Prajapati Santosh Kumar, Tripathi B D
Pollution Ecology Research Laboratory, Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221005, India.
Environ Monit Assess. 2008 Apr;139(1-3):351-4. doi: 10.1007/s10661-007-9841-9. Epub 2007 Jun 13.
The magnetic properties of tree leaves along with their ecological, economical and aesthetic importance can be used to control road derived respirable particulates. Isothermal remanent magnetization (IRM(300) mT) of three different tree leaves viz. Mango (Mangifera indica), Sisso (Dalbergia sisso) and Banyan (Ficus benghalensis) were determined and IRM(300) mT normalized for the leaf area. The normalized 2-D magnetization of leaves as shown by results is dominantly controlled by leaf morphology and traffic density. F. benghalensis (Banyan) leaf has highest 2-D magnetization and D. sisso (Sisso) leaf having least 2-D magnetization suggesting greater ability of F. benghalensis (Banyan) tree leaves to reduce magnetic particulates. The particle size of the magnetic grains falls in the category of PM2.5, a particle size hazardous to human health due to its capacity to be inhaled deeply into the lungs.
树叶的磁性连同其生态、经济和美学重要性，可用于控制道路产生的可吸入颗粒物。测定了三种不同树叶，即芒果（芒果属印度种）、印度黄檀和孟加拉榕树叶的等温剩磁（IRM(300) mT），并将IRM(300) mT按叶面积进行归一化。结果所示的树叶归一化二维磁化主要受叶片形态和交通密度控制。孟加拉榕树叶具有最高的二维磁化，而印度黄檀树叶的二维磁化最低，这表明孟加拉榕树叶减少磁性颗粒物的能力更强。磁性颗粒的粒径属于PM2.5范畴，由于其能够深入肺部被吸入，这种粒径对人体健康有害。
