Cr(VI) reduction in aqueous solutions by using copper smelter slag |
| |
| Institution: | 1. Energy School, Xi’an University of Science and Technology, Xi’an, 710054, China;2. Key Laboratory of Western Mines and Hazards Prevention, Ministry of Education of China, Xi’an, 710054, China;3. School of Resources and Safety Engineering, Central South University, Changsha, 410083, China;4. School of Civil, Environmental and Mining Engineering, University of Western Australia, Perth, 6009, Australia;5. College of Science, Xi’an University of Science and Technology, Xi’an, 710054, China;6. Department of Civil Engineering, Inha University, Incheon, 402-751, South Korea;1. School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China;2. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Cluster Ministry of Education, Guangzhou, 510006, PR China;3. Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou, 510006, PR China;4. Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou, 510006, PR China;1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, 650093, China;2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China;3. Department of Materials Science and Engineering, University of Toronto, Toronto, ON, M5S3E4, Canada;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China |
| |
| Abstract: | The ability of Copper Smelter Slag (CSS) to reduce Cr(VI) in aqueous solutions has been investigated. The extent of reduction is dependent on the amounts of acid and reductant, contact time, Cr(VI) concentration, temperature of the solution and particle size of CSS. The amount of acid is the most important variable affecting the reduction process. When twice the amount of acid required with respect to Cr(VI) was used, Cr(VI) in 100 ml solution (100 mg/l) was completely reduced in a contact period less than 5 min by a 10 g/l dosage of CSS. Reduction efficiency increased with increase in temperature of solution, showing that the process is endothermic. Reduced chromium, and iron and other metals dissolved from CSS were effectively precipitated by using NaOH or calcinated carbonatation sludge from sugar plant. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
