CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Anhong Cai,Jing Deng,Mengyuan Xu,Tianxin Zhu,Shiqing Zhou,Jun Li,Guofang Wang,Xueyan Li
The combination of UV and monochloramine (UV/NH 2 Cl) was investigated to eliminate tetracycline (TC) in water. The results indicated that TC degradation by UV/NH 2 Cl oxidation far exceeded that by UV photolysis and dark chloramination and these processes well fitted pseudo-first-order kinetics. With the increase of NH 2 Cl dosage, the pseudo-first-order rate constant ( k obs ) value increased linearly during TC chloramination, while the growth rate of k obs presented a gradual downward trend in UV/NH 2 Cl process. TC degradation by UV photolysis, dark chloramination and UV/NH 2 Cl oxidation displayed highly pH-dependent. As solution pH increased from 5.0 to 9.0, the TC removal increased during UV photolysis, while decreased during dark chloramination. For UV/NH 2 Cl process, the TC degradation showed a decreasing trend with increasing pH from 5.0 to 7.0, but further increasing pH to 9.0 presented an increasing trend. Reactive chlorine species acted as the major contributors to TC degradation in pH range of 6.0–8.0. TC degradation was not apparently affected after the introduction of HA and chloride, but was substantially accelerated in the presence of HCO 3 − . The proposed degradation pathways involved the hydroxylation, demethylation, dehydration and chlorine substitution processes. Compared with dark chloramination, the N-Nitrosodimethylamine (NDMA) generation was enhanced during TC oxidation by UV/NH 2 Cl process. The NDMA concentration increased with increasing solution pH from 6.0 to 8.0 and also elevated in the presences of humic acid (HA), nitrite, nitrate and ammonium during TC oxidation by chloramination and UV/NH 2 Cl. The results of acute toxicity test demonstrated that the toxicity of the reacted solution exhibited similar trends during dark chloramination and UV/NH 2 Cl treatment and was found to be obviously higher than UV photolysis.
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高影响因子
Desalination and Water Treatment
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2016
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IF 1.272
Jie Cui,Xiaoliang Ma,Xiaogang Wu,Xu Zhang
The adsorption of 2,4,6-trichlorophenol (2,4,6-TCP) on synthesized magnetic mesoporous silica (Fe3O4/SiO2/m-SiO2, MMS) composites and the regeneration of its adsorption capacity through direct UV photolysis was performed in this work. MMS exhibited good performance in removing 2,4,6-TCP from aqueous solutions. The adsorption ratio of 2,4,6-TCP was determined to be influenced by aquatic pH, dissolved humic acids, ionic strength, temperature, and the loaded adsorbents. The adsorption isotherm fit the Freundlich and Polanyi–Manes model better than the Langmuir model, which indicated that the adsorption of 2,4,6-TCP was more likely a pore-filling process. The calculated adsorbed capacity for 2,4,6-TCP on MMS was 55 mg/g. Direct UV photolysis could decompose the adsorbed 2,4,6-TCP and later regenerate the adsorption capacity of MMS to a certain degree; however, the outer mesoporous silica layer was not UV-persistent, and large parts of the mesoporous silica layer were also shown to be corrupted from the Fe3O4/SiO2 core. Therefore, after long duration UV irradiation, the adsorption of 2,4,6-TCP on regenerated MMS was much lower than on freshly synthesized MMS. These results suggest that the photostability of magnetic core-shell-like nanocomposites should be investigated because parts of the composites might leach into the bulk phase during practical use and cause potential environmental risks, similar to other well-known nanomaterials.
