scholarly journals Study of the content of fluorides in atmospheric air in Bokhtar region and Tursunzade city of Tajikistan

2021 ◽  
Vol 2 (1) ◽  
pp. 11-18
Author(s):  
Khuseyn Egamnazarov ◽  
Babaev Ikram Islamovich ◽  
Aliev Samardin Partoevich ◽  
Abdullozoda Said Murtazo

Background: The emission and presence of air pollutants such as fluorides has over burdenized the public healthcare issues. The current study aimed to determine the content of fluorides in atmospheric air in Bokhtar region and Tursunzade city of Tajikistan. Methods: Based on the direction of wind, two zones were selected in the current study: experimental and control. In the first (experimental) zone, those areas were selected where the western, northern and northeastern directions of wind was significant. Dzhura Rakhmonov was assigned to the control zone with the shortest time for the eastward winds. In general, 72 samples of atmospheric air were taken in 12 settlements of the city of Tursunzade and 90 samples of atmospheric air in the Bokhtar region of the Khatlon province. To determine fluorine in air, a potentiometric method with an ion-selective electrode was used, which makes it possible to measure the potential concentrations of fluorides in atmospheric air. Results: Compounds of gaseous (hydrogen fluoride) and solid fluorine (salts of hydrofluoric acid), which are the main emission from various sources, were found in the atmospheric air of the populated areas of the city of Tursunzade, where the aluminum plant industry is located. The maximum amount of hydrogen fluoride in the experimental zone (Jamoat and Navobod) with a western wind direction was found in the autumn, which exceeded the MPC. However, the amount of solid fluorides in the western direction of the wind ranged from 0.01 to 1.0 mg / m3, which did not exceed the MPC value and was not significant. In control zone (Dzhura Rakhmonov) the said pollutants hydrogen fluoride and solid fluorine were not significant in autumn within accordance to MPC limit. The results of the study of atmospheric air in 15 administrative cities and districts of the Bokhtar region showed a complete absence of solid fluorides in all samples of atmospheric air. Conclusion: Compounds of gaseous fluorine and salts of hydrofluoric acid were found in the atmospheric air of populated areas of the city of Tursunzade, and no significant amounts in the Bokhtar region according to MPC and control. The maximum amount of fluorine compounds was found in the experimental zone (Jamoat Navobod) of the city of Tursunzade.

Author(s):  
Irina Glinyanova ◽  
Valery Azarov ◽  
Valery Fomichev

Fine dust: (PM2.5, PM10) is a priority pollutant that contributes to the development of numerous dis-eases in urban areas. The purpose of this scientific work is to study the dispersed composition of dust parti-cles on the leaves of apricot trees (Prúnus armeníaca) in the residential zone of Volgograd. The novelty of the work lies in the study of the dispersed composition of dust particles on the leaves of apricot trees (Prúnus armeníaca) in the residential zone in the city of Volgograd near the construction industry enterprise, me-chanical engineering, leather production and railway transport line in comparison with the conditionally clean (control) zone of the SNT “Orocenets” ”(Sovetsky District, Volgograd) from the standpoint of random functions expressed by integral distribution curves of the mass of particles over their equivalent diameters. As a result of the research, the dispersed composition of dust on the leaves of apricot trees (Prúnus ar-meníaca) in the residential area of Volgograd was revealed. Fine particles were found: PM2.5, PM10 in each of the studied points, which by their values, both in their number and mass fraction, significantly exceed the data on fine dust in a conditionally clean area (control) in the SNT “Oroshanets” (Sovetsky district Volgo-grad), which creates certain environmental risks for local residents. The dispersed analysis of particles from the standpoint of random functions in the future will allow with a sufficiently high degree of accuracy to pre-dict the dust content of urban atmospheric air in the range of monthly and / or seasonal average values compared to the traditional measurement of fine dust concentration in atmospheric air of the urban environ-ment as the maximum single or daily average. At the same time, further studies of dust on the leaves of plants in an urban environment, namely, the study of the density of its sedimentation, will also reveal a group of ur-ban plants that are best suited to retain PM2.5 and PM10 on leaf plates in this region, which can significantly increase the quality of the atmospheric air of the urban environment and be of a recommendatory nature for the state-owned landscaping services of the city of Volgograd when improving the green areas of a megacity.


REFORMASI ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 45-60
Author(s):  
Dewi Citra Larasati ◽  
Abd. Rohman

Permasalahan parkir di Kota Malang sangatlah kompleks, terlebih ketika adanya kenaikan tarif parkir di tahun 2015, menyebabkan muncul masalah-masalah lain yang lebih pelik, seperti tumpang tindihnya pengelolaan pajak parkir dan retribusi, munculnya juru parkir ilegal sampai dengan premanisme. Latar belakang tersebut membuat peneliti melakukan penelitian dengan tujuan untuk menganalisis pengelolaan tempat parkir di Kota Malang. Peneliti menggunakan metode kualitatif dengan pendekatan yang holistik mampu menghasilkan data melalui teknik pengumpulan data menggunakan triangulasi. Dari kegiatan penelitian ini adalah adanya tumpang tindih pengelolaan tempat parkir antara pajak parkir dan retribusi parkir dikarenakan adanya dua perauran daerah yang mengatur keduanya dan belum ada perwal yang mengatur tentang pengelolaan parkir sehingga muncul konflik internal di Organisasi Perangkat Daerah (OPD) yang mengelola parkir maupun konflik eksternal (masyarakat), selain itu minimnya pengawasan dan pengendalian terhadap juru parkir ilegal yang ada di Kota Malang.The problem of parking in Malang is very complex, especially when there is an increase in parking fees in 2015. this causes other more complicated problems, such as overlapping management of parking taxes and user fees, the emergence of illegal parking attendants to thuggery. This background makes researchers conduct research with the aim to analyze the management of parking lots in the city of Malang.Researchers use qualitative methods with a holistic approach that is able to obtain data with data collection techniques using triangulation. The results of this research are the overlapping parking management between parking taxes and parking fees due to the absence of guardians governing parking management so that internal conflicts arise in the Regional Apparatus (OPD) that manages parking and external conflicts (the public), besides the lack of supervision and control Illegal parking attendant in Malang city


