Environmental Science and Ecotechnology
·
2024
·
IF 14
Yinjie Zhu,Jian Ding,Xiaoxiong Wang,Xuejian Wang,Huansheng Cao,Fei Teng,Shishi Yao,Zhiru Lin,Yuelu Jiang,Yi Tao
Harmful cyanobacterial blooms (HCBs) pose a global ecological threat. Ultraviolet C (UVC) irradiation at 254 nm is a promising method for controlling cyanobacterial proliferation, but the growth suppression is temporary. Resuscitation remains a challenge with UVC application, necessitating alternative strategies for lethal effects. Here, we show synergistic inhibition of Microcystis aeruginosa using ultraviolet A (UVA) pre-irradiation before UVC. We find that low-dosage UVA pre-irradiation (1.5 J cm −2 ) combined with UVC (0.085 J cm −2 ) reduces 85% more cell densities compared to UVC alone (0.085 J cm −2 ) and triggers mazEF -mediated regulated cell death (RCD), which led to cell lysis, while high-dosage UVA pre-irradiations (7.5 and 14.7 J cm −2 ) increase cell densities by 75–155%. Our oxygen evolution tests and transcriptomic analysis indicate that UVA pre-irradiation damages photosystem I (PSI) and, when combined with UVC-induced PSII damage, synergistically inhibits photosynthesis. However, higher UVA dosages activate the SOS response, facilitating the repair of UVC-induced DNA damage. This study highlights the impact of UVA pre-irradiation on UVC suppression of cyanobacteria and proposes a practical strategy for improved HCBs control.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2022
·Vol. 86
·期 11
·2963-2973
·
IF 2.43
Li Ting,Zuo XiaoJun,Zhang SongHu,Kong QingGang
Recently, increasing attention has been paid to antibiotic resistance in stormwater runoff. However, there is no available literature about the control of antibiotic resistant bacteria (ARB) through 365 nm ultraviolet light-emitting diode (UVA/LED). In this study, batch experiments were conducted to investigate ARB inactivation kinetics, effects of light intensity and water matrix (including suspended solid (SS) concentration, initial pH and bacteria concentration), and potential transmission risks after UVA/LED irradiation. Results showed that ARB inactivation efficiencies reached 6.31 log reduction at 8 mW/cm 2 (86 J/cm 2 ) of UVA/LED for 180 min. ARB inactivation efficiencies increased with the increase of light intensity, and showed a linear relationship. ARB inactivation decreased with increasing SS levels, and the largest inactivation efficiencies was 3.56 log reduction at 50 mg/L of SS. Initial pH had slight effect on ARB inactivation through UVA/LED irradiation. A low initial bacteria concentration (10 5 CFU/mL) was not necessarily associated with good ARB inactivation (3.59 log reduction). After UVA/LED irradiation, ARB was hardly detected during 12 hr of dark repair, and the transfer frequency of kanamycin resistance gene was increased to 5.43 × 10 −4 . These suggested that the application of UVA/LED to inactivate ARB in stormwater runoff was feasible and desirable in this study. ARB inactivation reached 6.31 log reduction at 8 mW/cm 2 of UVA/LED for 180 min. UVA/LED inactivation kinetics could be well described by the first-order model. Initial pH and bacteria levels had weak effects for ARB inactivation. Potential risks of ARB could be blocked after 60 min of UVA/LED disinfection.
研究领域:
环境科学
·
微生物学
·
公共卫生
·
水利工程
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Ying Wu,Yong Qian,Aicheng Zhang,Hongming Lou,Dongjie Yang,Xueqing Qiu
To solve the poor absorbance on ultraviolet A (UVA) radiations and dark color, alkali lignin (AL) was modified via atom transfer radical polymerization (ATRP) grafting of 2-4-benzoyl-3-hydroxyphenyl acrylate (BHA). The color of AL was whitened 86% and the UVA/UVB absorbance ratio of AL-g-BHA improved to 1.2, while the reported highest value was 0.9. The excellent UV-blocking performance of AL-g-BHA was demonstrated in sunscreen. Sun protection factor (SPF) value of the sunscreen containing 10 wt % of optimal AL-g-BHA reached 59. Nanoscale AL-g-BHA normal and reverse micelles (LBNM and LBRM) were fabricated to investigate the effect of microstructure on the sunscreen performance. When BHA chains were packed inside, the SPF value of sunscreen containing 10 wt % of LBNM decreased to 28. In contrast, the SPF value of sunscreen containing 10 wt % of LBRM with BHA chains distributing on the surface was up to 244. Both AL-g-BHA and corresponding micelles exhibited good biocompatibility.
