title: Mercury leaching from hazardous industrial wastes stabilized by sulfur polymer encapsulation.
abstract: European Directive 2013/39/EU records mercury as a priority hazardous substance. Regulation n° 2008/1102/EC banned the exportation of mercury and required the safe storage of any remaining mercury compounds. The present work describes the encapsulation of three wastes containing combinations of HgS, HgSe, HgCl2, HgO2, Hg3Se2Cl2, HgO and Hg(0), according to patent of Spanish National Research Council WO2011/029970A2. The materials obtained were subjected to leaching tests according to standards UNE-EN-12457 and CEN/TS 14405:2004. The results are compared with the criteria established in the Council Decision 2003/33/EC for the acceptance of waste at landfills. The Hg concentrations of all leachates were <0.01mgHg/kg for a liquid/solid ratio of 10l/kg. All three encapsulated materials therefore meet the requirements for storage in inert waste landfills.
authors.affiliation: Centro Nacional de Investigaciones Metalúrgicas (CENIM, CSIC), Av. Gregorio del Amo, 8, 28040, Madrid, Spain. Electronic address: flopez@cenim.csic.es.
authors.forename: Félix A
authors.initials: FA
authors.lastname: López
authors.affiliation: Centro Nacional de Investigaciones Metalúrgicas (CENIM, CSIC), Av. Gregorio del Amo, 8, 28040, Madrid, Spain.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Alguacil
authors.affiliation: Instituto de Ciencias de la Construcción Eduardo Torroja (IETCC, CSIC), C/ Serrano Galvache, 4, 28033, Madrid, Spain.
authors.forename: Olga
authors.initials: O
authors.lastname: Rodríguez
authors.affiliation: Centro de Investigaciones Energéticas y Medioambientales (CIEMAT), Av. Complutense, 40, 28040, Madrid, Spain.
authors.forename: María José
authors.initials: MJ
authors.lastname: Sierra
authors.affiliation: Centro de Investigaciones Energéticas y Medioambientales (CIEMAT), Av. Complutense, 40, 28040, Madrid, Spain.
authors.forename: Rocío
authors.initials: R
authors.lastname: Millán
mesh_terms: D006256:Hazardous Waste; D007220:Industrial Waste / Q000032:analysis; D008628:Mercury / Q000032:analysis* / Q000737:chemistry; D017669:Mercury Compounds / Q000032:analysis / Q000737:chemistry*; D013457:Sulfur Compounds / Q000737:chemistry*; D064091:Waste Disposal Facilities; D018505:Waste Management / Q000379:methods*
chemical_list: D006256:Hazardous Waste; D007220:Industrial Waste; D017669:Mercury Compounds; D013457:Sulfur Compounds; D008628:Mercury
keywords: Encapsulation process; Leaching; Mercury; Waste