JOURNAL OF HAZARDOUS MATERIALS
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2018
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IF 6.434
Sanping Zhao,Hailing Xi,Yanjun Zuo,Shitong Han,Yongbing Zhu,Zhanguo Li,Ling Yuan,Zhicheng Wang,Changcai Liu
The activation process of the B(OH) 3 -activated H 2 O 2 solution and its performance toward toxic industrial chemicals (TICs) and chemical warfare agents (CWAs) were investigated to find an efficient way to destroy TICs and CWAs. 11 B NMR analysis proved that B(OH) 3 reacted rapidly with basic H 2 O 2 to produce peroxoborates ([B(OH) (4− x ) (OOH) x ] − ), and the proportional contents were closely related to the pH and temperature. 1 O 2 and ·O 2 − were generated, and their production increased exponentially with pH. TICs thioanisole and paraoxon were used as simulants of CWAs to investigate the decontamination performance and nucleophilic/oxidizing reactivity of the B(OH) 3 -activated H 2 O 2 . Batch experiments proved that peroxoborates acted as the oxidants for the primary oxidation of the sulfide at a pH range of 8–12 and that ·O 2 − was responsible for the further oxidation of sulfoxide. Paraoxon degraded through OOH − -mediated S N 2 displacement with high stereo-selectivity, and the degradation rate increased exponentially with pH. Mustard gas, soman, and VX degraded effectively into nontoxic products in the B(OH) 3 -activated H 2 O 2 solution. A pH of 9–11 was recommended as the suitable acidity for developing the B(OH) 3 -activated H 2 O 2 solution to be a candidate for nucleophilic/oxidizing decontaminant, with advantages in rapid activation and low loss rate of reactive oxygen species .
研究领域:
环境科学
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化学工程
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Shubin Cheng,Qian Lei,Coner Deng,Weixin Lei,Honglin Chen
A green protocol for refining industrial chemicals containing formaldehyde (FA) impurities is presented here for the first time. FA, as an unreactant or a byproduct, causes separation problems in many industrial processes. It can be removed to a level of less than 1 ppm with easily separable methanol formation using commercial Cu/ZnO/Al 2 O 3 catalyst at atmospheric pressure in the absence of external hydrogen. The formation of methanol is achieved by the transfer of hydrogen species generated with the assistance of water to free FA, affording high methanol selectivity (62 %). By investigating potential intermediates and implementing deuterium labeling experiments, together with carbon and hydrogen balance calculations, a plausible pathway of water-assisted FA removal is proposed. Moreover, the in situ generated hydrogen species can be transferred directly into unsaturated compounds for selective reduction.
研究领域:
化学工程
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催化
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环境化学
✓ 已验证
产品关联
DOI
高影响因子
Bioactive Materials
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2022
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IF 16.874
Yi Xiao,Haomin Yi,Jingzhi Zhu,Suhua Chen,Guofang Wang,Yilong Liao,Yuanyuan Lei,Liyin Chen,Xingcai Zhang,Fangfu Ye
Toxicity assessment is a major problem in pharmaceutical candidates and industry chemicals development. However, due to the lack of practical analytical methods for DNA adduct analysis, the safety evaluation of drug and industry chemicals was severely limited. Here, we develop a DNAzyme-based method to detect DNA adduct damage for toxicity assessment of drugs and chemicals. Among 18 structural variants of G4 DNAzyme, EA2 DNAzyme exhibits an obvious DNA damaging effect of styrene oxide (SO) due to its unstable structure. The covalent binding of SO to DNAzyme disrupts the Hoogsteen hydrogen bonding sites of G-plane guanines and affects the formation of the G4 quadruplex. DNA damage chemicals reduce the peroxidase activity of the G4 DNAzyme to monitor the DNA adduct damage by disrupting the structural integrity of the G4 DNAzyme. Our method for genotoxic assessment of pharmaceutical candidates and industrial chemicals can elucidate the complex chemical pathways leading to toxicity, predict toxic effects of chemicals, and evaluate possible risks to human health.
