海藻酸钠基凝胶吸附材料对Cr(VI)吸附性能研究

海藻酸钠(SA)是一种天然生物质材料,其来源广、价格低,聚乙烯亚胺是一种含有氨基(-NH_(2))的水溶性高分子聚合物,螯合重金属离子能力强,众多研究者将二者结合其制备成吸附剂去除水溶液中的金属离子。本研究以海藻酸钠为基体,加入碳酸钙和聚乙烯亚胺,以戊二醛为交联剂,经冷冻干燥后形成吸附较好的海藻酸钠-聚乙烯亚胺吸附材料。采用吸附实验研究了材料对水中Cr(VI)的吸附性能,并研究初始浓度、溶液pH、吸附时间、吸附剂用量等对吸附效果的影响。实验结果表明:在Cr(VI)溶液初始浓度为15 mg/L、吸附剂用量0.4 g、吸附时间200 min,吸附温度为313 K时,Cr(VI)去除率达90%以上。

应用型背景下标志与VI设计课程实施课程思政的路径研究

全面推进课程思政建设是落实立德树人根本任务的战略举措。为适应新时代对课程思政高质量发展的要求,该文基于高校“三全育人”工作需求,在应用型背景下,探索课程思政元素有机融入艺术设计类专业课程的路径。针对标志与VI设计课程,首先根据神经语言程序学者罗伯特·迪尔茨关于人的认知的六个层次理论,设计课程思政元素体系,进而通过详细解读和挖掘六种层次描述课程思政元素体系的设计思路,最后提出从五个讲授部分和三个实践部分,在课程实施过程中融入课程思政元素的具体策略和路径,以期促进艺术设计类专业教学与课程思政有机融合,充分发挥课程思政在高校艺术设计类专业课程中的育人作用,为标志与VI设计课程的思政教学设计与教学改革提供参考。

基于绿色生物质阿拉伯树脂的氮掺杂碳点用于检测工业废水中的Cr(VI)

以绿色生物质阿拉伯树脂(AG)为碳源,三羟甲基氨基甲烷(Tris)为氮源,二者按质量比1∶4混合,通过水热法制备了一种新型氮掺杂碳点(NACDs),并基于NACDs构建了一种荧光传感器,用于工业废水中Cr(VI)的检测。取200μL样品溶液、NACDs溶液100μL、0.2 mmol·L^(-1)磷酸氢二钠-磷酸二氢钠缓冲液(pH 8.0) 200μL加至2 mLEP管中,用水定容至1 mL。室温反应10 min后,在激发波长365 nm处扫描,并在430 nm处测量体系荧光强度。结果表明,在365 nm的激发波长下,NACDs于430 nm表现出强荧光信号,并可被Cr(VI)选择性猝灭。Cr(VI)的质量浓度在0.25~3.00 mg·L^(-1)内与NACDs的荧光猝灭值呈线性关系,检出限(3s/k)为0.13 mg·L^(-1)。按照标准加入法对模拟工业废水样品进行回收试验,回收率为103%~105%,测定值的相对标准偏差(n=6)均小于3.0%,加标样品所得测定结果与国家标准方法GB/T 15555.4—1995的无显著性差异。

VI族元素修饰对二维AlN电子性质影响的第一性原理研究

采用密度泛函理论的第一性原理计算方法,研究了VI族元素(O、S、Se、Te)修饰对二维AlN电子性质的影响。计算结果表明,O修饰后,二维AlN体系的能带发生劈裂,从而转变为磁性材料;S、Se和Te修饰后,二维AlN电子态密度曲线自旋向上和自旋向下完全对称,形成了非磁性结构。从态密度图可以看出,费米能级附近的态密度主要由修饰原子的p态电子和N原子的p态电子贡献,导带底部逐渐向低能区移动,导致二维AlN的吸收波长阈值从紫外线区域向可见光移动。因此,修饰的二维AlN光催化效率提高,并有应用于可见光响应的光电子和自旋电子器件的可能。

电纺丝制备磁性单晶BiFeO_(3)纳米纤维并用于Cr(VI)的可见光催化还原

本工作提出一种将溶胶凝胶与静电纺丝结合的分步快速烧结技术,成功制备了单晶BiFeO_(3)纳米纤维。通过热重差热分析(TG-DTG)、XRD、SEM、TEM、EDS、紫外可见漫反射光谱和氮气吸附脱附曲线等测试对所制备材料的结构和形貌进行表征。同时,考察了BiFeO_(3)纳米纤维在可见光下对水中Cr(VI)的光催化还原性能。结果显示,相比于传统方式制备的纳米颗粒,该材料因更大的比表面积而具有更高的光催化活性。空穴消耗剂酒石酸的加入能够促进该材料对Cr(VI)的光催化还原反应,使还原效率提高87%。总之,本文制备的BiFeO_(3)材料能在可见光下响应,并在常温下具有弱磁性,能通过磁场力回收,在环境净化领域具有广阔的应用前景。

