论文部分内容阅读
一、对实验废弃物进行无害化处理①氰化物剧毒品的废液可先加入碱液,使金属离子沉淀而分离,调节pH至6～8,再往滤液中加入过量的NaClO或漂白粉Ca(ClO)2放置,使CN-氧化为氰酸盐并分解为无毒的N2等。反应式为:CN-+ClO-=CNO-+Cl-2CNO-+3ClO-+2OH-=2CO32-+N2↑+3Cl-+H2O②含汞废液可在pH为8～10时用过量的Na2S将Hg2+沉淀,也可以用NaHS为沉淀剂用明矾为絮凝剂,除汞率99％。残渣埋于地下。
First, the harmless treatment of experimental waste 1 waste liquid of cyanide highly toxic drugs can be added to the first alkali, the precipitation of metal ions and separation, adjust the pH to 6 to 8, and then add excess NaClO or bleach to the filtrate Place Ca(ClO)2 to oxidize CN- to cyanate and decompose it into non-toxic N2. The reaction formula is: CN-+ClO-=CNO-+Cl-2CNO-+3ClO-+2OH-=2CO32-+N2↑+3Cl-+H2O2 Wastes containing mercury can use excess Na2S at a pH of 8-10 Precipitation of Hg 2+ can also be performed using NaHS as a precipitant and alum as a flocculant, with a mercury removal rate of 99%. Residues are buried underground.