活性氧化铝分离—分光光度法测定工业废水中Cr(Ⅲ)和Cr(Ⅵ)

SEPARATION WITH ALUMINIUM OXIDE(ACTIVE)——PHOTOMETRIC DETERMINATION OF CHROMIUM(Ⅲ) AND CHROMIUM(Ⅵ) IN INDUSTRIAL WASTE WATER

在0.001～0.01mol/L NaOH碱度条件下用活性氧化铝分离工业废水中Cr(Ⅲ)和Cr(Ⅵ),吸附的Cr(Ⅲ)用1mol/LH_2SO_4从柱上洗脱,Cr(Ⅲ)和Cr(Ⅵ)分別用分光光度法测定。本法回收率为98～112％,相对标准偏差小于8％。

A description is given of the separation of Cr(Ⅲ) and Cr(Ⅵ) in industrial wastewaters with aluminium oxide(active) in 0.001—0.01 mol/L NaOH. The absorbed Cr(Ⅲ) was then recovered from the column by elution with 1 mol/L H_2SO_4. The Cr(Ⅲ) and Cr(Ⅵ) can be determined respectively by photometric method. The recivery of this method is 98～112％. The relative standard deviation is less than 8％.