Jet formation and penetration performance of a double-layer charge liner with chemically-deposited tungsten as the inner liner

This paper proposes a type of double-layer charge liner fabricated using chemical vapor deposition(CVD)that has tungsten as its inner liner.The feasibility of this design was evaluated through penetration tests.Double-layer charge liners were fabricated by using CVD to deposit tungsten layers on the inner surfaces of pure T2 copper liners.The microstructures of the tungsten layers were analyzed using a scanning electron microscope(SEM).The feasibility analysis was carried out by pulsed X-rays,slug-retrieval test and static penetration tests.The shaped charge jet forming and penetration law of inner tungsten-coated double-layer liner were studied by numerical simulation method.The results showed that the double-layer liners could form well-shaped jets.The errors between the X-ray test results and the numerical results were within 11.07%.A slug-retrieval test was found that the retrieved slug was similar to a numerically simulated slug.Compared with the traditional pure copper shaped charge jet,the penetration depth of the double-layer shaped charge liner increased by 11.4% and>10.8% respectively.In summary,the test results are good,and the numerical simulation is in good agreement with the test,which verified the feasibility of using the CVD method to fabricate double-layer charge liners with a high-density and high-strength refractory metal as the inner liner.

基于VI视觉识别系统的饲料品牌策划

VI视觉识别系统是具有统一性、系统性的视觉符号系统,在饲料品牌策划中能起到树立品牌形象,扩大品牌知名度和影响力,增强品牌信任感等显著效果,所以能为饲料品牌发展提供有力支撑。而在应用VI视觉识别系统的过程中,要注意把握好饲料品牌策划的原则,力求通过标志设计、标准色设计、包装设计以及信息推广等途径不断优化饲料品牌策划方案,确保饲料品牌能在激烈的市场竞争中脱颖而出,以良好的品牌为饲料企业带来溢价效应和增值效应。

胺基功能化介孔硅材料对铀(VI)的吸附及机理研究

本研究探讨了胺基功能化介孔硅材料(AFPS)对水体中铀(VI)的吸附性能及其吸附机理。通过合成8种具有不同孔径和胺基功能团(APTES和AEPTES)的AFPS,评估了这些材料在不同pH条件下对铀(VI)的吸附效果。实验结果显示,在pH值约为5.5的条件下,AFPS对铀(VI)的吸附效率最高。孔径分析表明,AEPTES功能团的最佳孔径为4.1 nm,而APTES功能团的最佳孔径为2.7 nm。吸附机理研究表明,胺基通过与水合铀酰分子团表面的羟基(OH-)结合,实现了对铀(VI)的有效吸附。本研究不仅为理解AFPS吸附铀(VI)的机制提供了科学依据,也为开发新型高效吸附材料提供了理论支持和研究方向。

Trace elements in magmatic and hydrothermal quartz:Implications on the genesis of the Xingluokeng Tungsten Deposit,South China

The Xingluokeng deposit is the largest gran-ite-related tungsten deposit within the Wuyi metallogenic belt in South China.The Xingluokeng intrusion primarily consists of porphyritic biotite granite,biotite granite,andfine-grained granite.The deposit is represented by veinlet-disseminated mineralization with K-feldspathization and biotitization,alongside quartz-vein mineralization with gre-isenization and sericitization.This study investigates in-situ analyses of quartz compositions from both the intrusion and hydrothermal veinlets and veins.Trace element correlations indicate that trivalent Al^(3+)and Fe^(3+)replace Si^(4+)within the quartz lattice,with monovalent cations(such as Li^(+),Na^(+),and K^(+))primarily serving as charge compensators.Low Ge/Al ratios(<0.013)of quartz from granites suggest a mag-matic origin.The low Al/Ti and Ge/Ti ratios,accompanied by high Ti contents in quartz,suggest that the porphyritic biotite granite and biotite granite are characterized by rela-tively low levels of differentiation and high crystallization temperatures.In contrast,thefine-grained granite exhibits a higher degree of fractionation,lower crystallization tem-peratures,and a closer association with tungsten miner-alization.Ti contents in quartz from quartz veins indicate Qz-Ⅰformed at temperatures above 400°C,while Qz-Ⅱto Qz-Ⅴformed at temperatures below 350°C.Variations in different generations of quartz,as indicated by Al content and(Al+Fe)/(Li+Na+K)ratio,suggest that Qz-Ⅰprecipi-tated from a less acidicfluid with a stable pH,whereas Qz-Ⅱto Qz-Ⅴoriginated from a more acidicfluid with notable pH variations.Consequently,alkaline alteration and acidic alteration supplied the essential Ca and Fe for the precipita-tion of scheelite and wolframite,respectively,highlighting a critical mechanism in tungsten mineralization at the Xin-gluokeng deposit.

