| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a more excellent method for treating cyan-containing waste liquid by which a poisonous cyan component can be effectively removed so as to make no cyan component remain, which has higher treatment safety than conventional methods and which is convenient and can be industrially utilized, and further to provide chemicals used therefor. <P>SOLUTION: The method for treating cyan-containing waste liquid is characterized in that at least one compound chosen from a group composed of a compound having an aldehyde group or a keto group and a hydrophobic group, a compound having a carboxyl group and a hydrophobic group, glyoxylic acid or its ester, ascorbic acid or its optical isomer, lignin or its derivative, humic acid or its derivative and reducing sugar is added to cyan-containing waste liquid and the waste liquid is held at pH 5 to 12 to cause reaction of cyan in the waste liquid with the chosen compound to produce cyanohydrin and the cyanohydrin is adsorbed to suspended matter and then adsorbed material is subjected to solid-liquid separation. Chemicals used for treating cyan-containing waste liquid is also provided. <P>COPYRIGHT: (C)2013,JPO&INPIT |
