“…In the last decade, extensive researches have been conducted for the purpose of identifying new, efficient, and low‐cost sorbents for the removal or preconcentration of Tl. On the one hand, a number of conventional sorbents such as activated carbon , hydrous manganese dioxide , and zeolite have been applied in Tl sorption. On the other hand, more and more novel or low‐cost materials have been adopted, e.g ., some nanoparticles or metal oxides, including multiwall carbon nanotubes (MWCNTs) , titanium dioxide nanoparticles , and RuO 2 –TiO 2 , geological materials such as goethite and pyrolusite , and other adsorbents such as peat , phosphogypsum , fungal biomasses as, e.g ., Aspergillus niger , organic materials polyacrylamide‐aluminosilicate , and Prussian blue immobilized in alginate capsules .…”