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

这项拟议的研究将评估向海水中添加氢氧化物的效果、影响和好处，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。研究问题与行星氢的创新低能量、成本效益高的工艺有关，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。将氢氧化物添加到表层海洋中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，创造了海洋中巨大的碳酸氢盐和碳酸盐离子储藏库。增加的碱度还有助于扭转二氧化碳吸收造成的海洋酸化，有利于包括商业上重要的贝类在内的酸敏感生物。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理解。在商业孵化室中用沿海浮游植物和牡蛎幼体进行的实验将检查生物反应。该项目还将涉及现场实验和建模，以开发和测试vmonitor方法，这些方法可用于验证碱度添加导致大气二氧化碳吸收的预期量。总体而言，这些结果将有助于开发行星氢的新型联产工艺，该工艺可产生氢氧化物和清洁的氢(H2)--一种宝贵的燃料和原料。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、行星氢气公司、加拿大渔业和海洋科学家、气候工作基金会、蓟绒基金会和一个商业牡蛎孵化场--L的étang Ruisseau Bar。该小组包括来自德国GeOMAR Helmholtz海洋研究中心、基尔和美国斯克里普斯海洋研究所的专家。

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).