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PROGRESS IN ORGANIC COATINGS
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2022
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IF 6.206
Yufeng Liang,Lipeng Wang,Yongping Bai,Haiyan Qian,Huifang Xu,Yu Wang
UV-cured releasing agent is a new type of anti-fouling coatings, which must meet needs of the development in the pressure-sensitive adhesive industry, but also in line with modern environmentally friendly demands. With a step-by-step method, a multi-functional photosensitive silicone modified polyurethane releasing agent was synthesized using a hydroxyalkylsiloxane, toluene diisocyanate, and pentaerythritol triacrylate, carrying out by UV initiating technique to prepare the releasing films. The infrared spectrum and the nuclear magnetic resonance spectrum were used to analyze a molecular structure of the releasing agent. Peel strength tests and morphological tests were used to characterize the application capabilities of the releasing films. X-ray photoelectron spectroscopy and other techniques were simulated the migration of the surface group of the releasing films during the pressure sensitive adhesive adherence. The results showed that the excessive soft segment silicone chain reduced crosslink density, thereby reducing the residual performance, while the excessive polar group density would simultaneously reduce the releasing performance and residual performance. This conclusion reveals the releasing mechanism of the UV-cured releasing agent, and provides an important guiding significance for the molecular design and product development of the new type of releasing agent.
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高影响因子
Ecological Frontiers
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2025
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IF 0
Xinyi Wu,Yan Li,Linghan Li,Hongwei Liu,Yongguang Yin,Shixiang Gao,Maoyong Song,Zhiqiang Tan,Yan Ma
Monitoring nanoplastic (NP) aggregation in bidisperse systems under environmentally relevant ionic conditions remains a significant challenge. Conventional techniques such as dynamic light scattering and transmission electron microscopy are hindered by matrix interference, low sensitivity, and difficulties in resolving polydispersity. Here, we addressed this gap by using a coupled system including hollow fiber flow field-flow fractionation (HF5), ultraviolet-visible detector (UV), and point-discharge optical emission spectroscopy (PD-OES) to investigate aggregation behavior of bidisperse polystyrene NPs (PSNPs, 50 nm and 100 nm) at ionic conditions below 1 mM, representative of freshwater ecosystems. We demonstrated that bidisperse PSNPs exhibit enhanced aggregation compared to monodisperse counterparts by using the HF5-UV/PD-OES platform for purification, separation, and carbon-specific quantification. This platform elucidated the critical roles of cation valence (Na + vs. Ca 2+ ) and low concentration ion gradients (0.01–1 mM) in modulating aggregation over extended scales (i.e., 24 h). Finally, toxicity assessments on Microcystis aeruginosa revealed that aggregation reduces PSNP ecotoxicity depending on cation valence, thereby alleviating growth inhibition, oxidative stress, and impairment of chlorophyll biosynthesis. These findings elucidate how environmentally relevant ionic conditions govern NP fate and effects in freshwater ecosystems, providing a critical link between physicochemical transformations and biological responses for ecological risk evaluation.
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International Journal of Environmental Research and Public Health
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2018
·Vol. 15
·期 9
·1907
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IF 2.145
Wen-Qian Wang,Hai-Xin Duan,Zhou-Tao Pei,Rou-Rou Xu,Ze-Tian Qin,Guang-Can Zhu,Li-Wei Sun
Ultraviolet absorbing chemicals (UV filters) are widely used in personal care products for protecting human skin and hair from damage by UV radiation. Although these substances are released into the environment during production and consumption processes, little is known about their genotoxicity effects. Our previous studies have shown that benzophenone-type UV filters exhibited acute toxicity on three species of aquatic organisms. Mutagenesis by benzophenone (BP) and benzophenone-1(BP-1) was tested in the present study by theSalmonella typhimurium/reverse mutation assay (Ames assay). All the positive reverse mutations occurred in the absence of the S9 liver extract system for both chemicals. From BP, positive mutation effects on the TA102 strain at doses of 0.05 μg/plate and 0.5 μg/plate were detected. From BP-1, positive mutation effects on the TA97 strain at