研究领域:
分子生物学
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毒理学
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药学
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化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Zhijiang Sun,Yumeng Wang,MeiMei Yu,Yuan Li,Dahui Wang,Zehua Yin,Fen Ran
Wastewater contaminants can be effectively removed using membrane separation technology, and polyacrylonitrile, a polymer with strong thermal and chemical durability, has been employed extensively in developing water treatment membranes. Typically, bare polymer membranes face numerous challenges, including low permeate flux and poor separation capacity, so researchers have used modification maneuvers such as adding polymers and inorganic and other modified materials as additives to overcome these challenges. However, the cost issues of membrane development, reproducibility, and whether they have the potential for large-scale industrial production are often overlooked. This study uses polyacrylonitrile as the polymer matrix, polyvinylpyrrolidone as the modifier, and 1-methyl-2-pyrrolidone as the solvent to prepare hybrid ultrafiltration membranes utilizing the impregnation-submerged phase transition method. A polymeric membrane with high permeate flux (pure water permeate flux up to 693.7 L m −2 h −1 ) and good separation ability (BSA retention up to 89.6%) can be made by altering the casting solution's polymer matrix and modifier ratio. The membrane made by scraping and coating it with this cast membrane solution using an automatic coating machine also maintains good reproducibility (pure water permeate flux up to 683.5 L m −2 h −1 and BSA retention up to 86.6%). These results suggest that changing the blending ratio of the cast membrane solution provides a relevant idea for developing polyacrylonitrile ultrafiltration membranes with industrialization prospects.
研究领域:
膜科学
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高分子科学
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水处理技术
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Science Advances
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2024
·Vol. 10
·期 37
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IF 11.7
Ruifen Jiang,Gan Luo,Guosheng Chen,Yuhong Lin,Linjing Tong,Anlian Huang,Yang Zheng,Yong Shen,Siming Huang,Gangfeng Ouyang
Continuous industrialization has raised daunting environmental concerns, and there is an urgent need to develop a sustainable strategy to tackle the contamination issues. Here, we report a supramolecular photoenzyme ensemble enabling the harvest of solar energy to remove contaminations in water. The well-sourced oxidoreductase, laccase, is confined into a photoactive hydrogen-bonded organic framework (PHOF) through an in situ encapsulation method. The direct electron migration between the oxidation center in a PHOF and the reduction center in laccase facilitates synergistic photoenzyme-coupled catalysis, showing two orders of magnitude higher activity than free laccase for pollutant degradation under visible light, without the need for sacrificial agents or costly co-mediators. Such high decontamination efficiency also surpasses the reported catalysts. The structure and decontamination function of this supramolecular photoenzyme ensemble remain highly stable in complex environment matrices, presenting desirable reusability and almost 100% conversion efficiency of pollutants for real sewage samples. Our conceptual photoenzyme hybrid catalyst offers important insights into green and sustainable water decontamination.
研究领域:
环境科学
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材料科学
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化学
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可持续性
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
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2024
·Vol. 108
·期 1
·1-17
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IF 3.9
Li Meng,Ghonimy Abdallah,Chen Dai-Qiang,Li Ji-Tao,He Yu-Ying,López Greco Laura Susana,Dyzenchauz Fernando,Chang Zhi-Qiang
The gut microbial communities interact with the host immunity and physiological functions. In this study, we investigated the bacterial composition in Litopenaeus vannamei shrimp’s gut and rearing water under different host (developmental stage: juvenile and adult; health status: healthy and diseased) and environmental factors (temperature 25 °C and 28 °C; and light intensity: low and high). The PCoA analysis showed that all water samples were clustered together in a quarter, whereas the gut samples spread among three quarters. In terms of functional bacteria, gut samples of adult shrimp, healthy adult shrimp, adult shrimp raised at 28 °C, and juvenile shrimp under high light intensity exhibited a higher abundance of Vibrionaceae compared to each other opposite group. Gut samples of juvenile shrimp, infected adult shrimp, juvenile shrimp with low light intensity, and adult shrimp with a water temperature of 25 °C showed a higher abundance of Pseudoaltromonadaceae bacteria compared to each other opposite group. Gut samples of juvenile shrimp, healthy adult shrimp, adult shrimp raised at a water temperature of 28 °C, and juvenile shrimp with high light intensity showed the higher abundance of Firmicutes / Bacteroidota ratio compared to each other opposite group. Our results showed that L. vannamei juveniles are more sensitive to bacterial infections; besides, water temperature of 28 °C and high light intensity groups were both important conditions improving the shrimp gut bacterial composition under industrial indoor farming systems. Key points • Bacteria diversity was higher among shrimp intestinal microbiota compared to the rearing water . • Shrimp juveniles are more sensitive to bacterial infection compared to adults . • Water temperature of 28 °C and high light intensity are recommended conditions for white shrimp aquaculture . Graphical