VI创意设计提升奢侈品皮具品牌影响力探析

随着社会经济的发展,VI的创意设计对于品牌影响力的作用越来越受到品牌方和消费者的重视。如何通过VI创意设计来提升奢侈品皮具品牌的影响力也是一个值得探讨的过程。本文从VI的概念、VI创意设计在奢侈品皮具中的表现形式和如何提升奢侈品皮具品牌的影响力等方面进行分析,以达到抛砖引玉的作用。

Effective Elimination of Hazardous Chromium (VI) Using Periodic Elements and Contemporary Adsorption Methods by Using Magnesium Ferrite Nanoparticle: A Review

A well-known hazardous metal and top contaminant in wastewater is hexavalent chromium. The two forms of most commonly found chromium are chromate ( CrO 4 2− ) and dichromate ( Cr 2 O 7 2− ). Leather tanning, cooling tower blow-down, plating, electroplating, rinse water sources, anodizing baths etc. are the main sources of Cr (VI) contamination. The Cr (VI) is not only non-biodegradable in the environment but also carcinogenic to living population. It is still difficult to treat Cr contaminated waste water effectively, safely, eco-friendly, and economically. As a result, many techniques have been used to treat Cr (VI)-polluted wastewater, including adsorption, chemical precipitation, coagulation, ion-exchange, and filtration. Among these practices, the most practical method is adsorption for the removal of Cr (VI) from aqueous solutions, which has gained widespread acceptance due to the ease of use and affordability of the equipment and adsorbent. It has been revealed that Fe-based adsorbents’ oxides and hydroxides have high adsorptive potential to lower Cr (VI) content below the advised threshold. Fe-based adsorbents were also discovered to be relatively cheap and toxic-free in Cr (VI) treatment. Fe-based adsorbents are commonly utilized in industry. It has been discovered that nanoparticles of Fe-, Ti-, and Cu-based adsorbents have a better capacity to remove Cr (VI). Cr (VI) was effectively removed from contaminated water using mixed element-based adsorbents (Fe-Mn, Fe-Ti, Fe-Cu, Fe-Zr, Fe-Cu-Y, Fe-Mg, etc.). Initial findings suggest that Cr (VI) removal from wastewater may be accomplished by using magnesium ferrite nanomaterials as an efficient adsorbent.

Efficient and rapid capture of uranium(Ⅵ) in wastewater via multiamine modified β-cyclodextrin porous polymer

It is quite important to ensure the safety and sustainable development of nuclear energy for the treatment of radioactive wastewater. To treat radioactive wastewater efficiently and rapidly, two multi-amine β-cyclodextrin polymers(diethylenetriamine β-cyclodextrin polymer(DETA-TFCDP) and triethylenetetramine β-cyclodextrin polymer(TETA-TFCDP)) were prepared and applied to capture uranium. Results exhibited that DETA-TFCDP and TETA-TFCDP displayed the advantages of high adsorption amounts(612.2and 628.2 mg·g-1, respectively) and rapid adsorption rates, which can reach(88 ± 1)% of their equilibrium adsorption amounts in 10 min. Moreover, the adsorbent processes of DETA-TFCDP and TETATFCDP on uranium(Ⅵ) followed the Langmuir model and pseudo-second-order model, stating they were mainly chemisorption and self-endothermic. Besides, TETA-TFCDP also showed excellent selectivity in the presence of seven competing cations and could be effectively reused five times via Na2CO3as the desorption reagent. Meanwhile, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy illustrated that the enriched multi-amine groups and oxygen-containing functional groups on the surface of TETA-TFCDP were the main active sites for capturing uranium(Ⅵ). Hence, multi-amine β-cyclodextrin polymers are a highly efficient, rapid, and promising adsorbent for capturing uranium(Ⅵ)from radioactive wastewater.

乡村振兴战略背景下“VI设计与制作”课程思政教学探索与实践——以农产品包装设计项目为例

2023年中央一号文件《中共中央国务院关于做好2023年全面推进乡村振兴重点工作的意见》中提到实施文化产业赋能乡村振兴计划,如何引领乡村产业发展,推动乡村振兴战略,提升农产品消费引力,成为业界关注的热点。产品包装设计是品牌形象的直接展示,对于农产品的品牌打造、提档升级、促进销售有着重要作用。本文以农产品包装设计项目为例,探究如何将思政元素融入到“VI设计与制作”课程中,以创意设计赋能新农村建设为切入,让设计助力乡村振兴,提升学生服务国家乡村振兴的意识,实现培养“重民生、强素质、懂设计、会创新”的人才目标。

