WATER AIR AND SOIL POLLUTION
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2025
·Vol. 236
·期 10
·1-14
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IF 3
Liu Jingliang,An Fengxia,Zheng Di,Li Chao,Sun Jingya
In this study, Mn-Ni-layered double hydroxides (Mn-Ni-LDHs) were synthesized and utilized to activate peroxymonosulfate (PMS) for degrading reactive brilliant blue KN-R (KN-R) in aqueous solutions. The characterization results demonstrate that the catalysts synthesized are layered structures, and the surface area is 169.3 m 2 /g. The Mn-Ni-LDHs exhibited significant efficiency effective for the degradation of KN-R via activating PMS, achieving 96.5% degradation of KN-R within 90 min under optimal conditions (0.20 g/L catalyst, 10 mM PMS, pH=10.0 and 25°C). The reaction followed pseudo-first-order kinetics with a rate constant of 0.0351 min -1 , and the apparent activation energy was calculated to be 11.94 kJ/mol. Electron paramagnetic resonance (EPR) and free radical scavenging experiments identified ·O 2 − and 1 O 2 as the primary reactive species involved in the reaction for KN-R degradation. The proposed catalytic mechanism suggests that redox cycling between Mn 4+ /Mn 3+ and Ni 3+ /Ni 2+ within Mn-Ni-LDHs plays a critical role in enhancing PMS activation, thereby promoting the continuous generation of active oxygen species.
研究领域:
环境科学
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化学工程
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材料科学
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水处理技术
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高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Xinyu Liu,Bowen Xu,Jianlong Wang
In this study, sponge-like chitosan capsules (CTS-S) were successfully prepared as efficient adsorbent through a facile and green method. The cross-linked porous structure and abundant adsorption sites of CTS-S led to stable and remarkable adsorption efficacy for the purification of wastewater containing anionic dyes in a wide pH range. The highest maximum adsorption capacity for Congo red (CR), Reactive brilliant blue KN-R (KNR), and Methyl blue (MB) were 1372.49, 881.75, and 169.04 mg/g, respectively. Kinetics study suggested that KN-R and CR adsorption processes were best depicted by the PSO model, while PFO model was applicable for MB. Adsorption isotherms of CR, KNR, MB conformed to the Sips model, demonstrating that the adsorption of CR, KNR, MB onto CTS-S was monolayer and heterogeneous. Adsorption mechanism insights further verified that electrostatic forces, hydrogen bonds, and n-π stacking worked for efficient removal of CR, KNR, MB by CTS-S, which was supported by characterization results and DFT calculation. Overall, CTS-S provided a useful and promising option as low-cost and eco-friendly absorbents for the adsorption of synthetic dyes.
研究领域:
环境科学
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化学工程
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材料科学
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高影响因子
Journal of Water Process Engineering
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2025
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IF 6.7
Xingtao Xue,Min Yao,Junxin Yu,Huiyun Lu,Yubo Liu,Hongbin Wang,Huasheng Gao
The widespread use of antimony as a catalyst in the textile industry presents risks to ecosystems and human health. This study investigated the removal of Sb(V) using three iron-based coagulants —polymeric ferric sulfate (PFS), ferric chloride (FeCl 3 ), and ferrous sulfate (FeSO 4 )—via coagulation-sedimentation, and elucidates the coagulation mechanism by speciation analysis and characterization of precipitate. At a wastewater pH of 5–6, PFS and FeCl 3 achieved 96 % removal of 1.0 mg-Sb/L with a dosage of 12 mg-Fe/L, while FeSO 4 showed only 78 % removal, primarily due to the requisite oxidation step to Fe(III) before hydrolysis and precipitation. Phosphate ions, organic dyes and humic acids could compete with Sb(V), thereby reducing its removal efficiency. Sequential chemical extraction and instrumental characterization analysis revealed that the primary components of the precipitate were FeSbO 4 and Fe r SbO 4 (OH) 3r-3 when PFS or FeCl 3 was used as the coagulant. During Sb(V) removal process employing FeSO 4 coagulant, a large portion of Fe(II) underwent direct reaction with Sb(V) to form FeSb 2 O 6 , while the remaining fraction was oxidized to Fe(III) and generated FeSb 2 O 6 and Fe r SbO 4 (OH) 3r-3 via the Fe(III) reaction pathway. The removal of Sb(V) was mainly due to chemical precipitation (90 %) and hydrolysis adsorption (10 %). PFS coagulation is a promising method for removing Sb(V) from textile wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Dongcheng Li,Shenghu Wang,Huanji Song,Xianying Xu,Shihao Yang,Yuyang Dong,Yan Luo,Weiyang Lv
