The neutralization method in the production of ammonium metatungstate does have some environmental issues, which are mainly reflected in the following aspects:
Large acid consumption
The neutralization method requires a large amount of nitric acid as an acidifier, which leads to high production costs, and there may be safety risks in the storage, transportation and use of nitric acid.
Wastewater generation
During the production process of the neutralization method, a large amount of wastewater will be generated. These wastewaters are weakly acidic and contain heavy metal ions such as lead, cadmium, nickel, and high concentrations of salt. If they are discharged directly without treatment, they will seriously pollute the water environment and cause great waste of water resources.
Environmental hazards
Since the neutralization method requires the use of nitric acid, this may cause the exhaust gas emissions in the production process to contain harmful gases such as nitrogen oxides, which will pollute the air environment. In addition, there is also a risk of leakage during the storage and use of nitric acid, which may pose a threat to the environment and human health.
Solid waste treatment
During the production process of the neutralization method, some solid wastes will be generated, such as insoluble matter after filtration. If these solid wastes are not properly treated, they may pollute the environment.
In order to reduce the environmental problems of the neutralization method in the production of ammonium metatungstate, the following measures can be taken:
Wastewater treatment
Deeply treat the generated wastewater to remove heavy metal ions and salts, so that it can meet the emission standards before being discharged or reused.
Waste gas treatment
Collect and treat the waste gas in the production process to reduce the emission of harmful gases such as nitrogen oxides.
Nitric acid safety management
Strengthen the storage and use management of nitric acid to prevent leakage and safety accidents.
Resource utilization of solid waste
Resource utilization of the generated solid waste, such as recycling useful substances or harmless treatment.
In short, although the neutralization method in the production of ammonium metatungstate is a commonly used production process, it also has some environmental problems. By taking appropriate measures for governance and management, the impact of these problems on the environment and human health can be effectively reduced.
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