Journal of Water Process Engineering
·
2026
·
IF 6.6
Lixun Fan,Yonggang Zhao,Mingli Ye,Hongyun Niu,Yaqi Cai
NH₂-MIL(Fe) is grafted onto amino-functionalized NH₂-PS resin to gain micro-nanoscale adsorbent. • SMX adsorption is favorable at pH 5.2–8.0 with an adsorption capacity of 250.61 mg·g −1 . • Hydrogen bonding and electrostatic attraction are the driving forces for SMX adsorption. • The Fe(III) centers in MOF endow NH₂-PS@NH₂-MIL(Fe) Fenton-like catalytic activity. Sulfonamide antibiotics (SAs) are ubiquitous in the aquatic environment and difficult to remove using conventional wastewater treatment processes. Adsorption and Fenton-like oxidation are efficient techniques for the elimination of SAs from water. In this study, a novel hierarchical micro-nano structural adsorbent was synthesized by grafting Fe-based MOFs (NH 2 -MIL(Fe)) onto amino-functionalized polystyrene-divinylbenzene resin (NH 2 -PS). The physicochemical properties and structural features of the composite (NH 2 -PS@NH 2 -MIL(Fe)) were systematically characterized by SEM, EDS, XRD, FTIR, BET and XPS, confirming the successful immobilization of NH 2 -MIL(Fe) on the PS surface and the presence of abundant active sites. The adsorption behavior of sulfamethoxazole (SMX) on NH 2 -PS@NH 2 -MIL(Fe) was evaluated under various conditions, including pH, adsorbent dosage, and coexisting anions. The adsorption process followed the pseudo-second-order kinetic model and Langmuir isotherm model, indicating a monolayer sorption with a maximum capacity of 250.6 mg·g −1 at pH 5.2 and thermodynamic analyses revealed that the adsorption was spontaneous and exothermic. Based on FTIR, XRD and XPS analyses, electrostatic attraction, hydrogen bonding, π–π stacking, and metal–ligand coordination/Lewis acid-base interaction collectively governed the adsorption of SMX. Furthermore, the Fe(III) centers endowed NH 2 -PS@NH 2 -MIL(Fe) Fenton-like catalytic activity. With the addition of H 2 O 2 , over 95% of SMX was eliminated rapidly from water in a wide pH range. Based on the dual functions, this material can efficiently remove SMX from surface water samples. These results highlight the great potential of NH 2 -PS@NH 2 -MIL(Fe) for efficient removal of sulfonamide antibiotics. Download: Download high-res image (319KB) Download: Download full-size image
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Toxics
·
2025
·Vol. 13
·期 11
·946
·
IF 4.1
Jin Liu,Yankun Zhang,Fengyuan Chen,Dandan Duan,Xiaoping Diao
In the environment, the coexistence of microplastics (MPs) with other pollutants may either enhance or reduce the toxicity of MPs themselves or the co-occurring pollutants toward microalgae. This phenomenon is particularly notable when MPs interact with emerging pollutants, such as ultraviolet absorbers. This study investigates the single and combined exposure effects of ultraviolet absorber (Butyl methoxydibenzoylmethane, BMDM, 50 μg/L) and MPs (Polystyrene, PS, 10 mg/L, d = 1 μm) onChlorellasp. with a stress duration of 7 days. The results showed that cell density, chlorophyll a (Chla) concentration, and physical properties of cell surface integrity were higher in the combined stress group compared to the BMDM single stress group. Furthermore, transcriptome sequencing analysis revealed that the number of differentially expressed genes (DEGs) in the combined exposure group (885 DEGs) was lower than in the single exposure groups (BMDM: 1870 DEGs and PS: 9109 DEGs). Transcriptomic profiling indicated that individual stressors of BMDM and PS disrupted 113 and 123 pathways, respectively, predominantly associated with protein synthesis and energy metabolism. Conversely, combined exposure significantly enriched 86 pathways, including ribosome function and oxidative phosphorylation, thereby manifesting an antagonistic effect. This study provides new insights into the effects of BMDM and PS onChlorellasp. and offers valuable information for the risk assessment of multiple pollutants.
