An on-site visual detection method for heavy metal arsenic in environmental water samples
A detection method and heavy metal technology, applied in the direction of measuring devices, electrochemical variables of materials, instruments, etc., can solve the problems that limit the development of arsenic removal methods
Active Publication Date: 2020-08-04
ZHENGZHOU YU CHI TESTING TECH
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Problems solved by technology
[0004] Commonly used detection methods for arsenic content in water mainly include spectrophotometry, arsenic spot method, catalytic oscillographic polarography, and hydride-atomic fluorescence method, etc., but these methods can only measure the arsenic content in water, and cannot Study on the removal method and effect of arsenic in water while measuring, which limits the development of arsenic removal in water
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[0035] Such as figure 1 A kind of on-the-spot visual detection method of heavy metal arsenic in the shown environmental water sample comprises the following steps:
[0036] Step 1: Take 100mL of the water sample to be tested into a clean reaction container, put 0.84g of manganese dioxide into the reaction container, adjust the pH value of the water sample to be tested to 2-5, after the adjustment is completed, pass through the water sample to be tested Inject oxygen, control the gas flow rate to 5L / min, aeration temperature to 36°C, and aeration time to 10min. After the aeration is completed, the oxidized water sample is obtained;
[0037] Step 2: Adjust the pH value of the oxidized water sample to 2-5. After the adjustment is completed, put 0.10g of modified manganese dioxide into the oxidized water sample as an arsenic adsorbent. The adsorption time is 30min and the adsorption temperature is 25°C , after the adsorption is completed, the solid-liquid is separated to obtain t...
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The invention discloses a field visualizing detection method for heavy metal arsenic in environment water samples. The field visualizing detection method comprises the following steps of adsorbing theheavy metal arsenic in the environment water samples by modified manganese dioxide; adsorbing the environment water samples, subjected to primary adsorption, by modified natural coral for the secondtime; using a coulomb analyzer to measure the content of arsenic in each sample liquid. The field visualizing detection method has the advantages that by using the modified manganese dioxide and the modified natural carol, the pentavalent arsenic in the environment water samples is adsorbed; while the adsorption effect is measured, the purpose of detecting the heavy metal arsenic in the environment water samples is realized; a novel direction is provided for the detection and removal of arsenic in a water body.
Description
technical field [0001] The invention belongs to the technical field of environmental detection, in particular to an on-site visual detection method for heavy metal arsenic in environmental water samples. Background technique [0002] Arsenic, commonly known as arsenic, is a metalloid element. Arsenic exists widely in nature. Hundreds of arsenic minerals have been discovered. Its compound arsenic trioxide is called arsenic, which is a highly toxic substance. October 2017 On the 27th, the list of carcinogens released by the International Agency for Research on Cancer of the World Health Organization was initially compiled for reference. Arsenic and inorganic arsenic compounds were included in the list of carcinogens. [0003] Arsenic and its compounds are used in pesticides, herbicides, insecticides and many kinds of alloys. It is precisely because of the wide application of arsenic that the content of arsenic substances in water and soil increases year by year. The harm is h...
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IPC IPC(8): G01N27/42
CPCG01N27/423
Inventor 孙世民朱倩倩
Owner ZHENGZHOU YU CHI TESTING TECH