Efficient and sustainable Fenton-like systems are highly desired for degrading persistent pollutants. However, their development is often hindered by the slow redox kinetics and poor durability of single active sites in conventional metal-based catalysts. Herein, we developed a bimetallic Fe/Cu catalyst (FeCu-BN) with highly dispersed metal sites anchored on boron nitride (BN), which offered boosted activity and stability via the cooperative redox cycles between Fe and Cu sites. The FeCu-BN catalyst achieved nearly 100% removal of sulfamethoxazole (SMX) within 20 min through activating peroxymonosulfate (PMS), with a rate constant of 0.421 min − 1 significantly surpassing those of its monometallic counterparts and other advanced catalysts. Systematic experiments and theoretical calculations revealed that the Cu sites not only optimized the electronic structure of the Fe sites but also provided electrons extracted from pollutants to promote the Fe 2+ /Fe 3+ cycle, thereby triggering concerted radical and non-radical reactions for SMX elimination. Consequently, the FeCu-BN/PMS catalytic system operated stably over a wide pH range and exhibited exceptional tolerance to various inorganic ions and complex aqueous matrices. Furthermore, in a continuous flow membrane reactor, the system maintained efficient SMX removal over 20 h without significant performance loss. This work uncovered the synergistic redox cycling mechanism in bimetallic catalysts and offered valuable insights for designing dual-site catalysts for environmental remediation.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Chao Wang,Peijuan Chu,Tengfei He,Cheng Yi,Yue Yao,Lijia Liu,Chunhong Zhang
The application of membrane separation technology in wastewater treatment and pharmaceutical purification has attracted considerable attention. The development of a membrane with effective separation performance and antibacterial properties is of considerable interest for the separation and purification of antibiotics. Here, a thin-film composite (TFC) polyester membrane with effective antibiotic removal and antibacterial properties was fabricated via a facile one-step interfacial polymerization (IP) strategy. Naringenin (Nar), a natural product of flavonoid material derived from the pericarp, was utilized as the aqueous monomer. The suitable reactivity of Nar afforded the resulting membrane with a highly negative charged surface. The rejection performances for the antibiotics cephalothin, cefuroxime sodium, ceftriaxone sodium, and cefoperazone sodium were 96.3 %, 97.7 %, 99.2 %, and 99.8 %, respectively. The pure water permeance was 7.5 L m −2 h −1 bar −1 at a transmembrane pressure of 5 bar. The antibacterial efficacy was greater than 99.0 % against Escherichia coli and Staphylococcus aureus , attributable to the flavonoid structure of Nar. The present work proposed a feasible strategy to prepare TFC membranes with high nanofiltration performance and intrinsic antibacterial efficacy.
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ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Bingyan An,Meng Dong,Xuewei Zhou,Man Zhang,Beini Zeng,Yajie Shu,Jinming Zhang,Jinfeng Wang
Traditional cotton textile dyeing processes are extensively dependent on electrolytes and auxiliaries, generating wastewater laden with hydrolyzed dyes and salts that present substantial environmental risks. This work developed a water-saving and less-salt dyeing method for cotton textiles by integrating deep eutectic solvent (DES) swelling pretreatment. This innovative approach alters the intra- and intermolecular hydrogen bonding of cellulose, inducing structural modifications, such as increased fiber diameter, enhanced amorphous cellulose content, and expanded porous architecture. These changes significantly improve dye accessibility and the uptake efficiency. Among the DES systems evaluated, K2CO3-glyceryl DES exhibited the highest Sw% in cotton fibers (59.5%). DES swelling method offers significant advantages over conventional processes, such as reduced environmental impact (e.g., lower water/energy consumption, fewer harsh chemicals), enhanced dye uptake efficiency, or improved fiber integrity. Furthermore, the DES retained its swelling efficacy after multiple recycling cycles, underscoring its reusability. This advancement not only aligns with eco-friendly textile manufacturing goals but also demonstrates economic viability.
