244 results for group: journal-article

Combining biochar and basanite rock powder enhances carbon dioxide removal by carbonate alkalinity production

Johannes Meyer Zu Drewer, Maria-Elena Vorrath, Thorben Amann, Jens Hartmann, Maria Ansari, Marcela Cárcamo Pérez, Nikolas Hagemann ABSTRACT: The combination of enhanced rock weathering (ERW) with pyrogenic carbon capture and storage (PyCCS) has been proposed to harness synergistic effects on carbon dioxide removal (CDR). This can be facilitated by co-application of silicate rock powder and biochar or co-pyrolysis of rock powder and biomass to produce rock-enhanced (RE-)biochar. While it is well documented that co-pyrolysis of biomass and silicate rock does not affect the carbon yield nor the aromaticity of RE-biochar, the effect of co-pyro...

Investigating the effects of co-applied basalt and biochar on carbon removal efficiency and grain yield in rice paddy

Xueliu Gong, Jiarong Wu, Jingsong Qin, Jinkai Zhao, Kai Zhu, Chenglong Ye, Shaopan Xia, Jufeng Zheng, Wenkun Qie, Lianqing Li, Zi-Bo Li, Rongjun Bian ABSTRACT: Enhanced silicate weathering (ESW) has shown promise for carbon dioxide removal (CDR) in dryland agriculture, yet its effectiveness in flooded rice paddies, particularly regarding the CDR pathways and microbial interactions, remains poorly understood. In this study, we quantified CDR in rice paddy amended with basalt and/or biochar. Basalt applied at 36 t ha−1 sequestered ∼11.3 t CO2 ha−1 through carbonate formation and increased rice yield by 20.7%. Co-applying with 18 t ha−1 ...

Enhanced rock weathering in acid mine drainage systems: Field evidence and passive treatment implications

Htut San Hkaung, Naito Yamashita, Nono Kimotsuki, Fugo Nakamura, Frances Chikanda, Ryosuke Kikuchi, Yoko Ohtomo, Tsubasa Otake, Tsutomu Sato ABSTRACT: Despite basalt-based Enhanced Rock Weathering (ERW) showing promise in croplands, identifying alternative application sites is crucial for scaling carbon dioxide removal (CDR) and maximizing co-benefits. This study investigated acid mine drainage (AMD) systems as potential ERW sites, emphasizing the use of mining waste rock as reactive material. AMD environments are naturally acidic and characterized by continuous flow, conditions that accelerate mineral dissolution and enhance ERW effectivene...

Biodiversity implications of land-intensive carbon dioxide removal

Ruben Prütz, Joeri Rogelj, Gaurav Ganti, Jeff Price, Rachel Warren, Nicole Forstenhäusler, Yazhen Wu, Andrey Lessa Derci Augustynczik, Michael Wögerer, Tamás Krisztin, Petr Havlík, Florian Kraxner, Stefan Frank, Tomoko Hasegawa, Jonathan C. Doelman, Vassilis Daioglou, Florian Humpenöder, Alexander Popp, Sabine Fuss ABSTRACT: Pathways consistent with global climate objectives typically deploy billions of tonnes of carbon dioxide removal (CDR) from land-intensive methods such as forestation and bioenergy with carbon capture and storage. Such large-scale deployment of land-intensive CDR may have negative consequences for biodiversity. Here ...

Multiple Lines of Evidence Reveal Rapid, Seasonal Watershed Responses to Enhanced Weathering

Fengchao Sun, Robert Rioux, Tim Suhrhoff, Wyatt Tatge, Boriana Kalderon-Asael, Quinn Zacharias, William Miller-Brown, Aaron MacDonald, Esmeralda Garcia, Jamie Shanley, Peter Raymond, Noah Planavsky, James Saiers ABSTRACT: Enhanced rock weathering (ERW) is a natural carbon dioxide removal (CDR) approach that captures CO2 by accelerating silicate weathering using crushed rocks. A major question on the efficacy of ERW is how fast and efficient it is at transporting the products of weathering to drainage networks, and ultimately the ocean. Using a novel whole watershed experiment, we report multiple lines of evidence of rapid and pronounced streamwater ...

