Against the backdrop of global warming, the carbon trading market is considered as an effective means of emission reduction. With more and more companies and individuals participating in carbon markets for trading, it is of great theoretical and practical significance to help them automatically identify carbon trading investment opportunities and achieve intelligent carbon trading decisions. Based on the characteristics of the carbon trading market, we propose a novel deep reinforcement learning (DRL) trading strategy - Deep Recurrent Q-Network (DRQN). The experimental results show that the carbon allowance trading model based on the DRQN algorithm can provide optimal trading strategies and adapt to market changes. Specifically, the annualized returns for the DRQN algorithm strategy in the Guangdong (GD) and Hubei (HB) carbon markets are 15.43% and 34.75%, respectively, significantly outperforming other strategies. To better meet the needs of the actual implementation scenarios of the model, we analyze the impacts of discount factors and trading costs. The research results indicate that discount factors can provide participants with clearer expectations. In both carbon markets (GD and HB), there exists an optimal discount factor value of 0.4, as both excessively small or large values can have adverse effects on trading. Simultaneously, the government can ensure the fairness of carbon trading by regulating the costs of carbon trading to limit the speculative behavior of participants.
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January 2025
School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, China.
In the chemical vapor deposition (CVD) synthesis of graphene, the surficial chemical state of the metal substrate has exerted key roles in all elemental reaction steps determining the growth mechanism of graphene. Herein, a CO-participated annealing procedure is designed to construct catalytic CuO/Cu sites on Cu foil for the graphene CVD synthesis with CO/CH as carbon sources. These CuO/Cu species can catalyze the CH decomposition and subsequent C─C coupling to form C intermediates for fast growth of monolayer hexagonal graphene domains with a diameter of ≈30 µm within 0.
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January 2025
College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, P. R. China.
Asymmetric carbon-based materials (ACBMs) have received significant attention in scientific research due to their unique structures and properties. Through the introduction of heterogeneous atoms and the construction of asymmetric ordered/disordered structures, ACBMs are optimized in terms of electrical conductivity, pore structure, and chemical composition and exhibit multiple properties such as hydrophilicity, hydrophobicity, optical characteristics, and magnetic behavior. Here, the recent research progress of ACBMs is reviewed, focusing on the potential of these materials for electrochemical, catalysis, and biomedical applications and their unique advantages over conventional symmetric carbon-based materials.
View Article and Find Full Text PDFJ Environ Manage
January 2025
School of Engineering, Hangzhou Normal University, Hangzhou, 311121, China; School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China. Electronic address:
Biomass starvation is common in biological wastewater treatment. As a social trait of microbial community, how quorum sensing (QS) regulated bacterial trade-off through interactions after starvation remains unclear. This study deciphered the mechanism of anaerobic ammonium oxidation (anammox) consortia in response to starvation, including reducing extracellular electron transfer (EET), adenosine 5'-triphosphate (ATP) content and amino acid metabolism.
View Article and Find Full Text PDFJ Environ Manage
January 2025
School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou, 570228, China. Electronic address:
Plastic waste's dual characteristics of "resource" and "pollution" led to the prevalence of trade. The Global Plastic Waste Trade Network (GPWTN) is heterogeneous, and its structure is susceptible to the influence of key countries within it. However, there is a shortage of research on the key countries and trade drivers influencing GPWTN evolution.
View Article and Find Full Text PDFJ Environ Manage
January 2025
Institute of Blue and Green Development, Shandong University, Weihai, 264209, China; Faculty of Finance, City University of Macau, Macao, China. Electronic address:
Owing to critical policy significance, a growing body of literature has been predominantly concentrating on the social welfare benefits brought by green finance (GF) initiatives. However, there is a paucity of research that quantifies the economic costs of GF initiatives on carbon reduction, raising the increasing concerns about the irreconcilable climate-economy trade-offs. To end this, the present study systematically investigates the influence of GF initiatives on the carbon-related marginal abatement cost (MAC) using two competing hypotheses: regulatory versus technical effects.
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