Abstract:

Nano-FeS sol has been used for treating simulated electroplating wastewater containing Cr (Ⅵ)，Cu²⁺，Ni²⁺ and complexing agent. The effects of nano-FeS sol dosage，pH，and reacting time on its treatment efficiency are investigated. The experimental results show that when pH is 3-6 under acidic condition，FeS sol is added according to 1.2-1.5 times of its theoretical dosage and reacting time 10-15 min，the Cr (Ⅵ )，Cu²⁺ and Ni²⁺ in the treated wastewater are all lower than 0.5 mg/L，meeting the requirements of the National Electroplating Wastewater Discharge Standards(GB 21900-2008).

Key words: ferrous sulphide, heavy metals, wastewater treatment

摘要：

采用纳米FeS溶胶处理含Cr(Ⅵ)、Cu²⁺、Ni²⁺和络合剂的模拟电镀废水,考察了纳米FeS溶胶用量、pH、反应时间对处理效果的影响。实验结果表明:在pH为3～6的弱酸性条件下,按理论用量的1.2～1.5倍加入纳米FeS溶胶,反应10～15 min,可使处理后废水中的Cr(Ⅵ)、Cu²⁺、Ni²⁺均低于0.5 mg/L,达到国家电镀废水排放标准(GB21900-2008)的要求。

关键词: 硫化亚铁, 重金属, 废水处理

CLC Number: 

• X703.1