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、影响和效益，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。研究问题与planet Hydrogen创新的低能耗、低成本工艺有关，该工艺使用可再生能源电解盐溶液，产生氢氧化物离子和氢气。向海洋表面添加氢氧化物将捕获大气中的二氧化碳并将其转化为溶解的碳酸氢盐，模拟自然风化反应，这种反应产生了海洋中大量的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，有利于酸敏感的生物，包括商业上重要的贝类。该项目将包括实验室实验，以确认对碱度添加的化学反应的理论认识。对沿海浮游植物和商业孵化场牡蛎幼体的实验将检验生物反应。该项目还将涉及实地实验和建模，以开发和测试可用于验证添加碱度是否会导致预期的大气二氧化碳吸收量的监测方法。总的来说，这些结果将有助于行星氢的新型联产工艺的发展，该工艺可以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，以指导在新斯科舍省建立行星氢的第一个试点工厂。我们的多学科合作伙伴关系汇集了达尔豪斯大学的研究人员、行星氢公司、加拿大渔业和海洋科学家、气候工作基金会、Thistledown基金会和商业牡蛎孵化场L'Étang Ruisseau Bar。该小组包括来自德国基尔GEOMAR亥姆霍兹海洋研究中心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).