Study On The Real-Time Spectral Variation Of Typical Species In The Process Of Electrolytic Zinc Anode Sealing Lead

Lead is the top priority in pollution prevention and control of electrolytic zinc industry,and the lack of real-time monitoring technology is the main reason of heavy metal pollution in this industry.The electrolysis process of lead-based anode film sealing lead is a fast and continuous multi-element reaction unit.In the electrolyte,multi-ions coexist and the concentration span is large,in which the concentration of SO42-ions is up to 70-120g/L,the concentration of Mn2+ ions is 40±1g/L,and the concentration of Pb2+is 1-30 mg/L.Existing technology widely used spectroscopy,chromatography,mass spectrometry,or in the form of combination and off-line analysis or on-line detection,however,there are many preprocessing steps,complex operation and longtime consumption,leading to problems such as analysis results lag,secondary pollution and great analysis error,what more,it is impossible to carry out real-time monitoring of the original state,multi-component and cross-magnitude composite pollutants in the electrolyte,thus it impossible to guide the parameter regulation of the production process in real time to achieve the purpose of pollutant source reduction.In this paper,the typical species in lead-based anode film-sealing electrolyte were studied,and the real-time variation of the spectra of SO42-,Mn2+ and Pb2+ ions in the lead-based anode film-sealing electrolyte was studied by using spectrophotometer and uv-visible spectrophotometer in combination with the spectral original state direct measurement method by academician Duan Ning..First,by spectral color measurement meter for target element SO42-,Mn2+,Pb2+ spectral spectrum characteristic curve,the maximum absorption wavelength analysis different ion ? area and range,and then,using the UV-vis spectrophotometer accurately determine the maximum absorption wavelength of different ion ?max,and further research different optical path b ion of adaptation and adjustment reasonable reference solution,get different ion concentration under the condition of the best absorbance of Abs,finally,to establish a typical species C?A?C nonlinear quantitative mathematical model of the curve.It provides support for rapid direct measurement of the concentration of SO42-,Mn2+ and Pb2+ ions in high concentration complex electrolytic liquid system.Through the detection and analysis of typical species in the membrane sealing lead electrolyte,the results show that the standard recovery rate is 95.74%?103.07%,and the relative error is less than 2.3%,compared with ICP?AES,FAAS,ion chromatography,etc.,which has the advantages of fast detection speed,high accuracy,good stability and no secondary pollution.The core research results of this paper have been adopted in the real-time sample monitoring technology and equipment for electrolytic zinc industry with high concentration coexistence of multi-component ions,which has been realized the industrial demonstration in the China Siver group.The results show good application prospects.Figure[23]Table[20]Reference[106].