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Probing the surface forces between air bubbles and bitumen via direct force Measurements: Effects of aqueous chemistry

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FUEL 2024年第PartC期357卷

作者： Yang, Diling Qiao, Chenyu Mao, Xiaohui Wang, Jingyi Xie, Lei Chen, Jingsi Peng, xuwen Peng, Qiongyao Wang, Tao Liu, Qi Zhang, Hao zeng, Hongbo Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada

The surface interactions of air bubbles and other components (e.g., particles, oil droplets) significantly influence the operation efficiency of a variety of engineering processes such as oily water treatment, bitumen extraction and flotation. Herein, the surface interactions of air bubbles with two types of Athabasca bitumen samples in aqueous solutions of varying pH, salinity, type of cations and in the presence of surfactants have been systematically characterized using a bubble probe atomic force microscope (AFM) technique. AFM imaging has revealed that exposure to high concentrations of NaCl and CaCl2 solutions or alkaline environments causes roughening of the bitumen surfaces. The results of surface force measurements demonstrate that the interaction and attachment behaviors between bubbles and bitumen are significantly affected by ionic strength, solution pH, and the presence of surfactants. The experimental force measurement results could be accurately described by a theoretical model that incorporates Reynolds lubrication theory and augmented Young-Laplace equation, with the inclusion of disjoining pressure. In low-salinity conditions, the bubble-bitumen interaction is dominated by electric double layer (EDL) repulsion, which prevents surface attachment. This effect is more pronounced at elevated pH conditions. In high-salinity solutions, however, the EDL interactions are significantly reduced, and the hydrophobic interaction becomes the dominant factor, overcoming the van der Waals repulsion and leading to the attachment of bubbles to bitumen surfaces. Raising aqueous pH weakens the bubble-bitumen hydrophobic interaction, whereas the introduction of calcium ions strengthens this interaction, resulting in enhanced surface attachment. Interestingly, even in high-salinity conditions, the presence of a small number of surfactants can inhibit bubble-bitumen contact, mainly caused by reduced hydrophobic attraction and increased steric repulsion. This work provid

关键词： bitumen oil sands bitumen flotation bubbles surface interactions

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Surface interaction mechanisms in mineral flotation: Fundamentals, measurements, and perspectives

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ADVANCES IN COLLOID AND INTERFACE SCIENCE 2021年 295卷 102491-102491页

作者： Xie, Lei Wang, Jingyi Lu, Qiuyi Hu, Wenjihao Yang, Diling Qiao, Chenyu Peng, xuwen Peng, Qiongyao Wang, Tao Sun, Wei Liu, Qi Zhang, Hao zeng, Hongbo Cent South Univ Sch Minerals Proc & Bioengn Changsha 410083 Peoples R China Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada Cent South Univ Sch Met & Environm Changsha 410083 Peoples R China

As non-renewable natural resources, minerals are essential in a broad range of biological and technological applications. The surface interactions of mineral particles with other objects (e.g., solids, bubbles, reagents) in aqueous suspensions play a critical role in mediating many interfacial phenomena involved in mineral flotation. In this work, we have reviewed the fundamentals of surface forces and quantitative surface property-force relationship of minerals, and the advances in the quantitative measurements of interaction forces of mineral-mineral, bubble-mineral and mineral-reagent using nanomechanical tools such as surface forces apparatus (SFA) and atomic force microscope (AFM). The quantitative correlation between surface properties of minerals at the solid/water interface and their surface interaction mechanisms with other objects in complex aqueous media at the nanoscale has been established. The existing challenges in mineral flotation such as characterization of anisotropic crystal plane or heterogeneous surface, low recovery of fine particle flotation, and in-situ electrochemical characterization of collectorless flotation as well as the future work to resolve the challenges based on the understanding and modulation of surface forces of minerals have also been discussed. This review provides useful insights into the fundamental understanding of the intermolecular and surface interaction mechanisms involved in mineral processing, with implications for precisely modulating related interfacial interactions towards the development of highly efficient industrial processes and chemical additives.

