【求助】硫氰酸汞废液如何处理？

今天认真看了一下英文版的方法，发现废液中汞是以氯化汞的形式存在，而不是硫氰酸汞（Thiocyanate ion (SCN) is liberated from mercuric thiocyanate through sequestration of mercury by chloride ion to form un-ionized mercuric chloride. In the presence of ferric ion, the liberated SCN forms highly colored ferric thiocyanate in concentration proportional to the original chloride concentration. The color is measured at 480nm.）

因为自己的粗心大意误导大家了，抱歉
谢谢大家的建议~