The studies were carried out on heavy metal bioavailability and leachability during water hyacinth composting mixed with cattle manure, sawdust and natural zeolite. The water hyacinth, cattle manure and sawdust were taken in the 6:3:1 ratio with 5, 10 and 15% natural zeolite and composted for 30 days. The concentrations of nutrients and total heavy metals were increased during the process. Due ...

In this study, the natural Cu background concentration and Cu natural and anthropogenic contamination in soil, water and crop were investigated systematically in Huangshi area. The results show that regional geology is the dominant factor controlling the natural Cu background concentration in soil and water, and that pH is important to control the vertical distribution of Cu in soil under the s...

Leptospira is an important re-emerging zoonotic human pathogen, disseminated by sick and carrier animals, water and soil. Weather calamities, such as flooding or cyclones favour the spreading of these bacteria. To check a potential role of natural water and soil in the persistence and spread of Leptospira on the territory of eastern Poland, 40 samples of natural water and 40 samples of soil wer...

In theories of word meaning and concepts, “water” has been taken as a key case of a natural kind term, and water of a natural kind. I address several questions including: What should a theory of the meaning of the word “water” look like, given observations about use of the word? Is there a category of liquids that is water, independent of the names used for the liquids? Given the considerations...

The mechanical design of hydraulic turbines is conditioned by the dynamic response of the runner that is usually estimated by a computational model. Nevertheless, the runner has complex boundary conditions that are difficult to include in the computational model. One of these boundary conditions is the water in which the runner is submerged. The effect of the added mass and damping of water can...

in this study we investigated the impacts of population increase on life quality, with a special focus on its impact on the natural resources and environmental issues. this analysis was conducted using data over a 16 year period. since water is one of the most important factors contributing to the growth and development of countries, the increase in population size, industry sector growth, urba...

We evaluated the impact of landscape changes on the amount of delta outflow reaching San Francisco Bay. The natural landscape was reconstructed and water balances were used to estimate the long-term annual average delta outflow that would have occurred under natural landscape conditions if the climate from 1922 to 2009 were to repeat itself. These outflows are referred to as natural delta outfl...

Decreased technological costs and increased efficiency of horizontal drilling has made obtaining natural gas from shale deposits through hydraulic fracturing a viable economic option. However, current estimates of per kWh costs to obtain natural gas through this method do not account for increased environmental risks. By incorporating damages from air and water pollution, the true cost of hydra...

The article assessed the condition of coherent properties experimental water samples from natural sources in comparison with results a biological growth test. Carried out кirlianographic (Ki-photograph) study 3 springs Skhidnitsa, including one sample pump room, were carried out. Present criteria for experimentally prepared using distilled (KGD) and drinking (KGP). According to data presented, ...