes for traditional synthetic counterparts. However, their large-scale utilization has been constrained by complicated preparation steps and limited mechanical integrity. In this work, we propose a low-cost and efficient route to construct robust chitosan/cellulose nanofiber (CS/CNF) aerogels through an ice-confined in situ dual cross-linking process that integrates physicochemical interactions, followed by rapid ambient-pressure drying. A subsequent dip-coating with polydimethylsiloxane (PDMS) and thermal curing further enhanced the surface and interfacial stability of the materials. The resulting CS/CNF@PDMS composite aerogels exhibit superior compressive strength (340 kPa at 80% strain), low thermal conductivity (42.7 mW m −1 K −1 ), and improved flame-retardance when subjected to direct butane flame for 20 s. Benefiting from the robust hydrophobic skeleton, the aerogels achieve efficient oil–water separation with high adsorption capacities (16.8–33.2 g/g) for various oils and organic solvents, maintaining excellent reusability. Additionally, the MXene-modified CS/CNF aerogel delivers a solar-driven water evaporation rate of 2.02 kg m −2 h −1 under one-sun illumination in simulated seawater with evaporation efficiency exceeding 96%. This straightforward and scalable strategy produces biopolymer-based aerogels that are mechanically durable, thermally insulating, flame-retardant, and multifunctional, offering broad potential for environmental cleanup and solar-assisted water purification.
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WASTE MANAGEMENT
·
2026
·
IF 7.3
Juan Yang,Yu Wang,Jing Mei,Cheng Zou,Yanhua He,Tianmei Chen,Kui Liu,Qichang Pan
Traditional methods for recovery metals from spent lithium iron phosphate (LFP) leachate often suffer from insufficient selectivity, Li loss and incomplete Al removal. To address these challenges, this study proposes a two-step complexation-ion exchange synergistic strategy for the selective separation of Fe, Al and Li. In the first step, a 717-type Cl − -form anion exchange resin is used to preferentially adsorb [FeCl 4 ] − formed in spent LFP leachate mixed with NaCl solution, with a Fe adsorption efficiency of 99% and almost no adsorption of Al and Li. In the second step, according to the significant stability difference of the anionic oxalate-complex with Al and Li, oxalic acid is introduced in the Fe-free solution to convert Al into [Al(C 2 O 4 ) 2 ] − and/or [Al(C 2 O 4 ) 3 ] 3− proved by density functional theory calculation, molecular dynamics simulation, analysis of mass spectra and infrared spectra. The aluminum-oxalate complexes are subsequently adsorbed by 717-type OH – -form anion exchange resin with good cycling stability, leading to the 98% Al removal with no Li loss. The rapid Al/Li separation is demonstrated by kinetics study, which reveals Al adsorption conforms to pseudo-first-order model and is jointly controlled by liquid film and intraparticle particle diffusion. The proposed method shows strong potential for efficient separation of metals in spent LFP battery materials.
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COMPUTERS AND ELECTRONICS IN AGRICULTURE
·
2026
·
IF 10.3
Liru Yan,Bianxiang Zhang,Wei Zhou,Chao Feng,Caihong Zhang,Yan Zhang,Shaomin Shuang,Lihong Shi
Highly-intelligent user-friendly sensing strategies are becoming desperately demanded and indispensable in under-developed nations and resources-insufficient areas. Herein, an intelligent sensing platform has been successfully established incorporating smartphone with machine vision and deep learning function, 3D-printed handheld device, and paper microfluidic chip stained with tri-emission ratiometric-fluorescence (FL) carbon dots (TCDs). The intelligent system can quantify zinc ion (Zn 2+ ) and ethylenediaminetetraacetic acid (EDTA) only through a single-step operation on smartphone. TCDs, engendering bright blue and cyan FL as well as weak red one at 370 nm excitation, were prepared hydrothermally using tartaric acid and alizarin carmine. As-prepared TCDs exhibit continuous FL color transformation from blue to purple to blue with the addition of Zn 2+ and EDTA. Subsequently, TCDs-based paper chip is explored to enable field-portable sequential discrimination of Zn 2+ and EDTA. Intriguingly, the proposed sensor is utilized for fast and intelligent quantification of Zn 2+ and EDTA in soil filtrate, plant sap and tap water with a low detection limit of 3.8 μM and 7.9 μM, as well as wide linear correlations of 0–280 µM and 0–560 µM, respectively. It is eagerly anticipated that our methodologies will become the strong impetus for new round of technological transformation for analyte assay.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Haiyue Yu,Zimin Yao,Guoliang Zheng,Yan Zhao,Dantong Zhu,Fanxu Bu
The Zn 2+ level in gastric juice serves as a powerful reference for the distinction of benign/malignant lesions. However, its accurate detection remains challenging due to the complex and highly acidic samples. Herein, a ratiometric fluorescence probe was developed based on quinoline-functionalized carbonized polymer dots (CPDs) for Zn 2+ accurate detection. The probe has two emission bands at 410 nm and 490 nm. The quinoline groups on the CPDs can form coordination bonds with Zn 2+ , enabling specific recognition of zinc ions. Zn 2+ addition can lead to fluorescence quenching of quinoline component of quinoline/CPD probes in simulated gastric fluid samples, while the emission of the CPDs remains almost unchanged. This ratiometric response between emission intensity at 410 nm and 490 nm enables accurate quantitative detection of Zn 2+ . The probe exhibited a detection sensitivity of 4.56 nM for Zn 2+ and demonstrated outstanding selectivity against other metal ions, attributed to its self-calibration capability. This work offers a novel strategy for designing ion sensing platforms and holds great potential for aiding the diagnosis of gastrointestinal diseases.
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