• Proceedings of the Korean Institute of Resources Recycling Conference
• /
• 2001.05a
• /
• pp.543-546
• /
• 2001

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2014.11a
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• pp.86-88
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• 2014

니켈도금폐액은 재자원화되지 못하고 대부분 외부로 위탁 폐수처리되고 있으며, 고가의 금속인 니켈을 회수되지 못하고 버려지고 있는 실정이다. 이에 니켈도금폐액으로부터 니켈을 회수하고, 회수된 니켈을 이용하여 니켈화합물을 제조하여 니켈도금폐액을 재자원하는 기술을 개발하였다.

• Korean Journal of Environmental Biology
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• v.34 no.2
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• pp.124-131
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• 2016

The toxic responses of flagellate Euglena agilis Carter to 8 heavy metals (Ag, Cd, Cr (VI), Cu, Hg, Ni, Pb, Zn) were measured using E. agilis system (E-Tox), an automated biomonitoring system. The E-Tox measures cell movement parameters, such as velocity, motility, and forms of the cells, as biological endpoints. $EC_{50}$ values from the E. agilis biomonitoring test were compared with the literature data from the tests with Daphnia magna, Vibrio fischeri and Euglena gracilis. Measurement of the E. agilis movement behavior and D. magna acute toxicity test were also conducted for the wastewater samples. E. agilis is less sensitive than D. magna but is comparable to or more sensitive than V. fischeri and E. gracilis for the heavy metals tested in this study. E. agilis shows prompt changes of these parameters for the toxic metal plating wastewater. Major advantages of the E-tox are automatic, easy to handle and fast ecotoxicity monitoring system compared to other biological test systems. These results imply that E. agilis biomonitoring test using E-Tox can be a putative ecotoxicity test as a good early warning tool for the monitoring of toxic wastewater.

• Environmental engineer
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• s.13
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• pp.27-31
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• 1987

• Environmental engineer
• /
• s.14
• /
• pp.30-34
• /
• 1987

• Bulletin of Korea Environmental Preservation Association
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• v.8 no.21
• /
• pp.27-30
• /
• 1986

• Environmental engineer
• /
• s.8
• /
• pp.16-16
• /
• 1986

• Bulletin of Korea Environmental Preservation Association
• /
• v.9 no.2
• /
• pp.24-30
• /
• 1987

• Environmental engineer
• /
• s.12
• /
• pp.33-37
• /
• 1987

• Applied Chemistry for Engineering
• /
• v.20 no.3
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• pp.301-306
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• 2009

This research was carried out to establish the effective treatment condition and characteristic of wastewater from the electroplating plant of cold rolling mill by using microorganism. Alkaline wastewater and acidic heavy metal wastewater accounted for 64%, 30%, respectively, of the total wastewater. Highly concentrated thiocyanate was 53890 mg/L as COD and it was 53% of total COD, even though it was 0.03% of wastewater from the electroplating plant. When treating mixed wastewater with microorganism, it was easy to remove when SCN concentrations of mixed wastewater was 200 mg/L or less. While the treatment effect of COD-causing materials was low at the concentration of 400 mg/L or less, it implies that highly concentrated thiocyanate contains a large amount of slowly biodegradable organics. When treating with mixed wastewater, pH was 7.33 at the beginning, but after 8 hours it increased to 7.99. This is caused by ammonia which is generated when SCN of highly concentrated thiocyanate was degraded by microorganism.