The Research About The Distribution And Modality Analysis Of The Chromium In The Dustfall On The Campus Of ChengDu Univerisity Of Technology

The air granula is one of the most harmful infectant and the composition are verycomplex in the air environment. The granula is harmful substance and the carrier andreaction bed of the other pollutants. Chronium is the one of the most importantelement in environment pollution. The toxicity of chromium and usability of biologyare not lie in the gross of the chromium. It is lie in the modality.The thesis focused on the study of the chromium gross of the atmosphere dustfallin the ChengDu University Of Technology. and compared with the other regions inthe city of ChengDu. and tried to find the distributing factors of the chromiumprobably. The conclusions were that: The content of chromium was relatively higherin the Front School Door, Back School Door and the North Campus area than theTesting Floor, Natural Science Floor and the Club.The lowest content appeared onthe Lake Island, The Forth Student Roominghouse and the South Center area. Thecontent of chromium on campus was less lower than GaoXin region and WuHouregion. and had the sameness with the QingYang region and JinJIang region.The results showed that in the atmosphere dustfall, the content of Cr6+ wasmuch lesser than the Cr3+. The content of the heavy metal chromium in dustfall wasvarious with the content in the soil. The former was higer thanthe latter. and basicallywais the twice times than the latter. The modality distributing factor weredifferent. The element of chromium in dustfall was consist in the draft crystal latticestate and iron andmanganese oxid unite state. and both discrepancy was not toolarge. But the element of chromium in the soil was consist in the draft crystal latticestate. At the same time, we had researched the means of the sample clearing up andthe methods of the experiment mensuration.