Chemical Products at the Vienna Exhibition

1876 ◽  
Vol 1 (13supp) ◽  
pp. 202-202
Keyword(s):  
Chemical Products

The Determination of the Noise Pollution in a Production Hall and the Diseases Produced by It

2018 ◽  
Vol 69 (4) ◽  
pp. 875-880
Author(s):  
Oana Roxana Chivu ◽  
Ovidiu Mederle ◽  
Augustin Semenescu ◽  
Ileana Mates ◽  
Claudiu Babis ◽  
...  
Keyword(s):  
Risk Factor ◽  
Human Body ◽  
Noise Level ◽  
Noise Pollution ◽  
Protective Measures ◽  
Work Program ◽  
Specialized Equipment ◽  
Chemical Products ◽  
Main Activity

The paper describes how to determine the noise in a production hall where there are production machines and equipment. The chosen plant is a production unit where filling of the polyurethane foam tubes is performed. The main activity is the production of professional insulators and wholesale of other products from the same range enumerating the following: wholesale chemical products; production of professional insulators; trade in chemicals and chemical industry. The recommended maximum admissible value for a normal 8h work program is 85 dB (A). The objective is to determine the level of noise in the factory and how it acts as a physical professional risk factor and its effects on the human body. The way in which the proposed objective was achieved was to determine the value of the noise level with the specialized equipment. Following the determinations that will be presented in the following chapters, appropriate protective measures have been taken.

Up-flow roughing filtration: rehabilitation of a water treatment plant in Tarata, Bolivia

1998 ◽  
Vol 37 (9) ◽  
pp. 105-112 ◽  
Author(s):  
Ana María Ingallinella ◽  
Luis María Stecca ◽  
Martin Wegelin
Keyword(s):  
Water Treatment ◽  
Pilot Plant ◽  
Laboratory Tests ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Horizontal Flow ◽  
Design Parameters ◽  
Sand Filters ◽  
Chemical Products ◽  
Made In

This paper presents the methodology used for the rehabilitation of the pretreatment stage in a water treatment plant for a village located in Bolivia which has 3500 inhabitants. The treatment plant was initially composed by horizontal-flow roughing filters and slow sand filters, but due to the high contents of colloidal turbidity of the providing source, it did not work properly. A plan of rehabilitation was made which comprised laboratory tests, pilot tests and proposal of modifications based on the results of previous stages. The laboratory tests were made in order to find the optimum conditions to coagulate the raw water. It was found that horizontal-flow roughing filters must be turned into up-flow roughing filters, so a pilot plant was built and was operated for three months in order to find suitable design parameters. The results obtained obtained during the operation of the pilot plant and the proposal of modifications are presented. The results of operation of the final plant, which are also reported, demonstrated the advantages of the up-flow roughing filtration as a pretreatment stage when it is necessary to add chemical products in small treatment plants.

scholarly journals Responsibility for chemical exposures: perspectives from small beauty salons and auto shops in southern metropolitan Tucson

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Amanda A. Lee ◽  
Maia Ingram ◽  
Carolina Quijada ◽  
Andres Yubeta ◽  
Imelda Cortez ◽  
...  
Keyword(s):  
Small Businesses ◽  
Chemical Exposure ◽  
The United States ◽  
Power Structures ◽  
Structured Interviews ◽  
Chemical Exposures ◽  
Study Partner ◽  
Chemical Products ◽  
Beauty Salons ◽  
Exposure Risks

Abstract Background Throughout the United States, low-wage, minority workers are disproportionately affected by occupational illnesses and injuries. Chronic exposure to hazardous chemicals at work can lead to serious illnesses, contributing to health inequities. In this article, we expand on theories of ‘responsibilization’ in an occupational health context to reveal how responsibilities for workplace chemical exposures are negotiated by workers and owners in Latinx-owned small businesses. Methods We conducted semi-structured interviews with a total of 22 workers and owners in auto repair shops and beauty salons – two high-risk industries – in Southern Metropolitan Tucson. Participants were asked about their insights into workplace chemical exposures and health. A qualitative analysis team with representation from all study partner organizations collectively coded and reviewed the interview data in QSR International’s NVivo 11 and identified overarching themes across the interviews. Results We identified three primary themes: 1) ambivalence toward risks in the workplace; 2) shifting responsibilities for exposure protection at work; and 3) reflections on the system behind chemical exposure risks. Participants discussed the complexities that small businesses face in reducing chemical exposures. Conclusions Through our analysis of the interviews, we examine how neoliberal occupational and environmental policies funnel responsibility for controlling chemical exposures down to individuals in small businesses with limited resources, obscuring the power structures that maintain environmental health injustices. We conclude with a call for upstream policy changes that more effectively regulate and hold accountable the manufacturers of chemical products used daily by small business workers.

scholarly journals Investigation into the Re-Arrangement of Copper Foams Pre- and Post-CO2 Electrocatalysis

Chemistry ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 687-703
Author(s):  
Jennifer A. Rudd ◽  
Sandra Hernandez-Aldave ◽  
Ewa Kazimierska ◽  
Louise B. Hamdy ◽  
Odin J. E. Bain ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Carbon Dioxide ◽  
Carbon Capture ◽  
Surface Composition ◽  
Structural Rearrangement ◽  
Copper Electrode ◽  
Copper Electrodes ◽  
Porous Copper ◽  
Chemical Products ◽  
Co2 Electrolysis

The utilization of carbon dioxide is a major incentive for the growing field of carbon capture. Carbon dioxide could be an abundant building block to generate higher-value chemical products. Herein, we fabricated a porous copper electrode capable of catalyzing the reduction of carbon dioxide into higher-value products, such as ethylene, ethanol and propanol. We investigated the formation of the foams under different conditions, not only analyzing their morphological and crystal structure, but also documenting their performance as a catalyst. In particular, we studied the response of the foams to CO2 electrolysis, including the effect of urea as a potential additive to enhance CO2 catalysis. Before electrolysis, the pristine and urea-modified foam copper electrodes consisted of a mixture of cuboctahedra and dendrites. After 35 min of electrolysis, the cuboctahedra and dendrites underwent structural rearrangement affecting catalysis performance. We found that alterations in the morphology, crystallinity and surface composition of the catalyst were conducive to the deactivation of the copper foams.

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