Purification of Ambient Air by Novel Green Plant with Titanium Dioxide Nanoparticles

Khaled F. Salama, Mubashir Zafar

Abstract


Background: Indoor air pollution is an important environmental health problem. Nanotechnology is one of the most important methods to reduce the indoor air pollution. Titanium dioxide (TiO2 ) is generally accepted as one of the most effective photoinduced catalysts. It is frequently used to oxidize organic and inorganic compounds in the air due to its strong oxidative ability and long‑term photostability. The aim of this study was to determine the effectiveness of nanotechnology in the purification of ambient air by using Saudi myrtle plants treated with TiO2 . Methods: Experiments were conducted in two academic departments of the laboratories at the Public Sector University. Concentration of formaldehyde, nitrogen dioxide (NO2 ), sulphur dioxide (SO2 ) and other toxic gases was measured in the environment of the laboratories. Myrtus plant was growing in the growth media which contained TiO2 . After 8 hours of exposure of the plant, concentration of NO2 , SO2 and other toxic pollutant gases in the air was measured. The total duration of the experiment was 4 days. Results: It was found that the levels of formaldehyde, volatile organic compounds (VOCs) and other pollutants were significantly reduced the concentration from 10% to 98% in the air. After intervention, air containing the concentration of formaldehyde, TVOCs, NO2 SO2 and carbon monoxide (CO) on the fourth day reduced from 0.251, 401, 0.032, 0.009 and 0.99 to 0.014, 54,0.0003, 0.003 and 0.01 after exposure of Myrtus plant to ambient air. Conclusions: Significant reduction of air pollutants in the air after application of TiO2 in the green plant (Myrtus communis). It is a novel approach and economically feasible for purification of indoor air.

Keywords


Air pollution; environment; health; purification; viridiplantae

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References


Wang S, Ang HM, Tade MO. Volatile organic compounds in

indoor environment and photocatalytic oxidation: State of the art.

Environ Int 2007;33:694‑705.

De Witte K, Meynen V, Mertens M, Lebedev OI, Van Tendeloo G,

Sepulveda‑Escribano A, et al. Multi‑step loading of titania on

mesoporous silica: Influence of the morphology and the porosity

on the catalytic degradation of aqueous pollutants and VOCs.

Appl Catal B: Environ 2008;84:125‑32.

Jones AP. Indoor air quality and health. Atmos Environ

;33:4535‑64.

Park J, Lee L, Byun H, Ham S, Lee I, Park J, et al. A study of the

volatile organic compound emissions at the stacks of laboratory

fume hoods in a university campus. J Clean Prod 2014;66:10‑8.

Alshuwaikhat HM, Abubakar I. An integrated approach to

achieving campus sustainability: Assessment of the current

campus environmental management practices. J Clean Prod

;16:1777‑85.

Strini A, Cassese S, Schiavi L. Measurement of benzene,

toluene, ethylbenzene and O‑xylene gas phase photodegradation

by titanium dioxides dispersed in cementitious materials using a

mixed flow reactor. Appl Catal B‑Environ 2005;61:90‑7.

Ochiai T, Fujishima A. Photoelectrochemical properties of TiO2

photocatalyst and its applications for environmental purification.

J Photochem Photobiol C Photochem Rev 2012;13:247‑62.

Fujishima A, Zhang X. Titanium dioxide photocatalysis: Present

situation and future approaches. Comptes Rendus Chimie

;9:750‑60.

Hassan Mm, Dylla H, Mohammad LN, Rupnow T. Effect of Application Methods on the Effectiveness of Titanium Dioxide

as a Photocatalyst Compound to Concrete Pavement. Paper

presented at the 89th Transportation Research Board Annual

Meeting. 2010.

Hussin M. Ismail MR, Ahmad MS. Air‑conditioned university

laboratories: Comparing CO2

measurement for centralized and

split‑unit systems. J King Saud Uni–Eng Sci 2017;29:191‑201.

