Shaohua Liao’s scientific contributions

PM 2.5 is the focus of current research, but the dust fall seems relatively insignificant. The effect of dust fall on the growth of Eichhornia Crassipes was studied in this paper. Through macroscopic experiments, the apparent characteristics of Eichhornia Crassipes before and after dust fall, including weight increase, root length and leaf number, were studied. At the same time, the changes of pH value, TP and TP of Eichhornia Crassipes in water environment before and after dust fall were studied. The change of pH value was not significant, but dust fall strongly inhibited the absorption of TP and TN by Eichhornia Crassipes . The dust fall contains nutrients such as C, N, P, Cu and Zn required for plant growth, however, the positive effects of the nutrient elements provided by dust fall on the growth of Eichhornia Crassipes were smaller than the negative effects on the quality, root length and leaves of plants. The results of Evans blue staining showed that the cells of Eichhornia Crassipes were obviously damaged by dust fall at the cellular level. The heavy metals (such as Cu and Pb) in the dust fall may play an important role for the negative effects of this test.