scholarly journals Removal of contaminants in indoor air by using green plant treated with titanium dioxide nanoparticles

2019 ◽  
Author(s):  
Khaled Fikry salama ◽  
Mubashir Zafar Zafar
Keyword(s):  
Air Pollution ◽  
Titanium Dioxide ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Titanium Dioxide Nanoparticles ◽  
Plant Root ◽  
Ambient Air ◽  
Green Plant ◽  
Growth Media ◽  
Novel Approach

Abstract Background: Indoor air pollution is important environmental health problem. Nanotechnology is one of the most important methods to reduce the air pollution. The aim of this study to determine the effectiveness of nanotechnology for removal of toxic air indoor pollution by using Saudi myrtle plants treated with titanium dioxide. Methods: Experiments were conducted in the two academic departments of labs at public sector universities. Aplying titanium dioxide-containing growth media to at least one of a Myrtus communis plant root, stem, and leaf. Growing the plant in the growth media, a gel growth media, or both; exposing the plant to contaminant-containing air Results: It is found that the levels of formaldehyde, Volatile organic compounds and other pollutants were significantly reduced the concentration from 10% to 98% in air. The duration of the intervention from 4 hours to 8 hours, Air containing the concentration of NO2 SO2, formaldehyde, TVOCs and CO reduced from range of 0.3 ppm- 0.4ppm to range of 0.1ppm -0.3 ppm after exposure of Myrtus plant to ambient air and duration of the exposure is 4 hours to 8 hours. Conclusion: Application of Tio2 in green plant specially Mytrus Communis is a novel approach for reduction of concentrations of harmful gaseous toxic and carcinogenic air pollutants in indoor environment.

scholarly journals Maternal Exposure to Indoor Air Pollution and Birth Outcomes

2019 ◽  
Vol 16 (8) ◽  
pp. 1364 ◽  
Author(s):  
Peter Franklin ◽  
Mark Tan ◽  
Naomi Hemy ◽  
Graham L. Hall
Keyword(s):  
Air Pollution ◽  
Pregnant Women ◽  
Birth Outcomes ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Linear Models ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Z Score ◽  
Birth Records

There is a growing body of research on the association between ambient air pollution and adverse birth outcomes. However, people in high income countries spend most of their time indoors. Pregnant women spend much of that time at home. The aim of this study was to investigate if indoor air pollutants were associated with poor birth outcomes. Pregnant women were recruited prior to 18 weeks gestation. They completed a housing questionnaire and household chemical use survey. Indoor pollutants, formaldehyde (HCHO), nitrogen dioxide (NO2) and volatile organic compounds (VOCs), were monitored in the women’s homes at 34 weeks gestation. Gestational age (GA), birth weight (BW) and length (BL) and head circumference (HC) were collected from birth records. The associations between measured pollutants, and pollution surrogates, were analysed using general linear models, controlling for maternal age, parity, maternal health, and season of birth. Only HCHO was associated with any of the birth outcomes. There was a 0.044 decrease in BW z-score (p = 0.033) and 0.05 decrease in HC z-score (p = 0.06) for each unit increase in HCHO. Although HCHO concentrations were very low, this finding is consistent with other studies of formaldehyde and poor birth outcomes.

Energy and air pollution benefits of household fuel policies in northern China

2020 ◽  
Author(s):  
Wenjun Meng ◽  
Qirui Zhong ◽  
Yilin Chen ◽  
Huizhong Shen ◽  
Shu Tao
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Energy Transition ◽  
Northern China ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Solid Fuels ◽  
Reduce Emissions

<p>In addition to many recent actions taken to reduce emissions from energy production, industry, and transportation, a new campaign substituting residential solid fuels with electricity or natural gas has been launched in Beijing, Tianjin, and other 26 municipalities in northern China, aiming at solving severe ambient air pollution in the region. Quantitative analysis shows that the campaign can accelerate residential energy transition significantly, and if the planned target can be achieved, more than 60% of households are projected to remove solid fuels by 2021, compared with less than 20% without the campaign. Emissions of major air pollutants will be reduced substantially. With 60% substitution realized, emission of primary PM2.5 and contribution to ambient PM2.5 concentration in 2021 are projected to be 30% and 41% of those without the campaign. With 60% substitution, average indoor PM2.5 concentrations in living rooms in winter are projected to be reduced from 209 (190-230) μg/m3 to 125 (99-150) μg/m3. The population-weighted PM2.5 concentrations can be reduced from 140 μg/m3 in 2014 to 78 μg/m3 or 61 μg/m3 in 2021 given that 60% or 100% substitution can be accomplished. Although the original focus of the campaign was to address ambient air quality, exposure reduction comes more from improved indoor air quality because approximately 90% of daily exposure of the population is attributable to indoor air pollution. Women benefit more than men.</p>

