摘要：

用自制的改性木质素磺酸盐处理电镀含镉废水,实验表明:在室温条件下,单体用量为1.5mol/L,反应48h时,可得到相对分子质量较大、絮凝效果较好的改性木质素磺酸盐。当pH控制在7,改性木质素磺酸盐用量80mg/L,絮凝60min,室温条件下,可使含镉废水中Cd²⁺的去除率达到99%以上。

关键词: 电镀废水, 镉离子, 木质素磺酸盐

Abstract:

The cadmium-containing wastewater in electroplating has been treated by flocculation with a kind ofhome-made flocculant.The results show that the modified lignosulfonate having bigger molecular and better flocculationeffect can be obtained,when the monomer dosage is 1.5 mol/L and reaction time is 48 h,at room temperature.Using the modified lignosulfonate for treating cadmium-containing wastewater,when its pH is 7，dosage of modified lignosulfonate 80 mg/L,flocculation time 60 min and at room temperature,the removal ratesof Cd²⁺ from cadmium-containing wastewater reaches more than 99%.

Key words: electroplating wastewater, cadmium ions, lignosulfonate

中图分类号: 

• X703.1