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New branched benign compounds including double antibiotic scaffolds: synthesis, simulation and adsorption

《化学科学与工程前沿（英文）》 2023年第17卷第2期页码 167-182 doi: 10.1007/s11705-022-2199-2

摘要： In this study, two novel environmental benign double antibiotic norfloxacin or ciprofloxacin scaffolds included branched molecules were prepared by multi-step routes and purified by simple performance, which were used as the target compounds (TCs). Meanwhile, a single norfloxacin or ciprofloxacin skeleton based molecules were synthesized as the reference compounds (RCs). The molecular geometry optimization and material simulation computation revealed that TCs presented smaller HOMO-LUMO energy gaps and larger binding energy levels on mild steel surface than RCs. The chemical adsorption of TCs on steel surface was confirmed by X-ray photoelectron spectroscopy, which could be processed by TCs chelation with iron ions. It was shown that TCs could be self-adsorbed on steel surface, which was demonstrated by atomic force microscopy and scanning electron microscopy. The anticorrosion of the studied compounds for mild steel in HCl solution was investigated by electrochemistry analysis. The results suggested that the anticorrosion efficiency could reach 95.86% (TC1) and 97.05% (TC2) at 0.050 mmol·L⁻¹ based on electrochemical impedance spectroscopy, which were much better than RCs (RC1, 69.23%; RC2, 74.16%). The adsorption isotherms of TCs on steel were further fitted, and a deep insight on adsorption was discussed.

关键词： branched compounds floxacin scaffold mild steel anticorrosion environmentally benign

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Preparation of manganese (III) acetylacetonate nanoparticles via an environmentally benign route

M. S. Shalaby, H. Abdallah

《化学科学与工程前沿（英文）》 2013年第7卷第3期页码 329-337 doi: 10.1007/s11705-013-1339-0

摘要： With the hope of overcoming the generation of hazardous materials to human health and environment, serious and great endeavor have been made in catalyst fabrication using green chemistry technology. In this paper, the manganese (III) acetylacetonate nanoparticles with diameters of about 146 nm were prepared by a simple and environmentally benign route based on hydrolysis of KMnO followed by reaction with acetylacetone in rapid stirring rate or ultrasonication. The as-prepared samples were characterized by X-ray diffraction, energy dispersive X-ray fluorescence (EDIX), Fourier transfer infrared spectroscopy and scanning electron microscope. Various parameters were investigated, and the pure and stable crystals of manganese (III) acetylacetonate could be obtained in 98% conversion at a molar ratio 7∶1 of acetylacetone to KMnO and 75°C after 60 min. We further proposed a mathematical model, and the predicted results from model were in good agreement with experimental results.

关键词： green chemistry manganese (III) acetylacetonate reaction conversion Mathematical model

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Light-induced variation in environmentally persistent free radicals and the generation of reactive radical

Yafang Shi, Yunchao Dai, Ziwen Liu, Xiaofeng Nie, Song Zhao, Chi Zhang, Hanzhong Jia

《环境科学与工程前沿（英文）》 2020年第14卷第6期 doi: 10.1007/s11783-020-1285-2

摘要： Abstract • Light irradiation increased the concentration of free radicals on HS. • The increased spin densities on HS readily returned back to the original value. • The “unstable” free radicals induced the formation of reactive radical species. • Reactive radicals’ concentration correlated strongly with EPFRs’ concentration. Environmentally persistent free radicals (EPFRs) in humic substances play an essential role in soil geochemical processes. Light is known to induce EPFRs formation for dissolved organic matter in aquatic environments; however, the impacts of light irradiation on the variation of EPFRs in soil humic substances remain unclear. In this study, humic acid, fulvic acid, and humin were extracted from peat soil and then in situ irradiated using simulated sunlight. Electron paramagnetic resonance spectroscopy results showed that with the increasing irradiation time, the spin densities and g-factors of humic substances rapidly increased during the initial 20 min and then gradually reached a plateau. After irradiation for 2h, the maximum spin density levels were up to 1.63 × 1017, 2.06 × 1017, and 1.77 × 1017 spins/g for the humic acid, fulvic acid, and humin, respectively. And the superoxide radicals increased to 1.05 × 1014–1.46 × 1014 spins/g while the alkyl radicals increased to 0.47 × 1014–1.76 × 1014 spins/g. The light-induced EPFRs were relatively unstable and readily returned back to their original state under dark and oxic conditions. Significant positive correlations were observed between the concentrations of EPFRs and reactive radical species (R2 = 0.65–0.98, p<0.05), which suggested that the newly produced EPFRs contributed to the formation of reactive radical species. Our findings indicate that under the irradiation humic substances are likely to be more toxic and reactive in soil due to the formation of EPFRs.

