Through field investigation and experimental analysis, the forms, contents distribution of heavy metals (Zn, Pb, Cu, Cd, Ni, Cr) in rhizosphere non-rhizosphere soils Miscanthus floridulus growing everywhere Tielongwei mine pond (sample plot 1), Caoduikeng tailings 2), Donghua 3) Small 4) Dabaoshan, Guangdong Province were studied. The results showed that main forms distributions are basically s...

Introduction of sahar in cage-cum-pond integration system of mixed-sex Nile tilapia was evaluated using 15 outdoor cemented ponds of 24 m2 (4.9m × 4.9m) size with 1.25 m water depth placing a cage of 1.2m× 1m × 1m size holding 1 m3 water at the center of each pond at Institute of Agriculture and Animal Science (IAAS), Rampur, Chitwan, for 158 days. The experiment was conducted in a completely r...

Phytoremediation is a technology that uses plants for the remediation of the contaminated soils, sediments, tailings, and groundwaters. In this work, the ability of TrifoliumAlexanderium for the phytoremediation of the tailings soil in the Anjir-Tange coal washing plant was investigated. For this purpose, Trifolium sp. was cultivated in three soils consisting of the tailings dam, an agricultura...

The determination of physical and mechanical properties bauxite residue plays an important role on the stability assessment tailing disposal dams. This paper studies composition, properties, shear strength, bearing capacity by laboratory field in-situ tests. near discharge point are mainly coarse particles, size particle far away from reservoir shows a decreasing trend. Through X-ray diffractio...

The overall objective of thickened and paste tailings disposal has been stated many times: it is to thicken a slurry the point where non-segregating, will beach form sloping, sub-aerial deposit. The advantages this type scheme have include higher density, strength (including avoidance slimes pond), improved seismic resistance, better closure rehabilitation prospects lower compressibility). ai...

The oxi-hydroxides, present at trace level in uranium mill tailings, are responsible of about 70% of the 226 radium sorption, half being fixed on crystallized forms. This radionuclide (half time = 1622y), present at high level (50 to 100kBq.kg), can be released in groundwater, involving a possible contamination of the food chain (actual concentration limit = 0.37Bq.l). So, it is very important ...

The heat extraction from the lower convective zone or storage zone of salinity gradient solar pond with corrugated bottom is investigated with the aim of increasing the overall efficiency of collecting solar radiation, storing heat and delivering this heat to different applications. The energy balance equations for each zone have been used to develop the expression of temperature distribution i...

To determine the feeding sites preferred by adult gold-spotted pond frogs, Rana plancyi chosenica, and the foods that induce favorable growth of the frogs in the laboratory, we conducted two separate experiments between 27 May and 12 July 2007 in a vivarium. In the first experiment, we counted the number of crickets eaten by four gold-spotted pond frogs in a 60 min period at four different feed...

More than twenty years after the last mining operations were completed in Hiendelaencina Mining District, it is necessary to carry out a geochemical characterisation of tailings stored two contiguous mine ponds. Both have significant amounts quartz, siderite, barite and muscovite show contents As, Ba, Pb, Sb Zn. The alkaline pH low electrical conductivity values, which support visual observatio...