摘要：

试验研究了化学混凝法对制革废水中Cr⁶⁺、总铬的去除效果及作用机理。实验结果表明:在硫酸亚铁投加质量浓度为400mg/L，pH为6.5，快速搅拌1min(搅拌强度250r/min)，慢速搅拌29min(搅拌强度65r/min)条件下，Cr⁶⁺、总铬去除率可分别达到97.2%、83.2%。比较不同的絮凝剂发现，聚合硫酸铁投药量较小，处理效果好，采用其去除制革废水中Cr⁶⁺及总铬经济、有效。

关键词: 化学混凝, 制革废水, 除铬

Abstract:

Cr⁶⁺ and total Cr are removed from tanning wastewater by chemical coagulation method. The results show that the dose of FeSO₄ is 400 mg/L, and pH is about 6.5. After being stirred quickly for 1 min and 250 r/min, then slowly for 29 min and 65 r/min, the removal rates of Cr⁶⁺ and total Cr are above 97.2% and 83.2% respectively. Treating tanning wastewater with PFS has the advantage of low cost and high effect.

Key words: chemical coagulation, tanning wastewater, removal of chromium

中图分类号: 

• X703.1