A potential role of the negative emission of carbon dioxide in solving the climate problem

Ryaboshapko, A. G.; Revokatova, A. P.

doi:10.3103/s106837391507002x

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…The global emission of greenhouse gases, such as CO 2 , continues to rise by~3% each year [1]. Higher atmospheric concentrations of greenhouse gases lead to surface warming of the land and oceans [2].…”

Section: Introductionmentioning

confidence: 99%

“…Higher atmospheric concentrations of greenhouse gases lead to surface warming of the land and oceans [2]. According to computational results based on climate models, the average global value of the temperature rise of +2 • C will be surpassed when the concentration of CO 2 reaches 550 ppm [1]. If current trends are kept, the CO 2 concentration will reach this threshold value by 2050.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Surface Modification of TiO2-Based Photocatalysts for the Conversion of CO2

2020

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Among all greenhouse gases, CO2 is considered the most potent and the largest contributor to global warming. In this review, photocatalysis is presented as a promising technology to address the current global concern of industrial CO2 emissions. Photocatalysis utilizes a semiconductor material under renewable solar energy to reduce CO2 into an array of high-value fuels including methane, methanol, formaldehyde and formic acid. Herein, the kinetic and thermodynamic principles of CO2 photoreduction are thoroughly discussed and the CO2 reduction mechanism and pathways are described. Methods to enhance the adsorption of CO2 on the surface of semiconductors are also presented. Due to its efficient photoactivity, high stability, low cost, and safety, the semiconductor TiO2 is currently being widely investigated for its photocatalytic ability in reducing CO2 when suitably modified. The recent TiO2 synthesis and modification strategies that may be employed to enhance the efficiency of the CO2 photoreduction process are described. These modification techniques, including metal deposition, metal/non-metal doping, carbon-based material loading, semiconductor heterostructures, and dispersion on high surface area supports, aim to improve the light absorption, charge separation, and active surface of TiO2 in addition to increasing product yield and selectivity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Surface Modification of TiO2-Based Photocatalysts for the Conversion of CO2

2020

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“…Enhanced ocean uptake of CO 2 can occur through three main pathways, (a) creating and restoring ‘blue carbon’ biological sinks such as mangrove swamps and other coastal ecosystems such as seagrass beds (technical potential: <1 Gt CO 2 e year −1 ; estimated from Froehlich et al, 2019), (b) ocean fertilization, for example, with iron, to increase surface primary production, which increases the delivery of fixed CO 2 into the deep sea (technical potential: 1–3 Gt CO 2 e year −1 ; Minx et al, 2018; Ryaboshapko & Revokatova, 2015) and (c) increasing the alkalinity of seawater through seeding the ocean with natural or artificial alkaline materials to sequester CO 2 as bicarbonate and carbonate ions (HCO 3 ‐, CO 3 2− ) in the ocean (technical potential: 1–100 Gt CO 2 e year −1 ; Fuss et al, 2018) – similar to enhancing mineral weathering (see Section 2.3.7). Additional approaches include the electrochemical splitting of water into hydrogen (H+) and hydroxide (OH‐) ions, which can be used through various processes to capture CO 2 or to increase alkalinity of seawater.…”

Section: Climate Change Mitigation Actions That Risk Harming Biodiver...mentioning

confidence: 99%

How do we best synergize climate mitigation actions to co‐benefit biodiversity?

Smith

Arneth

Barnes

et al. 2022

Global Change Biology

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A multitude of actions to protect, sustainably manage and restore natural and modified ecosystems can have co‐benefits for both climate mitigation and biodiversity conservation. Reducing greenhouse emissions to limit warming to less than 1.5 or 2°C above preindustrial levels, as outlined in the Paris Agreement, can yield strong co‐benefits for land, freshwater and marine biodiversity and reduce amplifying climate feedbacks from ecosystem changes. Not all climate mitigation strategies are equally effective at producing biodiversity co‐benefits, some in fact are counterproductive. Moreover, social implications are often overlooked within the climate‐biodiversity nexus. Protecting biodiverse and carbon‐rich natural environments, ecological restoration of potentially biodiverse and carbon‐rich habitats, the deliberate creation of novel habitats, taking into consideration a locally adapted and meaningful (i.e. full consequences considered) mix of these measures, can result in the most robust win‐win solutions. These can be further enhanced by avoidance of narrow goals, taking long‐term views and minimizing further losses of intact ecosystems. In this review paper, we first discuss various climate mitigation actions that evidence demonstrates can negatively impact biodiversity, resulting in unseen and unintended negative consequences. We then examine climate mitigation actions that co‐deliver biodiversity and societal benefits. We give examples of these win‐win solutions, categorized as ‘protect, restore, manage and create’, in different regions of the world that could be expanded, upscaled and used for further innovation.

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“…General conclusion is that, out of all weather parameters, temperature has the greatest impact on the intensity of air pollution with CO 2 (Ryaboshapko and Revokatova, 2015), whereby the values of the other parameters change depending on the on the season (Shahgedanova, Burt, and Davies, 1999).…”

Section: Introductionmentioning

confidence: 99%