Abstract
Some plants have air purification ability.This purification ability of plants is considered a promising method for indoor air purification because of the low cost and high purification performance.Therefore, several studies have been carried out to investigate the relationship between the air purification ability of plants and environmental conditions.Nevertheless, the purification mechanism and process have not been clarified yet.In this paper, we investigated the air purification process in plants by bioelectrical potential analysis using linear and nonlinear analysis methods.First, we showed that two types of plants have a high air purification ability; Schefflera and Boston fern.Next, we measured AC bioelectrical potential during the purifying process of plants for pollutant gas.Then, we evaluated the power spectra of time series data of the bioelectrical potential.We found that the power spectra shifted to a lower level after gas injection over all frequencies.Thus, the higher power spectrum came from possible higher physiological activities of the plant.Finally, we introduced a nonlinear analysis method from the dynamical system theory.We transformed the time series data of the potential to a higher dimensional state space using a delay coordinate, which is often used in the field of nonlinear time series analysis.The results show that the orbits in the reconstructed state space have a large variation in gas injection.These experimental results suggest that the measurement of bioelectrical potential could become a useful method for evaluating the air purification ability of plants.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Schefflera had high air purification ability.
- Taxon
- Schefflera
Schefflerae0 - Outcome
- high air purification abilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two types of plants have a high air purification ability; Schefflera and Boston fern”
Claim · model-written summary
Boston fern had high air purification ability.
- Taxon
- Boston fern
Nephrolepis exaltatae0 - Outcome
- high air purification abilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two types of plants have a high air purification ability; Schefflera and Boston fern”
Claim · model-written summary
Plant bioelectrical power spectra shifted lower after gas injection across all frequencies.
- Treatment
- gas injectione0
- Outcome
- power spectrae0
- Direction
- shifted to a lower levele0
- Qualifier
- over all frequenciese0
Not reportedTaxonComparator
Verbatim
e0“the power spectra shifted to a lower level after gas injection over all frequencies”
Claim · model-written summary
Higher bioelectrical power spectrum was interpreted as reflecting possible higher physiological activity.
Verbatim
e0“the higher power spectrum came from possible higher physiological activities of the plant”
Claim · model-written summary
Reconstructed bioelectrical state-space orbits varied substantially with gas injection.
Not reportedTaxon
Verbatim
e0“the orbits in the reconstructed state space have a large variation in gas injection”
Claim · model-written summary
Bioelectrical potential measurement was suggested as a method for evaluating plant air purification ability.
- Taxon
- plantsViridiplantaee0
- Outcome
- air purification abilitye0
Verbatim
e0“the measurement of bioelectrical potential could become a useful method for evaluating the air purification ability of plants”