摘要：

在优化投加量的基础上，考察化学沉淀和颗粒活性炭（GAC）组合对二级出水树脂脱附液的处理及回用效果。结果表明，BaCl₂和CaCl₂投加量分别按n（Ba²⁺）：n（SO₄^2-）为0.9和n（Ca²⁺）：n（P）为0.6确定，GAC投加量为5 g/L。2次投加和1次投加药剂，无机阴离子和有机物去除效果无显著差异，残留Ba²⁺和Ca²⁺无明显增加。1次投加药剂处理脱附液回用时，8个周期内树脂的去除和再生效果良好。该组合方法处理脱附液并回用，减少了脱附液体积，还可降低处理成本。

关键词: 树脂脱附液, 化学沉淀, 颗粒活性炭, 回用

Abstract:

On the basic of optimal dosage, combination of chemical precipitation and granular activated carbon(GAC) for the treatment of resin regeneration effluent and recycle were studied. The results showed that BaCl₂ and CaCl₂ dosage were determined by n(Ba²⁺): n(SO₄^2-) of 0.9 and n(Ca²⁺): n(P) of 0.6, respectively. Moreover, the optimal dosage of GAC was 5 g/L. There was no significant difference in treatment effect of inorganic anions and organic matters was found between two-step and one-step adding reagent. Meanwhile, residual Ba²⁺ and Ca²⁺ concentration did not increase evidently. Within 8 adsorption-regeneration cycles, the resin had satisfactory removal and regeneration effect when the effluent was treated by one-step adding agents. The resin regeneration effluent can be treated and reused by combined method. Furthermore, it can reduce the volume of effluent and lower treatment cost.

Key words: resin regeneration effluent, chemical precipitation, granular activated carbon, recycle

中图分类号: 

• X703.1