China intends to strictly limit tin, antimony, mercury and other pollutant emission

UpdateTime : 2017/07/08  Hits :   

Ministry of Environmental Protection website released "tin, antimony, mercury industrial pollutant discharge standards" (second draft) (hereinafter referred to as the draft) full text. The release of the draft had a larger revision than the previous version, and the addition of special restrictions on water pollutants and air pollutants special emission limits.

This is the second public consultation for this standard. The first draft was released to the public in March 2008 and has been around five years. The preparation of the standard started in 2003, the purpose is to prevent and control environmental pollution, maintain ecological balance, protect human health, control non-ferrous metal industry pollutant emission, promote non-ferrous metal production technology and equipment and pollution control technology progress.

In the decade of the preparation work, including non-ferrous metals industry of producing tin, antimony, mercury had rapidly developed. Due to the lack of national standards for pollutant discharge standards, non-ferrous metal industry had become an important source of environmental pollution, and pollution accidents frequent accidents.

The draft made clear for water pollutants and air pollutants emission limits in the tin, antimony, mercury mining and smelting industrial enterprises, and clearly regulation in the production process of monitoring and monitoring requirements.

Explanations particularly clear about emission limit of tin, antimony, mercury and their compounds in sewage and waste areas in areas where "serious water pollution problems are likely to occur and where special protective measures are required" and "areas where serious atmospheric environmental pollution is likely to occur". These emission standards, to a certain extent, filled gaps in existing standards, such as the Integrated Wastewater Discharge Standard (GB 8978-1996), which specifies only the total mercury emission standards for effluents and does not cover emissions of tin and antimony.

China is the world's largest producer of tin, antimony ore, mercury mine, total reserves are also located the world's first, third. China is also one of the three major consumers and emitters of non-ferrous metals, only mercury emissions took up a quarter of global emissions.

On October 2013, the Chinese government delegation will attend the signing meeting of the "Minamata Convention" organized by the United Nations Environment Program. The Minamata Convention is the first legally binding mercury confinement convention in the world, the convention requires States parties to phase out all mercury mines within 15 years and to reduce or even prohibit the use of mercury within three years of the entry into force of the Convention.

In addition to the industry characteristics of pollutants, the draft also made a limit on the ammonia nitrogen, COD (chemical oxygen demand), hexavalent chromium and other 18 types of water pollutants and sulfur dioxide, fluoride, particulate matter and other 11 types of air pollutants.

China is facing the environmental and health challenges posed by the development of the nonferrous metals industry. The state has taken appropriate measures to accelerate the work of non-ferrous metal industry emission reduction. According to the "Comprehensive Prevention and Control of Heavy Metal Pollution 12th five plan", by 2015, the emission of heavy metal pollutants such as lead, mercury, chromium, cadmium and arsenic in key areas will be reduced 15% less than in 2007.

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