Global Research Progress and Trends on Critical Metals: A Bibliometric Analysis

Abstract

In the perspective of observing the latest worldwide and European strategies toward green transition and delivering a secured access to local resources, the objective of this study was to analyze the research progress on critical materials and, more specific, critical metals and review the future research hot-topics for critical metals. Consequently, a bibliometric analysis for the assessment of the current state of the art research, future trends as well as evolution through time of the critical metals research was performed in the present work. The study included four phases of work: (i) search string selection, (ii) data collection, (iii) data processing, and (iv) data interpretation. A total of 433 publications on critical metals were collected from Scopus database between 1977 and 2023, with an increasing yearly trend and a burst in 2013. The data retrieved showed a significant increase in publications related to the topic in the last 10 years. The results show that research interest is concentrated around six critical areas: (i) bioleaching as an important process of critical metal recovery, (ii) circular economy concepts and recovery of critical metals by urban mining from e-waste, (iii) resource recovery from waste landfills as urban mines, (iv) targeted studies on various critical elements (copper, zinc, gallium, silver, lithium), (v) rare elements as industry vitamins and, (vi) coal deposits and coal ashes as an alternative source of critical metals. This analysis could provide important guidance for further directions on the development of research for recovery of critical metals.

Karbon Piyasası: Yeni ve Gelecek Araştırmalar (Carbon Market: Recent and Future Research)

“…The carbon market is also a reflection of ideas from economics, namely a fear that bad management of Earth's resources could have a negative impact on or even limit long-term economic growth, as well as an awareness of how market mechanisms could be used to resolve externalities (Calel, 2011). Su, et al (2023) conducted a bibliometric analysis on the topic of carbon finance. The analysis indicates variations in carbon funding based on keyword analysis, including carbon capture, economic growth, carbon sequestration, financial development, modeling, and carbon price predictions.…”

“…In addition to the research carried out by Su et al, (2023), this study also carried out a bibliometric analysis concerning carbon in the context of the economic area, namely the carbon market. Within the fields of economics, business, management, and finance, the purpose of this study is to identify the research trends that are occurring in carbon markets.…”