2021 ◽  
Vol 92 (4) ◽  
pp. 461-477
Author(s):  
Lilian van Karnenbeek

Governments are increasingly facing conflicting land uses in cities. Many governments strongly aspire to provide green spaces for the public, yet simultaneously stimulate private preferences for real-estate development. This paper argues that examining the interrelationship between land ownership and control over land clarifies the provision of green spaces in the context of private preferences for development. It presents a case study of the Carré de Soie urban development in which the government aspires to an abundance of green but concurrently encourages the market to take the initiative. The findings show that the lack of public land ownership combined with private actors having a say in control over land fell short in satisfying public aspirations for green spaces. This paper concludes that if cities need to become greener, recognising the role of the government to act in the public interest is of utmost importance.


Urban History ◽  
2001 ◽  
Vol 28 (2) ◽  
pp. 161-179 ◽  
Author(s):  
Derek Keene

Water was essential to the commerce, sustenance and cleansing of medieval London and its inhabitants. The paper reviews technologies of supply, access and control, and the uses and risks associated with water during the city's formative period. It surveys the pleasures of water around the city, the paradoxes they involved, and the public supply as an expression of a growing civic culture. It emphasizes the interaction between natural environment, technology and institutions as a fruitful theme for medieval urban history.


2021 ◽  
Vol 13 (20) ◽  
pp. 11218
Author(s):  
Juan Díaz ◽  
Luis Montaño ◽  
Paul Salinas ◽  
Ángel Benítez

Air pollution is one of the main environmental problems in developed and developing countries. Epiphytic cryptogams (bryophytes and lichens) are proposed as a reliable indicator to detect environmental changes, given to their sensitivity to pollutants. In this study we evaluated air quality in the city of Ambato using bryophytes and epiphytic lichens on three land uses (urban, peri-urban and control). In each zone we selected ten trees (a total of 90 trees) for each station (a total of nine stations), where we recorded the frequency and cover of epiphytic cryptogams in a quadrat of 10 × 50 cm that was divided into 5 × 5 cm squares. Differences in richness, index of atmospheric purity (IAP) and diversity were analyzed using a generalized linear model (GLM) and changes in species composition using multivariate analysis. We recorded 39 species of cryptogams (25 lichens and 14 bryophytes). Richness, diversity and index of atmospheric purity were higher in the control zone compared to the urbanized zones. Community composition changed between the different zones, with increasing differences between the control and urban zones. The urban areas of the city of Ambato were identified with high levels of air pollution due to their lower diversity related to higher vehicular traffic and industrial activities (e.g., footwear and textile factories, tanneries). Thus, epiphytic cryptogams are a fast and low-cost method for air quality assessment in tropical areas.


2019 ◽  
Vol 72 (1) ◽  
pp. 118-124
Author(s):  
Nicole Jucá Monteiro ◽  
Luana Tainá Lima Amorim ◽  
Laura Maria Vidal Nogueira ◽  
Ivaneide Leal Ataíde Rodrigues ◽  
Suzana Rosa André

ABSTRACT Objective: To analyze women's perception of the quality of the service provided for colposcopy test in the city of Belém (PA), Brazil. Method: Quantitative-descriptive study on 400 women who underwent Pap test on the public healthcare network, using the Service Quality (SERVQUAL) model. We used the Cronbach's alpha index to measure the reliability of the scale, and data were analyzed by quartiles of the gaps of the dimensions: tangibility, responsiveness, reliability, assurance, and empathy. Results: The assurance dimension, corresponding to the knowledge and courtesy of staff, featured the highest degree of importance to users; and empathy, which corresponds to the staff's concern with women's needs, featured the lower degree. The most expressive negative gaps concerned the structure of services and the attitude of healthcare professionals when collecting the material. Conclusion: All gaps featured negative relationship between what was expected and perceived, expressing dissatisfaction regarding the service.


1999 ◽  
Vol 27 (2) ◽  
pp. 202-203
Author(s):  
Robert Chatham

The Court of Appeals of New York held, in Council of the City of New York u. Giuliani, slip op. 02634, 1999 WL 179257 (N.Y. Mar. 30, 1999), that New York City may not privatize a public city hospital without state statutory authorization. The court found invalid a sublease of a municipal hospital operated by a public benefit corporation to a private, for-profit entity. The court reasoned that the controlling statute prescribed the operation of a municipal hospital as a government function that must be fulfilled by the public benefit corporation as long as it exists, and nothing short of legislative action could put an end to the corporation's existence.In 1969, the New York State legislature enacted the Health and Hospitals Corporation Act (HHCA), establishing the New York City Health and Hospitals Corporation (HHC) as an attempt to improve the New York City public health system. Thirty years later, on a renewed perception that the public health system was once again lacking, the city administration approved a sublease of Coney Island Hospital from HHC to PHS New York, Inc. (PHS), a private, for-profit entity.


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