Biochar for toxic chromium removal: Its impacts, mechanism, and future direction

초록

Biochar (BC) has been paid responsiveness during current decades. The present study, BC with chromium, aimed to investigate the research status and future developments. To do so, from the Scopus database, 855 documents regarding BC with chromium were acquired during the study period from 2011 to 2022 and a bibliometric analysis was implemented. Chemosphere was the topmost journal in which most of the papers were published. China is categorized first followed by India and the USA in the publications. With 42 articles, Xinde Cao from China is the topmost author in this research area. China established collaboration with South Korea and the USA. Most influencing authors, journals, papers, and organizations were deliberated in addition to the investigation of keywords. Furthermore, the impact of chromium on soil, plants, and human beings was elaborated followed by the de-pollution mechanism (surface adsorption/reduction, ion exchange method, electrochemical interaction, surface complexation). Its removal efficiency was associated with the effect of adsorbent, pyrolysis temperature, dose, surface area, and pH. The renewal of sorbed BC was elaborated. Current research status and present problems of its elimination in the polluted environment were added. This contributes a lot of ideas to the contemporary research community who are employed in the field of chromium elimination in contaminated environments.

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