Application of a novel microalgae-film based air purifier to improve air quality through oxygen production and fine particulates removal

2018 ◽  
Vol 94 (4) ◽  
pp. 1057-1063 ◽  
Author(s):  
Qian Lu ◽  
Chengcheng Ji ◽  
Yuping Yan ◽  
Yan Xiao ◽  
Jun Li ◽  
...  
Keyword(s):  
Air Quality ◽  
Oxygen Production ◽  
Fine Particulates ◽  
Air Purifier ◽  
Particulates Removal

Effect of air purifier on indoor air quality and atopic dermatitis

2013 ◽  
Vol 1 (3) ◽  
pp. 248 ◽  
Author(s):  
Hyun Chul Park ◽  
Young Hoon Kim ◽  
Jeong Eun Kim ◽  
Joo Yeon Ko ◽  
Sun Ju Nam Goung ◽  
...  
Keyword(s):  
Atopic Dermatitis ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Purifier

scholarly journals Effect of Air Purifier Use in the Classrooms on Indoor Air Quality—Case Study

Atmosphere ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1606
Author(s):  
Małgorzata Basińska ◽  
Michał Michałkiewicz ◽  
Katarzyna Ratajczak
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Purification ◽  
Portable Devices ◽  
Microscopic Fungi ◽  
Before And After ◽  
Air Purifier ◽  
High Level

Dissatisfaction with indoor air quality is common even in relatively new or renovated Polish school buildings. To improve air quality in educational buildings, portable devices have seen increased use, for which manufacturers guarantee a high level of indoor air purification. However, their optimized operation largely depends on their correct use. The aim of this article was to determine the effectiveness of air purification in a primary school using an air purification device with an analysis of the classroom indoor air quality (IAQ). Two criteria were used, microbiological and particulate matter concentration. Measurements were made before device installation and during its continuous operation, and before and after lessons on chosen days. Measurements related to IAQ did not detect clear differences in the analyzed measurement periods. For microbiological contamination, in the morning before lessons, the total count for all bacteria and microscopic fungi was definitely lower than after lessons. Comparing the periods before and after device installation, no clear tendency for reducing the bacteria count or microscopic fungi occurred during air purifier operation, nor was there any noticeable trend in the reduction of particulate matter. There was no improvement in air quality in the classrooms during the operation of the purification devices.

Portable Air Purifier with Air Quality Monitoring Sensor

2019 ◽  
Author(s):  
Marin Berov Marinov ◽  
Dimitar Iliev Iliev ◽  
Todor Stoyanov Djamiykov ◽  
Ivan Vladimirov Rachev ◽  
Katya Konstantinova Asparuhova
Keyword(s):  
Air Quality ◽  
Quality Monitoring ◽  
Air Quality Monitoring ◽  
Air Purifier

Air pollution and pulmonary health: Effects of short-term indoor air quality intervention with portable air purifier

2016 ◽  
Vol 2016 (1) ◽  
Author(s):  
Ming Kei Chung ◽  
Xiaoxing Cui* ◽  
Lin Fang ◽  
Jianbang Xiang ◽  
Feng Li ◽  
...  
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Health Effects ◽  
Indoor Air ◽  
Short Term ◽  
Air Purifier

scholarly journals Indoor Air Quality, Information, and Socioeconomic Status: Evidence from Delhi

2021 ◽  
Vol 111 ◽  
pp. 420-424
Author(s):  
Michael Greenstone ◽  
Kenneth Lee ◽  
Harshil Sahai
Keyword(s):  
Air Pollution ◽  
Socioeconomic Status ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
World Health ◽  
Quality Information ◽  
Air Purifier ◽  
Health Organization

In Delhi, one of the world's most polluted cities, there is relatively little information on indoor air pollution and how it varies by socioeconomic status (SES). Using indoor air quality monitors (IAQMs), we find that winter levels of household air pollution exceed World Health Organization standards by more than 20 times in both high-and low-SES households. We then evaluate a field experiment that randomly assigned monthlong IAQM user trials across medium-and high-SES households but suffered from significant survey non-response. Among respondents, IAQMs did not affect take-up of subsidized air purifier rentals or other defensive behavior.

scholarly journals IoT Based Automatic Air Pollution Monitoring and Purification System

2021 ◽  
Vol 9 (9) ◽  
pp. 1378-1383
Author(s):  
Manoj Gurung
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Premature Mortality ◽  
Cost Effective ◽  
Pollution Monitoring ◽  
Air Pollution Monitoring ◽  
Air Purifier

