With the rapid development of industrial civilization and the irrational use of land at home and abroad, the nutrients in the soil become depleted, and loss problems such as volatilization and leaching phenomena occur after fertilizers are applied to the soil.

In response to this measure, TEPCO said: When discharging nuclear wastewater, the tritium contained in the water will be diluted to less than one-fortieth of the Japanese national standard for tritium discharge from nuclear power plant wastewater, which is 60,000 becquerels of tritium activity per liter of water, and will also meet one-seventh of the World Health Organization drinking water standard.

After discussions, on April 13, 2021, the Japanese government held a cabinet meeting and formally decided to discharge the nuclear wastewater stored at TEPCO's Fukushima Daiichi nuclear power plant into the sea after filtering and diluting it again, ignoring questions and objections from domestic and international public opinion.

Zeolite is a water-bearing porous alkali metal or alkaline earth metal aluminosilicate mineral with a skeletal structure. It is widely available, has large reserves, and can be reused through recycling. Zeolite's unique structure, resource distribution and recyclability make it one of the most commonly used water treatment agents in wastewater treatment processes and is widely used for wastewater pollutants such as nitrogen, phosphorus, heavy metals and organic matter.

After saturation, the selective adsorption capacity or exchange capacity of zeolite will disappear, therefore, zeolite must be regenerated to restore its adsorption and exchange capacity so that zeolite can be recycled again, which not only saves cost, but also has no pollution to the environment. The regeneration of saturated adsorption zeolites is now a hot topic of research. Currently, physical, chemical, electrochemical and biological methods are the main methods of zeolite regeneration.

Zeolite itself has a multi-regular pore structure, and its pores are comparable to the molecular size of general substances, with a diameter of about 0.3~1nm, and its specific surface area is as high as 400~800m2/g. The special physical structure makes zeolite have two adsorption characteristics: selective adsorption and efficient adsorption.