研究领域:
纺织科学
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环境科学
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高影响因子
Nature Communications
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2025
·Vol. 16
·期 1
·1-11
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IF 15.7
Qian Hui,Wang Yuxuan,Zhou Xibin,Gu Tao,Wang Hui,Lyu Hao,Li Zhikai,Li Xiuxu,Zhou Huan,Guo Chengchen,Yuan Fajie,Wang Yajie
The UniProt database is a valuable resource for biocatalyst discovery, yet predicting enzymatic functions remains challenging, especially for low-similarity sequences. Identifying superior enzymes with enhanced catalytic properties is even harder. To overcome these challenges, we develop ESM-Ezy, an enzyme mining strategy leveraging the ESM-1b protein language model and similarity calculations in semantic space. Using ESM-Ezy, we identify novel multicopper oxidases (MCOs) with superior catalytic properties, achieving a 44% success rate in outperforming query enzymes (QEs) in at least one property, including catalytic efficiency, heat and organic solvent tolerance, and pH stability. Notably, 51% of the MCOs excel in environmental remediation applications, and some exhibited unique structural motifs and unique active centers enhancing their functions. Beyond MCOs, 40% of L-asparaginases identified show higher specific activity and catalytic efficiency than QEs. ESM-Ezy thus provides a promising approach for discovering high-performance biocatalysts with low sequence similarity, accelerating enzyme discovery for industrial applications.
研究领域:
生物信息学
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酶工程
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工业微生物学
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PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
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IF 15.7
Lin Jiuyang,Yu Zijian,Chen Tianci,Huang Junming,Chen Lianxin,Li Jiangjing,Li Xuewei,Huang Xiaolei,Luo Jianquan,Ang Elisa Yun Mei,Toh William,Wang Peng Cheng,Ng Teng Yong,Seo Dong Han,Zhao Shuaifei,Zhong Kuo,Xie Ming,Ye Wenyuan,Van der Bruggen Bart,Wan Yinhua
During the synthesis of dyes, desalination of high-salinity dye-containing waste liquor is a critical premise for high-quality, clean dye production. Conventional membrane processes, such as electrodialysis, nanofiltration and ultrafiltration, are inevitably subjected to serious membrane fouling, deteriorating the dye/salt fractionation efficacy. Integrating the technical merits of electrodialysis and pressure-driven membrane separation, we devise an electro-driven filtration process using a tight ultrafiltration membrane as alternative to conventional anion exchange membrane for rapid anion transfer, in view of dye desalination and purification. By employing a sub-4 nanometer tight ultrafiltration membrane as anion conducting membrane, the electro-driven filtration process achieves 98.15% desalination efficiency and 99.66% dye recovery for one-step fractionation of reactive dye and NaCl salt, markedly outperforming the system using commercial anion exchange membranes. Notably, the electro-driven filtration system displays a consistently high and stable fractionation performance for dyes and salts with unprecedentedly low membrane fouling through an eight-cycle continuous operation. Our results demonstrate that the electro-driven filtration process using nanoporous membranes as high-performance anion conducting membranes shows a critical potential in fractionation of organic dyes and inorganic salts, unlocking the proof of concept of nanoporous membranes in electro-driven application.
研究领域:
环境科学
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化学工程
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材料科学
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PubMed
高影响因子
DYES AND PIGMENTS
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2025
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IF 4.2
Wenjie Gong,Man Zhang,Yun Li,Meng Dong,Yuan He,Beini Zeng,Yajie Shu,Kunkun Zhu,Jinming Zhang,Jinfeng Wang
Inspired by grapevine morphology, we propose cellulose-based polymer dyes that promote the growth of dye chromophores ("grapes") onto cellulose. Through homogeneous derivatization, we systematically synthesized a series of polymer dyes incorporating varied cellulose contents (2 ∼ 6 wt%) and diverse reactive dye structures (mono- and dual-functional groups), achieving salt-free coloration of cotton fabrics. Comprehensive characterization of FT-IR and UV-vis spectroscopy verified the covalent grafting of reactive dyes onto the cellulose. The 4 wt% cellulose formulation demonstrated optimal rheological properties and structural stability, achieving 74.9% dye uptake without electrolytes, which was a significant improvement over the 56.4% typical of traditional high-salt/high-alkali processes. Fabrics dyed with this formulation exhibited the deepest color intensity, hydrophilicity, breathability, and maintained mechanical properties. The performance enhancement arises from synergistic effects of polymer chain entanglement between dye-cellulose conjugates and cotton fibers, establishing a sustainable alternative to traditional dyeing by simultaneously eliminating salt usage.
