Yes, several studies prove this systematics, which has been researched for 25 years now. We list only a few here:
An extensive study from Norway from April 1998 to April 1999 in 2 schools with a total of 6 classrooms in which tropical indoor plants were set up in bioprocess systems, i.e. in containers in which the indoor air was led through the soil and the root zone, has shown that significant changes in the indoor air were brought about.
Here are some facts and figures:
Symptoms of fatigue, headache and cough were found to be significantly lower in the planted classrooms than in the non-planted classrooms.
The students sitting in the planted classrooms showed a 23% higher concentration ability than the students in the classrooms without plants.
An analysis of the indoor air showed that the concentration of volatile organic substances in the planted classroom was 35% lower.
The number of sick leaves among the "green pupils" decreased by 33%.
Symptom evaluation of 11 different symptoms with 48 participating pupils.
Head severity -33%
feeling of dizziness -25%
itching, burning, irritation of the eyes -15%
Irritated, stuffy or runny nose -11%.
hoarseness, dryness in the throat -31%
Dry, irritated facial skin -11%.
dandruff, itching of the scalp -19
dry hands -21%
Recent studies from Germany and Australia confirm the ability of plants and plant ecosystems and microorganisms to be effective air purifiers, even when the concentration of chemicals is low. (Schmitz 1995, Wood et al. 1999). The air purification system needs 7-14 days to adapt to the chemicals in the air.
The ventilated bioprocess system in which the substrate and plant roots are ventilated operates independently of light, which means that photosynthetic activity is less important than the symbiotic activity of the roots and microorganisms - at least after the system has adapted to the environment (Tjove Fjeld 1999).
Further studies described in English:
Dr. Bill Wolverton conducted early research for NASA (early 1990's, book first published 1996) to prove that plants absorbed toxins from the air around them, translocated it to their roots, where organisms turned the toxins into food for the plant. Wolverton published a book after his research naming a number of plants which are accepted as the most effective.
Later research from Dr Ronald Woods, University of Technolog y, Sydney, Australia (2001 & 2004) did further research both in laboratory and real life settings to show that plants removed toxins from the indoor air. Wood used Kentia Palm, Dracaena and Spathiphyllum (Peace Lily) plants.
Meanwhile research in Norway found that air in schools was cleaner once plants were introduced. Plants used in this research project by Professor Tove Fjeld (pronounced Tove Fjeld), University of Agriculture, Oslo (1998) were: Aglaonema commutatum, Epipremnum aureum (Scindapsus aureum) and Dracaena deremensis.
Professor Margaret Burchett, University of Technology, Sydney commented on interim research results last year (2009) finding that all plants work in the same way i.e. all plants remove toxins from the air.
Andrew Smith, School of Built Environment, John Moores University , Liverpool (2008) conducted research in offices in Edinburgh to show that plants removed the toxins. Plants used: Ficus Alii, Philodendron Scandens, Dracaena Compacta, Scindapsus Aureum, Dracaena Gold Coast, Calathea Triostar, Schefflera Louisiana, Schefflera Arboricola, Schefflera Gold Capella, Spathiphyllum, Calathea Ornata Sanderiana, Calathea Beauty Star, Dracaena Lemon Surprise, Ficus Elastica Melany petit, Ficus Natasja, Peperomia USA and Peperomia Red Margin.
Dr. Ronald Wood, University of Technology, Sydney (2004) calculated how many plants per room under certain circumstances were necessary to clean the air.
Kwang et al, National Horticultural Institute, Korea (2008) looked at how two plants absorbed formaldehyde in laboratory conditions. The two plants he used were Ficus benjamina and Fatsia japonica.