Screening of the Indoor Plants for Removing Formaldehyde

[ Objective] The research aimed to screen out the best ornamental houseplants to remove formaldehyde from indoor air through deposition velocity and to explore the pathways of plants for formaldehyde removal. [ Method] Fifty-three indoor ornamental plant species were experimen- ted in series of sealed chambers （volumes of O. 096 m^3 ） by formaldehyde fumigation with the internal concentration of （1 ± 0. 1 ） mg/L in this study. The removal efficiency of formaldehyde was assessed by the uptake fluxes and the deposition velocity of formaldehyde. [ Result] Six species of indoor plants （ Hedera helix, Ficus elastica Roxb. ex Hornem, Nephrolepis exaltata cv. Bostoniensis, Begonia evansiana, Mentha canadensis L. and Adiantum capillus-veneris Linn. ） with high formaldehyde removal efficiency were firstly screened out. Significance analysis of the deposition velocity by Statistical Program for Social Sciences （SPSS） presented that tested plants belonging to the same genera or family had similar ability to remove formaldehyde pollution. The diurnal variations of deposition velocity for the six plants were then tested further. The results showed that four of them, including Ficus elastica Roxb. ex Hornem, Nephrolepis exaltata cv. Bostoniensis, Mentha canadensis L. and Adiantum capi//us-veneris Linn. re- moved formaldehyde mainly by leaves surface adsorption, while Begonia evansiana and Hedera helix by stomatal uptake, f Conclusion Begonia evansiana and Hedera helixare the most efficient indoor plants among the 53 species studied for phytoremediation of the air formaldehyde pollution.

Experimental Study on Key Techniques for Indoor Cultivation of Sprout Vegetables in Families

This paper introduced the advantages of planting sprout vegetables in family rooms,expounded assembly principle of indoor cultivating device and the key techniques for indoor cultivating sprout vegetables in families.In the experiment,we assembled a set of indoor cultivating device for sprout vegetables,and summarized the indoor cultivating techniques of sprout vegetables in families.The indoor planting device was suitable for family members to cultivate sprout vegetables in the living rooms,kitchen,balcony and other corner space by using their spare time.It could not only provide high-quality vegetables for families,but also beautify the indoor environments of family rooms,and increase the oxygen content in rooms.This set of indoor cultivating device and techniques was suitable for planting various sprout vegetables(e.g.radish seedling,water spinach seedling,pea seedling,pine willow seedling,sunflower seedling and various bean seedlings,etc.).This is a set of high-efficient spatial planting technique in families,and also an effective way to increase organic vegetable supply for family.