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Current management of phosphate-bearing resources (mainly rock phosphates, RPs), which in fact are finite non-renewable sources, is quite far from the principles of sustainability and may cause an escalating price increase mainly because of increases in RP-processing costs. One of the most studied approaches in solubilization of insoluble phosphates is the biological treatment of phosphate-bearing materials. In this work, we propose a microbial extraction of phosphate from insoluble inorganic natural sources as a ...

Lead (Pb) mobility in soils and hence its availability for plant uptake may be influenced by several soil properties, some of which are modified by sludge application. It is therefore imperative to understand how these modified properties affect Pb concentrations in different geochemical fractions of sludge-amended soils. Vertisols are common in arid- and semi-arid areas and are used extensively for agriculture. This study aimed at determining the relationship between selected soil properties (pH, organic matter (...

Various heavy metals contained in fuel are released to environment at fossil fuels use. Mercury has come to front of public interest recently. The North West Bohemia region is an area with high potential concentration of Hg emission sources (open pit brown coal mines) and large combustion facilities (power and heat stations) combusting fossil fuels. Mercury is taken for one of the most environment loading matters because its stability and bioaccumulation potential of itself and its compounds. More detailed regulat...

In this study, some attention will be paid to the recent scientific and technological developments in waste stocks remediation. The consideration will be focused on this still not developed area of practical application of polymers as a first step towards remediation of polluted waste stocks. Some function and utility of organic polymers will be offered, which behave similarly to those naturally present in soils that are to be considered as potential substrata for remediation and rebuilding of depleted waste stock...

Sedimentation in water reservoirs is a serious problem observed throughout the world. Its reduction is critical to ensure sustained socio-economic development. Mangla reservoir, the largest earth filled reservoir in Pakistan, was completed in 1967 with a gross storage capacity of 7280x106m3. Over the years (1967-99), this dam has been plagued by a massive inflow of sediments resulting in a reduction of 19 \% of its total storage capacity. This led to not only a decreased water supply to the farming community but a...

The main problem of restoration of localities of the North Bohemian Brown Coal Basin is the occurrence of overburden rocks from the series of rocks of coal seams. Representative example of these localities is the Strimice dump. This report briefly summarises the history of reclamation of this dump. Main attention is devoted to the result of application of fertilizable rocks and to the results of the research of the area retained for natural succession.