Polymers
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2026
·Vol. 18
·期 6
·772
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IF 5.8
Qianyi Wang,Guohan Wang,Sasa Ma,Zichen Wang,Lijie Luo,Yongjun Chen
The widespread use of plastics has inevitably led to the accumulation of persistent plastic debris in aquatic systems, where gradual fragmentation generates microplastics (MPs) that threaten ecological and biological health. Their small size, chemical stability, and resistance to degradation make effective removal particularly challenging. In this work, a composite adsorbent was fabricated through the in situ solvothermal growth of Materials of Institute Lavoisier 100 (Iron) (MIL-100(Fe)) onto coconut shell-derived activated carbon (CSAC), yielding a monolithic material denoted as CSAC@MIL-100(Fe). The integration of porous C with a metal–organic framework created a hierarchically structured adsorbent rich in accessible binding sites. The composite achieved a maximum polystyrene (PS) removal efficiency of 97.4% and maintained 91.44% efficiency after seven regeneration cycles. Stable adsorption performance was observed across a broad pH range. Structural and chemical analyses (scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS)) combined with adsorption modeling revealed heterogeneous multilayer adsorption behavior consistent with the Freundlich isotherm and pseudo-second-order kinetics. π–π interactions, electrostatic attraction, and coordination effects jointly governed PS capture. The Langmuir maximum adsorption capacity reached 746.27 mg/g. These findings demonstrate a practical and recyclable strategy for efficient MP remediation in aquatic environments.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122571
·
IF 7.5
Fei Meng,Muhammad Haris Khan,Shafqat Ali,Zareen Zuhra,Dugang Chen,Zhaowei Zhang
The environmental persistence and potential toxicity of microplastics have raised serious concerns regarding their impacts on aquatic ecosystems and human health. Herein, a Z-scheme heterojunction photocatalyst, MIL-53-NH 2 (Fe)/Bi 2 WO 6 , was rationally constructed to promote directional charge separation and enhance redox reactivity under light irradiation. Interfacial coupling between MIL-53-NH 2 (Fe)/Bi 2 WO 6 facilitates an efficient Z-scheme charge-transfer pathway, preserving the strong oxidation ability of photogenerated holes on Bi 2 WO 6 and the high reduction potential of electrons on MIL-53-NH 2 (Fe). When coupled with peroxymonosulfate (PMS), the heterojunction effectively activates PMS via electron-mediated pathways, leading to the generation of reactive oxygen species (ROS), primarily sulphate radicals (SO 4 •⁻ ), accompanied by the generation of hydroxyl radicals ( • OH) and superoxide radicals( • O 2 ⁻ ). As a result, polystyrene (PS) microplastics undergo accelerated oxidative chain scission, surface oxidation, and mass loss, achieving a weight reduction of 45.36% in the presence of 5 mM PMS. Radical quenching experiments and electron paramagnetic resonance (EPR) spectroscopy collectively confirm the dominant role of PMS-derived ROS and validate the proposed Z-scheme-driven degradation mechanism. This study elucidates the synergistic interplay between heterojunction charge dynamics and PMS activation, offering mechanistic insights into the design of efficient photocatalytic systems for microplastic degradation in aquatic environments.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 12
·702
·
IF 3.5
Yin Shiyu,Du Haiying,Yang Hong,Lai Chunrong
The treatment of industrial wastewater containing multiple heavy metals (MHMs) remains challenging, primarily because conventional adsorbents suffer from poor stability, limited adsorption capacity in mixed-metal systems, or high energy consumption during synthesis. To address these issues, this study employed a room-temperature in-situ impregnation method to load NH 2 -MIL-100(Fe) onto amine-functionalized magnetic hydrochar (HBAP). Three highly dispersible magnetic composites, designated as NM-100-HBAP-X (X = 0.75, 1, 1.25), were synthesized by adjusting the mass ratio of NH 2 -MIL-100(Fe) to HBAP. Experimental results demonstrated that the optimal material (NM-100-HBAP-1) exhibited high adsorption capacities for Pb(II), Cd(II), and Cr(VI) in a mixed-metal system. The maximum adsorption capacities determined by the Langmuir model were 181.13, 175.02, and 158.69 mg/g for Pb(II), Cd(II), and Cr(VI), respectively, which are comparable to previously reported values for hydrochars or MOF-based materials. Mechanistic analysis revealed that amino groups facilitate a synergistic process by reducing Cr(VI) to Cr(III), which is then immobilized via complexation and co-precipitation, thereby further enhancing Cd(II) removal. The material also demonstrated good cycling stability, retaining over 50% of its initial adsorption capacity after five regeneration cycles, and maintained effective performance in various real water samples. Furthermore, toxicity tests confirmed its environmental safety, and life cycle assessment quantified the GWP of producing 1 kg of NM-100-HBAP-1 as 41.224 kg CO 2 eq, with electricity and NH 2 -H 2 BDC synthesis as the dominant contributors. This study not only provides an efficient adsorbent for heavy metal removal but also offers a systematic research framework integrating material design, mechanistic investigation, and environmental assessment for pollution remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Mingjun Xie,Yuying Han,Dandan Wang,Congting Sun,Shuyan Zang
