Characteristics of Dust Events in China from 2015 to 2020

As the main source of dust in Asia, China often suffers from dust events. The temporal and spatial characteristics of dust events change with the variations of geography, climate and human activities. Based on the criteria of selecting dust events proposed recently by the China Environmental Monitoring Station, the hourly concentration of PM10 and PM2.5 of 336 cities in China from 2015 to 2020 were used to study the temporal and spatial characteristics of dust events more accurately and objectively. The results showed that all of the dust events in China clearly decreased, but the strong dust events did not decrease. There were 334 cities that had dust events except Shenzhen and Dongguan, 299 cities were seriously polluted due to dust events, 134 cities encountered dust level III and 56 cities encountered dust level IV. The high frequencies of dust events were mainly distributed in Northern China, especially in Northwest China. The dust contribution of PM10 to the cities in Northwest China was more than 10% and about 5–10% for PM2.5. The most likely month for dust was May. The starting time of dust was bimodally distributed, and the most common starting time was 10:00–11:00 BJT, followed by 22:00–23:00 BJT. According to the PSCF (Potential Source Contribution Function) results, the dust potential source contribution of different cities mainly came from the northwest, and was mainly affected by Mongolia in addition to the local dust in China. In addition, Beijing was obviously affected by dust recirculation. This study is of great significance to the improvement of the forecast of dust weather and the warning of heavy pollution caused by dust events.

Dust Aerosol trends over the Eastern Mediterranean region during 2003-2019

<p>Dust Aerosol Optical Depth (DAOD) is considered as one of the main sources of uncertainty in the assessment of climate change. In this talk, we present results of DAOD trend over the Eastern Mediterranean (EM) region in the dusty season (April- May- June- and July: AMJJ) during the years 2003-2019 using long-term DAOD from the Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2) and the Copernicus Atmosphere Monitoring Service Reanalysis (CAMSRA). MERRA-2 and CAMSRA DAOD displayed significant positive trends during the years 2003-2010 over the region at the rates of 0.007 year<sup>−1</sup> and 0.005 year<sup>−1</sup>, respectively. In contrast, significant negative MERRA-2 and CAMSRA DAOD trends occurred during the years 2010 -2017 with the rates of -0.009 year<sup>−1</sup> and -0.004 year<sup>−1</sup>, respectively. Moreover, trend analysis was also attempted for the Angstrom Exponent (AE<sub>440-870</sub>) and Fine Mode Fraction (FMF<sub>500</sub>) from 3 AERONET sits in the region.  AERONET data are compatible with the trend of MERRA-2 and CAMSRA DAOD. This suggests that the aerosols trend on the EM region is influenced by aeolian dust level.</p>

THE MONITORING SYSTEM OF INDOOR AIR QUALITY BASED ON INTERNET OF THINGS

The indoor air quality monitoring system is needed to find out good air condition. Good air condition can be seen from two (2) factors, namely dust, and temperature. Dust in a room can affect health if it exceeds the threshold of 0.15 mg/m3, and the temperature of 35oC has been determined by SK MENKLH No.02/MENKLH/I/1998. For that, we need a system that can determine the temperature and dust conditions in a room. The main objective of this research is to create an indoor air quality monitoring system based on the Internet of Things (IoT). This research uses engineering methods, which include planning, design, testing, and system implementation. In this system, when the dust level is more than 0.15 mg/m3 the LED indicator 1 and the active sprayer tell and neutralize the dust content in the air and when the intensity of the temperature is more than 35oC the LED indicator 2 and the active sprayer tell and neutralize the temperature intensity at the room. When both values exceed the set threshold, the LED indicators 1, LED 2, buzzer, the sprayer will be active simultaneously to notify and neutralize the air and temperature in the room. The test results show this system can work well with the percentage of errors in the testing of 12% for dust sensors and 1.6% for temperature sensors.

ENVIRONMENTAL MONITORING SYSTEM OF DUST LEVEL IN THE CONSTRUCTION ZONE AS A METHOD OF ECOLOGIZATION OF CONSTRUCTION PRODUCTION

The article analyzes the current state of environmental monitoring of atmospheric air near the construction or repair and construction works of the urban environment. The main direction of environmental monitoring in the context of local construction, i.e. the construction of housing complexes, micro districts where the construction site borders on already built and populated residential buildings, should be the control of air pollution, where special attention is paid to fine dust. Reliable monitoring of dust pollution in construction zones and adjacent territories is an important goal of improving the environmental safety of construction production.

RELATION OF WORKER CHARACTERISTICS AND PERSONAL DUST LEVEL TO THE VITAL LUNG CAPACITY OF WORKERS IN THE FURNITURE INDUSTRY

ABSTRACTFurniture industry is one of growing industry in Indonesia which has rapid growth. The process of its production brings one complex problem; wood dust. Workers who engage in the production process will have problem with their lung which can lead problem into their respiratory system. It is caused by the wood dust that mixed into oxygen they breath. Furthermore, if this condition happens in long period, it become a serious problem; impairment of vital pulmonary capacity. Besides, the impairment of vital pulmonary capacity can occur due to workers characteristics or conditions such as age, working history, working period, shelf period, illness history, smoking habit, diet, exercise, and the wearing of APD. The purpose of this research was to find out the relation between workers characteristics and personal dust level within vital capacity of lung. This research used cross sectional design with 17 respondents which was took by simple random sampling technique. This research took place at furniture industry X in Tubanan, Tandes, Surabaya, started from April to May 2018. Data was analysed using chi-square test and independent t-test with accuracy up to 95%. Data was collected through interview, observation, and measurement. The result of this research showed that there was correlation between working period, shelf period, and smoking habit within vital pulmonary capacity. The conclusion of this research was that working period, shelf period, smoking habit had important role to workers vital pulmonary capacity in furniture industry.Keywords: worker characteristics, wood dust, vital capacity of lung, furniture industry

