Remediation of chromite ore processing residue by pyrolysis process with sewage sludge |
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| Authors: | Dalei Zhang Hainan Kong Deyi Wu Shengbing He Zhanbo Hu Xiaofang Hu |
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| Institution: | 1. School of Environmental Science and Engineering, Shanghai JiaoTong University, Shanghai 200240, China;2. School of Environment Studies, Guangxi University, Nanning 530004, China |
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| Abstract: | The present work developed a novel technique to treat chromite ore processing residue (COPR). The process involved mixing the COPR with sewage sludge followed by pyrolysis. The gaseous organic fraction generated during pyrolysis of sludge was beneficial to Cr(VI) reduction. Process variables, such as the amount of sludge added to COPR (sludge-to-COPR (S/C) ratio), heating temperature, reaction time and particle size, were systematically varied, and their influences on the Cr(VI) reduction in COPR were investigated. Cr(VI) content had decreased greatly, from 3384 mg kg−1 for untreated COPR to less than 30 mg kg−1 for COPR treated at 600 °C. |
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| Keywords: | Pyrolysis COPR Sewage sludge Reduction |
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