Does the release of toxic metals due to subsurface CO2 storage in basalts pose an environmental hazard?

Deirdre E. Clark, Iwona M. Galeczka, Sigurður R. Gíslason, Sandra Ó. Snæbjörnsdóttir, Ingvi Gunnarsson, Eric H. Oelkers ABSTRACT: Carbon dioxide storage through the carbonation of subsurface basaltic rocks is currently being explored to limit carbon emissions to the atmosphere. Basaltic rocks, however, contain trace and toxic metals that could potentially be mobilized by the carbonation process. This study reports the degree to which selected trace and toxic metals were mobilized during CarbFix1 and CarbFix2 projects. CarbFix1 injected 175 tons of CO2-charged water followed by 73 tons of CO2/H2S-charged water into basalts at 35 °C, whereas ...

Calcium-rich parent materials enhance multiple soil functions and bacterial network complexity

Peilei Hu, Wei Zhang, Wolfgang Wanek, Ji Chen, Dan Xiao, Xinyu Hou, Juan Li, Hongsong Chen, Jun Xiao, Xionghui Liao, Xionghui Liao, Xionghui Liao, Tiangang Tang, Hanqing Wu, Hanqing Wu, Kelin Wang   ABSTRACT: Parent material shapes soil properties, yet its effects on soil functions and microbial networks remain unclear. Here we investigate these relationships using a large-scale field survey comparing soils derived from calcium-rich carbonate rocks and calcium-poor clastic rocks, complemented by a microcosm experiment. Soils from calcium-rich parent materials contained 33% higher organic carbon, 58% higher total nitrogen, and 55% higher total ...

Direct In Situ Measurement of Alkalinity Export for Real-Time Enhanced Weathering MRV

Andrew Muth, Jonte Boysen, Pascal Michel ABSTRACT: Accurate quantification of alkalinity export from the near-field zone remains a key bottleneck for monitoring, reporting, and verification (MRV) of carbon dioxide removal (CDR) through Enhanced Weathering (EW). Here we validate the Everest Pulsar, a field-deployable alkalinity sensor that accumulates total alkalinity (TA) using a weak acid ion-exchange resin and transduces resin saturation into a digital, in situ measurement. In a 7-day continuous-flow soil column experiment (10 no-soil, 5 soil units), the sensor quantitatively retained incoming alkalinity, with capture efficiencies of 98.9% ...

Long-term carbon dioxide removal potential from the application of wood biochar and basanite rock powder in sandy soil using the LiDELSv2 process-based modeling approach

Mikita Maslouski, Maria Ansari, Susanne E Hamburger, Johannes Meyer zu Drewer, Nikolas Hagemann, Annette Eschenbach, Christian Beer, Joscha N Becker, Claudia I Kammann, Maria-Elena Vorrath, Philipp Porada ABSTRACT: The rise in atmospheric carbon dioxide (CO2) concentrations requires scalable and effective carbon dioxide removal (CDR) strategies. pyrogenic carbon capture and storage relies on the pyrolysis of biomass and the non-oxidative use of biochar, e.g. in soils. Enhanced rock weathering (ERW) captures CO2 by forming dissolved bicarbonate. In addition to CDR, both methods may offer soil improvement as a co-benefit. However, their interaction ...

An Updated Framework and Signal-to-Noise Analysis of Soil Mass Balance Approaches for Quantifying Enhanced Weathering on Managed Lands

Tim Jesper Suhrhoff, Tom Reershemius, Jacob S. Jordan, Shihan Li, Shuang Zhang, Ella Milliken, Boriana Kalderon-Asael, Yael Ebert, Rufaro Nyateka, Jake T. Thompson, Christopher T. Reinhard, Noah J. Planavsky ABSTRACT: Enhanced weathering is a promising approach for removing carbon dioxide from the atmosphere at scale while improving agricultural yields. However, accurately quantifying carbon dioxide removal in the field is critical for this approach to scale, particularly given that nearly all the current deployment activity caters to the voluntary carbon market. Here, we present an updated framework and a signal-to-noise analysis for using soil-b...