Kemampuan Tanaman Kelapa Sawit Dalam Mereduksi Dust Fall Dari Perlintasan Transportasi Angkutan Batubara

Abilities Of Oil Palm In Reducing Dusk Fall In (Trasnportation) Track Coal. In generally air environment changes because air pollution, activity in coal transportation give an air pollution impact is the dusk along coal transportation track. One of the ways to handling the dusk with planting barrier who can reducing the dusk particles. This research aimed to know palm oil abilities in reducing levels of submerged dusk. Method in this research is analytic observation, with cross sectional survey design. Population and sample of this research is measured dust level measured at 5 research location that is 1 m, 50 m, 100 m, 150 m, and 200 m. Width distance barrier in every location be measured 2 point of sample is without barrier and with barrier which to do in 5 replications. For data analysis, researchers used T-test independent, simple regression test and same subject anova test. The result of this research showed that the difference between levels of submerged dusk without barrier and with barrier. There is an effect distance to levels of the submerged dusk in length 1 m 173,66 ton/km2/month showed that reduction in length 200 m 17,06 ton/km2/month. Palm oil proved that reducing levels of submerged dusk in length 100 m levels of submerged dusk under environment standard.

Worker Characteristics and Dust Exposure to Pulmonary Function Status in Jumping Saw Division Of Wood Industry At Banyuwangi: An Association Study

Wood dust in the air will bring serious health problems if it is prolonged. Wood Dust has effect for health due to its effect on , pulmonary function via respiratory system entrance. The aim of this study was to analyze the association of worker characteristics and dust exposure to pulmonary function status in jumping saw division workers in wood industry Sempu, Banyuwangi. The research was observasional with cross sectional desain. Research data was obtained by giving questionnaire to respondent, measurement of dust level by using HVAS and lung physiology examination using spirometry tool. The sampel in this research was 7 workers in the part of jumping saw and 6 worker in the part of office. Data were analyzed with chi square statistical test to analyzing the association and statistical t-test to analyzing difference pulmonary function status between to 2 groups. The result showed that dust level in the exposure groups of jumping saw workers was 19,90 mg/m3 and non-exposure group (office) was 0,089 mg/m3, suitable with Permenakertrans No. 13/MEN/X/2011 is 5 mg/m3. Results of lung function measurement showed that normal 15,38% and impairment 84,62%. It is concluded that no associoation between age, length of employment, smoking habit, respiratory ptotective equipment usage habit, respiratory diseases history and dust exposure to pulmonary function status, except association between nutrion status with pulmonary function status. The company should monitor the levels of wood dust, to ensure that it does not exceed the NAB and regular lung physiological health checks.

Justification of the Disk Tool Application for Working Bodies of Mining Machines

The dynamics analysis of coal mining and mine workings in Russia and Kuzbass was made with an assessment of operational productivity and load on fully-mechanized long-walls (FMLW). The article presents statistical data on the average number of FMLW and average monthly productivity of a miner. Disadvantages in the cutters work of working bodies of shearers and tunnelling machines during the mining of seams with a solid rock inclusions were determined. The usage of a disk tool instead of a cutter of working bodies of mining machines at operation at the mining enterprises of Kuzbass was offered in the article. The article recommends to expand the area of application of the mechanical method of coal seams and rocks destruction with a breaking down point of uniaxial compression up to 100 MPa by using a biconic disk tool of working bodies of extracting machines. Shearers’ tractive characteristics during mining of coal seams with rock inclusions, allowing to determine the energy intensity of destruction process by a disk tool were obtained. The options of design implementation of unified attachment points of a disc tool of working bodies of mining machines are presented. It was established that the main advantages of a disk tool over the cutter are the implementation of reversible modes of operation of working bodies, hardening and reducing dust level in face space.

ANALISYS OF DUST LEVELS AND MASKS USAGE BEHAVIOR ON RESPIRATORY DISORDER COMPLAINTS OF RICE MILLING WORKERS

Background: The Impementation of occupational safety and health at home industry in Ponorogo is not yet optimal, one of them is rice milling industry which produces rice dust during the production process. Dust levels that exceeds the threshold limit value may cause respiratory disoder complaints. The use of masks that conform with standard is one of way to reduce dust exposure to workers. The objective of this research is to analyze the dust level and masks usage behavior on respiratory disorder complaints of rice milling workers in Gegeran Village, Sukorejo, Ponorogo. Methods: This research used the observational analytical method with the cross-sectional design. Its population was 23 workers. The samples of research were taken by using the total sampling technique. Measurement of dust level used high volume sampler. Measurement of masks usage behavior and respiratory disorder complaints used questionnaire. Data analysis used Lambda test in SPSS program version 24. Result: Dust levels of rice milling indoor and outdoor exceeds the threshold limit values, each of them is 598,3 mg/m3 and 11,08 mg/m3. Score of use mask behavior is 72,5%. Rice milling workers that have respiratory disorder complaints is 19 workers (83%). The result of Lambda test shows that there is no significant correlation between dust levels and masks usage behavior with respiratory disorder complaints. Conclusion: Dust levels and masks usage behavior has no significant correlation to respiratory disorder complaints of rice milling workers in Gegeran Village, Sukorejo, Ponorogo.