doses of 0.05 μg/plate and 0.5 μg/plate, and on the TA100 strain at a dose of 0.5 μg/plate, were detected. A mixture of BP and BP-1 exhibited mutagenicity on the TA97 and TA100 strains. For the TA97 strain, the positive mutation results were detected at 10% and 50% of the mixture. For the TA100 strain, the results were detected when the mixture was at 5% and 10%. In the mixture at 5%, the concentrations of BP and BP-1 were 3.5 μg/plate and 14 μg/plate, respectively. In the 10% mixture, the doses of BP and BP-1 were 7 μg/plate and 28 μg/plate, respectively. In the 50% mixture, the doses of BP and BP-1 were 35 μg/plate and 140 μg/plate, respectively. The mixture test results suggested that there was antagonism in mutagenicity between BP and BP-1.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Songbin Wang,Xinlei Gao,Longfei Weng,Chunqing Huo,Xueyu Du,Xueqiong Yin
As one of the five major engineering plastics, polycarbonate (PC) has been applied in many industrial fields. However, its poor wear- and UV- resistance greatly limit its further promotion. Inspired by the dual benefits of inorganic–organic hybrid filler, in this study, we developed a novel type of catechol group- and nano silica-containing reinforcing filler (CFNS) for the preparation of wear- and UV-resistant PC-based composite films. With a low level of filler content (1%), the coefficient of friction (COF) was distinctly reduced from 0.14 (neat PC film) to 0.06 (composite film), benefiting from a wear-resistant surface layer. On the basis of ensuring high and stable transmittance for visible light, the composite films also exhibit strengthened capacity of UV shielding for the waveband from 293 to 400 nm. In addition, the general performance of composite films including tensile strength, tensile modulus, and thermal stability have also been improved in different degrees. Therefore, the composite films reinforced by CFNS are highly promising for a wide range of applications, ascribed to their improved general properties as well as two additional functions of wear- and UV-resistance.
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高影响因子
ENVIRONMENTAL POLLUTION
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2024
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IF 7.6
Haiyan Wang,Sunxinyi Wang,Zixuan Jia,Hao Li,Jiayu Wang,Teng Zhang,Jiayue Dong,Peizeng Yang,Jing Chen,Yuefei Ji,Junhe Lu
Isoproturon (IPU), a widely utilized phenylurea herbicide, is recognized as an emerging contaminant . Previous studies have predominantly attributed the degradation of IPU in natural waters to indirect photolysis by natural organic matter (NOM). Here, we demonstrate that nitrite (NO 2 − ) also serves as an important photosensitizer that induces the photo-degradation of IPU. Through radical quenching tests, we identify hydroxyl radicals (•OH) and nitrogen dioxide radicals (NO 2 • ) originating from NO 2 − photolysis as key players in IPU degradation, resulting in the generation of a series of hydroxylated and nitrated byproducts. Moreover, we demonstrate a synergistic effect on the photo-transformation of IPU when both NOM and NO 2 − are present in the reaction mixture. The observed rate constant ( k obs ) for IPU removal increases to 0.0179 ± 0.0002 min −1 in the co-presence of NO 2 − (50 μM) and NOM (2.5 mg C /L), surpassing the sum of those in the presence of each alone (0.0135 ± 0.0004 min −1 ). NOM exhibits multifaceted roles in the indirect photolysis of IPU. It can be excited by UV and transformed to excited triplet states ( 3 NOM*) which oxidize IPU to IPU •+ that undergoes further degradation. Simultaneously, NOM can mitigate the reaction by reducing the IPU •+ intermediate back to the parent IPU. However, the presence of NO 2 − alters this dynamic, as IPU •+ rapidly couples with NO 2 • , accelerating IPU degradation and augmenting the formation of mono-nitrated IPU. These findings provide in-depth understandings on the photochemical transformation of environmental contaminants , especially phenylurea herbicides, in natural waters where NOM and NO 2 − coexist.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Qianzhen Zhang,Ran An,Abudukadi Tudi,Jiongquan Chen,Xiaoqin Ma,Xifa Long,Zhihua Yang,Shilie Pan,Yun Yang
