Reference health
Enhanced Adsorption of Hexavalent Chromium from Aqueous Solution by Citric Acid-Modified Biochar from Invasive Plant Biomass
2 of 63 checkable references need attention · checked 2026-08-10
At the dated check, the references listed below either did not resolve in Crossref or DataCite, or carried a retraction notice. Each one is shown with the registry record that put it there.
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References needing attention
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The 2 references without a DOI — listed, not checked
no DOI — not checkedRamanayaka, S., Vithanage, M., Alessi, D. S., Liu, W.-J., Jayasundera, A. C. A., & Ok, Y. S. (2020). Nanobiochar: Production, properties, and multifunctional applications. Environmental Science: Nano, 7(11), 3279–3302.
no DOI — not checkedTewari, B. B., & Thornton, O. C. (2010). Use of basic Methylene Blue Dye for specific surface area measurement of metal hexacyanoferrate (II) complexes. Revista De La Sociedad Química Del Perú, 76(4), 330–335.
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