Efficient activation of peracetic acid (PAA) via electron transfer pathway (ETP) is attractive for water treatment, yet flexibly tuning the host electronic environment of single-atom sites while retaining scalability remains challenging. Herein, the concentration of carbon defects (CDs) surrounding Fe–N₅ centers in loofah-derived biochar is tuned by varying the CaCO₃ dosage during one-step carbonization. CaCO₃ concurrently acts as a spacer, in-situ etchant, and CO₂-blowing agent, generating a hierarchically porous framework that exposes Fe–N₅ sites and preserves mechanical integrity. The resulting LP-FeSAC achieves rapid bisphenol A (BPA) removal with k obs = 1.61 min −1 within 9 min across pH 3–11. Increasing CDs density boosts PAA oxidation over the Fe single-atom catalyst, with broad tolerance to water matrices via a non-radical ETP (97.9%). DFT calculations reveal that CDs-induced Fe N bond compression reorganizes the Fe-3d crystal-field manifold (t₂g/eg), upshifts the d-band center, and lowers the interfacial barrier for ETP. In continuous flow, an LP-FeSAC-functionalized hollow-fiber module sustains ≈90% BPA removal for 600 min with minimal Fe leaching (≤12 μg L −1 ). This work establishes defect-guided hierarchical porosity and Fe–N₅ as an accessible co-catalytic anchor for designing ETP-selective, non-radical advanced oxidation, providing a scalable waste-to-resource route toward remediation of emerging aqueous pollutants.
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International Journal of Environmental Research
·
2026
·Vol. 20
·期 6
·302
·
IF 4.3
Jinkui Zhong,Runyujie Ma,Caiya Zhu,Lina Yang,Li Liu,Xiaowen Li,Jing Chen,Yaxin Hu,Xuewen Zhu
Phenolic compounds are widespread industrial pollutants that threaten aquatic ecosystems and human health. Herein, carbon nanotube-supported Fe₃O₄-loaded nano-zero-valent iron (CNTs-Fe₃O₄-nZVI) composites were synthesized via liquid-phase reduction and employed as heterogeneous Fenton-like catalysts with H₂O₂ to degrade bisphenol F (BPF) and bisphenol S (BPS) in aqueous solution. The effects of H₂O₂ concentration, catalyst dosage, and initial pH on degradation efficiency were systematically investigated, and reaction conditions were optimized using the Box-Behnken response surface methodology (RSM). Results showed that at 25 °C, pH 3.0, a catalyst dosage of 0.8 g L⁻ 1 , and H₂O₂ concentrations of 10 mmol L⁻ 1 (for BPF) and 15 mmol L⁻ 1 (for BPS), the degradation efficiencies of BPF and BPS reached 98.03% and 94.30%, respectively, in good agreement with the model-predicted values (96.94% and 93.92%). After four reuse cycles, the degradation efficiencies remained above 70%, confirming good stability and reusability. Isotherm data fitted the Freundlich model better than the Langmuir model for both BPF ( R 2 = 0.9484) and BPS ( R 2 = 0.9091), with negative intercepts indicating multilayer adsorption on heterogeneous surfaces. The adsorption affinity for BPF ( K F = 8.25) was nearly double that for BPS ( K F = 4.37), revealing structure-dependent interfacial interactions. Radical quenching and mass spectrometry indicated HO· oxidation and benzene ring cleavage as the primary BPS degradation pathways. The optimized conditions were determined as H₂O₂ 10.74 mmol L⁻ 1 , catalyst 0.733 g L⁻ 1 , and pH 2.836 by RSM. TOC removal reached 64.22% for BPF and 67.97% for BPS, and ecotoxicity assessment confirmed that the degradation intermediates exhibited substantially reduced toxicity, demonstrating effective detoxification.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Guo Junxiang,Cheng Zhengming,Peng Shan,Yin Youhao,Wu Jianlong,Gu Mingyuan,Mei Zhang
