Harm of nuclear waste water discharged into the sea

Harm of nuclear waste water discharged into the sea;

First, it affects the survival of marine animals and leads to their death; Second, radioactive substances may lead to species variation and affect the local environment; Third, radioactive substances may cause diseases and threaten human health.

Nuclear sewage treatment:

1, chemical precipitation method

Chemical precipitation is a method of precipitation between precipitant and trace radionuclide in wastewater. Most compounds such as hydroxide, carbonate and phosphate of radionuclides in wastewater are insoluble and can be removed during treatment.

The purpose of chemical treatment is to transfer and concentrate the radionuclides in wastewater into small-volume sludge, so that there is almost no radioactive residue in the precipitated wastewater, thus reaching the discharge standard.

2. Adsorption method

Activated carbon has strong adsorption capacity and high removal rate, but the regeneration efficiency of activated carbon is low, and the treated water quality is difficult to meet the reuse requirements, which is expensive and limited in application. In recent years, various adsorption materials with adsorption capacity have been gradually developed.

Related research shows that chitosan and its derivatives are good adsorbents for heavy metal ions. The crosslinked chitosan resin can be reused for many times, and its adsorption capacity has not been significantly reduced. Using modified sepiolite to treat heavy metal wastewater has a good adsorption capacity for Co and Ag, and the content of heavy metals in the treated wastewater is obviously lower than the comprehensive wastewater discharge standard.