Abstract: Degradation of air quality, like climate change and global warming, has become an all-encompassing existential hazard to humanity and natural life. Exposure to severely polluted air on a regular basis causes pulmonary disorders and contributes to severe allergies and asthma. According to studies, more than 10 million people die each year as a result of irregularities produced directly or indirectly by air pollution. The work of Lelieveld et al. [1] sheds light on the gravity of the problem. It is estimated that by 2050, the worldwide premature mortality from air pollution will exceed 6.6 million fatalities per year (358000 from ozone, the rest from PM 2.5) [1]. As a result, we decided to focus our study on improving indoor air quality. Despite the fact that there are numerous indoor air purifiers on the market, their cost belies their effectiveness, and the effective ones are far too expensive for working-class people to afford [2]. In order to address this issue, we created an automated Internet of Things (IoT) based air filtration system that uses an automated air purifier which is triggered when air quality falls below WHO criteria. Our initiative intends to improve indoor air quality by utilizing the most cost-effective and efficient modules available. Keywords: Indoor Air Pollution, Air Purifier, IAQ, Sharp Dust Sensor GP2Y1010AU0F, IoT, Particulate Matter (PM), HEPA Filter

The relationship between indoor environment, outdoor environment, and behavior on indoor air quality and health

2021 ◽  
Author(s):  
SDAG Lab
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
The United States ◽  
Outdoor Environment ◽  
Equation Modeling ◽  
Health Symptoms ◽  
Surface Dust ◽  
Air Purifier ◽  
The Impact

We should be concerned about the impact of indoor air quality on health because in the United States, people spend most of their time indoors. While earlier studies have characterized the odds of developing illness based on the home environment, they have not investigated the behaviors that can ameliorate the negative effect of indoor, outdoor, and behavioral sources. The purpose of this study was to 1) investigate the contributions of indoor, outdoor, and behavioral sources of pollutants on health symptoms, and 2) to identify the behaviors that can worsen or mitigate the number of health symptoms. Data came from two surveys (n=83,284) and include questions on home conditions, outdoor conditions, occupants’ behaviors, and health symptoms. I used negative binomial regression and identified that demographics and outdoor characteristics explain 2% of the variability in health symptoms, and maintenance behaviors explain 8% of the variability in health symptoms. Next, structural equation modeling (SEM) was used to examine the behaviors that can mitigate or worsen the number of health symptoms. The results show that maintenance issue such as mold result in significantly more health symptoms (β = .12, p <.001). and factors such as leaks, and frequent long shower may result in an increase in mold. Leaks may cause water stains (β = .39, p <.001) which could lead to molds (β = .47, p <.001). While frequent long shower can result in an increase in mold (β = .05, p <.001), the use of a bathroom exhaust during shower may help to reduce molds (β = -.04, p <.001). In terms of personal behaviors, the presence of carpet (β = .08, p <.001), and smoking also result in an increase in surface dust (β = .17`, p <.001) but frequent vacuuming could mitigate the impact of surface dust on health symptoms (β = -.12, p <.001). Home occupants who live near environmental hazards are also likely to use air purifier (β = .03, p <.001); however, air purifier is associated with more health symptoms (β = .05, p <.001). Based on the findings, it is recommended that home occupants engage in periodic maintenance to prevent issues such as leaks from escalating to molds, regular vacuuming to reduce the accumulation of surface dust. Regarding air purifier, it could be that participants who experienced more health symptoms were more likely to use an air purifier. However, some air purifiers are sources of ozone, therefore home occupants should err on the side of caution when it comes to air purifier (Britigan et al., 2006; Cestonaro et al., 2017).

scholarly journals Improving the Indoor Air Quality in Nursery Buildings in United Arab Emirates

2021 ◽  
Vol 18 (22) ◽  
pp. 12091
Author(s):  
Mohammad Arar ◽  
Chuloh Jung
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
United Arab Emirates ◽  
Indoor Air ◽  
Ventilation System ◽  
After School ◽  
Low Emission ◽  
Short Period ◽  
Air Purifier ◽  
Carbon Dioxide Co2

Children inhale indoor air at 400 mL/min∙kg per body weight, 2.76 times more than adults. They have weaker immunity than adults and are more exposed to asthma, allergies, and atopic diseases. The objective of this paper is to suggest effective management and improvement measures for indoor air quality for nurseries. As a methodology, 16 nurseries (total of 35 classrooms) were selected to measure the indoor air quality compared with WHO IAQ Standard, and identify the daily concentration change of the pollutants. Based on the measurements, IAQ improvements for selected facilities are carried out to compare the results before and after improvement. The result has shown that the concentration of Carbon Dioxide (CO2), Total Volatile Organic Compounds (TVOC), Total Suspended Particles (TSP) and formaldehyde (CH2O) exceeds WHO IAQ standards. The concentration of CO2 and TSP is changed mainly by physical activity of children and that of CH2O and TVOC is changed mainly by ventilation after school start. TVOC decreased by 46.4% and the TSP decreased by 21.7% after air purifier, but CH2O and TVOC increased 1.8–3.8 times after interior renovation with low-emission finishing materials. After new ventilation installation, the CH2O and TVOC reduced half and the TSP reduced one third. It is proven that the most effective way to reduce the concentration of air pollutants in nurseries is the installation of a new ventilation system, followed by an air purifier. The renovation with low-emission finishing materials cannot improve IAQ in a short period of time.

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