Novel Type of Sorbents Based on Sodium Polysulphide from the Wastes of Epichlorohydrin Production for Extracting Heavy Metal Compounds

A method was developed for obtaining granulated sulphur-containing sorbents with the use of wastes from epichlorohydrin production containing about 76 % of 1,2,3-trichloropropane was developed. The interaction between the wastes and sodium polysulphide is carried out in the presence of petroleum coke particles playing the role of polycondensation centres. The sorbents obtained are capable of extracting metals from aqueous solutions to exhibit the following sorption capacity (mg/g): Zn up to 74, Cd up to 31, Hg up to 152, Cu up to 25. The sorption mechanism is under discussion.