研究领域:
环境毒理学
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藻类学
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生态毒理学
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转录组学
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海洋污染
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Xinyi Li,Yan Li,Zhuo Wang,Tao Xu,Minqiang Hong,Xiaobin Zhao,Xuhui Mao
The dissolved organic matters in the membrane concentrates often cause scaling/blockage problems and significantly deteriorate the quality of the recovered salts when the evaporation crystallization process is used to treat membrane concentrates. It is important to find a cost-effective method to decrease the dissolved organic matters in concentrates. This study explores the feasibility of using an ultraviolet/peroxysulfate/ozone (UV/PS/O 3 ) process for the degradation of organic matters in nanofiltration membrane concentrates (NMCs). The UV/PS/O 3 process outperformed other processes, including UV photolysis alone, PS oxidation alone, UV/PS, and UV/O 3 , and achieved a complete oxidative degradation of 200 mg/L quinoline (QL) within 40 min in concentrated Na 2 SO 4 solutions. The experiments also revealed that OH and SO 4 − were the primary reactive radicals for QL oxidation in the UV/PS/O 3 process. QL removal efficiency increased along with the amount of aerated O 3 , the PS dosage, and was especially enhanced under a weakly alkaline condition. The response surface analysis showed that the optimal condition for QL removal was 4.68 mM PS, 3.43 mg/L O 3 gas, and pH ini 8.43. The presence of chloride ions (5–15 mM) inhibited the removal of QL. When the combination of UV/PS/O 3 process and evaporation crystallization was examined for the treatment of real NMC from a coking plant, it was found that the heating process could thermally activate the residual PS for the removal of organic impurity, and the whole process allowed to recycle sulfate salts with better brightness from the NMC. This study provides a prospective technology for the efficient treatment of NMC wastewater.
研究领域:
环境科学
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水处理工程
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JOURNAL OF CHROMATOGRAPHY A
·
2026
·
IF 4
Chenyue Zhu,Chuanxiang Yao,Huiting Qin,Wei Zhang,Xinyue Zheng,Siying Zheng,Xinyuan Ye,Ying Xiong,Lili Jiang,Sen Li,Meiqin Wang,Hongliang Jiang,Zhifeng Du
The presence of deamination impurities in phosphorothioate oligonucleotides (PS-ONs) presents a significant challenge to quality control, as their detection is complicated by minimal mass differences from the parent molecule and difficulties in chromatographic separation. Herein, a bottom-up strategy based on enzymatic digestion, chemical derivatization, and liquid chromatography-tandem mass spectrometry (LC-MS/MS) was proposed for the sensitive qualitative and quantitative analysis of trace cytosine deamination in PS-ONs. Fomivirsen (FMVS) and its deamination impurity were used as models. The method involved digestion with S1 nuclease, followed by derivatization of the 5’-phosphorothioate in digests with N-(tert-butyldimethylsilyl)-N-methyltrifluoroacetamide (MTBSTFA) to enhance chromatographic retention and mass spectrometric response. This approach effectively eliminated the need for ion-pairing (IP) reagents. The mass shift upon deamination was amplified in the smaller digested fragments, and a unique isotopic pattern in the derivatized products, specifically, the decrease of the first isotopic peak and the increase of the second isotopic peak was exploited for quantification. The method demonstrated excellent linearity over a weight ratio of deamination product to prototype range from 0.05:1 to 0.9:1. Satisfactory accuracy (80–120%) and precision (RSD < 15%) were achieved. Furthermore, the precise deamination site (C8) within a sample containing 10% deamination impurities was successfully identified. Thus, this method provides a powerful tool for profiling deamination impurities in PS-ONs, with potential applications in quality control, stability studies, and the characterization of other nucleic acid modifications.
