Relationship Between Gravimetric Respirable Dust Concentration and Midget Impinger Number Concentration

AIHAJ ◽  
1967 ◽  
Vol 28 (6) ◽  
pp. 554-556 ◽  
Author(s):  
Murray Jacobson ◽  
T. F. Tomb
Keyword(s):  
Number Concentration ◽  
Dust Concentration ◽  
Respirable Dust

scholarly journals Analisis Debu Respirable terhadap Masyarakat di Kawasan Perumahan Sekitar Lokasi Pabrik PT. Semen Padang

Jurnal Dampak ◽  
2017 ◽  
Vol 13 (2) ◽  
pp. 1
Author(s):  
Vera Surtia Bachtiar ◽  
Puspa Safitri Sanggar Rani
Keyword(s):  
Air Quality ◽  
Negative Impact ◽  
Ambient Air ◽  
Quality Standard ◽  
Residential Area ◽  
Dust Concentration ◽  
Respirable Dust ◽  
Ambient Air Quality ◽  
Housing Complex ◽  
Ambient Air Quality Standard

The purpose of this research are to analysis air quality and dust impact to people that came from factory activities at residential area around factory location of PT. Semen Padang. Measuring of air quality conducted in 3 residential area that are Komplek RW 1, RT 3 Batu Gadang district, Perumnas Indarung RW. VII, and housing of UNAND Blok D Gadut, using Personal Dust Sampler. The result is respirable dust concentration at housing complex RW. 1 RT. 3 Batu Gadang district that is 0,33 mg/m, the Perumnas Indarung RW.VII that is 0,55 mg/m along with housing of UNAND Blok D Gadut that is 0,44 mg/m. Concentration of dust respirable at all are still below ambient air quality standard that exist on PP RI No. 41 Tahun 1999, 3 mg/m. Based on quesioner and puskesmas data proximate with use univariat analysis, negative impact who feels people are impact of health is eyes irritation disease and impact of environment especially community-owned material. Keywords: air quality, negative impact, residential area, respirable dust, PT. Semen Padang ABSTRAKPenelitian ini bermaksud untuk menganalisis kualitas udara dan dampak negatif yang dirasakan masyarakat dari debu yang berasal dari aktivitas pabrik di kawasan perumahan sekitar lokasi pabrik PT. Semen Padang. Pengukuran kualitas udara dilakukan di 3 kawasan perumahan yaitu komplek perumahan RW. 1 RT. 3 Kelurahan Batu Gadang, Perumnas Indarung RW. VII, dan Perumahan UNAND Blok D Gadut dengan menggunakan alat Personal Dust Sampler. Diperoleh hasil konsentrasi debu respirable pada komplek perumahan RT.3 RW.1 Kelurahan Batu Gadang sebesar 0,33 mg/m, pada Perumnas Indarung RW.VII sebesar 0,55 mg/m serta pada Perumahan UNAND Blok D Gadut sebesar 0,44 mg/m. Konsentrasi debu respirable pada ketiga lokasi masih berada di bawah ambang batas baku mutu udara di lingkungan, 3 mg/m. Berdasarkan kuesioner dan data puskesmas terdekat dengan menggunakan analisis univariat, dampak negatif yang dirasakan masyarakat adalah dampak terhadap kesehatan berupa penyakit iritasi mata dan dampak terhadap lingkungan khususnya pada kondisi material yang dimiliki masyarakat.Kata kunci: kualitas udara, dampak negatif, kawasan perumahan, debu respirable, PT. Semen Padang

scholarly journals Exposure Assessment To Inhalable And Respirable Dust In The Post-Earthquake Construction Sites In The City Of L’aquila 

2019 ◽  
Author(s):  
Riccardo Mastrantonio ◽  
Angela Civisca ◽  
Tamara Lippolis ◽  
Enrica Inglese ◽  
Eugenio Siciliano ◽  
...  
Keyword(s):  
Geometric Mean ◽  
Crystalline Silica ◽  
Dust Concentration ◽  
Respirable Dust ◽  
Construction Sites ◽  
Mean Values ◽  
Silica Dust ◽  
Work Tasks ◽  
Inhalable Dust ◽  
The City

