Bibliometric analysis of the evolution of biochar research trends and scientific production
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Bibliometric analysis of the evolution of biochar research trends and scientific production Emna Abdeljaoued1,2 · Mathieu Brulé1,3 · Saida Tayibi1,2 · Dimitris Manolakos3 · Abdallah Oukarroum2 · Florian Monlau4 · Abdellatif Barakat1,2 Received: 25 May 2020 / Accepted: 14 October 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Biochar has caught great attention over the last decade, yielding a large number of publications in a broad range of disciplines. This scientometric study produces a combined qualitative–quantitative assessment of 10,000 publications recorded in the period 2005–2019 in the Web of Science (WoS) database, based on innovative methods and indicators, and focusing in particular on biochar production and valorization pathways. The cumulated number of publications was analyzed with power and logistic models, and the economic indicator CAGR (Compound Annual Growth Rate) for the estimation of future academic output. Mapping of the evolution of academic output revealed the worldwide diffusion of academic production toward many countries and continents. According to the analysis of collaboration networks of most productive countries, the development of academic output may be linked to high levels of international collaboration, as well as the diversity of these networks. Furthermore, the rise of academic output in the African continent may preclude an evolution toward a multipolar academic world. The average number of citations per paper at both author level (number of citations/number of papers) and journal level (total citations/total papers) was found to be a useful indicator of scientific productivity. In particular, academic journals with impact factors as low as 2.5–3 still ranked high on this criterion, revealing their high impact on academic research in the biochar sector. Finally, the analysis of targeted keywords co-occurrences emphasized the diversification of research on biochar applications, from its initial use as soil improver toward engineered biochar for versatile applications.
* Abdellatif Barakat [email protected] 1
INRAE, Agro Institut, IATE, Montpellier University, 34060 Montpellier, France
2
Mohammed VI Polytechnic University (UM6P), 43150 Ben Guerir, Morocco
3
Department of Natural Resources Management and Agricultural Engineering, Agricultural University of Athens (AUA), Iera Odos 75, Athina 118 55, Greece
4
APESA, Pôle Valorisation, Cap Ecologia, 64230 Lescar, France
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Graphic abstract
Keywords Biochar · Pyrolysis · Valorization · Keyword analysis · Literature List of symbols a Arbitrary constant AGR Annual growth rate b Arbitrary constant CAGR Compound Annual Growth Rate GS Google Scholar IF Impact factor Nx Number of publications produced during the year x Nx − 1 Number of publications produced during the year x−1 QS Query string (keyword combination) R Kinetics constant S Saturation constant and cumulated number of publications on the topic of bioc
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