研究领域:
材料科学
·
生物学
·
化学工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Zhuangzhuang Niu,Pengqi Zhu,Gang Li,Caifang Gao,Yuqin Liu,Xiaoli Liu,Jinghua Sun,Ruiping Zhang
Excessive ultraviolet (UV) radiation can cause human skin erythema, tanning, inflammation and other adverse reactions. Human skin can spontaneously synthesize endogenous melanin under UV radiation to defend the damage of UV, but the skin problems such as light damage and light aging cannot be avoided due to its low UV shielding efficiency. Therefore, we design a natural and biocompatible PGDA (PDA-L doped sunscreen hydrogel) sunscreen hydrogel by crosslinking melanin-like L-lysine doped polydopamine (PDA-L) and amino acid biopolymer poly-γ-glutamic acid, which displays good biosafety, efficient UVA shielding performance and excellent anti-inflammatory performance in the application of the skin protection of sun and repair after sunburn. The introduction of PDA-L to the hydrogel can improve the absorption intensity in the UV region and antioxidative performance of the hydrogel. Meanwhile, the usage of biocompatible PGDA sunscreen hydrogel can avoid the skin oxidative damage and penetrative toxicity of the conventional sunscreen.
研究领域:
材料科学
·
生物医学工程
·
皮肤病学
·
药学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tao Yang,Xiujuan Kong,Ge Zeng,Maoju Jiang,Linqian An,Peng Su,Qixiao Lv,Jun Ma,Juan Li
Bromine (HOBr and OBr - ) can be rapidly formed in chlorine-involved processes in the presence of bromide (Br - ), and it significantly affects chlorine chemistry. The activation of chlorine by ultraviolet light A via light emitting diode (UVA-LED) is promising for disinfection and removal of organic contaminants in water treatment, while the bromine behavior therein remains unclear. In this study, the activation of bromine by UVA-LED (UVA-LED/bromine) was investigated to understand the bromine chemistry by selecting ibuprofen (IBP) and benzoic acid (BA) as the representatives. Bromine was readily decomposed into Br - and bromate by UVA photolysis with Br - being the major product. The apparent quantum yield of HOBr (0.589 ± 0.017 mol Einstein −1 ) and OBr - (0.0190 ± 0.0015 mol Einstein −1 ) kept stable at bromine concentrations of 20 – 200 μM, while it decreased as pH increased from 6.0 to 10.0. IBP and BA were rapidly degraded by the UVA-LED/bromine process under different conditions, and it could be well simulated by a kinetic model. Reactive bromine species (RBS, mainly Br• and Br 2 •- ) instead of hydroxyl radical (•OH) contributed predominantly therein. The efficiency of the UVA-LED/bromine process decreased in real waters, mainly due to negative effects of background constituents such as chloride, bicarbonate, and humic acid, as evidenced by both experiments and kinetic modeling. Brominated disinfection byproducts (DBPs) were generated during IBP and BA degradation, while their concentrations were within the regulation limit of drinking water. The results advance the bromine chemistry, and shed light on the UVA-LED photolyzed chlorine process in the presence of Br - .