scholarly journals Pengaruh Konsentrasi NO2 Udara Ambien pada Daerah Padat Kendaraan Terhadap Konsentrasi NO2 Udara Dalam Ruang (Studi Kasus di Kawasan Simpang Pulai Kota Jambi)

2018 ◽  
Vol 1 (2) ◽  
pp. 60
Author(s):  
Anggrika Riyanti ◽  
Peppy Herawati ◽  
Nyimas Hazana Pajriani
Keyword(s):  
Air Pollution ◽  
Indoor Air ◽  
Government Regulation ◽  
Indoor Air Pollution ◽  
Pearson Correlation ◽  
Ambient Air ◽  
Quality Standard ◽  
Ambient Air Pollution ◽  
Air Pollution Control ◽  
The Relationship

Transportation sector has a very big influence in air pollution. Increase the number of vehicles will caused higher air pollution, such as NO2. The increase in ambient air pollution is feared to have an impact on indoor air pollution. This study purposed is to determine the relationship between  NO2 concentration in ambient to indoor air.  This study used kuantitatif methods with purposive sampling for one month in Simpang Pulai Jambi City.  The relationship between NO2 concentration of ambient air and indoor air was analyzed using simple pearson correlation. The result showed that there was no significant relationship between NO2 concentration in ambient to indoor air with correlation value (r) is 0,437.  The highest NO2 concentration found on the third week in ambient 109,139 µg/m3and indoor air 70,133 µg/m3.  From analysis in one month showed that NO2 concentration in Simpang Kawat Jambi City still meet the air quality standard (150 μg / m3) in Government Regulation Number 41 Year 1999 about Air Pollution Control.

scholarly journals INDOOR AIR POLLUTION IN INDIA AND HEALTH HAZARDS

2015 ◽  
Vol 3 (9SE) ◽  
pp. 1-3
Author(s):  
Rekha Sharma
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Crop Residues ◽  
Rural Households ◽  
Ambient Air ◽  
Outdoor Air ◽  
Indoor Spaces

The ambient air quality in Indian cities has degraded to hazardous levels over the last two decades. People are exposed to extreme health risks due to increasing particulate matter, hazardous airborne agents in indoor spaces Outdoor air quality is affecting indoor air quality too.(1) Indoor air pollution is the degradation of indoor air quality by harmful chemicals and other materials; it can be up to 10 times worse than outdoor air pollution.  Over a million people in India die every year because of indoor air pollution, among highest in the world,(2). Indoor air pollution can be traced to prehistoric times when humans first moved to temperate climates and it became necessary to construct shelters and use fire inside them for cooking, warmth and light. (3) Approximately half the world’s population and up to 90% of rural households in developing countries still rely on unprocessed biomass fuels in the form of wood, dung and crop residues (4). Even today, about 43 percent of rural households and 31 percent of all Indian households use kerosene, for lighting purposes. Its impact on health and environment can be threatening.

The use of indoor plant as an alternative strategy to improve indoor air quality in Indonesia

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Agus Dwi Susanto ◽  
Wira Winardi ◽  
Moulid Hidayat ◽  
Aditya Wirawan
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Sick Building Syndrome ◽  
Ambient Air ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Pollution Problem ◽  
Sick Building

AbstractIndoor air pollution marked with decreased air quality below the set standard. The quality of indoor air is determined by ambient air quality as well as by a harmful substance resulting from the household activity. Indoor air pollution may cause several problems such as sick building syndrome, chronic obstructive pulmonary disease (COPD), asthma, lung cancer, and is responsible for nearly two million death in developing countries. One of the interesting research topics to overcome the indoor air pollution problem is the application of indoor plants. Although there are no established criteria to specify the best indoor plant, several studies have revealed the capability of a particular indoor plant to remove the harmful substances. This paper summarizes important information about indoor air pollution and provides the evidence-based insight of indoor plant usefulness as an alternative way for indoor air remediation.

