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Variasi Lama Waktu Kontak Tanaman Lidah Mertua(Sansevieria Trifasciata Lorentii Mein Leibling)Dalam Menurunkan Kadar Karbon Monoksidadan Sulfur Dioksida di Dalam Ruangan
ABSTRACT
Urban areas with a lot of industrial and technological activities, and also with densely traffic, re¬sult in the increasing of air pollution. 70 % of toxic gases existed in big cities' air are coming from motor engined vehicles. Meanwhile, the low quality of indoor air are mostly caused by internal source of contaminants. The purposes of the study were to find out the amount of carbon mono¬xide (CO) and sulphur dioxide (SO2) concentration decrease after have been contacted to Lidah Mertua plants (Sansevieria trifasciata kwenffi mein leibling) among 2, 4 and 6 hour variations; and to know which contact time has the most effective results.
The study conducted a quasi ex¬periment with controlled time series design by using a green house to observe the data. For each study group, there were five pot of the plants with equal width, height and number of leaf, and were observed from six replications.
Descriptively, the results showed that the mean de¬crease ofCOconcentration in the control and treatment groups for 2, 4 and 6 hour contact time were: 47,17 ppm (2,30 %), 120,67 ppm (5,87 %), 212,83 ppm (10,36 %); and 400,83 ppm (19,57 %), 881,50 ppm (43,05 %), 1717,50 ppm (83,88 %) respectively. Meanwhile, for SO2, the mean decrease for both groups were observed as much as 24,17 ppm (1,76 %), 62,67 ppm (4,57 %), 114,00 ppm (8,32 %); and 225,00 ppm (16,63 %), 480,00 ppm (35,48 %), 686,33 ppm (65,52 %). P-values obtained from the one way anava test were
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