Arsenic pollution refers to environmental pollution caused by arsenic or its compounds. The mining and smelting of arsenic and arsenic-containing metals, the production of glass, pigments, raw materials and paper with arsenic or deep compounds as raw materials, as well as the burning of coal and other processes can produce arsenic-containing wastewater and pollute the environment. Arsenic and arsenic can enter the body through water and cause harm. The toxicity of elemental arsenic is low, all the arsenic compounds are toxic, and the trivalent arsenic compounds are more toxic than other arsenic compounds.
So Just How Bad is Arsenic Contamination in Water?
(The following information is from the Internet)
In 2016, statistics show that nearly 150 million people in more than 70 regions around the world are threatened by high arsenic groundwater to varying degrees, arsenic pollution in Southeast Asia and Latin American countries is serious, and even developed countries such as the United Kingdom and the United States have also had arsenic poisoning caused by drinking water pollution.
Major networks have published a report titled “The voice of 200 million people around the world: Please give me a glass of arsenic-free water”, saying that about 200 million people around the world have excessive levels of arsenic in drinking water, and arsenic pollution is very serious in Southeast Asia and Latin American countries.
In addition, in an article entitled “Arsenic Contamination of Groundwater in China” published in the journal Science in August 2013 by scientists from several countries, it is revealed that, based on geological survey data and risk modeling analysis, nearly 20 million people in China are estimated to be at risk from arsenic contaminated groundwater, especially in rural areas that rely on groundwater for drinking water. The risk of arsenic exposure is posing a threat to public health. Thirteen provinces and regions, including Xinjiang, Inner Mongolia, Henan, Shandong and Jiangsu, have residential communities that use highly arsenic groundwater as drinking water sources, and the total population exposed to arsenic levels above 10 μg/ L exceeds 19 million people.
It can be seen that the content of arsenic in water is not without reason! In fact, Moody is very clear that water quality online monitoring is to ensure the safety of water quality, so as to achieve everyone’s aspirations of “give a cup of arsenic-free water”!
As for the detection of arsenic in water, of course, it is necessary to use water quality online monitoring equipment, Hangzhou Moody production of T8000-As water arsenic online analyzer can be used for online automatic detection of arsenic solubility in water in various industries. Molybdate/ascorbic acid colorimetry was used to detect arsenic in water. After the pre-treated water sample is injected into a special reactor by an injection pump, it is first reacted with a reducing agent to reduce all forms of arsenic in the water sample to arsenic trivalent, and then all arsenic trivalent is converted into gaseous arsine, and all arsenic to be measured is expelled to the colorimetric tank through liquid-gas conversion. The characteristic colorimetric agent in the colorimetric tank can react sensitively with gaseous arsine. The degree of color change of the solution in the colorimetric tank is proportional to the total arsenic content in the water sample to be measured, and the total arsenic content in the water sample can be calculated by measuring the degree of color change of the solution by photowriting colorimetry. The expulsion colorimetric technique can not only reduce the detection limit of total arsenic, but also eliminate the interference of various substances, especially phosphorus, on total arsenic measurement.
