|
Korean Journal of Chemical Engineering, Vol.20, No.3, 482-486, 2003
Process Development for the Removal of Copper from Wastewater using Ferric/Limestone Treatment
The removal of copper from wastewater by ferric/limestone coagulation followed by screen filtration was carried out at a laboratory scale. The optimum coagulant (FeCl3) dose and working pH were 50 mg/l of Fe(III) and pH 7.5, respectively, through jar tests. For the efficient removal of copper from wastewater, we developed a novel process including the co-precipitation of copper with FeCl3, alkalization in a limestone aeration bed, and separation of precipitates in a sedimentation tank coupled with internal stainless steel screen filter. The performance results showed that removal of copper from the solution was over 99.5%. The pH was effectively maintained over 7.5 in limestone bed during the whole process. Ferric hydroxide/copper aggregates were removed over 99% by stainless steel screen filter of 1,450 mesh. Periodic air backwashing alleviated fouling of the filter surface.
[References]
- Agelidis T, Fytianos K, Vasilikiotis G, Jannakoudakis D, Environ. Pollut., 50, 243, 1988
- Al-Malack MH, Abuzaid NS, Elmubarak AH, Water Res., 33, 521, 1999
- Blanchard G, Maunaye M, Martin G, Water Res., 18, 1501, 1984
- Gloaguen V, Morvan H, J. Environ. Sci. Health Part A-Toxic/Hazard. Subst. Environ. Eng., 32, 901, 1997
- Gupta VK, Ali I, Sep. Purif. Technol., 18, 131, 2000
- Higgins TE, Sater VE, Environ. Prog., 3, 12, 1984
- Homburger F, Hayes JA, Pelikan EW, "A Guide to General Toxicology," KARGER, New York, 1983
- Jeon C, Park JY, Yoo YJ, Korean J. Chem. Eng., 18(6), 955, 2001
- Jiang JQ, Graham NJD, Water Res., 32, 930, 1998
- Kim SJ, Jeung SY, Moon H, Korean J. Chem. Eng., 15(6), 637, 1998
- Lee SH, Jung CH, Chung H, Lee MY, Yang JW, Process Biochem., 33(2), 205, 1998
- Martinez CE, Mcbride MB, Environ. Sci. Technol., 32, 743, 1998
- Plessis P, Maree JP, Water Sci. Technol., 29, 93, 1994
- Rao PR, Sitharamayya S, "Comparative Study of Different Techniques in the Removal of Heavy Metal Ions from Wastewaters," Proceedings of the Asia-Pacific Biochemical Engineering Conference, Dec. 1996, MasseyUniversity, New Zealand, 768, 1996
- Reed BE, Nonavinakere SK, Sep. Sci. Technol., 27, 1985, 1992
- Roques H, "Chemical Water Treatment," VCH Publishers, Inc., New York, 1996
- Rubio J, Tessele F, Miner. Eng., 7, 671, 1997
- Sim SJ, Kang CD, Lee JW, Kim WS, J. Environ. Sci. Health Part A-Toxic/Hazard. Subst. Environ. Eng., 36, 25, 2001
- Terashima Y, Ozaki H, Sekine M, Water Res., 20, 537, 1986
- The Korean Ministry of Environment, "Regulatory Limits for Drinking Water and Wastewater," J. Environmental Hi-technology, 4, 148, 1996
|