In the present study investigation of dustiness, performed at Public Limited Liability Company KLASCO, the Company of State Seaport of Klaipeda is described. During investigation the sources of dust formation and the main reasons, impacting the concentration of dust were analysed. Tests were performed at 12 points, located in two zones in the territory of the enterprise. Tests were also performed at the Terminal of Powdery Manure Discharge. Concentrations of dust of manure of potassium chloride during loading were measured. In order to evaluate impact of the enterprise, the data of measurements made at the same time in the northern part of Klaipeda city were used. The obtained data were demonstrated by Surfer 6 software. According to the isolines, analysis of dust spread was performed.
Soil is one of the most important natural subsystems of the Earth's landscapes, which is exceptionally vital for a human being as the main source of food resources. In order to take care of the future one of the most relevant problems of the mankind is to preserve soils of the Earth, their fertility and normal state under conditions of the increasing technogenic effect and degradation of natural landscapes. As the global warming has already started, its after‐effects, which will be invertable faced by the Lithuanian agriculture, must be overcome as an additional negative factor. The paper aims at revealing the dependence of the total carbon on pH. It also focuses on the impact of climate change on the total carbon and soil degradation. Santrauka Dirvožemis yra vienas iš svarbiausiu gamtiniu Žemes landšaftu posistemiu, išimtinai svarbus žmogui kaip pagrindinis maisto ištekliu šaltinis. Rūpinantis ateitimi, viena iš aktualiausiu žmonijos problemu – išsaugoti Žemes dirvožemius, ju derlinguma ir normalia būkle vis didejančio technogeninio poveikio ir gamtiniu landšaftu degradacijos salygomis. Kaip papildoma neigiama faktoriu privalu iveikti prasidejusio globalaus atšilimo pasekmes, su kuriomis neišvengiamai susidurs ir Lietuvos žemes ūkis. Straipsnyje siekiama atskleisti bendrosios anglies priklausomybe nuo pH, atkreipti demesi i klimato kaitos itaka dirvožemio degradacijai. Резюме Почва является одной из важнейших подсистем природных ландшафтов Земли, имеющей особенно важное значение для людей в качестве основного источника пищи. Одной из наиболее неотложных задач, стоящих перед человечеством, обеспокоенным своим будущим, является сохранение почв Земли, их плодородия и здорового состояния в условиях усиливающегося техногенного воздействия и деградации природного ландшафта. При этом придется преодолеть и уже начавшееся глобальное потепление, которое неизбежно коснется литовского сельского хозяйства. В статье предпринята попытка выявить зависимость общего углерода от рН, а также обратить внимание на последствия, наносимые изменением климата общему углероду, а также на деградацию почв.
Modelling of environmental noise is a process aimed at estimating the noise levels in an area of interest under a particular set of conditions. The aim of the work is to evaluate the impact of the planned reconstruction work on the change of noise level in Panevėžys city. The software MapNoise was used for modelling work. Strategic noise maps are updated on a regular basis and information dating back not more than three years will be used for their build. Values of emissions from each individual source of noise are summed up, thus obtaining the total value of emissions from different-composition traffic flow. As the performed theoretical and modelling work of the predicted noise level shows, the change of noise level is proportional to the change of a motor traffic flow, which is of particular relevance where the number of heavy weight vehicles significantly increases in the total traffic flow. The modelled noise level in Panevėžys city nearly fully corresponded to the theoretically predicted changes in noise levels with an error up to 5 dB(A).
Soil as an ecosystem is actively involved into climate formation process. Therefore, it is important to assess such soil quality indicators as total organic carbon (TOC) and CO2 emissions. Soil organic matter is considered to be its indicator of quality, which is one of the most important components of biosphere consistency and stability. Soil respiration shows carbon emission from soil into the atmosphere. This is a great indicator, illustrating soil biological activity. Impact of soil temperature, air humidity, time of day was evaluated on CO2 emission from the soil. The highest CO2 emission is observed in afternoon hours, up to 0.201 g CO2∙m–2·h–1.
No abstract
The conducted research has proved the dependence of gas flow rate in the separate channels of the two-level multichannel cyclone at a different inflow velocity and the number of channels. The carried out investigation demonstrates the dependence of changes in velocity in the channels under varying relations between peripheral and transitional flows. The work of a cyclone of the channel is based on centrifugal forces and an additionally occurring filtration process caused by the interaction between the flow coming from the later channel (peripheral) and the other floating towards the axis of the cyclone (transitional). The structure of the twolevel cyclone allows reaching higher gas (air) flow efficiency performing similar measurements of the applied equipment. New cyclones are designed upon the establishment of the tangential airflow and using the aerodynamic characteristics of the cyclones that have better efficiency than the ordinary ones. The aim of this research is to investigate changes in airflow rate at different levels of the cylindrical casing and their channels by regulating the half-rings of the multichannel cyclone, and changing relations of peripheral and transitional flows that get into the channels when the speed of the inflow/capacity of the cyclone varies. The maximum aerodynamic resistance is 1562 Pa when flow distribution ratio is 50/50 and inflow velocity is 15.3 m/s. According to the obtained experimental data, the effectiveness of cleaning the air flow polluted with the solid particles of more than 20 microns in diameter is up to 93% when the concentration of such particles in the airflow before cleaning is 5.9 g/m 3 .
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.