Developing new short-wavelength nonlinear optical (NLO) crystals has always been a significant and challenging area of research. Herein, guided by the cooperative optimization strategy, three new rare-earth metal borate fluorides, K 2 GdB 3 O 6 F 2 , Rb 2 LuB 3 O 6 F 2 , and Cs 2 LuB 3 O 6 F 2 , are rationally designed and fabricated by synergically assembling advantageous functional groups. Among them, a structural evolution from centrosymmetric K 2 GdB 3 O 6 F 2 to non-centrosymmetric Rb 2 LuB 3 O 6 F 2 and Cs 2 LuB 3 O 6 F 2 reveals that the [B 3 O 6 ] group contributes to the control of structural symmetry, owing to its sensitivity to the coordination of rare earth metal polyhedra. Notably, all the three title compounds exhibit short cutoff edges less than 200 nm, with Cs 2 LuB 3 O 6 F 2 displaying a large experimental frequency doubling effect of 1.5 × KH 2 PO 4 . The type-I shortest phase-matching wavelengths for Rb 2 LuB 3 O 6 F 2 and Cs 2 LuB 3 O 6 F 2 are evaluated to be 210 and 202 nm, respectively, indicating their potential for direct output of 213 coherent lights through a fifth harmonic generation process of Nd: YAG laser. This study provides new insights into the rational design and development of short-wavelength NLO materials by exploring the sensitivity of the [B 3 O 6 ] groups to the surrounding coordination environment, thereby fostering innovation in the field of NLO materials.
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高影响因子
Chemical Engineering Journal Advances
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2025
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IF 7.1
Tianhong Wang,Jiahui Xu,Anhong Cai,Jibo Xiao,Peng Wang,Min Zhao,Xianfeng Huang
Organic phosphonates detected frequently in water bodies pose severely environmental risks, and the cleavage of their C-P bonds to converse orthophosphate (PO 4 3- ) serves as a prerequisite step for achieving deep phosphorus elimination. Although the in situ generation of Cu(III) via Cu(II)/oxidant system for selective phosphonates degradation has been studied, the oxidation efficiency is constrained by sluggish Cu(II)/Cu(I) reduction, especially under acidic conditions. In this study, the introduction of UV irradiation accelerated the Cu(I)/Cu(II)/Cu(III) cycle in Cu(II)/peroxymonosulfate (PMS) process, enabling efficient and selective oxidation of 1,1-diphosphonic acid (HEDP, a typical phosphonate) into PO 4 3- across a wide pH range. UV-driven trace Cu(II)/PMS system can convert 90% of HEDP into PO 4 3- within 10 min at the pH range of 4-10, which was significantly higher than the conversion efficiency of HEDP by UV/PMS, Cu(II)/PMS and UV/Cu(II)/H 2 O 2 processes. The decomposition of HEDP was enhanced with increasing Cu(II) and PMS concentrations. Notably, mechanistic investigation revealed that Cu(III)-induced intramolecular electron transfer was the key contributor during the UV/Cu(II)/PMS-driven decomposition of HEDP into PO 4 3- . The experimental results of competitive ligands clearly suggested that the high selectivity of HEDP oxidation by UV/Cu(II)/PMS was closely related to the complexation of Cu(II) with HEDP. Additionally, although natural organic matter and inorganic anions to some extent affected HEDP degradation, UV-driven trace Cu(II)/PMS system still exhibited satisfactory results in treating HEDP in actual wastewater. This study proposes a strategy for efficient phosphonate removal under varying pH conditions, which provides new insights for practical wastewater treatment applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xianrui Tong,Weijie Zhu,Zichen Qin,Yan Li,Pengyao Guo,Jiapeng Lu,Dongxiao Sun,Zhiqiang Dong,Lei Ding,Jiangya Ma
This study proposed a UV-initiated strategy for the synthesis of magnetic ion exchange resins. Two novel magnetic resins were successfully prepared by suspension polymerization method using 1-iodohexane as a long carbon chain alkylating agent under low-pressure ultraviolet (UV) initiation conditions. The polymerization reaction time of resin was significantly reduced to 2 h due to the UV initiation. MGD resin properties exhibited high synthetic stability and good reproducibility. The prepared resin particles possessed rich micropores and mesopores structure with a particle size of 50–250 um. The long carbon chain alkylating agent (1-iodohexane) could improve increasingly the adsorption capacity for phosphate (69.65 %) compared with the short carbon chain alkylating agent (dichloroethane). Site energy analysis found that the concentrated distribution of high-energy sites and surface homogeneity of resins contributed to their high adsorption capacity. DFT calculations, characterizations of resins before and after adsorption, and stoichiometric experiments revealed the electrostatic attraction and ion exchange dominated the removal mechanisms of phosphate adsorbed on prepared resins. DFT results indicated longer chain lengths enhanced both the non-electrostatic and electrostatic components of the adsorption energies. Therefore, compared to thermal initiation, low-pressure UV initiation offered advantages such as high efficiency, rapidity, low-carbon and environmental friendliness for the preparation strategy of a new generation of high-performance magnetic resin.