The efficient resource utilization of inorganic solid waste steel slag is greatly desired. However, its global utilization rate remains low, underscoring the urgent need for novel and effective processing routes. In this paper, Fe-MOF was successfully synthesized using steel slag as the raw material, which was inserted into the layers of the two-dimensional material MXene to achieve a composite structure, which was then deposited onto a superhydrophilic fiber cloth made from recycled waste cotton pads. The resultant composite material exhibited superior and stable superhydrophilic and underwater superoleophobic properties through complex intermolecular forces of glycyrrhizic acid (GA)-based ligand compounds. The highly hydrophilic GA formed gel-like protecting layer, which strongly maintained the stable superhydrophilic layer of the composite. The introduction of Fe-MOF enhanced the interlayer spacing of MXene and formed heterojunctions at the interface, greatly improving electron transport between the two semiconductors and significantly promoting the photothermal response speed and intensity of the system. Under photothermal action, this composite material can be used for quick separation of viscous oil/water mixtures and emulsion systems, demonstrating excellent oil pollution resistance and cycled usage rate. This composite textile also achieved flame-retardant properties. This paper not only reported a new oil/water separation material but also provided a new pathway for the high-value utilization of steel slag and the recycling of waste cotton pads. Graphical abstract
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Chang Liu,Liting Wang,Lu Wang,Heyang Sun,Yakun Wang,Zhiyong Guo
Ferrihydrite with different Al contents was prepared for norfloxacin degradation. • A total of 24 degradation products were identified and 3 pathways were proposed. • The ECOSAR prediction and inhibition zone tests were used for toxicity analysis. • Strategies for removing pollutants using Fe Al mineral catalysts are proposed. The high surface area and reactivity of ferrihydrite nanoparticles facilitate the transformation of contaminants. However, the interaction mechanisms between Al-substituted reconstituted ferrihydrite (Al-Fh) catalysts and contaminants are not well understood, which limits our ability to predict and optimize their environmental reactivity. In this study, we focused on the typical fluoroquinolone antibiotic, norfloxacin (NOR), and investigated its degradation characteristics and mechanisms in five Al-Fh catalytic systems under three pH conditions. It was confirmed that pH regulated the molecular configuration and charged distribution of NOR by density functional theory calculations. This affected the selection of the degradation pathway and the efficiency of electron transfer. The inhibition zone tests for Staphylococcus aureus and Escherichia coli showed that the diameters decreased by 20.44 mm and 18.39 mm, respectively. The predicted toxicity of NOR and its degradation products showed that over 80% of the degradation products were harmless substances, and the toxicity of the products was minimal at pH = 7.5, posing less potential risk to the ecological environment. The findings of this study contribute to a deeper understanding of the interaction mechanisms between Al-Fh catalysts and fluoroquinolone antibiotics, and provide critical insights to mitigate the environmental risks posed by these emerging contaminants. Download: Download high-res image (135KB) Download: Download full-size image
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Journal of Energy Storage
·
2026
·
IF 10.7
Kaixin Xie,Xiaobo Chen
In the pursuit of advanced energy storage solutions, materials featuring high porosity, robust redox activity, and abundant electrochemically accessible sites are highly attractive candidates for next-generation supercapacitor electrodes. In this study, a binder-free positive electrode material consisting of porous MnCo 2 O 4 particles directly coated onto carbon cloth (MnCo 2 O 4 @CC) was synthesized via a straightforward hydrothermal process followed by thermal treatment. Additionally, the incorporation of redox additives into electrolytes has been identified as a promising approach to elevate electrochemical supercapacitor performance. To this end, we designed an aqueous asymmetric supercapacitor (ASC) system utilizing MnCo 2 O 4 @CC and activated carbon (AC) electrodes, where potassium ferricyanide (K 3 [Fe(CN) 6 ], denoted as KFCN) was introduced as an electrolyte additive to augment pseudocapacitive behavior. The electron migration mechanisms and charge storage dynamics of MnCo 2 O 4 @CC in a KOH + KFCN electrolyte were systematically investigated. The MnCo 2 O 4 @CC electrode immersed in a 3 M KOH + 0.05 M KFCN solution exhibited a high specific capacitance of 2206.7 F g −1 at 1 A g −1 , along with low resistance characteristics and exceptional cycling durability. A complete aqueous MnCo 2 O 4 @CC//KOH + KFCN//AC ASC was assembled, demonstrating enhanced specific capacitance, extended cycle life (94.5% capacitance retention after 10,000 cycles), and an ultrahigh energy density of 79.9 Wh kg −1 at 799.6 W kg −1 . These findings provide significant electrochemical insights and demonstrate the great potential of the MnCo 2 O 4 @CC-KOH + KFCN system for next-generation supercapacitor applications.
