Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electrochemical stripping voltammetry for continuously measuring arsenic, stibonium and lead in mine groundwater

A stripping voltammetry and electrochemical technology, applied in the direction of material electrochemical variables, etc., to achieve the effect of simple operation

Inactive Publication Date: 2012-06-20
CENT FOR HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CGS
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been many reports on electrochemical methods for the individual detection of arsenic, lead, and antimony, but there has been no report on the continuous determination of arsenic, lead, and antimony concentrations using gold electrodes in the same electrolyte solution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrochemical stripping voltammetry for continuously measuring arsenic, stibonium and lead in mine groundwater
  • Electrochemical stripping voltammetry for continuously measuring arsenic, stibonium and lead in mine groundwater
  • Electrochemical stripping voltammetry for continuously measuring arsenic, stibonium and lead in mine groundwater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Pretreatment of gold electrodes

[0032] With 0.05mm Al 2 o 3 The polishing powder mechanically grinds the gold electrode on the polishing paper for about two minutes, and thoroughly washes the gold electrode with secondary water after polishing; then electrochemically oxidizes and reduces the gold, and polarizes the electrode at 2V and -0.35V for 10s by chronoamperometry, respectively. Then at 0.5 M H 2 SO 4 Scan the active electrode for 10 circles in a medium cycle (scanning range: -300~1600mV, scanning rate: 4V / s); finally, at 0.5 M H 2 SO 4 The treated gold electrode was characterized by cyclic voltammetry (scan range: -300~1600mV, scan rate: 0.1V / s), the counter electrode used in the experiment was a platinum electrode, and the reference electrode was a saturated calomel electrode;

[0033] 2) Continuous determination of the concentration of arsenic, lead and antimony:

[0034] a) Continuously measure the concentration of As(Ⅲ), Pb(Ⅱ) solution

[0035] Us...

Embodiment 2

[0051] Determination of Arsenic, Lead and Antimony in Groundwater Samples of Mine

[0052] Take 50ml of mine groundwater sample and add H 2 SO 4 , HCl and Na 2 S0 3 , H in solution 2 SO 4 Concentration is 1M, HCl concentration is 0.1M, Na 2 S0 3 The concentration is 1 mg / l. Heat to a slight boil for 10 minutes and cool to room temperature.

[0053] Continuous determination of concentration of As(Ⅲ), Pb(Ⅱ) solution

[0054] During the determination process, the treated gold electrode was selected as the working electrode, the saturated calomel electrode was used as the reference electrode, and the platinum electrode was used as the counter electrode. The measurement conditions are as follows:

[0055] Electrodeposition potential -0.3V, electrodeposition time 180s (stirring 180s);

[0056] Rest potential -0.3V, rest time 30s;

[0057] Scan rate 100mV / s, scan range -0.3V-0.4V;

[0058] The measurement conditions for the continuous determination of the concentrations ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an electrochemical stripping voltammetry for continuously measuring arsenic, stibonium and lead in mine groundwater, which utilizes a gold electrode as a working electrode and measures the concentrations of arsenic, stibonium and lead in a test sample solution by an electrochemical method; the method comprises the following steps of: pre-treating the gold electrode, firstly polarizing the electrode, and activating the electrode in a circular voltammetry; varying the potential of the gold electrode toward a negative potential direction, simultaneously depositing arsenic and stibonium on the surface of the gold electrode under the same potential, and measuring the total concentration of arsenic and stibonium by potential dissolution; and then, changing the deposition potential, singly depositing the stibonium, measuring the stibonium concentration by the potential stripping, and obtaining the arsenic concentration according to a difference value; firstly depositing the arsenic and lead on the gold electrode under the same potential, scanning the gold electrode toward the positive potential direction, separating out the arsenic and lead electrically deposited on the surface of the gold electrode under different potentials, and respectively measuring the concentrations of the arsenic and lead. The method provided by the invention has the advantages of continuously measuring the concentrations of arsenic, stibonium and lead in the same solution in a convenient and sensitive manner.

Description

technical field [0001] The invention relates to a method for measuring the content of arsenic, antimony and lead in water, in particular to a method for continuously measuring the content of arsenic, antimony and lead in underground water in mines. Background technique [0002] Heavy metal pollution is one of the biggest problems that endanger the environment. Arsenic, lead and antimony are important analysis items for environmental monitoring. Arsenic is an extremely harmful element that easily enters the human body through drinking water and food, and accumulates in the human body to cause arsenic poisoning and can cause death. Arsenic generally exists in water and soil in the form of sodium arsenite, diarsenic trioxide, and sodium arsenate in nature. Trivalent arsenic is more toxic than pentavalent arsenic, and inorganic arsenic compounds are more toxic than organic arsenic compounds. Lead is the largest amount of heavy metal pollution, and it is also one of the most ha...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N27/48G01N27/30
Inventor 史云赵学亮司士辉张岩岩
Owner CENT FOR HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CGS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com