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期刊论文 4

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2023 1

2020 1

2019 1

2018 1

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MOF基催化剂 1

MnAl 1

吸附 1

气雾化 1

永磁体 1

球磨法 1

相变 1

纳米结构 1

自由基 1

过一硫酸盐 1

非自由基 1

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The role of manganese oxides in the activation of peroxymonosulfate (PMS)

Jianzhi Huang, Huichun Zhang

《环境科学与工程前沿(英文)》 2019年 第13卷 第5期 doi: 10.1007/s11783-019-1158-8

摘要: Manganese oxides (MnOx) have been demonstrated to be effective materials to activate Oxone (i.e., PMS) to degrade various contaminants. However, the contribution of direct oxidation by MnOx to the total contaminant degradation under acidic conditions was often neglected in the published work, which has resulted in different and even conflicting interpretations of the reaction mechanisms. Here, the role of MnOx (as both oxidants and catalysts) in the activation of Oxone was briefly discussed. The findings offered new insights into the reaction mechanisms in PMS-MnOx and provided a more accurate approach to examine contaminant degradation for water/wastewater treatment.

关键词: Peroxymonosulfate     Manganese oxides     Catalyst     Oxidant    

MOF-5@Ni衍生的ZnO@Ni3ZnC0.7/PMS体系用于有机物去除——对吸附-降解过程的深入理解 Article

帅又文, 黄雪, 张本银, 项璐, 徐浩, 叶倩, 鲁金凤, 张静

《工程(英文)》 2023年 第24卷 第5期   页码 254-264 doi: 10.1016/j.eng.2021.08.029

摘要:

基于过一硫酸盐的非均相催化活化技术在废水处理中越来越受到关注。因此,找到一种可持续、经济、有效的活性材料用于废水处理非常重要。本研究以金属有机框架材料(MOF)-5 为前驱体,通过添加镍离子并随后煅烧制备了一种稳定、可循环利用的材料ZnO@Ni3ZnC0.7,该材料表现出良好的吸附和催化性能。为了研究和优化实际应用条件,选择了罗丹明B(RhB)在水中的降解作为模型过程。研究表明,体系中有机物的去除涉及吸附和降解过程的耦合。基于此,提出了整个去除过程的机理。扫描电子显微镜、红外光谱分析和理论分析的结果证实,范德华力、静电吸引力和氢键影响吸附过程。电子顺磁共振分析、遮蔽实验和电化学测试证实,RhB的降解路径包括自由基和非自由基途径,表面羟基是关键的活性位点。对吸附底物的降解使活性位点得到再生。用简单方法再生的材料在4 个循环测试中对有机化合物保持很高的去除效率。此外,这种材料还可以有效地去除各种有机污染物,并且由于具有磁性,材料易于回收。结果表明,使用具有良好吸附能力的非均相催化材料可能是一种经济有效的策略。

关键词: MOF基催化剂     过一硫酸盐     吸附     自由基     非自由基    

Analysis of cost effective pavement treatment and budget optimization for arterial roads in the city of Chattanooga

Mbakisya ONYANGO, Saliha Ammour MERABTI, Joseph OWINO, Ignatius FOMUNUNG, Weidong WU

《结构与土木工程前沿(英文)》 2018年 第12卷 第3期   页码 291-299 doi: 10.1007/s11709-017-0419-5

摘要:

Many transportation agencies lack sufficient funds to maintain and repair roads, which results into increased pavement maintenance cost. Pavement Management System (PMS) has demonstrated to be an essential tool for proper management of infrastructure and proper utilization of available funds. The University of Tennessee at Chattanooga utilized Micropaver software as PMS tool to conduct a pavement management analysis of principal arterials in the City of Chattanooga. The study used the City of Chattanooga pavement database to create the current and future pavement conditions. Maintenance and repair (M&R) planning analysis was also performed in order to determine the most cost-effective treatment and suggest the optimum utilization of funds for the city. An analysis of five budget scenarios was conducted for a five-year plan using the critical pavement condition index (PCI) method (ASTM D6433). Results show that the backlog elimination budget would be the best scenario because it increases the pavement condition and eliminates the backlog of major maintenance and repairs over the five-year period. The unlimited budget seems though ideal, it does not improve pavement condition. Maintaining current condition and limited budget scenarios would increase both the backlog and the total cost of maintenance and repairs over the analysis period.

关键词: PMS     Micropaver     pavement budget     maintenance     rehabilitation    

快速球磨法高效实现各向同性气雾化MnAl 粉的纳米化制备 Article

J. Rial, E.M. Palmero, A. Bollero

《工程(英文)》 2020年 第6卷 第2期   页码 172-176 doi: 10.1016/j.eng.2019.03.013

摘要:

为了提高永磁体性能尤其是矫顽力,对气雾化MnAl粉末首次进行了30 s短时间球磨。结果表明,如此短的处理时间加上随后的退火可以高效地得到纳米结构和可控的相变。球磨过程中产生的微应变引起的缺陷与退火过程中形成的β相共同起到钉扎中心的作用,从而提高了矫顽力。研究表明,为了在磁化强度和矫顽力之间达到折中,在铁磁性τ-MnAl相和β相的形成之间找到一个平衡是很重要的。球磨(30 s)和退火后获得的矫顽力高达4.2 kOe (1 Oe = 79.6 A·m–1),与早期文献报道的球磨时间超过20 h时的矫顽力相当。球磨后粉末的退火温度降低了75 ℃,矫顽力提高了2.5倍,而退火后的气雾化材料的剩磁基本保持不变,为合成各向同性的MnAl基粉末开辟了一条新的途径。

关键词: 永磁体     纳米结构     相变     MnAl     气雾化     球磨法    

标题 作者 时间 类型 操作

The role of manganese oxides in the activation of peroxymonosulfate (PMS)

Jianzhi Huang, Huichun Zhang

期刊论文

MOF-5@Ni衍生的ZnO@Ni3ZnC0.7/PMS体系用于有机物去除——对吸附-降解过程的深入理解

帅又文, 黄雪, 张本银, 项璐, 徐浩, 叶倩, 鲁金凤, 张静

期刊论文

Analysis of cost effective pavement treatment and budget optimization for arterial roads in the city of Chattanooga

Mbakisya ONYANGO, Saliha Ammour MERABTI, Joseph OWINO, Ignatius FOMUNUNG, Weidong WU

期刊论文

快速球磨法高效实现各向同性气雾化MnAl 粉的纳米化制备

J. Rial, E.M. Palmero, A. Bollero

期刊论文