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DESALINATION
·
2026
·
IF 9.9
Weiwei Wang,Yiyao Xu,Changchen Wu,Zhiwei Chen,Zhe Xu,Guangze Nie
A single-step displacement–capture strategy enables efficient separation of Ni(II)–citrate complexes. • High-spin Fe(III)-D001 composites efficiently decomplex Ni(II)–citrate and simultaneously recover Ni(II). • The strong complexation ability of high-spin Fe 3+ with citrate ligands is crucial for the decomplexation of Ni(II)–citrate. • Fe(III)-D001 exhibits effective decomplexation and Ni recovery in real wastewater. Heavy metal–ligand complex wastewaters pose persistent challenges for industrial water treatment and separation processes, as strong chelation by organic ligands severely limits the effectiveness of conventional adsorption and ion-exchange methods. Herein, we develop a single-step, regenerable separation strategy that integrates Fe(III)-driven metal displacement with ion-exchange capture for the efficient decomplexation of nickel–citrate complexes (Ni(II)–citrate) and simultaneous recovery of Ni(II). Fe(III)-functionalized cation-exchange resins (Fe(III)-D001) enriched with high-spin Fe(III) species were synthesized via a continuous ion-exchange process in aqueous solution. The resulting material exhibited effective removal of Ni(II)–citrate, achieving a maximum capacity of 87.74 mg g −1 . In contrast, Fe(III)-modified resins prepared in dimethylformamide, which predominantly contain low-spin Fe(III), showed markedly reduced removal performance. Mechanistic investigations reveal that high-spin Fe(III) acts as the displacement-active center, preferentially coordinating with citrate ligands and promoting the decomplexation of Ni(II)–citrate, while residual sulfonic acid groups on the resin enable the immediate capture of liberated Ni(II) via ion exchange. Fixed-bed operation further demonstrates stable separation performance under ion-rich conditions, highlighting the practical applicability of the proposed approach. This work provides a process-intensified route for treating chelated metal wastewaters and offers a promising separation strategy for complex industrial water matrices relevant to desalination and advanced wastewater treatment applications. Download: Download high-res image (271KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Shuo Zhang,Chenxi Chang,Tong Xu,Qingyuan Zhang,Wenxia Zhao,Xiuling Cai,Zidan Li,Bin Zhu
An interface-engineered S-scheme BiOBr/CoFe-LDH heterojunction photocatalyst was fabricated via a facile one-pot hydrothermal method to boost CIP degradation. The crystal structure, morphology, optoelectronic properties and interfacial charge transfer behavior were systematically characterized by XRD, TEM, XPS, photoelectrochemical measurements and density functional theory (DFT) calculations. The optimized 5-BOB/LDH/PMS/Vis system achieved ∼90% CIP removal within 60 min for 20 mg L −1 CIP solution, with an apparent rate constant 1.7-fold and 11.3-fold higher than those of pristine CoFe-LDH and BiOBr, respectively. The catalyst exhibited excellent practical applicability: it retained 81.5% activity after 5 consecutive cycles, maintained high degradation efficiency over a broad pH range (4–11) and showed universal degradation capability toward tetracycline, rhodamine B, acetaminophen and sulfadiazine. Mechanistic studies revealed that the constructed S-scheme heterojunction not only suppressed charge carrier recombination but also upshifted the d-band center of Fe species, enhancing PMS adsorption and accelerating the synergistic redox cycle between Co and Fe active sites. This work provides a rational design strategy for high-performance PMS-activating photocatalysts and demonstrates great potential for the advanced treatment of antibiotic-containing wastewater.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2026