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高影响因子
ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Yang Wang,Jing Su,Ting Li,Piming Ma,Huiyu Bai,Yi Xie,Mingqing Chen,Weifu Dong
Ultraviolet (UV) light is known to be harmful to human health and cause organic materials to undergo photodegradation. In this Research Article, bioinspired dopamine–melanin solid nanoparticles (Dpa-s NPs) and hollow nanoparticles (Dpa-h NPs) as UV-absorbers were introduced to enhance the UV-shielding performance of polymer. First, Dpa-s NPs were synthesized through autoxidation of dopamine in alkaline aqueous solution. Dpa-h NPs were prepared by the spontaneous oxidative polymerization of dopamine solution onto polystyrene (PS) nanospheres template, followed by removal of the template. Poly(vinyl alcohol) (PVA)/Dpa nanocomposite films were subsequently fabricated by a simple casting solvent. UV irradiation protocols were set up, allowing selective study of the extra-shielding effects of Dpa-s versus Dpa-h NPs. In contrast to PVA/Dpa-s films, PVA/Dpa-h films exhibit stronger UV-shielding capabilities and can almost block the complete UV region (200–400 nm). The excellent UV-shielding performance of the PVA/Dpa-h films mainly arises from multiple absorption because of the hollow structure and large specific area of Dpa-h NPs. Moreover, the wall thickness of Dpa-h NPs can be simply controlled from 28 to 8 nm, depending on the ratio between PS and dopamine. The resulting films with Dpa-h NPs (wall thickness = ∼8 nm) maintained relatively high transparency to visible light because of the thinner wall thickness. The results indicate that the prepared Dpa-h NPs can be used as a novel UV absorber for next-generation transparent UV-shielding materials.
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高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2020
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IF 1.349
Guangfeng Wu,Hu Zang,Huixuan Zhang
In this study, a series of UV-curable waterborne polyurethane (UV-WPU) emulsions with different contents of dipentaerythritol hexaacrylate (DPHA)/dipropylene glycol diacrylate (DPGDA) were prepared using isophorone diisocyanate, and poly(tetramethylene glycol) as the main materials. Besides, DPHA/DPGDA with a mass ratio of 1:1 was used as the reactive diluent and UV curing agent, and pentaerythritol triacrylate was used as the capping agent. The UV-WPU films were obtained by using photo-initiator 184 and an ultraviolet curing machine. The molecular structure was characterized by infrared spectroscopy, and several properties such as particle size, contact angle, tensile properties were measured, thermogravimetric analysis was conducted. Results revealed that a more compact network structure is formed by the introduction of DPHA/DPGDA, with a higher reactivity, into the polyurethane molecule under UV irradiation; tensile strength increases to 21.03 MPa; and several performance parameters improve, with a DPHA/DPGDA content of 40 wt%. However, some phase separation was observed, at a DPHA/DPGDA content of greater than 40 wt%.
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高影响因子
危险品化学品经营许可证（带存储）