酸阻滞技术的研究与应用

本文提出酸阻滞法从废液中分离，回收重金属和酸的新技术工艺，从十多种国产树脂中成功地筛选出两种可作为酸阻滞剂，有较好的分离效果。但洗脱时酸脱尾严重，当选择穿透比在０．６左右时，可以解决酸脱尾现象，使脱尾酸损失由３０％降到７％，而酸的回收率由６０％提高到９０％，采用该工艺对几种废液进行处理，重金属回收液中酸去除率大于９５％，而回用酸中金属去除率大于７０％，该工艺既可回收重金属，同时也可回收酸。

STUDY AND APPLICATION OF TECHNIQUE OF ACID RETARDATION

The technique using acid retardation to retrieve heavy metal and acid from waste liquors was represented in this paper.Through screening more than a dozen of resins made in China,two types of resins were selected which provide satisfactory separation results.When eluting,however,acid- tailing was serious. This problem was solved by selecting a penetration ratio around 0.6.This has reduced the loss of acid through acid-tailing from 30%to 7%,hence increased the acid recovery from 60%to 90%.The new technique was applied to treat many kinds of waste liquors.Over 90% removal of acid from the heavy metals and over 70% removal of heavy metals from the recovered acids were achieved.Based on this technique The process can be used to recover both acids and heavy metals from waste liquors.