Abstract Following an earthquake occurred in the middle Italy in 2009, the involved territory hosted in ten years thousands of construction sites. The aim of this study is to assess the chemical exposure of the construction workers involved in the reconstruction of the city. To assess the exposure we collected 91 air samples to quantify the occupational exposure to airborne dusts and free crystalline silica dusts. Six construction companies joined the study and hosted the air sampling activities. We identified 4 work tasks: bricklayer and similar; scaffolder and carpenter; manual demolition; other tasks. Personal air sampling was performed by using the SKC AirCheck XR5000 sample pumps. Respirable dust and respirable crystalline silica dusts were collected by using a GS-3 Cyclones and 25 mm PVC filters; inhalable dust was collected by using a I.O.M. sampler and 25 mm PVC filters. The analyses were carried out by using gravimetric determination. Sampling time varied from 4 to 8 hours. The geometric mean values of inhalable dust concentration for the work tasks was: 3,65 mg/m 3 for scaffolder and carpenter; 18,16 mg/m 3 for manual demolition workers; 8,76 mg/m 3 for bricklayer and similar; 6,33 mg/m 3 for other work tasks. The geometric mean values of respirable dust concentration for the work tasks was: 0,67 mg/m 3 for scaffolder and carpenter; 0,92 mg/m 3 for manual demolition workers; 0,72 mg/m 3 for bricklayer and similar; 0,45 mg/m 3 for other work tasks. About the Crystalline Free Silica dust exposure, the average concentration in mg/m 3 was: 0,0038 for manual demolition workers, 0,0057 for scaffolder and carpenter, 0,004 for bricklayer and similar, 0,0035 for other tasks. The comparison of the results shows that manual demolition workers are exposed to considerably high levels of inhalable dusts, exceeding the ACGIH TLV-TWA limit of 10 mg/m 3 . About the respirable dust concentration, none of the work tasks dust concentration exceeded the ACGIH TLV-TWA limit of 3 mg/m 3 . Measurements of crystalline silica dust have shown levels below the threshold limit value of 0,025 mg/m 3 . This is in line with the average concentrations of respirable dust.

scholarly journals Experimental study of the dust-removal performance of a wet scrubber

2021 ◽  
Author(s):  
Shengyong Hu ◽  
Yang Gao ◽  
Guorui Feng ◽  
Fei Hu ◽  
Changhe Liu ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Water Intake ◽  
Dust Concentration ◽  
Dust Removal ◽  
Respirable Dust ◽  
Average Pressure ◽  
Total Dust ◽  
Air Volume ◽  
Wet Scrubbers ◽  
Wet Scrubber

AbstractA variety of dust control methods are often applied in coal mines, among which the application of wet scrubbers has proven to be an efficient technology for the removal of dust in airstreams, rather than diluting or confining the dust. In this paper, a wet scrubber design was developed. Based on a self-designed experimental test platform, the total dust concentration, respirable dust concentration, air volume, and average pressure drops of wet scrubbers with 12, 16, 20, and 24 blades were measured under different water intake conditions. The results show that the different water intake levels have only minimal effects on the air volume of the wet scrubbers. However, increased water intake had improved the dust removal efficiency of the wet scrubbers with the same number of blades. The wet scrubber with 16 blades was found to have the best dust removal efficiency at a water intake level of 1.35 m3/h. Its total dust and respirable dust removal efficiency reached 96.81% and 95.59%, respectively. The air volume was 200.4 m3/min, and the average pressure drop was determined to be 169.4 Pa. In addition, when the wet scrubber with 16 blades was applied in a coal preparation plant in China’s Shanxi Province, it was observed that the total dust concentration had fallen below 8.1 mg/m3, and the respirable dust concentration had fallen below 5.9 mg/m3. Therefore, the results obtained in this research investigation provide important references for the use of wet scrubbers to improve coal production environmental conditions.

scholarly journals Measurement of respirable dust concentration and assessment of health risk due to metals around an opencast coal mine of Talcher, Odisha

Geofizika ◽  
2019 ◽  
Vol 36 (1) ◽  
pp. 77-106
Author(s):  
Debi Prasad Tripathy ◽  
Tushar Ranjan Dash
Keyword(s):  
Particulate Matter ◽  
Trace Metals ◽  
Health Risk ◽  
Coal Mine ◽  
Dust Concentration ◽  
Respirable Dust ◽  
Risk Level ◽  
Opencast Coal Mine ◽  
Carcinogenic Effects ◽  
Safe Limit