关键词： Peat Humic substances Environmentally persistent free radicals Light irradiation Reactive radical species

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Near-infrared benzodiazoles as small molecule environmentally-sensitive fluorophores

《化学科学与工程前沿（英文）》 2022年第16卷第1期页码 128-135 doi: 10.1007/s11705-021-2080-8

摘要： The development of fluorophores emitting in the near-infrared spectral window has gained increased attention given their suitable features for biological imaging. In this work, we have optimised a general and straightforward synthetic approach to prepare a small library of near-infrared-emitting C-bridged nitrobenzodiazoles using commercial precursors. C-bridged benzodiazoles have low molecular weight and neutral character as important features that are not common in most near-infrared dyes. We have investigated their fluorescence response in the presence of a wide array of 60 different biomolecules and identified compound 3i as a potential chemosensor to discriminate between Fe²⁺ and Fe³⁺ ions in aqueous media.

关键词： fluorescence probes iron screening library

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ENVIRONMENTAL ATTITUDES AND CONSUMER PREFERENCE FOR ENVIRONMENTALLY-FRIENDLY BEVERAGE PACKAGING: THE

《农业科学与工程前沿（英文）》 2023年第10卷第1期页码 95-108 doi: 10.15302/J-FASE-2022478

摘要：

● Consumer preference for environmentally-friendly beverage packaging was investigated.

关键词： China consumer preference food and beverage packaging green identity label information treatment plastics

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Assessing the effects of different dielectrics on environmentally conscious powder-mixed EDM of difficult-to-machine

Jagdeep SINGH,Rajiv Kumar SHARMA

《机械工程前沿（英文）》 2016年第11卷第4期页码 374-387 doi: 10.1007/s11465-016-0388-8

摘要：

Electrical discharge machining (EDM) is a well-known nontraditional manufacturing process to machine the difficult-to-machine (DTM) materials which have unique hardness properties. Researchers have successfully performed hybridization to improve this process by incorporating powders into the EDM process known as powder-mixed EDM process. This process drastically improves process efficiency by increasing material removal rate, micro-hardness, as well as reducing the tool wear rate and surface roughness. EDM also has some input parameters, including pulse-on time, dielectric levels and its type, current setting, flushing pressure, and so on, which have a significant effect on EDM performance. However, despite their positive influence, investigating the effects of these parameters on environmental conditions is necessary. Most studies demonstrate the use of kerosene oil as dielectric fluid. Nevertheless, in this work, the authors highlight the findings with respect to three different dielectric fluids, including kerosene oil, EDM oil, and distilled water using one-variable-at-a-time approach for machining as well as environmental aspects. The hazard and operability analysis is employed to identify the inherent safety factors associated with powder-mixed EDM of WC-Co.