关键词： Bubble-mineral-reagent interaction Mineral flotation Dewatering process Surface interactions atomic force microscope (AFM) Surface forces apparatus (SFA)

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利用构造地貌方法限定走滑断裂第四纪滑动速率的不确定性及意义:以海原断裂带为例

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地球科学 2024年第2期49卷 759-780页

作者：王子君姚文倩刘静邵延秀王文鑫沈续文高云鹏徐晶天津大学地球系统科学学院表层地球系统科学研究院天津300072 中国地震局地质研究所地震动力学国家重点实验室北京100029 中国地震局第二监测中心陕西西安710054

断层滑动速率是理解复杂断层系统应变分配与评估地震危险性的重要参数,在多种研究方法中,利用构造地貌学方法限定走滑断裂的第四纪滑动速率较为普遍.在青藏高原活动断裂体系中,海原断裂带承载了部分印度-欧亚板块碰撞产生的应变,其滑动... 详细信息

断层滑动速率是理解复杂断层系统应变分配与评估地震危险性的重要参数,在多种研究方法中,利用构造地貌学方法限定走滑断裂的第四纪滑动速率较为普遍.在青藏高原活动断裂体系中,海原断裂带承载了部分印度-欧亚板块碰撞产生的应变,其滑动速率的精细厘定也是高原构造变形动力学分析的重要参数.过去三十年间前人采用构造地貌学方法对其进行了大量的滑动速率研究,结果位于2.3~16 mm/a之间,不同研究间相差较大,因此引发了众多争议与困惑.在对已有研究进行详细评述的基础上,指出前人研究结果不确定性的重要原因是上级阶地与下级阶地重建模型的选择.结果认为,基于两种位移累积起始时间定义的模型得到的往往是滑动速率的上限或下限,不能简单地将其等同于滑动速率真实值.当缺乏观测数据可以辅助判别两种模型的可靠程度时,应基于上、下级阶地废弃年龄同时对滑动速率进行限定,这是对滑动速率计算过程中客观存在的不确定性的尊重和认可.海原断裂带滑动速率的评估将为后续基于青藏高原内部诸多活动断裂进行两种端元变形模型合理性的分析工作提供重要的方法借鉴.

关键词：滑动速率海原断裂带构造地貌学河流阶地陡坎上、下限评估

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青藏高原东南缘次林错岩体晚白垩世—早新生代快速剥蚀

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地质学报 2022年第10期96卷 3332-3344页

作者：沈续文沈晓明刘静曾令森杨超群葛玉魁邢宇堃曾宪阳王子君李云帅李金阳天津大学地球系统科学学院天津300072 应急管理部国家自然灾害防治研究院北京100085 中国地质科学院地质研究所北京100037 中国地震局地质研究所北京100029

青藏高原东南缘是研究构造、地貌演化和气候变化相互作用的理想场所,前人研究主要揭示了晚始新世—早中新世和晚中新世以来的快速剥蚀事件,缺乏晚白垩世—早新生代时期地貌演化过程的研究。次林错花岗岩已有的低温热年代学数据覆盖了整... 详细信息

青藏高原东南缘是研究构造、地貌演化和气候变化相互作用的理想场所,前人研究主要揭示了晚始新世—早中新世和晚中新世以来的快速剥蚀事件,缺乏晚白垩世—早新生代时期地貌演化过程的研究。次林错花岗岩已有的低温热年代学数据覆盖了整个新生代时期,为探索该区域新生代早期的剥露演化历史提供了重要资料。该岩体新生代早期冷却事件是岩浆冷却单一作用的结果,还是受快速剥蚀作用的影响,目前仍然存疑,需要定量研究。因此,本文结合已有的岩石地化和年代学数据,对次林错花岗岩开展了锆石饱和温度和一维岩浆冷却模拟研究。锆石饱和温度计算结果表明次林错花岗岩的岩浆结晶温度介于647~705℃之间,属低温花岗岩。一维岩浆冷却模拟结果显示岩体侵位时的最小围岩温度为160~120℃,对应深度约为3.7~5.0 km。结合锆石和磷灰石(U-Th)/He年代学数据,本文认为该岩体在晚白垩世—早新生代时期(67~40 Ma)经历了一期剥蚀量至少为2 km的快速剥蚀事件。已发表成果的综合分析表明,此次快速剥露事件可能是整个青藏高原地区广泛存在的构造剥蚀事件,新特提斯洋的俯冲闭合与印亚板块的初始碰撞可能是触发此次大规模区域剥蚀的主要原因。

关键词：青藏高原东南缘次林错花岗岩晚白垩世—早新生代快速剥蚀锆石饱和温度计一维岩浆冷却模拟低温热年代学

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Mapping of Soil Liquefaction Associated with the 2021 Mw 7.4 Maduo (Madoi) Earthquake Based on the UAV Photogrammetry Technology

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REMOTE SENSING 2023年第4期15卷 1032页