Atmospheric pollution due to particulate matter in opencast coal mining area is a very important environmental problem and is fetching the attention of researchers worldwide since few decades. The particulate matter not only affects human but also have tremendous effects on nearby flora and fauna by degrading the ecological environment in many ways. High mechanization in mining operations leads to add heavy load of dust to the surrounding area. The adverse effects of dust depend on the quantity as well as the characteristics of the dust and the exposure dose. Taking the importance of the dust pollution in mines, a coal mine area of Talcher coalfield, was selected, which is one of the oldest coalfields of India and a very limited work has been carried out in that area on the regards of assessment of health risk due to metals on the local population. Monitoring of respirable dust (PM10 & PM2.5) were performed at eight monitoring stations around a high mechanised opencast coal mine for three seasons i.e., post monsoon, winter, and summer in the year 2015 as per the standard criteria of Central Pollution Control Board (CPCB), India. The seasonal variation of dust concentration was found in the order of winter > summer > post monsoon. Ten trace metals were analysed from the dust samples. Statistical analysis, such as, univariate (correlation study) and multi-variate analysis were carried out including principal component analysis (PCA) for source identification and respective contribution to particulate matter. Finally, the health risk in terms of hazards quotient (HQ) and hazards index (HI) were calculated for both children and adults for the three exposure path ways (Inhalation, ingestion and dermal exposure). The carcinogenic effects due to the presence of trace metals in the PM10 were evaluated for both children and adults in terms of excess cancer risk (ECR). The combined carcinogenic effects of all the trace metals also calculated (ECRtotal). The HQ values for Cr and Cd were found above the safe limit in that area for both children and adults. Likewise the ECR values for Cr and Cd also were at a very risk level for both the age group. However the risk related to other metals were found well within the safe limit. The HI and ECRtotal values were found above the safe limit which indicates the combined effect of trace metals on the children and adult were at and very high risk level in the study area.

scholarly journals Exposición Al Material Particulado En Las Áreas De Preparación De Material Abrasivo De Una Empresa En El Parque Industrial De Riobamba

2017 ◽  
Vol 13 (6) ◽  
pp. 224
Author(s):  
Diego Fernando Mayorga Pérez ◽  
Edwin Fernando Viteri Nuñez ◽  
María Verónica Albuja Landi ◽  
Javier Enrique Orna Chávez ◽  
Otto Fernando Balseca Sampedro ◽  
...  
Keyword(s):  
Gravimetric Method ◽  
Dust Concentration ◽  
Respirable Dust ◽  
Abrasive Material ◽  
Sampling Points ◽  
The Matrix ◽  
Corrective Actions ◽  
The Relationship ◽  
Dust Extractor ◽  
Statistical Criteria

In this research, a study of the determinants of risk and exposure on a particular matter was done in preparation for the areas of abrasive material. Qualification of chemical risks (inorganic powder) using the matrix triple irrigation was performed. In addition, the dust concentration in each position was evaluated using the rules NIOSH 0500 (total dust) and NIOSH 0600 (respirable dust) by statistical criteria NIOSH. Thus, their results are based on the gravimetric method. A sanitary survey to determine the relationship between the study variables with the powder was also performed. After examining the sampling points, 5 points was obtained with overexposure. As a result, a letter of commitment was made with corrective actions. It also re-monitors those exposed points overexposure resulting in a point (primary crusher). However, this works one to two times per month for 4 hours. As a result, no longer exposure would make production workers rotate jobs. Additional corrective actions, to further reduce exposure to dust extractor main advantage powders, were proposed. This, however, results in the generation of optimal environment for workers.

