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Modern social life environmental pollution is more and more serious, indoor pollution of gas ofvarious kinds, including formaldehyde, benzene, xylene, radon, carbon monoxide, carbon dioxide, sulfurdioxide, etc. Formaldehyde is the most common indoor pollutant in modern architectural decoration.Because of its serious poisonous effect and long time pollution, it has been recognized as suspiciouscarcinogens by the world health organization. At present all sorts of physical and chemical gas pollutioncontrol measures already appeared, but these measures not only expensive, but easy to produce thesecondary pollution. Therefore, it is necessary to research the effects of the plants purifies indoorenvironment by experiments.This experiment use formaldehyde as experiment pollution gas, with a selected four flowers plant toproceed the experiment of indoor air pollution removal and purification. Through the simulation of indoorenvironment and the fumigation of the plants, measuring formaldehyde concentration change of puttingfour kinds of flowers plant in closed environment, in order to analyzing the plants to formaldehydeabsorption effect; Through the statistics of the plant leaves and chlorophyll content change after injured toreflect the plant resistance to formaldehyde; And putting forward the related experimental design andpurifying effect evaluation method based on our own and previous experiments. The result of theexperiment shows that:(1)In12hours, four kinds of flowers plant have certain absorb formaldehyde ability in differentformaldehyde concentration conditions, and different kinds of plants in the same conditions of theformaldehyde concentration can absorb a significant difference, among them Taxus Chinensis shows astrong absorption capacity in the various concentration conditions, and Canna absorption effect is the worstin the low concentrations. In moderate level and high level concentrations, Canna, Fatsia and Jasminehave similar absorption ability. Considering that, within12hours, Taxus absorption effect is the best,Canna absorption effect is the worst.(2)Four kinds of plants in different period of absorbing ability of formaldehyde also has significantdifference, there was no significant difference between the uptake of formaldehyde by Canna under thecondition of different time, while there was a significant difference between each time periods by the otherthree kinds of plants. They absorbed large amounts of formaldehyde in the experiment early, and over time,per unit of time the formaldehyde absorption gradually decreased.(3)Absorptive amount of unit leaf area of formaldehyde was almost all positively Associated withformaldehyde concentration, Fatsia has a largest amount of unit leaf area absorption of formaldehyde in low concentration, while Canna has a minimum amount. In condition of moderate concentration, Taxus hasa largest amount of unit leaf area absorption of formaldehyde while Jasmine has a minimum amount. Incondition of high concentration, Jasmine has a largest amount of unit leaf area absorption of formaldehydewhile Canna has a minimum amount.(4)Within one week after injured, all the plants have part of damage. The degree of injury isaggravated withthe deepening of the experimental concentration.(5)After the formaldehyde fumigation, chlorophyll content of four kinds of plants are different degree ofdecline. The degree of decline is aggravated with the deepening of the experimental concentration.Finally, through the experiment and previous research methods, finding the deficiency from theprocess of previous experiments, summarize related experiment scheme design. Including the closed cyclesystem establishment, polluting gas detection methods, and plants for the pollution of the evaluationmethod in gas absorption effect, providing the reference for the related experiments in future.
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