title: [Solidification/Stabilization of Chromite Ore Processing Residue (COPR) Using Zero-Valent Iron and Lime-Activated Ground Granulated Blast Furnace Slag].
abstract: The solidification/stabilization (S/S) of chromite ore processing residue (COPR) was performed using zero-valent iron (ZVI) and lime-activated ground granulated blast furnace slag (GGBFS). The degree of Cr immobilization was evaluated using the leaching procedure, mineral composition analysis and morphology analysis. Semi-dynamic leaching tests were implemented to investigate the potential for reusing the final treatment product as a readily available construction material. The results showed that after reduction, all of the S/S treated COPR samples met the pollution control limit of bricks and building block products (Chinese standard HJ/T 301-2007) produced with COPR for total Cr (0.3 mg x L(-1)), the compressive strength of all the S/S samples could meet the compressive strength standard (15 MPa) for producing clay bricks, and Cr existed as the specie that bound to Fe/Mn oxides in the S/S samples. At the same time, all of the S/S treated specimens tested were suitable for utilization at certain levels.
authors.forename: Zhong-lin
authors.initials: ZL
authors.lastname: Chen
authors.forename: Jin-chunzi
authors.initials: JC
authors.lastname: Li
authors.forename: Bin-yuan
authors.initials: BY
authors.lastname: Wang
authors.forename: Lei-tao
authors.initials: LT
authors.lastname: Fan
authors.forename: Ji-min
authors.initials: JM
authors.lastname: Shen
mesh_terms: D000538:Aluminum Silicates; D017610:Calcium Compounds / Q000737:chemistry*; D002857:Chromium / Q000032:analysis*; D000077215:Clay; D004785:Environmental Pollutants / Q000032:analysis*; D019652:Extraction and Processing Industry; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*
chemical_list: D000538:Aluminum Silicates; D017610:Calcium Compounds; D004785:Environmental Pollutants; D007220:Industrial Waste; D010087:Oxides; D002857:Chromium; C016538:lime; D007501:Iron; D000077215:Clay