The role of trees in accumulation of particulate matter including 137Cs in Fukushima.
|代表者||Stanislaw Gawronski （Warsaw University of Life Sciences）|
Air pollution remains a major issue in many countries of the world and poses a serious threat for humanosphere. The most relevant air pollutants in urban environment are particulate matter (PM), absorbing on their surface heavy metals, organic pollutants (as for example polycyclic aromatic hydrocarbons- PAH), and gaseous compounds as: ozone, nitrogen oxides, sulphur dioxide. Plants, as sessile organisms, developed unique defense mechanisms allowing them to survive in very polluted sites and tolerate high accumulation of toxic compounds in their tissues. The knowledge gained in recent years, about these plants’ capabilities allow them to develop of environmental biotechnology called: phytoremediation in which plants are “hired” to work for pollutants absorbing/adsorbing, and degradation or deactivation of organic compounds. These capabilities allow plants, together with associating microbiomes, play an important role in biofiltering of ambient air by absorbing gaseous pollutants and adsorbing PM onto leaf surfaces (Figure 1.). What is worth note plants they are able to clean up the air from many pollutants simultaneously. In the phytoremediation this process is called phytoextraction.
On the other hand, after the five years of big earthquake in eastern Japan, we still have many problems of nuclear power plant accident. Especially we have to survey the radionuclide movement in the forest sphere at Fukushima prefecture.
Figure 1. Particulate matter content on leaves of linden tree as affected by distance of PM emission Tazienki Park.