This study investigates the pyrolysis and adsorption properties of biochar derived from coconut shell (BC-CS), rice husk (BC-RH), and cow manure (BC-CM) under varying thermal treatment conditions. Biochar samples were produced at 800 °C with residence times ranging from 0 to 60 min. Their characteristics were analyzed using their Brunauer–Emmett–Teller (BET) surface area, total pore volume, and pore diameter measurements. BC-CM exhibited the highest BET surface area of 263.3 m²/g and a total pore volume of 0.164 cm³/g, while BC-RH and BC-CS showed maximum BET surface areas of 220.62 m²/g and 197.38 m²/g, respectively. Nitrogen adsorption–desorption isotherms revealed distinct microporous and mesoporous structures, with BC-CM demonstrating superior adsorption capacity across all relative pressures. The adsorption kinetics of methylene blue (MB) were examined at initial concentrations of 1 ppm, 5 ppm, and 10 ppm, with varying biochar doses (0.1 g, 0.3 g, and 0.5 g). The results showed that the adsorption rate constant (k) decreased with higher initial MB concentrations, while the equilibrium adsorption capacity (q_e) increased. BC-CM achieved the highest q_e of 2.18 mg/g at 10 ppm and a 0.5 g dose, followed by BC-RH-800-45 (1.145 mg/g) and BC-CS (0.340 mg/g). The adsorption process was well described by a pseudo-second-order kinetic model, indicating chemisorption as the dominant mechanism. Increasing biochar doses improved MB removal efficiency, highlighting the dose-dependent nature of adsorption. These findings underscore the importance of optimizing pyrolysis parameters to enhance biochar’s adsorption performance and identify key factors influencing its effectiveness in environmental applications.

The commons concept has evolved in multiple ways after the publication of Ostrom’s seminal work in 1990, which emphasized the evolution of resource management institutions and the usefulness of self-governance. As we move into the 21^st century, one of the institutional transformations is catalyzed by the emergence of Information and Communication Technology (ICT) as a techno-economic paradigm shift and the epochal creation of a new online social structure. However, there is a lack of understanding about the impact of ICT on common resource management, particularly in urban settings, that is urban commons. This study presents a systematic literature review of ICT-enabled urban commons with particular attention to its application to climate-related issues such as climate mitigation/adaptation in order to improve our collective ability to leverage ICT for building a more sustainable and resilient city. A total of 66 pieces of literature were included in our qualitative synthesis. We analyzed the geographical, categorical, and climate relevance. Subsequently, we used the coupled infrastructure system framework as a system thinking approach to dissect distinct usefulness of ICT-enabled commons in the building of relationships between resource system, resource user, infrastructure, and infrastructure provider to tackle climate-related issues. Our findings identified three key contributions of ICT to innovate climate-resilient solutions: 1) to redefine role of resource user as co-producer, co-designer, and co-monitor; 2) to enable real-time data-driven urban planning; 3) to improve resource efficiency and effectiveness. In other words, in a time of insufficient and limited public resources, the public sector can leverage the power of technology to harness public support and engage non-traditional stakeholders to make cities more sustainable and resilient while allowing policy-making to be big data-driven to tackle new urban problems that cannot be otherwise uncovered without the aid of ICT. The results provide directions to rethink the city based on collective action to diversity modes to govern common resources.

This study asks under what institutional condition or governance structure might the gap between policy and practice be conducive to innovative practices. It examines how social innovations are formed amid gaps between policy and practice to tame a wicked problem and achieve sustainable development. First, data was gathered during the implementation of a livestock wastewater policy in four municipalities in southern Taiwan where livestock wastewater pollution is rampant and presents a wicked problem. Next, the focus narrowed to the governing network, namely metagovernance, ignoring other factors such as the role of the social entrepreneur. The article argues that the gap between policy and practice can be framed as a window of opportunity, with positive connotations for policy implementation innovation. The authors analyze the empirical and showcase how innovations, represented by the heterogeneity of metagovernance, were generated in a recursive manner amid gaps between policy and practice in different localities.

Despite being a limited resource, pollution, poor management, and other drivers like climate change make available water unsuitable and insufficient for human consumption and ecosystem maintenance. Therefore, a transdisciplinary approach is needed for managing this precious resource. The overall aim of this paper is to address water inequalities and improve human well-being using an integrated approach of key informant interviews, hydrological modeling, and the payment of ecosystem services (PES) scheme in Pinglin District, Taiwan. This site is an upstream area of Feicui Reservoir, which protects the downstream tap water supply. Key informant interviews were conducted to identify the gaps in and challenges to water resource management. This was followed by a scenario-based hydrological simulation using a Water Evaluation and Planning (WEAP) tool to project future water quality by the year 2050 (using biochemical oxygen demand and total coliform content as key indicator parameters) and to trace the factors responsible for water pollution. Survey analysis of key informant interviews depicts that this area is facing several challenges, such as lack of water infrastructure, agricultural subsidy, construction restrictions, etc., which cumulatively cause water scarcity in the upstream regions. On the other hand, hydrological simulation results show that population decline and climate change under an RCP 8.5 scenario will have an enormous negative impact on water quality. The concentrations of BOD and E. coli in river water will expand by 110.1% and 117.3%, respectively, by 2050 compared to 2018. Finally, the results of the study suggest that the PES scheme can play a positive role in enabling integrated water resource management. For example construction of a small-scale wastewater treatment plant in the upstream area will reduce the total E. coli concentration by up to 90%. While the initial cost of construction will be taken care of by the government, the operation and management cost of this infrastructure will be covered by people living downstream, who need to pay only $0.10 per year per person. The obtained results should be vital for both the stakeholders and decision-makers in this region.