Air Pollution

2017 ◽  
Author(s):  
Horacio Riojas-Rodríguez ◽  
Isabelle Romieu ◽  
Mauricio Hernández-Ávila
Keyword(s):  
Air Pollution ◽  
Indoor Air ◽  
Environmental Protection Agency ◽  
Air Pollutants ◽  
Indoor Air Pollution ◽  
Ambient Air ◽  
Oxides Of Nitrogen ◽  
Hazardous Air Pollutants ◽  
Adverse Health Effects ◽  
Cardiac Disorders

This chapter describes the adverse effects of both outdoor air pollution and indoor air pollution. Various ambient air pollutants are described as well as their adverse health effects, including acute and chronic respiratory disorders, cardiac disorders, cerebrovascular disease, and cancer. A section deals with National Ambient Air Quality Standards of the Environmental Protection Agency for particulate matter, sulfur dioxide, ozone, oxides of nitrogen, and carbon monoxide. Another section describes exposure assessment. The chapter also describes various measures to control hazardous air pollutants and prevent disorders related to air pollution. In addition, a section features indoor air pollution, including pollution due to burning of biomass for cooking and heat.

scholarly journals Energy and air pollution benefits of household fuel policies in northern China

2019 ◽  
Vol 116 (34) ◽  
pp. 16773-16780 ◽  
Author(s):  
Wenjun Meng ◽  
Qirui Zhong ◽  
Yilin Chen ◽  
Huizhong Shen ◽  
Xiao Yun ◽  
...  
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Energy Transition ◽  
Northern China ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Solid Fuels ◽  
Reduce Emissions

In addition to many recent actions taken to reduce emissions from energy production, industry, and transportation, a new campaign substituting residential solid fuels with electricity or natural gas has been launched in Beijing, Tianjin, and 26 other municipalities in northern China, aiming at solving severe ambient air pollution in the region. Quantitative analysis shows that the campaign can accelerate residential energy transition significantly, and if the planned target can be achieved, more than 60% of households are projected to remove solid fuels by 2021, compared with fewer than 20% without the campaign. Emissions of major air pollutants will be reduced substantially. With 60% substitution realized, emission of primary PM2.5 and contribution to ambient PM2.5 concentration in 2021 are projected to be 30% and 41% of those without the campaign. With 60% substitution, average indoor PM2.5 concentrations in living rooms in winter are projected to be reduced from 209 (190 to 230) μg/m3 to 125 (99 to 150) μg/m3. The population-weighted PM2.5 concentrations can be reduced from 140 μg/m3 in 2014 to 78 μg/m3 or 61 μg/m3 in 2021 given that 60% or 100% substitution can be accomplished. Although the original focus of the campaign was to address ambient air quality, exposure reduction comes more from improved indoor air quality because ∼90% of daily exposure of the rural population is attributable to indoor air pollution. Women benefit more than men.

The Synthesis of Air Filters from Silk Cocoons Coated TiO2 for Use in Air Purifier

2014 ◽  
Vol 931-932 ◽  
pp. 281-285 ◽  
Author(s):  
Pornwimon Wadchasit ◽  
Wipawee Khamwichit ◽  
Wipada Sanongraj
Keyword(s):  
Air Pollution ◽  
Titanium Dioxide ◽  
Band Gap ◽  
Silk Fibroin ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Physical Property ◽  
Air Pollutant ◽  
Silk Fibre ◽  
Air Filter

The purpose of this research was to synthesize and form fibroin silk air filter (SF filter) coated and non-coated with titanium dioxide. For use in indoor air pollution treatment. The main air pollutant to be treated is PM2.5. However, VOC removal also investigaed in this study. The synthesis involved degumming process using 0.5 wt % Na2CO3 at 90°C for 60 minutes. Titanium dioxide (TiO2) used in the study was a catalyst Tipaque brand (code A-220 (Anatase)). Results from studying on physical property by scanning electron microscope found that silk fibre was an ununiformly arrangement structure. SF filter coated with TiO2 showed that TiO2 distributed uniformly on the filter. The silk fibroin filters were brought to analyze for the energy band gap in order to find the energy value that the catalyst was needed to stimuate reaction in the photocatalytic process. It was found that TiO2 1-7.5 %(w/v) catalyst coated on the silk fibroin filters had the highest value of light absorption at 390 nanometers, which agreed with the value of energy level in the band gap period of 3.18 eV.The results from efficiency studies of SF filters in the treatment of indoor air pollution (generated from incense fume of 0-2 micron in size) indicated that the best treatment efficiency was 99.76%. In which SF filter non-coated with TiO2 was used, and initial PM2.5 concentration was 5 mg/m3, air flow rate was 3.93 m3/min. Treatment period was 8 hours.