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Advanced Materials Interfaces
·
2021
·Vol. 8
·期 17
·2100889
·
IF 6.147
Yeguang Zhang,Yong Qi,Shufen Zhang
Due to its high refractive index, photocatalytic activity, and photoinduced superhydrophilicity, TiO 2 has advantages in photonic crystals (PCs). However, the composite of TiO 2 and PCs needs to be calcined at high temperatures, and the structural stability of the composites is poor. In this study, photoinduced superhydrophilic TiO 2 –poly(hydroxyethyl acrylate)/polystyrene (PHEA/PS) PC composites with strong structural colors and self-cleaning are fabricated by coating triethanolamine-modified anatase TiO 2 nanoparticles-hydroxyethyl acrylate on the surface of PS PCs. The ordered arrays can be retained after the superficial layers of PS PCs are filled with TiO 2 –PHEA, and vivid blue, green, and red composites can be obtained. The water contact angles of the composites can be reduced to 3° in 0.4 s, and superhydrophilicity can be maintained for 180 days in a laboratory environment. The declining superhydrophilicity can be restored under UV irradiation. The composites can degrade the adsorbed methylene blue under UV irradiation. Photocatalytic activity and superhydrophilicity impart self-cleaning ability on the composites. The locking of PS arrays by TiO 2 –PHEA enhances the structural stability of the composites, making them resistant to water soaking and washing. Therefore, the composites show prospects for decoration, fabric coloring, and wearable electronic devices.
研究领域:
材料科学
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纳米技术
·
光学
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COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 301
·期 4
·293-302
·
IF 2.4
Duan Li,Guo Congshuai,Fan Jinlong,Duan Yufeng,Qiu Pengju,Huang Ping,Yan Junxia
Magnetically assisted separation method is a rapid and easy technique based on the separation and isolation of magnetic substance by the application of an external magnetic field. However, the service life of absorbents using polystyrene as skeleton is heavily shorted by the intrinsic brittleness of polystyrene. A novel method of preparing porous magnetic polystyrene particles modified with EVA targeting to eliminate the problems of homogeneous polystyrene is described. The optimum hydrophile-lipophilic-balance (HLB) value, phase inversion temperature, and cloud point of the combined emulsifier selected in this work are analyzed and the optimized preparation conditions are determined accordingly. TEM and SEM show that the particles have a morphology structure that most of Fe 3 O 4 particles are embedded in the interior. The dimension distribution of the pores in porous PS/EVA/Fe 3 O 4 particles mainly belongs to mesopore. XRD indicates that the Fe 3 O 4 particles keep their intrinsic crystal structure in the prepared porous magnetic particles.
研究领域:
材料科学
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化学工程
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纳米技术
·
高分子科学
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分析化学
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POLYMER BULLETIN
·
2023
·Vol. 81
·期 1
·969-993
·
IF 3.2
Li Chen,Zhen Weijun
Modified attapulgite (ATP-PS) grafted with polystyrene (PS) was prepared based on Pickering emulsion polymerization. The characterization of ATP-PS was studied by transmission electronic microscopy (TEM), X-ray photoelectron spectrometer (XPS), Fourier transform infrared spectrometer (FTIR) and contact angle analysis. TEM analysis showed that the surface of ATP-PS was coated with PS organic layer; XPS analysis showed that the proportion of C element in ATP-PS was much larger than that of ATP; FTIR analysis found that ATP-PS had more PS specific functional group peaks than that of ATP; Moreover, contact angle results showed that the hydrophobicity of ATP-PS was significantly improved compared with ATP. The above characterization analysis proved that the modification of ATP-PS was successful. Moreover, polyphenylene sulfide (PPS) hydrophobic porous membrane was prepared with 1-chloronaphthalene and dibutyl phthalate as mixed diluents and ATP-PS as additives. The results showed that 0.8 wt% of ATP-PS had a great effect on the structure and performance of the membrane. With the increasing of the mass proportion of ATP-PS in the preparation of PPS base membrane, the microstructure of PPS based membrane was changed from blocky bicontinuous to spherical granular bicontinuous. When the addition amount of ATP-PS was 0.8 wt% of the total mass of PPS base membrane, PPS based membrane had strong hydrophobicity and organic solvent affinity, and its n -butanol flux could reach 106.9642 L m −2 h −1 bar −1 . The rheological properties of PPS based membrane showed that ATP-PS was well compatible with the PPS, and ATP-PS was beneficial to crosslink between PPS molecular chains, thereby increasing the mechanical properties of PPS based membrane. Phase transition analysis demonstrated that ATP-PS (0.8 wt%) increased the melting temperature (2.34 °C) and crystallization temperature (2.63 °C) of PPS based membrane compared to PPS, thus allowing PPS to complete the phase transition at higher temperature interval during film formation, resulting in a stable microscopic cluster structure. Based on hydrophobic porous PPS membrane, PPS/ATP-PS/TA nanocomposites membrane with ATP-PS selective layer was prepared by co-deposition of tannic acid (TA) and ATP-PS on the surface of PPS membrane. The performance of PPS/ATP-PS/TA nanocomposites membrane was studied, which showed that the n -butanol flux of PPS/ATP-PS/TA nanocomposites membrane was 61.2913 L m −2 h −1 bar −1 . More importantly, the simulated filtration performance of MB dye organic waste liquid (the solvent is n -butanol) showed that the maximum rejection rate of MB dye reached 99.82%. These results demonstrate that PPS/ATP-PS/TA nanocomposites membrane will have potential application in the filtration of organic dye wastewater.