多媒体时代“VI设计”课程教学创新研究

“VI设计”课程是视觉传达设计专业的专业核心课程。传统VI设计以企业或品牌的基础系统和应用系统设计为主,随着多媒体技术时代的涌入,VI设计着重以品牌形象塑造为设计理念,通过品牌元素与IP形象等应用延展,树立品牌意识和观念。分析了“VI设计”课程教学存在的问题,阐述了“VI设计”课程教学创新策略。

Mark VIe控制系统在燃驱压缩机组控制系统升级改造中的应用

针对当前集成了不同厂家几套子系统的一些燃驱压缩机组控制系统结构复杂、维护成本高等问题,应用基于Mark VIe控制平台来升级改造该系统。以某改造项目为例,应用双冗余Mark VIe控制系统架构,Mark VIe SIL3模件作为紧急停机和火气保护系统的硬件,同时采用Mark VIe ControlST统一软件平台。结果表明:新控制系统采用了一体化硬件、软件设计,提高了机组控制系统的安全可靠性,有利于日常运行维护,而且新系统具有在线监测功能,有助于系统故障排查。

沉浸式教学模式的探索实践——以《VI设计》为例

文章首先对沉浸式教学模式的概念进行了阐述,分析了视觉传达专业《VI设计》的教学现状,并论述了沉浸式教学模式在高校教学活动中的探索与实践。具体来说,文章以《VI设计》课程为例,从教师授课内容、学生研究方法、作业成绩评定等方面对沉浸式教学模式展开论述,通过教学模式与沉浸式的结合,探讨了全球数字化背景下高校教学模式的新思路。

本科教育VI设计教学中传统图形融入探索

本科教育VI设计教学中融入传统图形,有助于培养学生创新思维和设计思维,还能培养学生文化意识,传承我国传统文化。基于此,本文分析本科教育VI设计教学中传统图形的艺术表现,探讨本科教育传统图形融入VI设计教学实践流程,并从案例教学、教学方法多样化、学生文化意识培育、小组讨论学习、传统图形的基本信息介绍等方面出发,探索本科教育VI设计教学中传统图形融入策略和方法,旨在提供一些有益参考,提高VI设计教学效率。

Calculating the Crystallite Size of Microsorum scolopendria AgCl Nanoparticles and Their Biological Activities

In this work, AgCl nanoparticles were synthesized from Microsorum scolopendria (MS) aqueous extract and AgNO3 solution. Preliminary confirmation was a color change from a light brown to a dark-colored solution and a UV-Vis spectra surface plasmon resonance peak at 427 nm. Measured vibrational frequencies at 1713 cm1 and 1030 cm1 for C-O stretching of carboxylic acid or aliphatic ketone, and 1547 cm1 for possibly N-O stretching of nitro compounds by Infrared (FTIR) analysis explain the possible biomaterial electronegative species or functional groups responsible for the reduction of Ag ( 1) to Ag (0) for the formation of MS-AgCl nanoparticles. XRD analysis studies revealed that these particles contained face-centered cubic crystallites of metallic AgCl of 100 % with an average calculated crystallite size range of 30.34 nm (SD = 5.10 nm) by Scherrers equation and a calculated crystallite size of 66.04 nm with a lattice strain of 0.00175 nm by Williamson Hall equation. The measured albumin denaturing activity of MS-AgCl nanoparticles gave an IC50 value of 26.70 g/mL and 1.35 g/mL for the positive control diclofenac. Additionally, the measured ability of phosphomolybdate complex formation, the antioxidant IC value of MS-AgCl nanoparticles was 35.29 g/mL, and positive control ascorbic acid was 13.91 g/mL. In all, using MS fern frond aqueous extracts, this preliminary work confirms MS-AgCl nanoparticles as potential therapeutic agents for oxidative stress, inflammatory problems, and related diseases.

民族装饰元素融入品牌VI设计课程的教学改革探析

探讨了品牌VI设计中民族装饰元素的融合方法与表现方式,并将其归纳成了一定的教育改革方法,用于优化目前我国高校品牌VI设计课程中同质化严重、缺乏针对我国场域的独立完整模块的情况。将民族装饰元素作为切入点进行教学改革,以建立更好的知识模块与学科架构。

艺术设计课程中的VI设计课程的教学改革研究

通过推动VI设计课程教学改革,不仅可以培养学生艺术设计实践能力和艺术设计创意思维,还能提升学生艺术设计专业综合素质。基于此。本文阐述艺术设计课程中VI设计课程教学改革价值,分析艺术设计课程中VI设计课程教学改革的现实困境,并从教学资源、理论实践混合式教学、课程设置、项目实践等方面出发,探究艺术设计课程中的VI设计课程的教学改革策略,旨在提供一些有益参考,提高VI设计课程教学效率。