Characteristics of tail pipe (Nitric oxide) and resuspended dust emissions from urban roads – A case study in Delhi city

2020 ◽  
Vol 17 ◽  
pp. 100653
Author(s):  
V. Dheeraj Alshetty ◽  
Sudheer Kumar Kuppili ◽  
S.M. Shiva Nagendra ◽  
Gitakrishnan Ramadurai ◽  
Virendra Sethi ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Dust Emissions ◽  
Tail Pipe

Ngs dust emissions caused by the climate change: A case-study of a mine in Russia’s far north

2021 ◽  
pp. 122-133
Author(s):  
D.V. Makarov ◽  
A.V. Svetlov ◽  
A.A. Goryachev ◽  
O.T. Konina ◽  
V.A. Masloboev
Keyword(s):  
Climate Change ◽  
Dust Emissions ◽  
Far North

scholarly journals Reducing chloride corrosion of stainless steel in the nuclear fuel manufacturing industry : an electrochemical-environmental perspective

2021 ◽  
Author(s):  
David Spence
Keyword(s):  
Nitric Oxide ◽  
Stainless Steel ◽  
Nitrous Oxide ◽  
Nitric Acid ◽  
Environmental Impacts ◽  
Nuclear Fuel ◽  
Manufacturing Industry ◽  
Acid Strength ◽  
Chloride Corrosion

Chloride extraction from nitric acid is an important technique for reducing corrosion of stainless steel. However, there has been a limited amount of research conducted in this area. Pumping ozone-enriched air through nitric acid is a corrosion reduction method that is widely used in the nuclear fuel manufacturing industry, including the Blind River Refinery (BRR), to purge chlorine gas out of the acid. However, this method has been shown to produce significant environmental impacts. Overall, it is an inconsistent and cost-deficient method for reducing chloride corrosion of stainless steel in nitric acid mediums below 7.2M (37.0% volume). This thesis builds on existing literature and demonstrates that oxidizing chloride ions in nitric acid using oxygen, nitric oxide and nitrous oxide is an efficient and cost-effective chloride extraction method for the case study (BRR). It was shown that the level of chloride extraction from nitric acid increased significantly when the acid strength was elevated above 8.4M (42.0%volume) and sparged with various oxidants. The most effective oxidants at this nitric acid strength were: oxygen, ozone, nitric oxide and nitrous oxide. Nitric oxide and nitrous oxide can be produced by sparging 43.0% nitric acid with air or sparging 43.0% nitric acid with NOx fumes. In terms of the BRR case study, it was shown that using operational-specific combinations of these methods can drastically reduce the environmental impacts associated with their chloride removal process; significantly increase the level of chloride extraction; reduce energy consumption and operating costs by as much as 54.0%; and reduce material requirements by as much as 80.0%.

The Reconstruction of Lead Contamination History Using Tree Ring, Jinan, China

2014 ◽  
Vol 668-669 ◽  
pp. 1526-1529 ◽  
Author(s):  
Wei Dong Gao ◽  
Wei Jiang ◽  
Xiao Jun Wang ◽  
Zhang Min ◽  
Tian Qi Xiong
Keyword(s):  
Tree Ring ◽  
Continuous Monitoring ◽  
Lead Contamination ◽  
Dust Emissions ◽  
Good Relationship ◽  
Platycladus Orientalis ◽  
Industrial Dust ◽  
History Of ◽  
Contamination History

In this document we analysis the lead contamination in tree ring of Platycladus orientalis and Poplar, and found that lead concentrations in contaminated tree rings has a good relationship with industrial dust emissions and automobiles, the lead contamination in tree ring can reconstruction the lead contamination history of Jinan. The case study in Jinan, showed that trees can provide continuous monitoring data for assessment of trace metal pollution in the future.

scholarly journals Dust Emission Monitoring in Cement Plant Mills: A Case Study in Romania

2021 ◽  
Vol 18 (17) ◽  
pp. 9096
Author(s):  
Cristian Ciobanu ◽  
Irina Aura Istrate ◽  
Paula Tudor ◽  
Gheorghe Voicu
Keyword(s):  
Working Conditions ◽  
Dust Emission ◽  
The Other ◽  
Air Emissions ◽  
Emission Sources ◽  
Cement Plant ◽  
Limit Values ◽  
Dust Emissions ◽  
Emission Limit

This paper presents aspects of monitoring material dust emissions from stationary emission sources (monthly dust measurements performed on cement mill stacks—mill outlet and separator outlet). Additionally, the Portland cement mill technological process (its component parts), as well as the solutions regarding the reduction of the air emissions level, following the emission limit values (VLE), established in the integrated environmental authorization (AIM) from a cement factory in Romania, were analyzed. The paper focused on analyzing the data obtained in three different years for PM10 and dust concentrations (2018–2020). For each year, the measurements have been done in 3 months, each in a different season. The average values for each year for working conditions were: 30.22 mg/m3 (2018), 27.38 mg/m3 (2019), and 27.51 mg/m3 (2020) for working conditions and for normal conditions: 34.22 mg/m3 (2018), 30.49 mg/m3 (2019), and 30.16 mg/m3 (2020). For all 3 years, the values measured in spring were higher than the other two, both for work and normal conditions.

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