研究领域:
材料科学
·
高分子科学
·
化学工程
·
膜技术
·
环境科学
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表面改性
·
纳米技术
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Wenya Chen,Qiao Huang,Qingyun He,Shun Cheng,Xiaojuan Liang,Zhaoping Chen,Weidong Xiang
Nowadays, an all-inorganic metal halide perovskite (CsPbX3, X = Cl, Br, and I) has shown excellent prospects in liquid crystal display (LCD) backlight device applications. However, in order to better meet the market’s development, the stability of CsPbX3 still remains an urgent problem to be solved. Herein, a heat-water cyclic process of CsPbBrI2 glass powder (RGP) designed to improve stability is proposed. Excitingly, the treated RGP shows better optical properties and heat resistance. Moreover, RGP@PS was prepared with high blue light, water, and heat stabilities. It is particularly noteworthy that RGP6@PS was continuously exposed for 268 h at 60 °C and 90% relative humidity in the blue light (447 nm, 880 W/m2) environment with no decrease in brightness. It illustrates that the CsPbX3 films have made an important breakthrough in stabilities. The LCD device based on RGP@CsPbBr3@PS was designed with a wider color gamut (126%) compared with NTSC 1953. This study explores a new strategy to improve the stability of CsPbX3 thin films for LCD light conversion films.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Baogang Su,Hui Pan,Linbo Li,Linjun Shao,Chenze Qi,Shujing Zhou,Jinjing Li
Design and preparation of highly active and stable supported palladium catalysts have garnered increased attention for their easy separation and reusability. Herein, MCM-41 mesoporous materials functionalized by four different amino functional groups were synthesized by using four commercially available siloxanes and then used to support palladium catalysts. The Fourier transform infrared spectroscopy (FT-IR) was used to analyze the chemical structures of functionalized MCM-41 supports. The thermogravimetric analysis (TGA) and element analysis (EA) were employed to determine the grafting densities of functional groups on MCM-41 supports. The mesoporous structures of functionalized MCM-41 supports and dispersion of palladium species were characterized by high resolution transmission electron microscopy (TEM) and X-ray diffraction patterns (XRD). A study of the materials using positron annihilation lifetime spectroscopy (PALS) reveals the different ortho-positronium ( o -Ps) annihilation properties of the supported palladium species on the four supports. Meanwhile, the catalytic activities of supported palladium species on the four supports were evaluated by the Heck reactions of iodobenzene with n-butyl acrylate. At last, the annihilation properties of the supported palladium species on the four supports were successfully correlated with their catalytic activities. The result suggests a facile method to determine and predict the catalytic activities of supported palladium species by using PALS, which may hold great potential in the preparation of rationally designed and highly active supported palladium catalysts.
