To understand the current research output on arsenic (As) removal and research related to the As contamination, a bibliometric analysis based on Scopus database was carried out. The analysis includes the research covering the leading countries and year-wise literature outputs. Bibliometric analysis revealed the increasing trend in research published on As removal (more than 1200 articles) using physico-chemical methods from 1995 onwards and United States as the leading contributor. Among different research institutions, Chinese Academy of Sciences has contributed maximally to research articles reaching up to 950, and the maximum 635 research articles were published in the journal Environmental Science and Technology with respect to As removal using physico-chemical methods. With respect to As removal using biological methods, around 400 research articles were recorded from 1995 onwards and the maximum article contribution (1052) was registered for China followed by USA (964). Based on Scopus data 2021, the maximum 222 articles on As removal using biological methods were recorded for the journal Chemosphere. The present review emphasizes on currently available physico-chemical and emerging treatment processes for the removal of As, generally occurring as arsenite and arsenate, from drinking water. It has been suggested by various studies that a combination of low-cost physico-chemical treatment methodologies such as ion exchange, reverse osmosis, precipitation, filtration, and adsorption along with biological methods can be a safe alternative for As removal from drinking water. Overall, the study suggests that there is a strong need for further research on efficient processes involving lab to land approaches for As removal from groundwater in order to reduce the toxicity and contamination of As in drinking water.
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