Godwin C, Batterman S. Indoor air quality in Michigan schools.

Indoor Air 2007;17:109‑21.

Sofuoglu SC, Aslan G, Inal F, Sofuoglu A. An assessment of

indoor air concentrations and health risks of volatile organic

compounds in three primary schools. Int J Hyg Environ Health

;214:38‑46.

ASHRAE Standard 62–2007. Ventilation for acceptable

indoor air quality. Atlanta: American Society of Heating and

Refrigerating and Air‑Conditioning Engineers Inc.

Ma X, Geiser‑Lee J, Deng Y, Kolmakov A. Interactions

between engineered nanoparticles (ENPs) and plants:

Phytotoxicity, uptake and accumulation. Sci Total Environ

;408:3053‑61.

Ochiai T, Fujishima A. Photoelectrochemical properties of TiO2

photocatalyst and its applications for environmental purification.

J Photochem Photobiol C Photochem Rev 2012;13:247‑62.

Rackes A, Waring MS. Using multiobjective optimizations to

discover dynamic building ventilation strategies that can improve

indoor air quality and reduce energy use. Energy Building

;75:272‑80.

Sulaiman Z, Mohamed M. Indoor air quality and sick building

syndrome study at two selected libraries in Johor Bharu,

Malaysia. Environ Asia 2011;4:67‑74.

Syazwan AI, Juliana J, Norhafizalina O, Azman ZA,

Kamaruzaman J. Indoor air quality and sick building syndrome

in malaysian buildings. Glob J Health Sci 2009;1:126‑35.

Toprak M, Gursoy G, Demiral Y, Cimrin AH, Sofuoglu S.

Indoor Air quality and occupational risk factors in university

laboratories. Hava Kirliligi Arastirmalari Dergisi 2013;2:87‑95.

USEPA. An Office Building Occupant’s Guide to Indoor Air

Quality. US Environmental Protection Agency, USA; 2003.

Han Z, Chang VWC, Zhang L, Tse MS, Tan OK, Hildemann LM.

Preparation of TiO2‑coated polyester fiber filter by spray‑coating

and its photocatalytic degradation of gaseous formaldehyde.

Aerosol Air Qual Res 2012;12:1327‑35.

Mendes A, Pereira C, Mendes D, Aguiar L, Neves P, Silva S,

et al. Indoor air quality and thermal comfort‑results of a pilot

study in elderly care centers in portugal. J Toxicol Environ

Health A 2013;76:333‑44.

Song JE, Kim YS, Sohn JY. The impact of plants on the

reduction of volatile organic compounds in a small space.

J Physiol Anthropol 2007;22:599‑603.

Wood RA, Orwell RL, Tarran J, Torpy F, Burchett M.

Potted‑plant/growth mediainteractions and capacities for

removal of volatiles from indoor air. J Hortic Sci Biotechnol

;77:120‑9.

Orwell RL, Wood RA, Tarran J, Torpy F, Burchett MD.

Removal of benzene by the indoor plant/substrate microcosm

and implications for air quality. Water Air Soil Pollut

;157:193‑207.

Alessio GA, De Lillis M, Fanelli M, Pinelli P, Loreto F. Direct

and indirect impacts of fire on isoprenoid emissions from

Mediterranean vegetation. Func Ecol 2004;18:357‑64.

Bita CE, Gerats T. Plant tolerance to high temperature in a

changing environment: Scientific fundamentals and production

of heat stress‑tolerant crops. Front Plant Sci 2013;4;273. doi:

3389/fpls. 2013.00273

Çakir A. Essential oil and fatty acid composition of the fruits

of Hippophae rhamnoides L. (Sea Buckthorn) and Myrtus

communis L. from Turkey. Biochem Syst Ecol 2004;32:809‑16.

Yau YH, Chew BT, Saifullah AZA. Studies on the indoor air

quality of pharmaceutical laboratories in Malaysia. Int J Sustain

Built Environ 2012;1:110‑24.