Aggregation, retention and transport of γ-MnO nanoparticles in water-saturated porous media: Impact on the immobility of thallium.

Nano-scale Mn oxides can act as effective stabilizers for Tl in soil and sediments. Nevertheless, the comprehensive analysis of the capacity of MnO to immobilize Tl in such porous media has not been systematically explored. Therefore, this study investigates the impact of γ-MnO, a model functional nanomaterial for remediation, on the mobility of Tl in a water-saturated quartz sand-packed column.

Thallium release from biochar-amended soil to runoff in laboratory experiments.

Biochar has been widely used for trace metal(loid) (TM) immobilisation in contaminated soils. However, studies on the physicochemical mobility of TMs related to biochar application are highly limited, hampering the evaluation of the immobilisation efficiency of biochar. Therefore, after confirming the ability of biochar to decrease soil Tl bioavailability, this study examined the release of Tl in dissolved and particulate forms in surface runoff and leachate from soil mixed with biochar at different dosages and grain sizes under artificially simulated rainfall and irrigation experiments.