研究领域:
环境科学
·
水处理工程
·
化学动力学
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产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2017
·Vol. 72
·期 2
·359-368
·
IF 1.258
Xia Bin,Yao Juan-juan,Han Chen-xi,Zhang Zhi,Chen Xiang-yu,Fang Yan-juan
The degradation of ofloxacin (OFX) at low concentration in aqueous solution by UVA-LED/TiO 2 nanotube arrays photocatalytic fuel cells (UVA-LED/TiO 2 NTs PFCs) was investigated. TiO 2 nanotube arrays (TiO 2 NTs) photoanode prepared by anodization-constituted anatase–rutile bicrystalline framework. The results indicated that the degradation efficiency of OFX by UVA-LED/TiO 2 NTs PFC was significantly enhanced by 14.3% compared with UVA-LED/TiO 2 NTs photocatalysis. The pH affected the degradation efficiency markedly; the highest degradation efficiency (95.0%) and the pseudo-first-order reaction rate constant k value (0.049 min −1 ) were achieved in neutral condition (pH 7.0). The degradation efficiency increased with the increasing concentration of dissolved oxygen (DO) in the UVA-LED/TiO 2 NTs PFC. The main reactive species of OFX degradation are positive holes (h + ) and superoxide ion radicals (O
·− 2
) in a DO sufficient condition. Furthermore, the possible pathways of OFX degradation were proposed.
研究领域:
环境科学
·
化学工程
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hejiao Zhang,Shuang Liu,Wei Ding,Chao Liu,Yaoyao Huang,Hong Li,Huaili Zheng
Advanced oxidation processes (AOPs) based on sulfite (S(IV)) activation are gaining recognition as a promising Fenton-like strategy, primarily due to their ability to generate potent radicals (e.g., SO 4 − and HO ). However, the existence and role of a non-radical-driven oxidation pathway in the S(IV)-mediated degradation of contaminants remain under debate. Herein, a magnetic iron-carbon composite (FeO x @C) was fabricated using the MOF-templated method and utilized as a stable photocatalyst to activate S(IV) under UVA light, achieving >93.6 % degradation of 20 μM ofloxacin (OFL) with a high degradation rate constant of 0.073 min −1 within 45 min. The catalyst’s porous carbon structure facilitated the transport of substrates to active sites and shortened the diffusion distance between reactive species and contaminants. Adsorbed S(IV) donated one electron to photo-generated holes and exposed Fe(III) sites with the formation of SO 5 − , which then followed two distinct pathways to produce radicals (SO 4 − ) and non-radicals (Fe(IV) and 1 O 2 ) responsible for OFL degradation. By leveraging the synergy of both radicals and non-radicals, this innovative oxidative system showcased robust anti-interference capacities and exceptional performance in degrading contaminants from complex water matrices. This study provides new insights into the significant role of non-radical species in S(IV)-mediated decontamination processes.
研究领域:
环境科学
·
催化化学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2020
·
IF 3.465
Wanhe Qi,Songming Zhu,Abubakar Shitu,Zhangying Ye,Dezhao Liu
Under Minamata Convention restrictions, mercury-free UV source was in need for ultraviolet disinfection in recirculating aquaculture systems (RAS). Ultraviolet emitting diodes (UV-LEDs) seemed a potential mercury-free UV source and had gained increasing attention in water disinfection. In this study, a mercury-free UVA-LED and low concentration peroxymonosulfate (PMS) combination was proposed for E. coli (CGMCC 1.3373) inactivation and real RAS wastewater disinfection. Results showed that UVA-LED and low concentration PMS combination enhanced E. coli inactivation over UVA-LED alone. A synergistic effect on E. coli inactivation with synergy factor of 58.7 % was found when combining UVA-LED irradiation with 1 mg/L PMS. Kinetic rate constant increased by up to 139 % by UVA-LED and 1 mg/L PMS combination, which implied the required UV fluence to 2-log E. coli inactivation was saved up to 42 %. Also, UVA-LED and 1 mg/L PMS combination showed disinfection potential for real RAS wastewater treatment. Mechanism study revealed that the Cl − , · OH and SO 4 ·- played important roles and · OH was dominant radical in saline solution by UVA-LED/PMS process compared to that in phosphate buffered solution(PBS). The E. coli inactivation was caused by UVA-LED irradiation and reactive species generated in UVA-LED/PMS system. Our study provided a potential strategy to introduce the mercury-free UV-LED into RAS and a better understanding of UVA-LED/PMS disinfection process.