研究领域:
水产养殖
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微生物学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
POLYMER BULLETIN
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2025
·
IF 4
Jin Yuwei,Pan Mengyao,Jiang Kexin,Mao Ying,Lu Wangyang,Jiang Wenbin,Chen Wenxing
Artificial diet-rearing silkworms are strongly developed due to climate constraints and market demand. However, research on the industrialized artificial diet-rearing silkworms at all industrialized silkworm rearing) remains relatively limited. This study comprehensively investigated the dissolution properties of sericin derived from industrialized silkworm rearing cocoons. The physicochemical features were systematically characterized through amino acid analyses, molecular weight distribution tests, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Under identical degumming conditions, the sericin from industrialized silkworm rearing cocoons exhibited superior dissolution properties, particularly faster dissolution speed and less remaining sericin content than that from mulberry leaf-rearing silkworm cocoons. In comparison, no significant differences were observed in amino acid composition, secondary structure, and thermal stability between sericin samples from these two cocoons. Importantly, for industrialized silkworm rearing cocoons, degumming treatment and sericin extraction will consume less energy, aligning with the principles of low-carbon production and environmental protection. Additionally, this work highlights the broad development potential and application prospects of industrialized silkworm rearing and the resulting sericin. Graphical abstract
研究领域:
材料科学
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生物技术
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高分子科学
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纺织工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
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2024
·
IF 3.3
Mengyuan Sui,Lili Wang,Rong Xue,Jun Xiang,Yufei Wang,Yuan Yuan,Qian Pu,Xin Fang,Bin Liu,Xingming Hu,Xiaoying Liu,Youyi Huang
BACKGROUND Enshi Yulu tea (ESYL) is the most representative of steamed green tea in China, but its aroma formation in processing is unclear. Thus, the ESYL volatiles during the whole industrial processing were investigated using headspace solid-phase microextraction coupled with gas chromatography–mass spectrometry. RESULTS A total of 134 volatiles were identified. Among these, 31 differential volatiles [ P < 0.05 and variable importance in projection (VIP) > 1] and 25 key volatiles [relative odor activity value (rOAV) and/or the ratio of each rOAV to the maximum rOAV (ROAV) > 1.0] were screened out, wherein β -ionone and nonanal were the most key odorants. Besides, the sensory evaluation combined with multivariate statistical analysis of volatiles pinpointed spreading, fixation, first drying, and second drying as the key processing steps that have a pronounced influence on the aroma quality of ESYL. Furthermore, the oxidative degradation of unsaturated fatty acids, synthesis of monoterpenes, and degradation of carotenoids were the main metabolic pathway for the formation of key odorants. CONCLUSION The study provides comprehensive insights into the volatile characteristics during the industrial processing of ESYL and promote our understanding of the aroma formation in steamed green teas. © 2024 Society of Chemical Industry.
研究领域:
食品科学
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化学工程
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农学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Haoru Shan,Xueqin Wang,Feihao Shi,Jianhua Yan,Jianyong Yu,Bin Ding
The separation and purification of chemical molecules from organic media under harsh chemical environments are of vital importance in the fields of water treatment, biomedical engineering, and organic recycling. Herein, we report the preparation of a flexible SiO2/SnO2 nanofibrous membrane (SiO2/SnO2 NFM) with high surface area and hierarchical porous structure by selecting poly(vinyl butyral) as pore-forming agent and embedding crystalline phase into amorphous matrix without using surfactant as sacrificial template. Benefiting from the uniform micropore size on the fibers and negatively charged properties, the membranes exhibit a precise selectivity toward molecules based on electrostatic interaction and size exclusion, which could separate organic molecule mixtures with the same electrostatic charges and different molecular sizes with a high efficiency of more than 97%. Furthermore, the highly tortuous open-porous structures and high porosity give rise to a high permeate flux of 288 000 L m–2 h–1. In addition, the membrane also displays excellent stability and can be reused for ten consecutive filtration–regeneration cycles. The integration of high filtration efficiency, large permeate flux, good reutilization, and easy to industrialization provides the SiO2/SnO2 NFM for potential applications in practical molecular purification and separation science.
研究领域:
水处理
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生物医学工程
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有机回收
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材料科学
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环境科学
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化学工程
✓ 已验证
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）