The waste-acid via salting out with NaHSO4 saturated solution to remove organicimpurity among it, then carry on recycle use.
通过硫酸氢钠饱和溶液盐析废酸，除去其中的有机杂质，使回收得到的硫酸重新投入循环生产中。
2
Mechanical impurity, colloid, iron, animalcule, algae and organic compound are the objects to remove by the pretreatment.
预处理系统的处理对象主要是进水中的机械杂质、 胶体、 铁、 微生物、 藻类、 有机物等。
3
GZT, a new organic depressor developed by Guangxi University, was used in the laboratory and industrial tests for reducing the impurity and improving the grade of Changpo Concentrator's lead-antimony.