Progress of Japan's nuclear sewage discharge to the sea: the first batch of 7800 tons will be discharged soon, and the second batch will be started at the end of this month at the earliest [with analysis of seawater desalination industry]

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Recently, the progress in the discharge of nuclear contaminated water from the Fukushima Daiichi Nuclear Power Station has attracted wide attention. It is reported that Tokyo Electric Power Company of Japan has released 6100 tons of nuclear contaminated water from the Fukushima nuclear power plant into the sea as of June 6, with a total discharge of 7800 tons. It is expected that the first batch of nuclear contaminated water will be discharged in the afternoon of the 10th of this month, And then use industrial water to flush the relevant equipment discharged into the sea to clean the residual nuclear contaminated water in the equipment. Meanwhile, the second batch of nuclear contaminated water discharge plan will start at the end of this month at the earliest.

Since the serious nuclear accident occurred in 2011, Fukushima Nuclear Power Plant has been facing the problem of nuclear contaminated water treatment. In order to relieve the pressure of the nuclear power plant, Tokyo Electric Power Company of Japan decided to discharge part of the nuclear contaminated water into the sea. This move has aroused controversy and concern at home and abroad, especially the impact on the marine environment and ecosystem. In addition, TEPCO has not yet given a specific schedule for the second batch of nuclear contaminated water discharge plan. However, it is expected to start as soon as the end of this month.

Japan's nuclear sewage discharge may pollute China's raw materials for seawater desalination

After Japan's nuclear sewage is discharged into the sea, it may cause the sea water in China's sea area to contain radionuclides such as C-14, xenon, strontium, cesium, iodine, etc., which pollutes the raw materials in the desalination process. In the process of seawater desalination, magnesium, potassium, bromine and other chemical elements need to be extracted from the concentrated seawater for treatment, but the seawater containing radionuclides cannot be filtered and degraded 。 Therefore, if concentrated seawater containing radionuclides is used for seawater desalination, the desalinated seawater still contains radioactive substances and cannot be directly used for industrial and domestic water.

Japan's nuclear sewage discharge harms for thousands or even tens of millions of years

Although the nuclear sewage discharged by Japan has been treated, it still contains C-14, xenon, strontium, cesium, iodine and other radionuclides, and these elements are difficult to decay and digest in thousands or even tens of millions of years, which will bring serious disasters to the global marine environment in the future.

Shang Qi, a researcher from the Environmental Institute of the Chinese Center for Disease Control and Prevention, believes that Japan's nuclear contaminated water discharged into the sea will cause lasting harm to human beings. He pointed out that similar painful lessons had been learned in the past. In 1956, Minamata disease occurred in Minamata Bay, Japan, which was a case of environmental pollution caused by industrial wastewater discharge and attracted global attention. Researcher Shang Qi pointed out that we know that the ocean is a huge ecosystem, in which there are multiple levels of food chains. Harmful substances will be enriched through the food chain, gradually accumulating from weak concentrations in the ocean to high concentrations. Minamata disease is a typical example. At that time, the concentration of mercury emitted by factories was very low, but through the enrichment of the food chain, the concentration of harmful substances exceeded 300000 times. Therefore, the local fishermen ate contaminated seafood, which led to the outbreak of Minamata disease.

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