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Heavy metal pollution control in the nonferrous industry needs to start from the source

Science and technology is a double-edged sword. Since the 20th century, science and technology have developed rapidly. Although it has promoted economic development and improved people's living standards, the ensuing environmental pollution problem has also cost mankind a heavy price. In recent years, including tin, antimony, mercury, including non-ferrous metals industry is developing rapidly. Due to the lack of pollutant discharge standards at the national level, the non-ferrous metal industry has become an important source of environmental pollution, and pollution accidents occur frequently. Since heavy metal pollution has penetrated into every aspect of life, the “invisible killer” of heavy metal pollution has eroded our body unconsciously. We have almost nowhere to escape and have no choice.

Heavy metal contamination refers to environmental pollution caused by heavy metals or their compounds. Mainly caused by human factors such as mining, exhaust emissions, sewage irrigation and the use of heavy metal products. The increase in the content of heavy metals in the environment due to human activities is beyond the normal range and leads to deterioration of environmental quality. Heavy metal pollution is different from other organic compounds. Many organic compounds can be degraded or relieved by physical, chemical or biological purification of nature. Heavy metals are highly enriched and difficult to degrade in the environment. At present, due to heavy metal mining, smelting and processing, many heavy metals such as lead , mercury, cadmium and cobalt have entered the atmosphere, water and soil, causing serious environmental pollution.

At the beginning of April 2011, China's first “Twelfth Five-Year Plan” – “Twelfth Five-Year Plan for Comprehensive Prevention and Control of Heavy Metal Pollution” was officially approved by the State Council, and the prevention and control plan sought to control five kinds of heavy metals. There are five main types of industries to be controlled, including heavy ferrous metal ore (including associated ore) mining and selection, heavy non-ferrous metal smelting, lead storage battery manufacturing, leather and its products, chemical raw materials and chemical products manufacturing. As a key industry, the non-ferrous metal mining, processing and processing smelting industry has been pushed to the cusp of heavy metal pollution prevention and control.

In August of this year, the website of the Ministry of Environmental Protection released the full text of the “Emission Standards for Pollutants of Tin, Antimony and Mercury” (Second Consultation Draft), and added special emission limits for water pollutants and special emission limits for atmospheric pollutants. The Exposure Draft clearly stipulates the limits, monitoring and monitoring requirements for water pollutants and atmospheric pollutants in the production process of tin, antimony, mercury mining and smelting industrial enterprises.

At the same time, Zhang Xizhong, deputy secretary-general of the Recycling Metals Branch of the China Nonferrous Metals Industry Association, revealed that four renewable non-ferrous metal industrial pollutant discharge standards for copper , aluminum , lead and zinc are expected to be promulgated at the end of this year.

As we all know, the treatment of heavy metal pollution has always been very difficult, especially heavy metals scattered in the soil and water, not only the blind spots of technology, but also the need to spend a lot of money and manpower. The introduction of planning and emission standards aims to control the emission of pollutants from the non-ferrous metals industry, promote the progress of non-ferrous metal industry production technology equipment and pollution control technology, and also consider the corporate social responsibility awareness.

In the future, China's heavy metal pollution control and governance policies are likely to continue to tighten, and the supervision and consolidation of existing non-ferrous metal enterprises will continue to increase. It is reported that some places have already dealt heavily with heavy metal pollution. The threshold for crimes of environmental pollution crimes in Doumen District of Zhuhai City has been lowered, the scope of pollutants has been further expanded, and the unit polluting environment can be convicted of competent personnel, and the punishment is increased. Therefore, China's non-ferrous metal industry should completely change the line of “polluting by pollution, even after pollution first”, actively starting from the source of pollution, implementing compulsory clean production, that is, using environmentally friendly equipment in production, reducing heavy metals from the source. The amount of pollutants generated, vigorously develop the circular economy, and actively monitor the discharge of pollutants and the management of emissions. Ensure that pollutants meet emissions standards and even achieve zero emissions.

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