scholarly journals NOX EMISSION MODELLING FROM INDUSTRIAL STEAM BOILERS

2015 ◽  
Vol 76 (1) ◽  
Author(s):  
Hairul Nazmin Nasruddin ◽  
Azman Azid ◽  
Hafizan Juahir ◽  
Ahmad Makmom Abdullah ◽  
Mohammad Azizi Amran ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Air Pollutants ◽  
Human Population ◽  
Nox Emission ◽  
Emission Rates ◽  
Total Emission ◽  
Short Term ◽  
Industrial Source ◽  
Steam Boilers ◽  
Emission Modelling

Previous researches often emphasize on the sources and effects of air pollutants in the environment and human population. A part of those studies were done in order to explore the spread or distribution pattern of those pollutants, especially regarding the emission from industrial steam boilers. It is very important to evaluate the transfer trend of air pollutants at both local and global scales. In this study, Industrial Source Complex Short Term Version 3 (ISCST3) model has been used to predict the distribution of NOx emitted from industrial steam boilers in the District of Hulu Langat, Selangor. The result of analyses indicates that the emission rates for steam boilers were ranging from 0.0083 kg NOx/hour to as high as 0.2771 kg NOx/hour while the total emission load was 1.9969 kg NOx­/hour. The evaluation on dispersion contour shows that the concentration of NOx was higher in 1-hour reading than 24-hour value. The highest concentration of NOx was predicted to be within 104.65 km2 from the sources of NOx (steam boilers).

A HYBRID GA FOR NOX EMISSION MODELLING IN POWER GENERATION PLANTS

2002 ◽  
Vol 35 (1) ◽  
pp. 431-436
Author(s):  
Jian-xun Peng ◽  
Steve Thompson ◽  
Kang Li
Keyword(s):  
Power Generation ◽  
Nox Emission ◽  
Emission Modelling

scholarly journals A Satellite Data-Driven Framework to Rapidly Quantify Air Basin-Scale NO<sub>x</sub> Emission and Its Application to the Po Valley during the COVID-19 Pandemic

2021 ◽  
Author(s):  
Kang Sun ◽  
Lingbo Li ◽  
Shruti Jagini ◽  
Dan Li
Keyword(s):  
Emission Rate ◽  
Control Measures ◽  
Nox Emission ◽  
Data Driven ◽  
Anthropogenic Emissions ◽  
Emission Rates ◽  
Po Valley ◽  
Basin Scale ◽  
Emission Changes ◽  
Business As Usual

Abstract. The evolving nature of the COVID-19 pandemic necessitates timely estimates of the resultant perturbations to anthropogenic emissions. Here we present a novel framework based on the relationships between observed column abundance and wind speed to rapidly estimate air basin-scale NOx emission rate and apply it at the Po Valley in Italy using OMI and TROPOMI NO2 tropospheric column observations. The NOx chemical lifetime is retrieved together with the emission rate and found to be 15–20 h in winter and 5–6 h in summer. A statistical model is trained using the estimated emission rates before the pandemic to predict the trajectory without COVID-19. Compared with this business-as-usual trajectory, the real 2020 emission rates show two distinctive drops in March (−41 %) and November (−35 %) that correspond to tightened COVID-19 control measures. The temporal variation of pandemic-induced NOx emission changes qualitatively agree with Google and Apple mobility indicators. The overall net NOx emission reduction in 2020 due to the COVID-19 pandemic is estimated to be 21 %.

scholarly journals Family Burden and Coping among Caregivers of Schizophrenia

2017 ◽  
Vol 4 (4) ◽  
Author(s):  
S. Geetha ◽  
Dr. M. V. Sudhakaran
Keyword(s):  
Human Population ◽  
Statistical Significance ◽  
Subjective Burden ◽  
Short Term ◽  
Care Giving ◽  
Primary Caretakers ◽  
Schizophrenic Patients ◽  
Coping Scale ◽  
And Coping

Schizophrenia is a strict mental disorder affecting about human population. Being chronic and often incapacitating, it extracts tremendous cost from patients, caregivers and society. Caregivers of patients with schizophrenia face stress and emotional hardship and are frequently forced to assume lifelong care-taking roles. Subjective burden refers to the caregivers’ short term and long term reactions to the patient’s symptoms and behaviors, and the care giving task resulting from it. Perceived distress and interpersonal strain are examples. It refers to the extent to which the care giver feels he or she is burdened. This study aims to conducted for analysis the burden and coping among caregivers of schizophrenia. This study conducted with 30 Schizophrenic patients and 30 primary caretakers of the patients, totally 60 samples were studied. The result shows that there is association between burden assessment schedules of caregiver with that of caregivers coping scale. It revealed statistical significance. Low coping score seen in caregiver who had high burden score. Lower burden score seen in caregivers who had high coping level.

