Abstract:
An analytical method of the determination of Cr(Ⅵ)-content in deeply-dyed tannery wastewater with magnesia according to GB 7467-1987 has been established.The results show that the decolorization rate of deeply- dyed tannery wastewater reaches over 90% and the adsorption rate of Cr(Ⅵ)is below 4%.Within the Cr(Ⅵ)mass range of 8.306-41.53μg in 50 mL of solution,the linear regression equation is m=0.834 3+20.32ΔA(r=0.9999).The recovery rate of the labelled sample is 92.4%-97.6% and the RSD is 2.15%-4.37%.
Key words:
magnesia,
decolorization ,
chromium(Ⅵ),
tannery wastewater
摘要：
建立了以氧化镁为脱色剂，按GB 7467—1987标准测定深色制革废水中Cr(Ⅵ)含量的方法。实验表明:深色废水脱色率可达90%以上，Cr(Ⅵ)吸附率小于4%，当50 mL溶液中Cr(Ⅵ)质量在8.306～41.53μg时，回归方程m=0.834 3+20.32ΔA(r=0.999 9)。样品加标回收率为92.4%～97.6%，相对标准偏差为2.15%～4.37%。
关键词:
氧化镁,
脱色,
六价铬,
制革废水
CLC Number:
Wu Ningkun, Hu Minjie, Sun Jing, Shao Shuangxi. Determination of Cr(Ⅵ)-content in deeply-dyed tannery wastewater[J]. INDUSTRIAL WATER TREATMENT, 2008, 28(3): 67-69.
邬宁昆, 胡敏杰, 孙静, 邵双喜. 深色制革废水中Cr(Ⅵ)含量的测定[J]. 工业水处理, 2008, 28(3): 67-69.