作者： Wang, Wenxin Jing, Liu-zeng Shao, Yanxiu Wang, Zijun Han, Longfei Shen, xuwen Qin, Kexin Gao, Yunpeng Yao, Wenqian Hu, Guiming zeng, Xianyang Liu, Xiaoli Wang, Wei Cui, Fengzhen Liu, Zhijun Li, Jinyang Tu, Hongwei Tianjin Univ Inst Surface Earth Syst Sci Sch Earth Syst Sci Tianjin 300072 Peoples R China China Earthquake Adm Inst Geol State Key Lab Earthquake Dynam Beijing 100029 Peoples R China China Earthquake Adm Inst Seismol Key Lab Earthquake Geodesy Wuhan 430071 Peoples R China Earthquake Agcy Qinghai Prov Xining 810001 Peoples R China

The 2021 Mw 7.4 Maduo (Madoi) earthquake that struck the northern Tibetan Plateau resulted in widespread coseismic deformation features, such as surface ruptures and soil liquefaction. By utilizing the unmanned aerial vehicle (UAV) photogrammetry technology, we accurately recognize and map 39,286 liquefaction sites within a 1.5 km wide zone along the coseismic surface rupture. We then systematically analyze the coseismic liquefaction distribution characteristics and the possible influencing factors. The coseismic liquefaction density remains on a higher level within 250 m from the surface rupture and decreases in a power law with the increasing distance. The amplification of the seismic waves in the vicinity of the rupture zone enhances the liquefaction effects near it. More than 90% of coseismic liquefaction occurs in the peak ground acceleration (PGA) > 0.50 g, and the liquefaction density is significantly higher in the region with seismic intensity > VIII. Combined with the sedimentary distribution along-strike of the surface rupture, the mapped liquefaction sites indicate that the differences in the sedimentary environments could cause more intense liquefaction on the western side of the epicenter, where loose Quaternary deposits are widely spread. The stronger coseismic liquefaction sites correspond to the Eling Lake section, the Yellow River floodplain, and the Heihe River floodplain, where the soil is mostly saturated with loose fine-grained sand and the groundwater level is high. Our results show that the massive liquefaction caused by the strong ground shaking during the Maduo (Madoi) earthquake was distributed as the specific local sedimentary environment and the groundwater level changed.

关键词： soil liquefaction Maduo (Madoi) earthquake earthquake ground motion sedimentary environment UAV photogrammetry technology

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Process Parameters Analysis and Artificial Neural Network Prediction for Color Variation after Laser Induced Ti-6Al-4V Surface Coloring

SSRN

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SSRN 2023年

作者： Zhou, Kai Wu, Xin zeng, Hui Che, Xingbang Wang, xuwen Xiao, Han Yang, Can Yang, Huan Ruan, Shuangchen Li, Chunbo Sino-German College of Intelligent Manufacturing Shenzhen Technology University Shenzhen518118 China School of Remote Sensing and Information Engineering Wuhan University Wuhan430079 China DH Automation Technology Co. Ltd Shenzhen518110 China Key Laboratory of Advanced Optical Precision Manufacturing Technology Guangdong Higher Education Institutes Shenzhen Technology University Shenzhen518118 China

Metal surface coloring process is considered as a process with strong technical influence because its’ advantage in improving the appearance of metal, identifying metal products with information, preventing corrosion of metal substrate, excellent color stability and other characteristics. Laser induced metal coloring is expected to become a metal coloring process with stability and efficiency for its quickly response in producing bright colors on the metal matrix by simply setting the process parameters. The process is simple and with excellent efficiency and accuracy. At present, in the field of laser induced coloring, the main method is to find the corresponding relationship between laser energy density and color formation with a large number of laser parameters, the main limit in this method comes from lacking convenience to reproduce color s within costing a great deal of time. How to establish the nonlinear relationship between metal coloring process and specific color formation is still a challenge. Here, we observed thousands of laser-induced Ti-6Al-4V coloring test data in efficient way, based on the color evaluation index of CIE1976 color system and the theory of Multilayer Perceptron algorithm. It is proved that the color produced by the laser is highly matched with the color predicted by training of Multi-layer Perceptron algorithm. The precision difference brought by different algorithm strategies is compared, attempted to find the algorithm strategy that is capable of predicting color formation with high accuracy. This study provides a feasible method for the application of laser coloring to the industrial field. © 2023, The Authors. All rights reserved.

