EFRI ELiS : Carbon Sequestration and Coastal Resilience Through 3D Printed Reefs

天然珊瑚礁及其相连的生态系统在封存二氧化碳和保护沿海地区免受飓风、洪水等气候变化引起的极端事件的影响方面发挥着至关重要的作用。虽然在过去几十年中已建造了各种材料的人工鱼礁，但这些材料中的大多数对环境的影响和寿命仍然令人担忧。为了找到解决方案，该项目将研究使用自我修复的碳螯合复合材料建造人工鱼礁，这将能够储存二氧化碳，同时保护沿海地区免受海平面上升和极端洪水的影响。该项目的成功完成将通过确定一种新的途径来保护沿海社区免受气候变化的直接危害，并有助于减少温室气体排放，从而造福社会。 通过对学生的教育和培训，包括对德克萨斯大学阿灵顿分校的三名研究生、德克萨斯农工大学金斯维尔分校的一名研究生和一名本科生、德克萨斯大学达拉斯分校的一名研究生以及德克萨斯农工大学的一名研究生的指导，将为社会带来额外的好处。该项目旨在建立一种新的途径来设计活的工程珊瑚礁，以增强海岸弹性、储存碳和恢复栖息地。研究目标是：（i）研究自修复负碳复合材料的过程-结构-性能关系，以获得最大的碳封存能力，并在海水中具有上级寿命;（ii）了解负碳复合材料、表面藻类和微生物生物膜之间的相互作用，以确保钙质生物在工程化珊瑚礁上定居和生长;（iii）通过实验室实验研究3D打印工程珊瑚礁的波浪-结构相互作用，以确定珊瑚礁的最佳形状和空隙率，从而实现足够的波浪衰减，同时为海洋生物提供栖息地;以及（iv）进行海岸水动力学建模，以确定用于部署的最佳地球物理设置（位置、尺寸、方向），在该最佳地球物理设置处，工程化的珊瑚礁结构将产生可量化的洪水减少，以响应内陆水文变化、风暴潮、地面沉降和海平面上升的复合危害。除了研究之外，项目团队还将通过该项目所涉及的STEM主题研讨会为高中生提供实践学习机会，包括碳封存，3D打印，海洋生物学和沿海洪水建模。该项目团队还将通过与大自然保护协会和德克萨斯海洋赠款合作的多个研讨会与服务不足的社区进行合作。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Natural reefs and their connected ecosystem play a vital role in sequestering carbon dioxide and in protecting coastal areas from climate change-induced extreme events, such as hurricanes, flooding, etc. Unfortunately, climate change-induced ocean acidification has damaged nearly 40% of the reefs and the dependent ecosystem. While artificial reefs with a wide range of materials have been constructed in the past few decades, the environmental impact and longevity of most of these materials remain concerning. To find a solution, this project will investigate the use of self-healing carbon-sequestering composite materials for artificial reef construction that will enable storage of carbon dioxide while also protecting coastal areas from rising seas and extreme floods. The successful completion of this project will benefit society by identifying a novel pathway to protect coastal communities from the immediate hazards of climate change and contribute to reducing greenhouse gas emissions. Additional benefits to society will be achieved through student education and training, including the mentoring of three graduate students at the University of Texas at Arlington, a graduate and undergraduate student at Texas A&M University-Kingsville, a graduate student at the University of Texas-Dallas, and a graduate student at Texas A&M University.This project aims to establish a novel pathway to design living engineered reefs that will enhance coastal resilience, store carbon, and restore habitat. The research goals are to: (i) investigate the process-structure-property relation of the self-healing carbon-negative composites to attain maximum carbon sequestration capacity with superior longevity in seawater; (ii) understand the interactions across carbon-negative composites, surface algal, and microbial biofilms to ensure the settlement and growth of calcareous organisms on engineered reefs; (iii) investigate wave-structure interactions of 3D-printed engineered reefs via laboratory experiments to identify the optimal shape and void ratios of the reefs that will enable adequate wave attenuation while also providing habitat to marine life; and (iv) perform coastal hydrodynamic modeling to identify the optimal geophysical setup for deployment (location, dimensions, orientation) at which the engineered reef structure would produce quantifiable flood reduction in response to compound hazards of inland hydrologic variations, storm surge, ground subsidence, and sea level rise. In addition to research, the project team will provide hands-on learning opportunities to high school students via workshops on the STEM topics involved in this project including carbon sequestration, 3D printing, marine biology, and coastal flood modeling. The project team will also engage underserved communities through multiple workshops in collaboration with the Nature Conservancy and the Texas Sea Grant.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.