Mapping the field: a bibliometric analysis of land use and carbon emissions (LUCE) research from 1987 to 2018

Visual analysis of greenhouse gas emissions from sewage treatment plants based on CiteSpace: from the perspective of bibliometrics

With the global reduction actions of greenhouse gas (GHG) emissions, environmental facilities, including sewage treatment plants (STPs), need to reduce pollutants while minimizing GHG emissions. Therefore, more and more publications revealed the formation mechanism of GHGs in STPs and committed to finding better reduction schemes. From the perspective of bibliometrics, this study used CiteSpace to conduct quantitative and visual analysis based on 1,543 publications retrieved from Web of Science between 2000 and 2021 around the world. We have systematically evaluated the structure, development trend, hot spots, and research frontier in the field of GHG emissions from STPs and compared with the contents of top journals to verify the scientificity of the analysis. The results show that the number of publications has increased year by year, and the networks of authors and institutions show a strong correlation. Among them, the clusters of nitrous oxide, anaerobic digestion, and life cycle assessment (LCA) started earlier and received extensive attention, which derived other clusters in the research process. With the development of the field, researchers have gradually changed from single water treatment facilities to multi-carriers that can realize energy regeneration and utilization simultaneously. Accordingly, the GHG reduction of STPs through energy regeneration and resource recovery has become a hot point and frontier direction, which also challenges the breakthroughs in relevant technologies. Furthermore, it provides scientific support for the formulation of relevant incentive policies and economic subsidy systems, so as to alleviate the pressure of global warming and realize the sustainable development of STPs concurrently.

Local food research: a bibliometric review using Citespace II (1970–2020)

Purpose

In recent years, one of the most important and active research areas has been local food. This study aims to examine the evolution and trends of local food research in several disciplines or fields in the 50 years, highlighting emerging research themes, collaborations such as authors, institutions, journals and co-citations such as documents, authors and journals.

Design/methodology/approach

A total of 869 local food-related articles from the Web of Science (WoS) database from 1970 to 2020 were analyzed by several bibliometric analyses using CiteSpace II software.

Findings

The findings indicate that the number of studies in the local food field has increased rapidly and it is an interdisciplinary subject. Moreover, the results indicate that there is partly collaboration among authors, institutions or countries that conduct research on local food. For example, the most productive authors in this field are in USA, India, Brazil and European countries. Another remarkable result of this study is that tourism and hospitality discipline has focused on local food subject, especially in the last five years.

Originality/value

This is one of the first attempts by using network analysis to directly understand and visualize the interrelated structures of the local food research. Furthermore, the results of this study may provide researchers a reference guide to better evaluate and monitor local food research.