Alkalinity addition to coastal seawater in conjunction with green hydrogen generation: chemical and biological impacts and verification of CO2 uptake.

拟议的研究将评估向海水中添加氢氧化物的功效、影响和益处，研究它如何影响海洋化学、二氧化碳吸收和选定的海洋生物群。这些研究问题与Planetary Hydrogen的创新低能耗，具有成本效益的工艺有关，该工艺使用可再生能源电解盐溶液，产生氢氧根离子和氢气。将氢氧化物添加到海洋表面将捕获大气中的CO2并将其转化为溶解的碳酸氢盐，模拟自然风化反应，这些反应创造了海洋的大量碳酸氢盐和碳酸盐离子库。增加的碱度还可以帮助逆转由二氧化碳吸收引起的海洋酸化，使包括商业上重要的贝类在内的酸敏感生物受益。该项目将涉及实验室实验，以确认对碱度添加的化学反应的理论理解。用沿海浮游植物和牡蛎幼虫在商业孵化场进行的实验将研究生物反应，该项目还将涉及实地实验和建模，以便开发和测试可用于核实碱度增加导致大气CO2吸收量达到预期水平的监测方法。总的来说，这些结果将有助于Planetary Hydrogen新型联产工艺的开发，该工艺可产生氢氧化物和清洁氢（H2）-一种有价值的燃料和原料。它将提供关键信息，指导行星氢在新斯科舍省的第一个试点工厂的建立。我们的多学科合作伙伴关系汇集了达尔豪西大学的研究人员，行星氢公司，加拿大渔业和海洋科学家、气候工程基金会、李斯特当基金会和一个商业牡蛎孵化场，L 'Étang Ruisseau酒吧。该小组包括来自德国GEOMAR Helmholtz海洋研究中心基尔和斯克里普斯海洋学研究所（美国）的专家。

The proposed research will assess the efficacy, impacts and benefits of adding hydroxide to seawater, examining how it affects ocean chemistry, CO2 uptake, and selected marine biota. The research questions arise in connection with Planetary Hydrogen's innovative low-energy, cost-effective process which uses renewable energy to electrolyze a saline solution, producing hydroxide ions and hydrogen gas. Adding the hydroxide to the surface ocean will capture atmospheric CO2 and convert it to dissolved bicarbonate, mimicking natural weathering reactions that have created the ocean's massive bicarbonate and carbonate ion reservoir. The added alkalinity also can help reverse ocean acidification caused by CO2 uptake, benefiting acid-sensitive organisms that include commercially important shellfish. The project will involve laboratory experimentation to confirm theoretical understanding of the chemical response to alkalinity addition. Experiments with coastal phytoplankton and with oyster larve in a commercial hatchery will examine biological responses.The project will also involve field experiments and modelling in order to develop and test vmonitoring approaches that can be used to verify that the alkalinity addition results in the expected amount of atmospheric CO2 uptake. Overall, the results will contribute to the development of Planetary Hydrogen's novel co-production process, which generates hydroxide and clean hydrogen (H2) - a valuable fuel and feedstock. It will provide key information to guide establishment of Planetary Hydrogen's first pilot plant in Nova Scotia.Our multidisciplinary partnership brings together Dalhousie University researchers, Planetary Hydrogen Inc., Fisheries and Oceans Canada scientists, the ClimateWorks Foundation, the Thistledown Foundation, and a commercial oyster hatchery, L'Étang Ruisseau Bar. The team includes experts from Germany's GEOMAR Helmholtz Centre for Ocean Research Kiel and the Scripps Institution of Oceanography (USA).