scholarly journals Short-Term Effects of Ambient Air Pollution On Daily Emergency Room Visits for Abdominal Pain: A Time-Series Study in Wuhan, China

2021 ◽  
Author(s):  
Yaqi Liu ◽  
Yi Jiang ◽  
Manyi Wu ◽  
Sunghar Muheyat ◽  
Dongai Yao ◽  
...  
Keyword(s):  
Air Pollution ◽  
Time Series ◽  
Abdominal Pain ◽  
Air Pollutants ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Emergency Room Visits ◽  
Short Term ◽  
Time Series Study ◽  
Series Study

Abstract Background There are few studies focused on the correlations between ambient air pollution and abdominal pain, especially in emergency departments in China. Method: Daily data (from January 1, 2016 to December 31, 2018), including air pollution concentration (SO2, NO2, PM2.5, PM10, CO, and O3) and meteorological variables, for daily emergency room visits (ERVs) were collected in Wuhan, China. We conducted a time-series study to investigate the potential correlation between six ambient air pollutants and ERVs for abdominal pain and their effects, in different genders, ages and seasons. Results A total of 16,306 abdominal pain ERVs were identified during the study period. A 10-µg/m3 increase in concentration of SO2, NO2, PM2.5, PM10, CO, and O3 corresponded respectively to incremental increases in abdominal pain of 6.12% (95% confidence interval [CI]: -0.44-13.12), 1.65% (95%CI: -0.25-3.59), 1.12% (95%CI: -0.18-2.44), 0.38% (95%CI: -1.09-1.87), 9.87% (95%CI:3.14–17.05) and 1.11% (95%CI: 0.03–2.21). We observed significant correlations between CO and O3 and daily abdominal pain ERVs increase, and positive but insignificant correlations between the other pollutants and ERVs. The effects were stronger mainly for females (especially SO2 and O3) and younger people (especially CO and O3). The correlations of PM2.5 and PM10 were stronger in cool seasons, while the correlation of CO was stronger in warm seasons. Conclusion Our time-series study suggested that short-term exposure to air pollution (especially CO and O3) was positively correlated with ERVs for abdominal pain in Wuhan, China, and that their effects varied by season, gender and age. These data can add evidence on how air pollutants affect the human body, and may prompt hospitals to take specific precautions on polluted days and maintain order in emergency departments made busier due to the pollution.

scholarly journals Short-Term Effects of Ambient Air Pollution on Hospitalization for Respiratory Disease in Taiyuan, China: A Time-Series Analysis

2018 ◽  
Vol 15 (10) ◽  
pp. 2160 ◽  
Author(s):  
Lisha Luo ◽  
Yunquan Zhang ◽  
Junfeng Jiang ◽  
Hanghang Luan ◽  
Chuanhua Yu ◽  
...  
Keyword(s):  
Air Pollution ◽  
Time Series ◽  
Respiratory Disease ◽  
Air Pollutants ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
High Risk Population ◽  
Short Term ◽  
Ambient Air Pollutants ◽  
Short Term Effects

In this study, we estimated the short-term effects of ambient air pollution on respiratory disease hospitalization in Taiyuan, China. Daily data of respiratory disease hospitalization, daily concentration of ambient air pollutants and meteorological factors from 1 October 2014 to 30 September 2017 in Taiyuan were included in our study. We conducted a time-series study design and applied a generalized additive model to evaluate the association between every 10-μg/m3 increment of air pollutants and percent increase of respiratory disease hospitalization. A total of 127,565 respiratory disease hospitalization cases were included in this study during the present period. In single-pollutant models, the effect values in multi-day lags were greater than those in single-day lags. PM2.5 at lag02 days, SO2 at lag03 days, PM10 and NO2 at lag05 days were observed to be strongly and significantly associated with respiratory disease hospitalization. No significant association was found between O3 and respiratory disease hospitalization. SO2 and NO2 were still significantly associated with hospitalization after adjusting for PM2.5 or PM10 into two-pollutant models. Females and younger population for respiratory disease were more vulnerable to air pollution than males and older groups. Therefore, some effective measures should be taken to strengthen the management of the ambient air pollutants, especially SO2 and NO2, and to enhance the protection of the high-risk population from air pollutants, thereby reducing the burden of respiratory disease caused by ambient air pollution.

The short-term effects of air pollutants on hospitalizations for respiratory disease in Hefei, China

2019 ◽  
Vol 63 (3) ◽  
pp. 315-326 ◽  
Author(s):  
Jingui Xie ◽  
Jie Teng ◽  
Yiming Fan ◽  
Ruijin Xie ◽  
Aizong Shen
Keyword(s):  
Respiratory Disease ◽  
Air Pollutants ◽  
Short Term ◽  
Short Term Effects
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