关键词： Neural networks

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福建近海漂移物漂移轨迹分析及模拟

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厦门大学学报（自然科学版） 2023年第3期62卷 435-443页

作者：曾银东郭民权方许闻江毓武郑祥靖中国海洋大学海洋与大气学院山东青岛266100 福建省海洋预报台福建福州350003 厦门大学海洋与地球学院福建厦门361102

浮子漂移实验能够捕捉海域表面海流的特征,为提高海上漂移物漂移轨迹预测模式的预测精度提供改进依据.通过在福建近海的浮子漂移实验,选取兴化湾、厦门湾与湾外近岸海域浮子的运动轨迹,对研究海域的表面流进行分析,并在业务化三维海洋... 详细信息

浮子漂移实验能够捕捉海域表面海流的特征,为提高海上漂移物漂移轨迹预测模式的预测精度提供改进依据.通过在福建近海的浮子漂移实验,选取兴化湾、厦门湾与湾外近岸海域浮子的运动轨迹,对研究海域的表面流进行分析,并在业务化三维海洋动力模型基础上,结合拉格朗日粒子追踪法,建立了福建近海海上目标物漂移轨迹预测模式,利用浮子漂移实验对漂移模式在福建近海的适用性进行了验证.研究结果表明:湾内浮子运动主要受潮流作用,呈现往复运动的趋势;湾外浮子运动主要由外海环流驱动,有沿等深线迁移趋势,并受到潮过程作用局部形成回流.而本研究构建的福建近海海上目标物漂移轨迹预测模式的模拟结果与浮子漂移结果基本一致,并且相对于湾内的轨迹预测,湾外的模拟有更高的可信度.同时浮子漂移实验还表明FES潮流模型在台湾海峡有较高的准确度,而湾内欠佳.

关键词：福建近海浮子漂移实验拉格朗日粒子追踪法漂移轨迹预测

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西藏仁布地区上三叠统复理石物源分析

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高校地质学报 2011年第2期17卷 220-230页

作者：徐文礼李祥辉王尹曾庆高孙勇尼玛次仁成都理工大学沉积地质研究院成都610059 南京大学地球科学系南京210093 西藏自治区地质调查院一分院堆龙德庆850000

运用砂岩碎屑组分、古水流、微量和稀土元素方法对西藏南部仁布地区上三叠统朗杰学群和涅如组的物源进行了分析。碎屑组分和地球化学研究结果显示,盆地中的碎屑物源主要来自再旋回造山带,部分来自造山之前的混合区,少数源于大陆基底,且... 详细信息

运用砂岩碎屑组分、古水流、微量和稀土元素方法对西藏南部仁布地区上三叠统朗杰学群和涅如组的物源进行了分析。碎屑组分和地球化学研究结果显示,盆地中的碎屑物源主要来自再旋回造山带,部分来自造山之前的混合区,少数源于大陆基底,且物源区蕴含有造山前的大陆边缘岛弧过程;物源区母岩主要为沉积再旋回和后太古代再旋回沉积物;古水流测量分析表明,朗杰学群和涅如组的物源可能均来自北边,但前者物源偏于东北方向,后者物源偏于西北方向,且前者较后者离物源区相对较近,符合现今二者地层的分布特征。这些认识为研究区上三叠统复理石可能来自北部甚至拉萨地块的观点提供了新的支持。

关键词：物源分析碎屑成分岩石地球化学古水流上三叠统仁布西藏南部

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Erratum to“Probing the Interfacial Forces and Surface Interaction Mechanisms in Petroleum Production Processes”[Engineering 18(2022)49-61]

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Engineering 2023年第3期22卷 233-233页

作者： Diling Yang xuwen Peng Qiongyao Peng Tao Wang Chenyu Qiao Ziqian Zhao Lu Gong Yueliang Liu Hao Zhang Hongbo zeng Department of Chemical and Materials Engineering University of AlbertaEdmontonAB T6G 1H9Canada College of Petroleum Engineering China University of PetroleumBeijing 102249China

In Ref.[1],Eq.(8)has a typo,the following replacement should be done.γ_(bb)/2rδ/δr(rδ(r,t)/δr=2γ_(bb)/R_(bb)-Þ(t,t)-Ⅱ[h[r,t)](bubble=drop-bubble=drop)The publisher regrets an error in the original–article,and the sentence that explained the equation“Eqs.(8)–(10)show the augmented Young–Laplace equation for the interactions of gas bubbles or liquid droplets in different configurations,where Rb is the bubble/drop radius,Rp is the particle radius,Rbp=(1/Rb+1/Rp)1.

关键词： bubble radius equation

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Adhesive Coacervates: Adhesive Coacervates Driven by Hydrogen-Bonding Interaction (Small 43/2020)

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Small 2020年第43期16卷

作者： Qiongyao Peng Jingsi Chen Zicheng zeng Tao Wang Li Xiang xuwen Peng Jifang Liu Hongbo zeng Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta T6G 1H9 Canada The Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 510700 China

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