研究领域:
环境科学
·
水处理
·
水产养殖
·
微生物学
✓ 已验证
DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2024
·
IF 2.6
Yu Li,Miao Guo,Li Li,Fan Yang,Lidan Xiong
Photoaging, caused by ultraviolet (UV) radiation, is characterized by the senescence of skin cells and reduction of collagens. Although rice fermentation is widely used in the cosmetics, its impact on skin photoaging is still not well understood. Herein, we investigated the possible effectiveness of Maifuyin, a fermented rice product, and its components, succinic acid (SA), and choline, for safeguarding UVA-exposed human dermal fibroblasts (HDFs) against photoaging. In this study, the effects of Maifuyin, SA, and choline on UVA-induced cell death and senescence in fibroblasts were evaluated in cell counting kit-8 (CCK-8), expression of β-galactosidase (β-GAL), and matrix metalloproteinases (MMP)-1. To identify oxidative stress, the investigation focused on reactive oxygen species, glutathione, superoxide dismutase, and malondialdehyde. Additionally, a mRNA sequencing technology (RNA-seq) was applied to study the underlying mechanisms of these components on UVA-induced photoaging. Meanwhile, the level of C–X–C motif chemokine ligand 2 (CXCL2) in the cell supernatant was confirmed to assess the autocrine chemokine level. To reassess the involvement of CXCL2, the expression of β-GAL was evaluated in fibroblasts treated with or without CXCL2. The results indicated that 1 mg/mL Maifuyin and SA inhibited UVA-induced senescence in fibroblasts, MMP-1 expression, and oxidative damage. The RNA-seq revealed 1 mg/mL Maifuyin and SA might be recruited chemokine CXCLs to inhibit MMPs production and fibroblast senescence via TNFα, MAPK, and NF-κB pathways. ELISA results showed a significant reduction of autocrine CXCL2 in UVA-irradiated HDFs by pretreating Maifuyin and SA. The β-GAL staining assay revealed that CXCL2 treatment increased β-GAL activity, while the administration of Maifuyin and SA counteracted this effect in HDFs. These results highlighted the potential use of Maifuyin and SA as promising candidates for anti-photoaging applications.
研究领域:
美容学
·
细胞生物学
·
药理学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Qing Li,Run Lu,Huiyu Jiang,Yuyang Zhou
Establishing an energy/water-saving bleaching process is highly expected by textile plants to reduce industrial carbon emission, wastewater discharge and general cost. Therefore, an efficient UVA-assisted N-[4-(triethylammoniomethyl)-benzoyl]- caprolactam-chloride (TBCC) -activated hydrogen peroxide (H 2 O 2 ) bleaching strategy at ambient temperature for cotton/spandex (C/S) fabric was developed in this study. Results reveal that 7.4 g/L of TBCC-activated H 2 O 2 (30%) achieves a slightly higher whiteness index (WI) on C/S fabrics than those only treated with 60 g/L H 2 O 2 (30%). The treated C/S fabric displays a good dyeability using direct dyes due to the qualified wettability. The mild pH process protects C/S fabrics from damage with a low tensile loss (less than 10%) in warp and weft directions. The WI of C/S fabric mainly depends on the concentration of TBCC/H 2 O 2 couple and radiation time. Moreover, the degradation mechanism of cotton pigment in UVA/TBCC/H 2 O 2 bleaching system was implemented including the identification of effective reactive oxygen species (ROS), tracking of the concentration variation of hydroxyl radical (HO•) under UVA irradiation, and the exploration of degrading kinetics and pathway of morin as the model of pigment impurity. Indicated by the degradation rate constant, both TBCC and UVA plays an accelerating role in enhancing the degradation efficiency. In the radical scavenging experiment, HO• and superoxide radical (O 2 – •) are two major ROS participating in the degradation. And therein, HO• makes larger contribution than O 2 – •. HO• concentration has a high positive correlation with radiation duration and TBCC dosage based on the fluorescence labelling method. Confirmed by LC-MS/MS analyses, 2,4,6-trihydroxybenzoic acid (MW: 170.12) and 2,4,-dihydroxybenzoic acid (MW: 154.12) are two major segments degraded from the oxidation and ring-opening of C-ring in morin. Finally, considering energy, water and chemical conservations, the condition i.e. 7.4 g/L of H 2 O 2 (30%) and 20 g/L of TBCC under 30 W UVA radiation for 1 h, is recommended, which significantly increases the WI by 46.5%, and saves about 90% energy and 50% water consumption compared with the conventional waterbath bleaching at 95 °C for 45 min when similar WI enhancement was achieved.