关键词： WC hazard and operability analysis (HAZOP) discharging aerosol concentration dielectrics powders

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环境友好型水产养殖业发展战略

“中国水产养殖业可持续发展战略研究”课题综合组

《中国工程科学》 2016年第18卷第3期页码 1-7 doi: 10.15302/J-SSCAE-2016.03.001

摘要：

本项研究在总结我国水产养殖业发展主要经验基础上，论述了进一步发展水产养殖业的战略意义。在绿色、低碳和碳汇渔业发展新理念引导下，提出环境友好型水产养殖业发展战略，主要包括：推动水产养殖业现代化发展的“养护、拓展和高技术”三大发展战略；实现水产养殖业“高效、优质、生态、健康、安全”可持续发展的任务目标；近期需着力构建的现代水产养殖业创新发展体系的重点任务等。针对目前产业存在的问题和发展需求,提出重视水产养殖对发展空间的需求、建立养殖水域容纳量评估制度、发展生态系统水平的新型养殖生产模式、实施养殖装备提升工程、加强水产养殖管理与执法能力建设等对策建议。

关键词：水产养殖环境友好发展战略对策建议

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钢铁企业实现可持续发展的途径

谢企华

《中国工程科学》 2005年第7卷第5期页码 9-15

摘要：

可持续发展战略是中国钢铁企业的必然选择。实施这一战略可以从环保、节能、资源的综合利用起步，以技术进步、环保投资为支撑，推进循环经济，从而为实现企业与社会长期和谐、协调一致的发展承担起应有的责任。

关键词：宝钢可持续发展环境友好节能降耗资源的有效利用绿色制造

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水产生态养殖与新养殖模式发展战略研究

方建光,李钟杰,蒋增杰,王齐东

《中国工程科学》 2016年第18卷第3期页码 22-28 doi: 10.15302/J-SSCAE-2016.03.004

摘要：

发展可持续的水产养殖对于保障水产品供给、改善膳食结构、促进农民增收等方面具有重要意义。本文系统阐述了水产生态养殖与新养殖模式发展战略研究的意义，分析了国内外水产养殖业的发展现状，结合国内外水产生态养殖与新养殖模式发展的经验以及我国面临的主要问题，提出了我国水产养殖业高效、可持续发展的关键技术和对策建议。

关键词：水产养殖环境友好养殖模式

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基于GIS 的中国深圳市城市快速路环境敏感性评估 Article

李骐安, 郭凤清, 关云涛

《工程（英文）》 2018年第4卷第2期页码 230-234 doi: 10.1016/j.eng.2018.03.002

摘要：

随着城市化、人口增长以及社会经济的迅猛发展，中国的城市生态环境日趋恶化。深圳市正在建设一条经过环境敏感区（ESA）的城市快速路。由于城市快速路的径流系数大、污染物累积量高、污染物成分复杂，导致城市快速路造成的潜在环境污染问题格外严峻。鉴于ESA极易受到人为干扰，因此应给予特别关注。为了评估该城市快速路沿线的环境敏感性，并最大限度地减少道路建设及未来通行对周边生态系统的影响，本文借助地理信息系统（GIS）对相关区域的环境敏感性进行了评估。最终的ESA分布图被划分为4 个环境敏感度等级。结果表明该快速路的大部分路段（11.93 km）经过高度敏感区，占快速路总里程的52.3%，且90% 以上的路段经过ESA。本文为基于低影响开发技术的初期降雨径流处理设施的布局方案优化提供重要指导，以最大限度地减小道路径流污染对周边生态环境的影响。

关键词：环境敏感区城市快速路地理信息系统低影响开发

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环境友好型全水压冲击凿岩机动力学建模与数值仿真

岳文辉,刘德顺,伍先明,朱萍玉,李夕兵

《中国工程科学》 2007年第9卷第8期页码 57-61

摘要：

介绍了以普通水作为传动、支撑推进、排屑和润滑介质的环境友好型全水压凿岩机；建立了以弹性杆、弹簧为基本单元的冲击凿岩机波动力学模型；对YST–25全水压凿岩机进行了动态数值仿真与分析。研究结果表明：活塞最大压应力为102 MPa，最大拉应力为28 MPa，满足了强度设计要求；钎杆中的应力比活塞的大；尽量减小活塞的截面积变化有利于延长活塞寿命；为了保证凿岩速度和能量传递效率，YST–25凿岩机宜于在中硬到硬岩中钻进。这为环境友好型全水压冲击凿岩机的改进设计和效能评估提供了依据。

关键词：冲击波动力学仿真水压凿岩机