scholarly journals Measurement of Indoor Air Pollution in Bhutanese Households during Winter: An Implication of Different Fuel Uses

2021 ◽  
Vol 13 (17) ◽  
pp. 9601
Author(s):  
Thipsukon Khumsaeng ◽  
Thongchai Kanabkaew
Keyword(s):  
Air Pollution ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Polynomial Regression ◽  
Meteorological Data ◽  
Ambient Air ◽  
Air Pressure ◽  
Atmospheric Conditions ◽  
High Concentrations ◽  
Pm2.5 And Pm10

Measurements of indoor air pollution in Bhutanese households were conducted in winter with regards to the use of different fuels. These measurements were taken in Thimphu, Bhutan, for PM1, PM2.5, PM10, CO, temperature, air pressure and relative humidity in houses and offices with various fuels used for heaters and classified as the hospital, NEC, kerosene, LPG and firewood. The objective of this study was to measure the pollutant concentrations from different fuel uses and to understand their relationship to the different fuel uses and meteorological data using a time series and statistical analysis. The results revealed that the average values for each pollutant for the categories of the hospital, NEC, kerosene, LPG and firewood were as follows: CO (ppm) were 6.50 ± 5.16, 3.65 ± 1.42, 31.04 ± 18.17, 33.93 ± 26.41, 13.92 ± 17.58, respectively; PM2.5 (μg·m−3) were 7.24 ± 4.25, 4.72 ± 0.71, 6.01 ± 3.28, 5.39 ± 2.62, 18.31 ± 11.92, respectively; PM10 (μg·m−3) was 25.44 ± 16.06, 10.61 ± 4.39, 11.68 ± 6.36, 22.13 ± 9.95, 28.66 ± 16.35, respectively. Very coarse particles of PM10 were identified by outdoor infiltration for the hospital, NEC, kerosene and LPG that could be explained by the stable atmospheric conditions enhancing accumulation of ambient air pollutions during the measurements. In addition, high concentrations of CO from kerosene, LPG and firewood were found to be mainly from indoor fuel combustion. Firewood was found to the most polluting fuel for particulate matter concentrations. For the relationships of PM and meteorological data (Temp, RH and air pressure), they were well explained by linear regression while those for CO and the meteorological data, they were well explained by polynomial regression. Since around 40% of houses in Thimphu, Bhutan, use firewood for heating, it is recommended that ventilation should be improved by opening doors and windows in houses with firewood heaters to help prevent exposure to high concentrations of PM1, PM2.5, and PM10.

scholarly journals Assessment of Indoor and Ambient Air Pollution at Complex Buildings in Hanoi

2019 ◽  
Vol 35 (3) ◽  
Author(s):  
Hoang Anh Le ◽  
Le Thuy Linh
Keyword(s):  
Air Pollution ◽  
Indoor Air ◽  
Air Pollutants ◽  
Indoor Air Pollution ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Shopping Malls ◽  
High Concentration ◽  
Pollutant Concentrations ◽  
Rc Building

The most typical air pollutants including PM10, CO, SO2, NOx are monitored at different sites indoor (basement, shopping malls) and outdoor (ambient air) of several complex buildings which are used for different purposes of resident, office, and shopping malls in Hanoi. The results show that the indoor air pollution concentrations tend to be higher than the corresponding pollutants of the ambient air. The results show the highest concentrations are in RC building for the same category of floor comparing to the other two buildings. Pollutant concentrations at basement for parking is the highest with the values of PM10, SO2, NOx, CO of 67.1 ± 21.2 µg/m3, 224.8 ± 34.9 µg/m3, 287.3 ± 136.3 µg/m3, 22,372.5 ± 2,324.5 µg/m3, respectively. The high concentration of indoor air pollutants are harmful for human health, especially for those who have longer exposure time.        

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