CAREER: Interfacial Reactions Affecting Heavy Metal Fate and Transport: An Integrated Research and Education Plan

0546219 Giammar 虽然大多数关于固定化机制的先前工作集中于吸附，但表面沉淀和共沉淀是在很大程度上仍未探索的关键机制。该研究将推动异相成核和固溶过程在环境系统中的应用。对富含铀和铅的纳米颗粒的研究将有助于环境纳米科学和纳米技术的新生领域。在PI结合宏观，微观和分子尺度技术来阐明固体-水界面反应机制的经验的基础上，已经建立了新的合作，以利用强大的光谱技术库来追求进一步的机理见解。通过将污染物的固定化机理研究与污染物的再活化研究相结合，该工作填补了基础水化学研究与应用环境修复之间的差距。除了对污染场地管理的直接益处外，新的机理信息还将有益于水处理和腐蚀过程的研究。综合研究和教育计划将覆盖各种受众，并通过征聘和外联扩大代表性不足群体的参与。 针对中学生和社区的水质和可持续性教育计划超越了大学。该项目通过交叉列出课程，组建多学科研究团队以及与化学家和地球科学家合作，发展环境工程与其他学科之间的关系，扩大了研究和教育的基础设施。科学成果将被广泛传播，以促进环境工程，水地球化学和界面科学领域。将向环境工程学术界提供以问题为基础的学习项目和综合水化学学习单元的新课程倡议。提高对铅和铀固定机制的认识，通过改进场地管理和补救战略，使社会受益。环境工程专业学生的教育和对大学预科学生的推广将具有延伸到未来的社会效益，特别是当学生对终身学习充满热情时。

0546219 Giammar While most prior work on immobilization mechanisms has focused on adsorption, surface precipitation and co-precipitation are crucial mechanisms that remain largely unexplored. The research will advance the application of heterogeneous nucleation and solid solution processes to environmental systems. Research on uranium- and lead-rich nanoparticles will contribute to the nascent fields of environmental nanoscience and nanotechnology. While building on the PIs experience combining macroscopic, microscopic and molecular-scale techniques to elucidate reaction mechanisms at the solid-water interface, new collaborations have been established to pursue further mechanistic insights with a powerful arsenal of spectroscopic techniques. By integrating the study of immobilization mechanisms with investigations of contaminant remobilization, the work bridges the gap between fundamental aquatic chemistry research and applied environmental remediation. In addition to the direct benefits to contaminated site management, the new mechanistic information will also benefit research on water treatment and corrosion processes.Broader Impacts. The integrated research and education plans will reach a diverse audience and broaden the participation of underrepresented groups through recruiting and outreach. Educational programs on water quality and sustainability for middle school students and the community reach beyond the university. The project expands the infrastructure for research and education by developing relationships between environmental engineering and other disciplines through the cross-listing of courses, formation of multidisciplinary research teams, and collaboration with chemists and earth scientists. The scientific results will be broadly disseminated to contribute to the fields of environmental engineering, aqueous geochemistry, and interfacial science. New course initiatives of problem-based learning projects and integrated aquatic chemistry learning units will be made available to the environmental engineering academic community. Advancing the understanding of lead and uranium immobilization mechanisms benefits society by enabling improved site management and remediation strategies. The education of environmental engineering students and outreach to pre-college students will have societal benefits extending into the future, especially when students develop a passion for lifelong learning.