Disposal of hazardous wastes containing heavy metals and their salts, by means of the modified sulfur.
Disposal of hazardous wastes containing heavy metals and their salts, by means of the modified sulphur solves the problem of accumulation of dangerous waste companies. As a result of chemical reaction of sulphur with the metals formed sulphides, which in contrast to metals, are absolutely safe for humans.
Disposal of hazardous wastes containing heavy metals and their salts, by means of the modified sulphur solves the problem of accumulation of dangerous wastes of ferrous and nonferrous metallurgy, quarries and mines for the extraction of polymetallic ores. Also, a large number of heavy metals contained in slag, ash and fly ash of coal-fired boilers, thermal power plants, and incinerators that can be recycled using this technology.
In order to understand the essence of this technology, you need to remember your school program of chemistry, namely that sulfur is a natural polymer with a melting point of 118-120 OS, one of the most common elements of the periodic table on Earth. Sulfur has certain properties that make it a truly unique chemical element. One of them is sulfur, when heated, chemically reacts with all metals, including heavy. The exception is mercury, which if rubbed with grey, come to her in a chemical reaction, even at room temperature. As a result of chemical reaction of sulphur with the metals formed sulphides, which in contrast to metals, are absolutely safe for humans. For example, if mercury is an extremely toxic substance, the sulphide is completely harmless to humans – is a well-known cinnabar as a red pigment used for the production of dyes.
Thanks to the above property, sulfur (sulfur modified) can be used for processing (neutralization) of waste containing heavy metals and their salts. Thus, by reacting this waste will be absolutely safe for humans and the environment a commodity product – a concretein which the sulphides formed as a result of the interaction of heavy metals with sulfur will be in encapsulated form to act as a filler and aggregate.
Of produced sulphur concrete while it is hot, you can immediately tformat any serebyany of the product, or to cool in the form of granules. Such sulfur containing composite is called pelletized sulfur concrete.
Comparison of the results of tests on leaching of metals and chemical compounds from samples of industrial wastes as well as from Sarabyanov, derived by reacting with the sulfur binder (modified sulfur) has shown that the effectiveness of the proposed method for different metals is in the range 90÷of 99.7%:
|Name||Content before neutralization, mg/kg||Content after neutralization, mg/kg||Efficiency, %%|
|Lead (Pb)||31,691||0,250||The 99.2|
|Vanadium (V)||5,001||0.197 inch||96,1|
|Molybdenum (Mo)||5,003||Of 0.085||98,5|