title: Treatment of chromite ore processing residue by pyrolysis with rice straw.
abstract: Chromite Ore Processing Residue (COPR) is the byproduct of chromate production process, which contains a large amounts of Cr(VI). The present work developed a new technique to treat COPR, and the process involved mixing the COPR with rice straw followed by pyrolysis. It was found that the gaseous organic fraction generated during pyrolysis of straw was beneficial to Cr(VI) reduction. In the study, process variables, such as the amount of straw added to COPR, heating temperature and particle size, were systematically varied, and their influences on the Cr(VI) reduction in COPR were all investigated. After pyrolysis, Cr(VI) decreased greatly, from 3400 for untreated COPR to less than 30 mg kg(-1) for treated COPR at 600 degrees C.
authors.affiliation: School of Environmental Science and Engineering, Shanghai JiaoTong University, Shanghai 200240, China.
authors.forename: Dalei
authors.initials: D
authors.lastname: Zhang
authors.forename: Shengbing
authors.initials: S
authors.lastname: He
authors.forename: Luwei
authors.initials: L
authors.lastname: Dai
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Hu
authors.forename: Deyi
authors.initials: D
authors.lastname: Wu
authors.forename: Kangjin
authors.initials: K
authors.lastname: Peng
authors.forename: Guanhuan
authors.initials: G
authors.lastname: Bu
authors.forename: Hao
authors.initials: H
authors.lastname: Pang
authors.forename: Hainan
authors.initials: H
authors.lastname: Kong
mesh_terms: D018533:Biomass; D002840:Chromates / Q000737:chemistry* / Q000302:isolation & purification*; D006361:Heating; D007220:Industrial Waste; D012275:Oryza / Q000737:chemistry*; D010316:Particle Size; D013696:Temperature
chemical_list: D002840:Chromates; D007220:Industrial Waste