Data and code — Two decades of clay-based adsorbents for heavy-metal remediation: a dual-source bibliometric review

Reproducible R workflow and record identifiers supporting the bibliometric review "Two decades of clay-based adsorbents for heavy-metal remediation: a dual-source bibliometric review of intellectual structure, research fronts and the sustainability gap". The deposit contains 16 R scripts implementing the dual-route Web of Science–Scopus protocol (conversion, cascade deduplication, rule-based standardisation, god-cluster calibration, VOSviewer/Pajek exports, co-citation and bibliographic-coupling label cleaning, historiograph construction and directed-frequency lexical analysis), together with the record identifiers (DOI, WoS accession, year, document type) of the calibrated thematic corpus (N = 9,209) and the intellectual WoS corpus (N = 7,704). Full bibliographic records are not redistributed because the database licences do not permit it; the identifiers allow exact reconstruction of both corpora.