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Biodetoxification of silver–cyanide from electroplating industry wastewater
Author(s) -
Patil Y. B.,
Paknikar K. M.
Publication year - 2000
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1046/j.1472-765x.2000.00648.x
Subject(s) - cyanide , effluent , biodegradation , chemistry , wastewater , electroplating , bioassay , environmental chemistry , nuclear chemistry , rotating biological contactor , pulp and paper industry , inorganic chemistry , environmental science , environmental engineering , organic chemistry , biology , ecology , layer (electronics) , engineering
Y.B. PATIL and K.M. PAKNIKAR.2000.A bacterial consortium capable of utilizing metal–cyanides as a source of nitrogen was used to develop a microbiological process for the detoxification of silver–cyanide from electroplating wastewater. When the treatment was carried out in a 27‐l rotating biological contactor (RBC) in continuous mode, the system could achieve > 99·5% removal of 0·1 mmol l −1 silver–cyanide (≈ 5 mg l −1 cyanide and 10 mg l −1 silver) in 10 h with sugarcane molasses (0·1 ml l −1 ) as carbon source. The silver ions set free during biodegradation were efficiently adsorbed by the bacterial biomass. The RBC‐treated effluent was found to be safe for discharge into the environment, as confirmed by chemical analysis and fish bioassay studies.