·
IF 4
Aihong Tang,Yujuan Cao,Manli Guo,Bixia Lin
One-step synthesis of magnetic nitrogen-doped porous carbon (MNPC). • The addition of urea promotes the graphitization degree of MNPC. • MNPC serves as an MSPE adsorbent with excellent reusability. • Good analytical performance for chloramphenicol in honey is obtained. Magnetic porous carbon (MPC) materials derived from metal-organic frameworks (MOFs) inherit the high porosity and tunable pore structure of MOFs and also endow the materials with magnetic response, demonstrating great potential for magnetic solid-phase extraction (MSPE). However, MPCs obtained directly by carbonizing MOFs suffer from issues such as easy pore collapse and a single surface chemical functionality, which necessitate modification methods to improve their performance. The nitrogen-doping strategy offers unique advantages in charge distribution, the creation of active sites, alterations in surface chemical properties, and enhanced structural stability. Therefore, a magnetic nitrogen-doped porous carbon (MNPC) derived from NH 2 -MIL-88(Fe) was developed as an MSPE adsorbent, combined with liquid chromatography, for sensitive determination of trace amounts of chloramphenicol in honey samples. The developed method exhibits a good linear relationship in the range of 0.05-50 μg·L -1 , with R 2 of 0.9999, LOD (S/N=3) of 0.005 μg·L -1 , and LOQ (S/N=10) of 0.02μg·L -1 . The spiked recovery rate ranged from 93.5% to 99.2%, and the RSD ranged from 1.3% to 10.7%. Therefore, this method has significant potential for routine monitoring of chloramphenicol residues in food safety supervision.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122892
·
IF 7.5
Chengbin Zhong,Junxia Yu,Boxi Wu,Qingbiao Zhao,Kairui Zhou,Jia Wang,Li Guo,Ruan Chi,Zhen Luo,Xiang Zhang
Iron, a prevalent impurity in dechroming sludge (DCS), poses a major challenge to the recovery and purification of valuable metals such as Cu, Ni, and Zn in wet processing. There is an urgent need for an efficient and selective iron separation technique that minimizes the loss of Cu, Ni, and Zn. In this study, an innovative combined approach of acid leaching and on-line adsorption was developed to selectively recover Fe 3 + from DCS. Results indicated that acid leaching with 0.05 mol/L H 2 SO 4 achieved extraction efficiencies of 98.2% for Fe 3+ , 99.0% for Cu 2+ , 94.6% for Ni 2+ , and 96.5% for Zn 2+ , yielding a leachate containing approximately 93.5 mg/L Fe 3+ . A phosphonic acid-functionalized resin (X-Fe resin) was then used to selectively remove Fe 3+ from the leachate. Batch adsorption experiments demonstrated higher adsorption capacity, rapid kinetics, and good reusability of the resin. Dynamic adsorption tests in the unitary, binary, and ternary systems revealed an affinity order of Fe 3+ >Cu 2+ >Zn 2+ >Ni 2+ , with competitive substitution favoring selective Fe 3+ uptake. EDS-mapping (Energy-Dispersive X-ray Spectroscopy mapping), XPS (X-ray Photoelectron Spectroscopy), and DFT (Density Functional Theory) analysis demonstrated that the high adsorption affinity was due to the more negative binding energy between Fe 3+ and the resin. When treating the DCS, the dynamic on-line adsorption process efficiently recovered of 95.3% of Fe 3 ⁺, and the final effluent had less than 5.0 mg/L Fe, meeting the requirements for industrial production standards. This work focuses on an innovative combination process of acid leaching and selective adsorption for iron removal, which offers a sustainable route for purification and resource recovery in a hydrometallurgical process.
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