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NANOTECHNOLOGY
·
2022
·Vol. 33
·期 24
·245601
·
IF 3.953
Guangming Xu,Xilong Shen,Lei Zhang,Jie Tang,Chuan He,Ziqiang Zhou,Tian Xu,Meifeng Xu,Yonglong Jin,Chaonan Wang
In this study, we developed a flexible and transparent silver/polystyrene/polydimethylsiloxane (Ag/PS/PDMS) substrate with both high density of hot spots and satisfactory uniformity using a cost-effective approach. Via template-guided self-assembly, PS beads were arranged regularly in nanobowls of a square array on PDMS, whose surface structure was transferred from a commercial complementary metal oxide semiconductor chip. Roughness was introduced onto the PS bead surface by nitrogen plasma treatment, followed by sputtering of Ag which generated many hot spots. Differential roughness on the PS bead surface greatly influenced the morphology of the Ag/PS/PDMS substrate. A meat-ball like surface structure was formed with a plasma etching time of 5 min, whose growth mechanism was proposed based on the scanning electron microscope analysis. The high sensitivity and desirable uniformity of the meat-ball like Ag/PS/PDMS substrate were demonstrated by using crystal violet as a Raman reporter, exhibiting an enhancement factor of 2.7 × 107 and a relative standard deviation of 5.04%. Thiram of a lower concentration than the maximum residue limit on the cucumber surface could easily be detected in situ by the proposed substrate, demonstrating its great potential for in-situ food safety analysis.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yan Bao,Jingxiang Chang,Yuanxia Zhang,Lu Chen
Superhydrophobic coating can be widely used in many fields because it is not easily wetted by water like lotus leaves. However, most of superhydrophobic coating is difficult to withstand abrasion attack. Herein, hollow SiO 2 /PAA-b-PS Janus microspheres were synthesized via emulsion interfacial synthesis method using amphiphilic block copolymer of polyacrylic acid block polystyrene (PAA-b-PS) and hollow NH 2 -SiO 2 microspheres as raw materials in this paper. Because the hemisphere grafting organic polymer chain was hydrophobic and the other hemisphere was hydrophilic and contained amino groups, hollow SiO 2 /PAA-b-PS Janus microspheres exhibited amphiphilic and asymmetrical nature, which was a typical inorganic/polymer Janus microspheres. Robust superhydrophobic coating was facilely achieved using hollow SiO 2 /PAA-b-PS Janus microspheres on polyurethane pretreated substrate like leather and fabric. Robust superhydrophobic coating after 90 sandpaper abrasion cycles still retained excellent superhydrophobicity. As expected, robust superhydrophobic coating had prominent self-cleaning property against different pollutants and was capable to separate a variety of oil–water mixtures with ultrahigh separation efficiency. The separation efficiency of robust superhydrophobic coating for oil–water mixture was maintained above 98% even after 40 separation cycles. In total, robust superhydrophobic coating constructed by hollow SiO 2 /PAA-b-PS Janus microspheres possesses distinguished superhydrophobicity, abrasion resistance, self-cleaning, oil–water separation capacity and universality, which shows a promising application in multifunctional coating.
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Journal of Environmental Sciences
·
2022
·
IF 6.796
Jie Xu,Yang Guo,Qian Yang,Xueling Bai,Runhua Lu,Menghui Liu,Zichen Kuang,Luo Zhang,Jing Li
Ultraviolet/persulfate (UV/PS) and Ultraviolet/hydrogen peroxide (UV/H 2 O 2 ) have attracted much attention in recent years as advanced oxidation processes for water treatment. However, it is not all clear how these two methods affect the formation of cyanogen chloride (CNCl) in the subsequent water chlorination process. In this study, it was found that both UV/H 2 O 2 and UV/PS pre-oxidation promoted the formation of CNCl in six actual water samples collected from urban rivers. Glycine, uric acid, arginine and histidine were investigated as the model compounds to explore the effects of different methods on the production of CNCl. The results showed that compared with chlorination alone, pre-oxidation by UV/H 2 O 2 and UV/PS can reduce the production of CNCl for glycine and uric acid by up to 95% during post-chlorination process. However, they can greatly promote the formation of CNCl for arginine and histidine by up to 120-fold. In a more detailed investigation, pre-oxidation of histidine formed highly reactive intermediates to chlorine, leading to increased CNCl formation and chlorine consumption. The results showed that the precursors of CNCl was altered after pre-oxidation, and need to be re-evaluated.
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高影响因子
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