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JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Zhipeng Zhang,Jie Chen,Yan Ke,Xi Du,Xiaoqun Qiu,Liming Zhou,Yugao Zhang,Minghui Qiu,Jing Guo,Xu Jiang,Lu Shao
The treatment and reuse of high-salinity dyeing wastewater remains a critical challenge in the cotton textile industry, where lamellar graphene oxide (GO) membranes show significant potentials but are limited by permselectivity and stability of their channels. Herein, the porous covalent organic framework nanosheets (CONs) incorporated GO (GO/CON) membranes with engineered separation nanochannels were fabricated by a continuous rod-coating strategy using Mayer bars. Specifically, the incorporation of porous TpPa-SO 3 H nanosheets into GO membranes enhanced membrane permeability and dye/salt selectivity, attributed to the introduction of additional porous channels and the strengthened electrostatic properties from CONs. This GO/CON membrane exhibits exceptional durability during continuous cross-flow operations exceeding 300 h in high-salinity dyeing wastewater. Furthermore, the high-salinity permeate was successfully reused for dyeing cotton fabrics, producing textiles with minimal color differences, thereby demonstrating both environmental sustainability and economic viability for practical industrial applications.
研究领域:
环境工程
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材料科学
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化学工程
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膜技术
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纺织科学
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高影响因子
Nano Research
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2024
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IF 9.5
Zhang Kai,Dai Yu,Shi Yongli,Zhang Zhaoxin,Li Linji,Zhang Xiaojin,Xia Fan
Nanofilms that can fast permeate solvents and accurately sieve molecules are of significant importance for separation. A promising strategy is to align the inner cavities of macrocycles into the channels within nanofilms, and control the channel size by selecting the macrocycles. However, the channels outside the macrocycles are ignored. Here, we prepare nanofilms with hydrophobic channels (cyclodextrin inner cavity) and hydrophilic channels (cyclodextrin outer space) through interfacial polymerization of azobenzene-4,4′-dicarbonyl dichloride and amino-functionalized β-cyclodextrin. By utilizing the significant geometric changes caused by the photoisomerization of azobenzene, nanofilms with adjustable hydrophilic channel sizes were obtained. Our nanofilms have high permeability to polar and non-polar solvents, and can distinguish molecules with almost the same molecular weight but different shapes. This work expands the development of next-generation nanofilms generated through interfacial polymerization by incorporating rational molecular design.
研究领域:
材料科学
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化学工程
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高影响因子
AICHE JOURNAL
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2024
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IF 3.5
Xue-Li Cao,Tian Tian,Yong Bai,Chun Cui,Cong Luo,Jiang-Shan Xing,Chuan-Yu Chen,Lili Zhao,Shi-Peng Sun
Traditional nanofiltration membranes often struggle to maintain stability in harsh environments due to issues like swelling, chemical bond dissociation, and polymer chain creep. Fluoropolymers like poly(ethylene-chlorotrifluoroethylene) (ECTFE) are promising substrate candidates for broad-spectrum corrosion-resistant nanofiltration (CRNF) membranes, but their solvent insolubility and hydrophobicity present significant processing challenges. This study harnesses the electrospinnability and abundant reactive sites of polyvinyl alcohol to create a reactive site-bridged nanofibrous network. This network provides reactive sites to decorate the hydrophobic ECTFE substrate and bridges the molecular selective layer through aldolization, Schiff base reactions, and esterification. The resulting robust thin-film nanofibrous composite membranes exhibit high rejection rates for small molecular dyes under a variety of harsh conditions, including exposure to 10 wt% H 2 SO 4 , 1 M NaOH, ethanol, N , N -dimethylformamide, N -methylpyrrolidone, and 80°C solutions. This work paves the way for designing next-generation broad-spectrum CRNF membranes, enhancing their applicability in diverse harsh environments.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
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