Effects of environmental conditions, low-level potassium, ethylenediaminetetraacetic acid, or combination treatment on radiocesium-137 decontamination in Napier grass

Effect of drought stress or soil pH on cesium accumulation in Napier grass

“…Trace elements become concentrated in the remaining soil solution due to higher evapotranspiration resulting in higher uptake (Ehlken and Kirchner 1996). Previously, we suggested that 137 Cs decontamination e ciency by Napier grass was strongly affected by uctuating environmental conditions, particularly precipitation, during the cultivation period (Kang et al 2021). Drought stress led to reduced 137 Cs concentration in V. mungo (Win et al 2017(Win et al , 2015, but there was no difference in the association with Cs concentration in grasses such as Agropyron spicatum, Leymus cinereus, Agropyron cristantum, and Bromus tectorum (Cook et al 2009).…”

“…Previously, we attempted to increase 137 Cs decontamination e ciency using various effective methods in Cs-polluted agricultural land. However, its effectiveness on 137 Cs decontamination was unstable even in the same experimental site and often affected by natural environmental factors (Kang et al 2021). Several factors, such as the soil's physicochemical properties, Cs bioavailability, and climatic conditions are closely related with plant decontamination e ciency (Patra et al 2020).…”

Potassium in silicon‐rich biomass wastes: A perspective of slow‐release potassium sources

“…Interestingly, the development of a phytolith structure inadvertently results in the occlusion of organic matter 2 and nutrients 3,4 in its structure, hence it turns out to be beneficial to carbon sequestration or, to some extent, the phytolith might act as a sink and source of nutrients 5 . Potassium (K) is among the most important elements that serves as an appropriate ionic environment for metabolic processes in the cytosol and, as such, functions as a regulator of various processes including growth 6,7 . As it occurs throughout plant organs, K can inadvertently be subcompartmented or even isolated within voids and cavities in the phytolith structure (namely phytK), and it can comprise up to 10% of the phytolith 3 .…”

“…5 Potassium (K) is among the most important elements that serves as an appropriate ionic environment for metabolic processes in the cytosol and, as such, functions as a regulator of various processes including growth. 6,7 As it occurs throughout plant organs, K can inadvertently be subcompartmented or even isolated within voids and cavities in the phytolith structure (namely phytK), and it can comprise up to 10% of the phytolith. 3 In anthropogenic agricultural systems such as rice paddies, hundreds of millions of tons of phytK are annually or seasonally created together with straw.…”