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Multiparameter water quality heavy metal automatic online monitor based on anodic stripping voltammetry

A technique of anode stripping voltammetry and multi-parameters, applied in the direction of material electrochemical variables, etc., can solve the problems of poor electrode reproducibility, narrow measurement range, high liquid-feeding precision electrolytic cell structure, etc., and achieve the effect of simple device and low reagent consumption

Inactive Publication Date: 2012-05-09
QINGDAO JIAMING MEASUREMENT & CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the anode stripping voltammetry is really used for online monitoring of heavy metals in water quality, it still faces some new problems, such as narrow measurement range, poor electrode reproducibility, high requirements for liquid inlet accuracy and electrolytic cell structure, etc.

Method used

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  • Multiparameter water quality heavy metal automatic online monitor based on anodic stripping voltammetry
  • Multiparameter water quality heavy metal automatic online monitor based on anodic stripping voltammetry
  • Multiparameter water quality heavy metal automatic online monitor based on anodic stripping voltammetry

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Implementation example 1: Simultaneous monitoring of copper, cadmium and lead in industrial wastewater

[0024] The waste water from a chemical battery manufacturer was taken and stored for later use after proper pretreatment.

[0025] Such as figure 1 As shown, the present invention is mainly composed of a display screen 1, an electrolytic cell 2, a precision injection pump 3, a sextuple solenoid valve 4, a peristaltic pump for liquid intake 5, a peristaltic pump for liquid discharge 6 and a reagent box 7.

[0026] At the beginning of the test, the peristaltic pump 5 sucks distilled water into the pipeline for overall pipeline cleaning, and then sucks the pretreated water sample into the pipeline for rinsing the pipeline. Then inhale 20mL water sample into the electrolytic cell 2, and inhale the reagent coating solution and electrolyte used in the test into the electrolytic cell in proportion, and then start to use anodic stripping voltammetry to carry out electrochem...

Embodiment 2

[0027] Implementation example 2: Continuous automatic online monitoring of cadmium in industrial wastewater

[0028] Select an electroplating factory as the experimental point. After the installation is completed, set all the measurement parameters, and then use the standard solution to calibrate, respectively use the two pre-configured range calibration solutions to carry out the test described in Example 1, and record the peak position and peak value. Use the relationship between peak height and concentration to make a standard curve, and input the obtained curve parameters into the instrument. After the calibration is completed, customize the measurement cycle (12 times a day) and run automatically for one month. All the experimental data can be stored in the instrument, and all data can be comprehensively analyzed. It can be seen that the present invention can meet the requirements of continuous automatic online monitoring.

[0029] The above is only a partial implementat...

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Abstract

The invention relates to a multiparameter water quality heavy metal automatic online monitor based on the anodic stripping voltammetry. The monitor is characterized in that: the monitor comprises an electrochemical detection device, a control system, and a liquid charging device, a reaction device and a liquid discharging device which are respectively connected with the control system; the liquid charging device and the liquid discharging device, which jointly comprise peristaltic pumps, a precise syringe pump and six connection solenoid valves, are connected with the reaction device through pipelines to send a solution to the reaction device or discharge the solution from the reaction device; and the reaction device which is formed by inserted electrodes and an electrolytic cell with a stir bar provided therein is connected with the electrochemical detection device and can timely obtain effective data. By adopting the anodic stripping voltammetry in the invention, the simultaneous determination of multiple parameters can be realized, the reagent consumption is less, the apparatus is simple, the determination lower limit can be reduced by 2-3 orders of magnitude, and the chroma and the turbidity have no influences on the monitor, so the monitor can be used for the analysis of surface water and purified water.

Description

technical field [0001] The invention relates to a multi-parameter water quality heavy metal automatic on-line monitor based on anodic stripping voltammetry, which is suitable for the field of environmental water quality monitoring. Background technique [0002] In recent years, heavy metal pollution incidents have occurred frequently. Since 2009, more than 30 major heavy metal pollution incidents have occurred in China. Facing the high incidence of heavy metal pollution, the Chinese government has officially put the control of heavy metal pollution on the agenda. The "Twelfth Five-Year Plan" clarified the overall goals and policy directions for the prevention and control of heavy metal pollution during the "Twelfth Five-Year Plan" period in my country. Zhou Shengxian, minister of the Ministry of Environmental Protection, said in an interview with China Environment News that the goal of heavy metal pollution prevention and control during the "Twelfth Five-Year Plan" is to es...

Claims

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Application Information

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IPC IPC(8): G01N27/48G01N27/28
Inventor 高心岗隋宗斌赵军峰王志远郭松明程丽华朱果逸
Owner QINGDAO JIAMING MEASUREMENT & CONTROL TECH
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