Probing the impact of metal impurities on the structure, reactivity, and transformation of biogenic manganese oxides

探讨金属杂质对生物锰氧化物的结构、反应性和转化的影响

• 批准号: 1710285
• 负责人: Yuanzhi Tang
• 金额: $ 33.06万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1710285&HistoricalAwards=false
• 关键词: Probing; impact; metal; impurities; structure

This project is funded by the Environmental Chemical Sciences (ECS) Program of the Chemistry Division. Professor Yuanzhi Tang of the Georgia Institute of Technology investigates the impact of metal impurities on the structure and reactivity of manganese (Mn) oxides. Manganese oxides exist in nearly all environmental settings. They have significant influence on the biogeochemical cycling of metals, nutrients, and organic compounds in these cycles manganese is transferred between living systems and the environment. It also studies the transformation pathways of Mn oxides produced by living organisms under environmentally-relevant conditions. The project includes developing high school curriculum materials that integrate earth and environmental sciences, chemistry, and biology. It promotes the next generation of scientists from underrepresented groups and with different cultural backgrounds and research experiences. Professor Tang and her students develop community outreach activities to showcase mineral and mineral properties to the general public. This task is conducted annually in March during the Atlanta Science Festival, Georgia?s biggest science fair that showcases science and technologyto the general public. Specifically, the research group puts on a ?rock show? where the general public, students, and science educators have the opportunities to learn mineral properties with hands-on demonstrations of parameters such as color, hardness, texture, and chemical alteration. They also develop a kit for the demonstration of biomineralization and mineral-facilitated environmental remediation such as microscope and visual observation of microbial Mn oxidation and color changes during chemical reactions.Manganese oxides play an important role in the biogeochemical cycling of many important nutrients and contaminants. Still, much remains unknown about the influence of ubiquitous metal impurities on the structure, reactivity, and transformation pathways of biogenic Mn oxides. This knowledge is needed to develop accurate predictive models for understanding the fate of contaminants and nutrients in the natural environment. This project systematically examines the changes in biogenic Mn oxide reactivities when they are formed in the presence of common metal ions. The processes of geological and environmental interest include sorption of cations and anions, and abiotic reductive transformation induced by Mn(II). Controlled laboratory studies lead to predictive insight into the relative importance of different metal ions in controlling Mn oxide reactivity.

该项目由化学部环境化学科学(ECS)计划资助。佐治亚理工学院的唐元志教授研究了金属杂质对锰(锰)氧化物的结构和反应活性的影响。锰氧化物几乎存在于所有环境环境中。它们对金属、营养物质和有机化合物的生物地球化学循环有重大影响。在这些循环中，锰在生命系统和环境之间转移。它还研究了在与环境相关的条件下生物产生的锰氧化物的转化途径。该项目包括开发整合了地球和环境科学、化学和生物的高中课程材料。它促进来自代表性不足的群体、具有不同文化背景和研究经验的下一代科学家。唐教授和她的学生开展社区推广活动，向公众展示矿物和矿物属性。这项任务每年三月在佐治亚州的亚特兰大科学节期间进行，S是向公众展示科学和技术的最大的科学博览会。具体地说，研究小组上演了一场摇滚表演？在这里，普通公众、学生和科学教育工作者有机会通过实际操作演示颜色、硬度、质地和化学蚀变等参数来学习矿物属性。他们还开发了一套用于演示生物矿化和矿物促进的环境修复的试剂盒，如显微镜和目视观察微生物在化学反应中的氧化和颜色变化。锰氧化物在许多重要营养物质和污染物的生物地球化学循环中发挥着重要作用。然而，关于普遍存在的金属杂质对生物成因锰氧化物的结构、反应活性和转化途径的影响，仍有许多未知之处。需要这些知识来开发准确的预测模型，以了解污染物和营养物质在自然环境中的命运。这个项目系统地研究了在常见金属离子存在下形成生物氧化锰时，它们的反应性的变化。具有地质和环境意义的过程包括阳离子和阴离子的吸附和锰(II)诱导的非生物还原转化。对照实验室研究导致对不同金属离子在控制氧化锰反应性方面的相对重要性的预测性洞察。

项目成果

Effect of Zn coprecipitation on the structure of layered Mn oxides

• DOI: 10.1016/j.chemgeo.2018.05.044
• 发表时间: 2018-08
• 期刊: Chemical Geology
• 影响因子: 3.9
• 作者: Shiliang Zhao;Qian Wang;Jingying Sun;O. Borkiewicz;Rixiang Huang;E. M. Saad;Benjamin P. Fields

Zinc Presence during Mineral Formation Affects the Sorptive Reactivity of Manganese Oxide

• DOI: 10.3390/soilsystems2020019
• 发表时间: 2018-04
• 作者: Shiliang Zhao;Chenning Li;Pan Liu;Rixiang Huang;E. M. Saad;Yuanzhi Tang

Manganese Oxide Catalyzed Hydrolysis of Polyphosphates

• DOI: 10.1021/acsearthspacechem.9b00220
• 发表时间: 2019-10
• 期刊: ACS Earth and Space Chemistry
• 影响因子: 3.4
• 作者: B. Wan;Rixiang Huang;J. Diaz;Yuanzhi Tang

Effect of Zn(II) coprecipitation on Mn(II)-induced reductive transformation of birnessite

• DOI: 10.1016/j.chemgeo.2018.05.031
• 发表时间: 2018-08
• 期刊: Chemical Geology
• 影响因子: 3.9
• 作者: Shiliang Zhao;Yaneira A. González-Valle;E. Elzinga;E. M. Saad;Yuanzhi Tang

Effect of Manganese Oxide Aging and Structure Transformation on the Kinetics of Thiol Oxidation

• DOI: 10.1021/acs.est.8b03993
• 发表时间: 2018-11-20
• 期刊: ENVIRONMENTAL SCIENCE & TECHNOLOGY
• 影响因子: 11.4
• 作者: Eitel, Eryn M.;Zhao, Shiliang;Taillefert, Martial
• 通讯作者: Taillefert, Martial