研究领域:
纺织科学与工程
·
环境科学
·
化学工程
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·Vol. 37
·期 43
·e07832
·
IF 26.8
Tianhao Chen,Zhefeng Liu,Sha. Sha,Rui Wang,Siwei Chen,Yalan Sun,Hancong Zheng,Aihua Chen
Solar ultraviolet (UV) radiation, a primary cause of skin cancer and erythema, poses irreversible risks to human health, underscoring the urgent need for advanced solar UV detector. Herein, we present a novel intrinsically flexible UVA detector featuring real-time monitoring, high performance and recyclability. This breakthrough is achieved through engineered oriented composite fabrics combining main-chain azobenzene-thermoplastic polyurethane elastomers (Az-TPU) with piezoelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanogenerators. The molecular architecture employs azobenzene groups and 4,4′-methylene diphenyl diisocyanate (MDI) as hard segment, while polytetramethylene ether glycol (PTMG) forms the soft segment. The physical cross-linking network and homogeneous microphase-separated structure enables the fabrics to generate substantial internal stress, resulting in superior photoelectrical conversion capabilities. The device we report achieves an 80 ms response time and maintains excellent linear correlation (R 2 = 0.997) across a broad light intensity range (0.05–50 mW·cm −2 ). Remarkably, the fabric achieves dynamic UV light monitoring when subjected to a tensile strain of 10%. Integrated with Bluetooth communication, the device enables real-time data transmission to mobile devices for continuous UVA intensity and dose monitoring throughout daily sunlight exposure. With demonstrated capability for solar UVA measurement, this technology presents significant industrial potential for wearable solar UV monitoring systems.
研究领域:
材料科学
·
可穿戴电子学
·
光电探测器
·
环境监测
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Yijie Lou,Chunyan Dai,Shuting Feng,Rijuan Jin,Shuangshuang Liu,Zhanyi Zhou,Minjun Wang,Yang Yang,Guoqiao Xu,Jue Hou,Jiayi Chen,Guping Tang,Nan Wang,Hongzhen Bai,Zhe Chen
Wound healing remains a significant global health challenge, affecting millions annually and imposing substantial economic burdens. Most commercially available biomaterials for wound management primarily address external symptoms, including hemostasis, exudation, scarring, and infection. Advanced biomaterials derived from endogenous molecules aim to better replicate the native wound microenvironment, promoting enhanced repair. Since wounds frequently occur on exposed skin, which is vulnerable to UVA radiation and requires protective yet invisible materials, traditional wound care products often lack these essential features. Inspired by natural UV protection mechanisms, a novel bioscaffold is developed using recombinant human collagen XVII (rhCOL17) crosslinked with porphyra-334 (P334) to improve wound healing under UVA exposure. The resulting rhCOL17-P334 conjugate integrates extracellular matrix (ECM)-like cues with UVA-shielding properties provided by P334. This conjugate is used to construct a transparent, injectable hydrogel combining gelatin methacryloyl (GelMA) and rhCOL17-P334 (GCP). GCP significantly inhibits UVA-induced fibroblast senescence and improves wound healing outcomes by targeting integrin α6β4 through rhCOL17. Its transparency facilitates convenient wound monitoring while also addressing the aesthetic requirement for invisibility. By combining UVA shielding with wound repair capabilities, GCP presents a promising platform for advanced wound management.
研究领域:
生物材料学
·
再生医学
·
皮肤科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）