Analysis of Historical Worker Exposures to Respirable Dust from Talc Mining and Milling Operations in Vermont

2020 ◽  
Vol 64 (4) ◽  
pp. 416-429
Author(s):  
Alan Rossner ◽  
Pamela R D Williams ◽  
Elayna Mellas-Hulett ◽  
Mohammad Arifur Rahman
Keyword(s):  
Control Strategies ◽  
The United States ◽  
Arithmetic Mean ◽  
Crystalline Silica ◽  
Consumer Products ◽  
Dust Concentration ◽  
Mine Safety ◽  
Respirable Dust ◽  
Health Administration ◽  
Exposure Limits

Abstract Objectives Talc is mined and milled throughout the world for use in a variety of industrial and consumer products. Although prior studies have evaluated workplace exposures or health effects from talc operations, the primary emphasis of these investigations has been on certain mineral contaminants (e.g. crystalline silica and asbestos) rather than talc itself. The purpose of this analysis is to evaluate historical worker exposures to respirable dust (as a measure of talc exposures) in the Vermont talc mines and mills, which involved a relatively pure form of talc (i.e. no asbestos and <0.25% or <1% crystalline silica). Methods Respirable dust sampling data collected for workers in the Vermont mines and mills, which have not been previously published, were obtained from both mining company records and Mine Safety and Health Administration (MSHA) inspections. Because of differences in sampling design, the company and MSHA data were analyzed and reported separately. Overall, nearly 700 respirable dust samples collected for 44 job categories at 7 site locations over an approximate 30-year period were analyzed. Results Average respirable dust concentrations were found to exceed occupational exposure limits (OELs) in the United States and other countries for several job categories and site locations. Regardless of data source, the highest observed exposures were for mining jobs involving the operation of heavy equipment to break up, move, or load raw ore from the mines and milling or shipping jobs involving the crushing of raw ore, cleaning and drying of processed talc, and bagging and packaging of the final talc product. When analyzing the company data, the arithmetic mean respirable dust concentration was 2.73 mg m−3 for Muckerman at Hammondsville Mine, 3.18 mg m−3 for dosco operator at Ludlow mines, 1.35 mg m−3 for crusher operator at Gassetts Mill, 2.4 mg m−3 for palletizer at West Windsor Mill, and 2.68 mg m−3 for bagging operator at Columbia Shipping Center. When analyzing the MSHA data, the arithmetic mean respirable dust concentration was 3.5 mg m−3 for kiln/dryer operator at Hammondsville Mine, 1.27 mg m−3 for driller at Ludlow mines, 3.69 mg m−3 for ball mill operator at Columbia mill, 3.02 mg m−3 for flotation operator at West Windsor Mill, and 3.24 mg m−3 for bagging operator at Columbia Shipping Center. Worker exposures were found to decline over time for many, but not all, jobs. Conclusions Our findings highlight potential high-risk jobs that might benefit from additional exposure control strategies at current or future talc manufacturing sites. The respirable dust measurements summarized here may also be used to reconstruct historical worker exposures at the Vermont sites or aid in subsequent epidemiology studies of this cohort focused on malignant or non-malignant respiratory disease.

Factors Related to Pulmonary Function Status of Animal Feed Industry Workers in Surabaya

2020 ◽  
Vol 9 (2) ◽  
pp. 183
Author(s):  
Rieza Dwi Anggia
Keyword(s):  
Pulmonary Function ◽  
Animal Feed ◽  
Dust Concentration ◽  
Respirable Dust ◽  
Cross Sectional ◽  
Feed Industry ◽  
Lung Physiology ◽  
Worker Characteristics ◽  
Cross Sectional Design ◽  
Bacteria And Fungi

Introduction: Workplace air that contains dust and microorganism when inhaled by workers into respiratory tract can accumulate and cause lung function disorder. This study aimed to analyze the correlation between the concentrations of dust with the concentration of microorganism and analyze the association of worker characteristics, dust and microorganism concentration to lung physiology status. Method: This study adopted cross sectional design. The sample consisted of 24 workers who were randomly selected from factory and 10 workers who were totally selected from the administration area for respirable dust, microorganism concentration monitoring and workers’ characteristics data collecting. Result: Concentration of respirable dust has strong correlation with bacteria (rs = 0.704) and fungi (rs = 0.662) concentration. Variables that had significant association with pulmonary function status were age (p = 0.000), tenure (p = 0.008), the degree of smokers (p = 0.000), the dust concentration (p = 0.000), the bacteria concentration (p = 0.000), and the fungi concentration (p = 0.000), while the use of PPE mask (p = 0.890) had no significant association with pulmonary function status. Conclusion: Factors that related to pulmonary function status are age, tenure, degree of smokers, respirable dust, bacteria, and fungi concentration. Respirable dust concentration has significant positive correlation with bacteria and fungi concentration.Keywords: concentration of dust, concentration of microorganism, pulmonary function status

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